[edk2-devel] [PATCH] add ArmCpuInfo EFI application

Marcin Juszkiewicz posted 1 patch 1 year ago
Failed in applying to current master (apply log)
There is a newer version of this series
.../Application/ArmCpuInfo/ArmCpuInfo.c       | 2277 +++++++++++++++++
.../Application/ArmCpuInfo/ArmCpuInfo.inf     |   38 +
.../Application/ArmCpuInfo/readargs.h         |   12 +
.../Application/ArmCpuInfo/readregs.s         |   49 +
MdeModulePkg/MdeModulePkg.dsc                 |    3 +-
5 files changed, 2378 insertions(+), 1 deletion(-)
create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readargs.h
create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readregs.s
[edk2-devel] [PATCH] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
App goes through ID_AA64*_EL1 system registers and decode their values.

First version which does not use much of current AArch64 support code
present in EDK2. Written to check what data is there and what can be
done with it.
---
 .../Application/ArmCpuInfo/ArmCpuInfo.c       | 2277 +++++++++++++++++
 .../Application/ArmCpuInfo/ArmCpuInfo.inf     |   38 +
 .../Application/ArmCpuInfo/readargs.h         |   12 +
 .../Application/ArmCpuInfo/readregs.s         |   49 +
 MdeModulePkg/MdeModulePkg.dsc                 |    3 +-
 5 files changed, 2378 insertions(+), 1 deletion(-)
 create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
 create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
 create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readargs.h
 create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readregs.s

diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
new file mode 100644
index 0000000000..79a02ae430
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
@@ -0,0 +1,2277 @@
+/** @file
+
+  Copyright (c) 2023 Marcin Juszkiewicz
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <stdbool.h>
+#include <Library/UefiLib.h>
+#include "readargs.h"
+
+bool sve_present = false;
+bool sme_present = false;
+
+void print_text(const char* field, const char* bits, const char* value, const char* description)
+{
+	AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, value, description);
+}
+
+void print_values(const char* field, const char* bits, const int value, const char* description)
+{
+	char binaries[17][5] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
+				"1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};
+
+	AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, binaries[value], description);
+}
+
+void print_spacer(void)
+{
+	AsciiPrint("------------------|-------|-------|----------------------------------------------\n");
+}
+
+void handle_aa64mmfr0_el1(const UINT64 aa64mmfr0_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64MMFR0_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = aa64mmfr0_el1 & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "32 bits (4GB) of physical address range supported.";
+			break;
+		case 0b0001:
+			description = "36 bits (64GB) of physical address range supported.";
+			break;
+		case 0b0010:
+			description = "40 bits (1TB) of physical address range supported.";
+			break;
+		case 0b0011:
+			description = "42 bits (4TB) of physical address range supported.";
+			break;
+		case 0b0100:
+			description = "44 bits (16TB) of physical address range supported.";
+			break;
+		case 0b0101:
+			description = "48 bits (256TB) of physical address range supported.";
+			break;
+		case 0b0110:
+			description = "52 bits (4PB) of physical address range supported.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+	if(value == 0b0110)
+		print_text("", "", "", "FEAT_LPA implemented.");
+
+
+	bits = "7:4 ";
+	value = (aa64mmfr0_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "ASID: 8 bits";
+			break;
+		case 0b0010:
+			description = "ASID: 16 bits";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64mmfr0_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "No mixed-endian support.";
+			break;
+		case 0b0001:
+			description = "Mixed-endian support.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// only valid for BigEnd != 0b0000
+	if( ((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 )
+	{
+		if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 )
+		{
+				print_values("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
+		}
+		if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 )
+		{
+				print_values("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
+		}
+	}
+
+	bits = "15:12";
+	value = (aa64mmfr0_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "No support for a distinction between Secure and Non-Secure Memory.";
+			break;
+		case 0b0001:
+			description = "Supports a distinction between Secure and Non-Secure Memory.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64mmfr0_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = " 4KB granule supported.";
+			break;
+		case 0b1111:
+			description = " 4KB granule not supported.";
+			break;
+		case 0b0001: // add FEAT_LPA2 check
+			description = " 4KB granule supported for 52-bit address.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64mmfr0_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0001:
+			description = " 4KB granule not supported at stage 2.";
+			break;
+		case 0b0010:
+			description = " 4KB granule supported at stage 2.";
+			break;
+		case 0b0011:
+			description = " 4KB granule supported at stage 2 for 52-bit address.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64mmfr0_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "16KB granule not supported.";
+			break;
+		case 0b0001:
+			description = "16KB granule supported.";
+			break;
+		case 0b0010: // add FEAT_LPA2 check
+			description = "16KB granule supported for 52-bit address.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64mmfr0_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0001:
+			description = "16KB granule not supported at stage 2.";
+			break;
+		case 0b0010:
+			description = "16KB granule supported at stage 2.";
+			break;
+		case 0b0011:
+			description = "16KB granule supported at stage 2 for 52-bit address.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64mmfr0_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "64KB granule supported.";
+			break;
+		case 0b1111:
+			description = "64KB granule not supported.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64mmfr0_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0001:
+			description = "64KB granule not supported at stage 2.";
+			break;
+		case 0b0010:
+			description = "64KB granule supported at stage 2.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64mmfr0_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_ExS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_ExS implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 55:48 reserved
+
+	bits = "59:56";
+	value = (aa64mmfr0_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_FGT not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_FGT implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "63:60";
+	value = (aa64mmfr0_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_ECV not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_ECV implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_ECV implemented with extras.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+void handle_aa64mmfr1_el1(const UINT64 aa64mmfr1_el1, const UINT64 aa64pfr0_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64MMFR1_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = aa64mmfr1_el1 & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_HAFDBS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_HAFDBS implemented without dirty status support.";
+			break;
+		case 0b0010:
+			description = "FEAT_HAFDBS implemented with dirty status support.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64mmfr1_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_VMID16 not implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_VMID16 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64mmfr1_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_VHE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_VHE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64mmfr1_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_HPDS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_HPDS implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_HPDS2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64mmfr1_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LOR not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LOR implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64mmfr1_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_PAN not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PAN implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_PAN2 implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_PAN3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// when FEAT_RAS implemented
+	if( (((aa64pfr0_el1 >> 28) & 0xf) == 0b0001 ) ||
+	    (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010 ))
+	{
+		if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 )
+		{
+				print_values("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
+				print_text("", "", "", "an External abort on a speculative read.");
+		}
+		if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 )
+		{
+				print_values("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
+				print_text("", "", "", "an External abort on a speculative read.");
+		}
+	}
+
+	bits = "31:28";
+	value = (aa64mmfr1_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_XNX not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_XNX implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64mmfr1_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TWED not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TWED implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64mmfr1_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_ETS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_ETS implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64mmfr1_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_HCX not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_HCX implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64mmfr1_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_AFP not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_AFP implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "51:48";
+	value = (aa64mmfr1_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_nTLBPA not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_nTLBPA implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64mmfr1_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TIDCP1 not implemented";
+			break;
+		case 0b0001:
+			description = "FEAT_TIDCP1 implemented";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "59:56";
+	value = (aa64mmfr1_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_CMOW not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_CMOW implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 63:60 reserved
+}
+
+void handle_aa64mmfr2_el1(const UINT64 aa64mmfr2_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64MMFR2_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = (aa64mmfr2_el1)       & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TTCNP not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TTCNP implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64mmfr2_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_UAO not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_UAO implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64mmfr2_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LSMAOC not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LSMAOC implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64mmfr2_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_IESB not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_IESB implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64mmfr2_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LVA not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LVA implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64mmfr2_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_CCIDX not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_CCIDX implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64mmfr2_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_NV not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_NV implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_NV2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64mmfr2_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TTST not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TTST implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64mmfr2_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LSE2 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LSE2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64mmfr2_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_IDST not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_IDST implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64mmfr2_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_S2FWB not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_S2FWB implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 47:44 reserved
+
+	bits = "51:48";
+	value = (aa64mmfr2_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TTL not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TTL implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64mmfr2_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_BBM: Level 0 support for changing block size is supported.";
+			break;
+		case 0b0001:
+			description = "FEAT_BBM: Level 1 support for changing block size is supported.";
+			break;
+		case 0b0010:
+			description = "FEAT_BBM: Level 2 support for changing block size is supported.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "59:56";
+	value = (aa64mmfr2_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_EVT not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
+			break;
+		case 0b0010:
+			description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "63:60";
+	value = (aa64mmfr2_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_E0PD not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_E0PD implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+void handle_aa64pfr0_el1(const UINT64 aa64pfr0_el1, const UINT64 aa64pfr1_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64PFR0_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = (aa64pfr0_el1)       & 0xf;
+	switch(value)
+	{
+		case 0b0001:
+			description = "EL0 in AArch64 only";
+			break;
+		case 0b0010:
+			description = "EL0 in AArch64 and AArch32";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64pfr0_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0001:
+			description = "EL1 in AArch64 only";
+			break;
+		case 0b0010:
+			description = "EL1 in AArch64 and AArch32";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64pfr0_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "EL2 not implemented.";
+			break;
+		case 0b0001:
+			description = "EL2 in AArch64 only";
+			break;
+		case 0b0010:
+			description = "EL2 in AArch64 and AArch32";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64pfr0_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "EL3 not implemented.";
+			break;
+		case 0b0001:
+			description = "EL3 in AArch64 only";
+			break;
+		case 0b0010:
+			description = "EL3 in AArch64 and AArch32";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64pfr0_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Floating-point implemented.";
+			break;
+		case 0b0001:
+			description = "Floating-point with half-precision support (FEAT_FP16).";
+			break;
+		case 0b1111:
+			description = "Floating-point not implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64pfr0_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Advanced SIMD implemented.";
+			break;
+		case 0b0001:
+			description = "Advanced SIMD with half precision support (FEAT_FP16).";
+			break;
+		case 0b1111:
+			description = "Advanced SIMD not implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64pfr0_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "System registers of GIC CPU not implemented.";
+			break;
+		case 0b0001:
+			description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
+			break;
+		case 0b0011:
+			description = "System registers to versions 4.1 of GIC CPU implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64pfr0_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RAS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_RAS implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_RASv1p1 implemented.";
+			// 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented. 
+			if( (((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
+				(((aa64pfr0_el1 >> 12) & 0xf) == 0b0010) )
+				description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64pfr0_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SVE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SVE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64pfr0_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Secure EL2 not implemented.";
+			break;
+		case 0b0001:
+			description = "Secure EL2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64pfr0_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
+				description = "FEAT_MPAM not implemented.";
+			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
+				description = "FEAT_MPAM v0.1 implemented.";
+			break;
+		case 0b0001:
+			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
+				description = "FEAT_MPAM v1.0 implemented.";
+			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
+				description = "FEAT_MPAM v1.1 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64pfr0_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_AMU not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_AMUv1 implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_AMUv1p1 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "51:48";
+	value = (aa64pfr0_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_DIT not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_DIT implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64pfr0_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RME not implemented";
+			break;
+		case 0b0001:
+			description = "FEAT_RME implemented";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "59:56";
+	value = (aa64pfr0_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "no info is FEAT_CSV2 implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_CSV2 implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_CSV2_2 implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_CSV2_3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+	if(value == 0b0001)
+	{
+		if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 )
+		{
+			print_values("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
+		}
+		if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 )
+		{
+			print_values("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
+		}
+	}
+
+	bits = "63:60";
+	value = (aa64pfr0_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_CSV3 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_CSV3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+void handle_aa64pfr1_el1(const UINT64 aa64pfr1_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64PFR1_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = aa64pfr1_el1 & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_BTI not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_BTI implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64pfr1_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SSBS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SSBS implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_SSBS2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64pfr1_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_MTE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_MTE implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_MTE2 implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_MTE3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 15:12 is RAS_frac
+	// 19:16 is MPAM_frac
+	// 23:20 is reserved
+
+	bits = "27:24";
+	value = (aa64pfr1_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SME not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SME implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64pfr1_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RNG_TRAP not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_RNG_TRAP implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 35:32 is CSV2_frac
+
+	bits = "39:36";
+	value = (aa64pfr1_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_NMI not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_NMI implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 63:40 are reserved
+}
+
+void handle_aa64isar0_el1(const UINT64 aa64isar0_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64ISAR0_EL1";
+	char* description;
+	char* bits;
+
+
+	// 3:0 reserved
+
+	bits = "7:4 ";
+	value = (aa64isar0_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_AES, FEAT_PMULL not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_AES implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_AES and FEAT_PMULL implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64isar0_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SHA1 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SHA1 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64isar0_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SHA256 implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_SHA512 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64isar0_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "CRC32 not implemented.";
+			break;
+		case 0b0001:
+			description = "CRC32 instructions implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64isar0_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LSE not implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_LSE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64isar0_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "TME instructions not implemented.";
+			break;
+		case 0b0001:
+			description = "TME instructions implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64isar0_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RDM not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_RDM implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64isar0_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SHA3 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SHA3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64isar0_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SM3 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SM3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64isar0_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SM4 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SM4 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64isar0_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_DotProd not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_DotProd implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+
+	bits = "51:48";
+	value = (aa64isar0_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_FHM not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_FHM implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64isar0_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_FlagM implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_FlagM2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "59:56";
+	value = (aa64isar0_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TLBIOS implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_TLBIRANGE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "63:60";
+	value = (aa64isar0_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RNG not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_RNG implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+void handle_aa64isar1_el1(const UINT64 aa64isar1_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64ISAR1_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = (aa64isar1_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "DC CVAP not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_DPB implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_DPB2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64isar1_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Address Authentication (APA) not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PAuth implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_EPAC implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_PAuth2 implemented.";
+			break;
+		case 0b0100:
+			description = "FEAT_FPAC implemented.";
+			break;
+		case 0b0101:
+			description = "FEAT_FPACCOMBINE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+	if(value > 0)
+		print_text("", "", "", "FEAT_PACQARMA5 implemented.");
+
+	bits = "11:8 ";
+	value = (aa64isar1_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Address Authentication (API) not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PAuth implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_EPAC implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_PAuth2 implemented.";
+			break;
+		case 0b0100:
+			description = "FEAT_FPAC implemented.";
+			break;
+		case 0b0101:
+			description = "FEAT_FPACCOMBINE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+	if(value > 0)
+		print_text("", "", "", "FEAT_PACIMP implemented.");
+
+	bits = "15:12";
+	value = (aa64isar1_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_JSCVT not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_JSCVT implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64isar1_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_FCMA not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_FCMA implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64isar1_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LRCPC(2) not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LRCPC implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_LRCPC2 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64isar1_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_PACQARMA5 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PACQARMA5 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "31:28";
+	value = (aa64isar1_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_PACIMP not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PACIMP implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64isar1_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_FRINTTS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_FRINTTS implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64isar1_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SB not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SB implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64isar1_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SPECRES not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SPECRES implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64isar1_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_BF16 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_BF16 implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_EBF16 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+
+	bits = "51:48";
+	value = (aa64isar1_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_DGH not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_DGH implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64isar1_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_I8MM not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_I8MM implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "59:56";
+	value = (aa64isar1_el1 >> 56) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_XS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_XS implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "63:60";
+	value = (aa64isar1_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_LS64 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_LS64 implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_LS64_V implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_LS64_ACCDATA implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+void handle_aa64isar2_el1(const UINT64 aa64isar2_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64ISAR2_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = (aa64isar2_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_WFxT not implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_WFxT implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64isar2_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_RPRES not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_RPRES implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64isar2_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_PACQARMA3 not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PACQARMA3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64isar2_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Address Authentication (APA3) not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PAuth implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_EPAC implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_PAuth2 implemented.";
+			break;
+		case 0b0100:
+			description = "FEAT_FPAC implemented.";
+			break;
+		case 0b0101:
+			description = "FEAT_FPACCOMBINE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "19:16";
+	value = (aa64isar2_el1 >> 16) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_MOPS not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_MOPS implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "23:20";
+	value = (aa64isar2_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_HBC not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_HBC implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "27:24";
+	value = (aa64isar2_el1 >> 24) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_CONSTPACFIELD not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_CONSTPACFIELD implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 63:28 reserved
+}
+
+void handle_aa64dfr0_el1(const UINT64 aa64dfr0_el1)
+{
+	UINT64 value;
+	char* regname = "ID_AA64DFR0_EL1";
+	char* description;
+	char* bits;
+
+
+	bits = "3:0 ";
+	value = (aa64dfr0_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0110:
+			description = "Armv8 debug architecture";
+			break;
+		case 0b0111:
+			description = "Armv8 debug architecture with VHE";
+			break;
+		case 0b1000:
+			description = "FEAT_Debugv8p2 implemented.";
+			break;
+		case 0b1001:
+			description = "FEAT_Debugv8p4 implemented.";
+			break;
+		case 0b1010:
+			description = "FEAT_Debugv8p8 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "7:4 ";
+	value = (aa64dfr0_el1 >>  4) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Trace unit System registers not implemented.";
+			break;
+		case 0b0001:
+			description = "Trace unit System registers implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "11:8 ";
+	value = (aa64dfr0_el1 >>  8) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Performance Monitors Extension not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_PMUv3 implemented.";
+			break;
+		case 0b0100:
+			description = "FEAT_PMUv3p1 implemented.";
+			break;
+		case 0b0101:
+			description = "FEAT_PMUv3p4 implemented.";
+			break;
+		case 0b0110:
+			description = "FEAT_PMUv3p5 implemented.";
+			break;
+		case 0b0111:
+			description = "FEAT_PMUv3p7 implemented.";
+			break;
+		case 0b1000:
+			description = "FEAT_PMUv3p8 implemented.";
+			break;
+		case 0b1111:
+			description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "15:12";
+	value = (aa64dfr0_el1 >> 12) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "reserved";
+			break;
+		default:
+			description = "Number of breakpoints, minus 1.";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 19:16 reserved
+
+	bits = "23:20";
+	value = (aa64dfr0_el1 >> 20) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "reserved";
+			break;
+		default:
+			description = "Number of watchpoints, minus 1.";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 27:24 reserved
+
+	bits = "31:28";
+	value = (aa64dfr0_el1 >> 28) & 0xf;
+	switch(value)
+	{
+		default:
+			description = "Number of breakpoints that are context-aware, minus 1.";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "35:32";
+	value = (aa64dfr0_el1 >> 32) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_SPE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_SPE implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_SPEv1p1 implemented.";
+			break;
+		case 0b0011:
+			description = "FEAT_SPEv1p2 implemented.";
+			break;
+		case 0b0100:
+			description = "FEAT_SPEv1p3 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "39:36";
+	value = (aa64dfr0_el1 >> 36) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_DoubleLock implemented.";
+			break;
+		case 0b1111:
+			description = "FEAT_DoubleLock not implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "43:40";
+	value = (aa64dfr0_el1 >> 40) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TRF not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TRF implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "47:44";
+	value = (aa64dfr0_el1 >> 44) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_TRBE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_TRBE implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+
+	bits = "51:48";
+	value = (aa64dfr0_el1 >> 48) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_MTPMU not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
+			break;
+		case 0b1111:
+			description = "FEAT_MTPMU not implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	bits = "55:52";
+	value = (aa64dfr0_el1 >> 52) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "FEAT_BRBE not implemented.";
+			break;
+		case 0b0001:
+			description = "FEAT_BRBE implemented.";
+			break;
+		case 0b0010:
+			description = "FEAT_BRBEv1p1 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+
+	// 59:56 reserved
+
+	bits = "63:60";
+	value = (aa64dfr0_el1 >> 60) & 0xf;
+	switch(value)
+	{
+		case 0b0000:
+			description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
+			break;
+		case 0b0001:
+			description = "FEAT_HPMN0 implemented.";
+			break;
+		default:
+			description = "unknown";
+			break;
+	}
+	print_values(regname, bits, value, description);
+}
+
+EFI_STATUS
+	EFIAPI
+UefiMain (
+		IN EFI_HANDLE        ImageHandle,
+		IN EFI_SYSTEM_TABLE  *SystemTable
+	 )
+{
+	UINT64 aa64dfr0_el1 = read_aa64dfr0_el1();
+	UINT64 aa64dfr1_el1 = read_aa64dfr1_el1();
+	UINT64 aa64isar0_el1 = read_aa64isar0_el1();
+	UINT64 aa64isar1_el1 = read_aa64isar1_el1();
+	UINT64 aa64isar2_el1 = read_aa64isar2_el1();
+	UINT64 aa64mmfr0_el1 = read_aa64mmfr0_el1();
+	UINT64 aa64mmfr1_el1 = read_aa64mmfr1_el1();
+	UINT64 aa64mmfr2_el1 = read_aa64mmfr2_el1();
+	UINT64 aa64pfr0_el1 = read_aa64pfr0_el1();
+	UINT64 aa64pfr1_el1 = read_aa64pfr1_el1();
+/*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1();*/
+/*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1();*/
+
+	AsciiPrint("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
+	AsciiPrint("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
+	AsciiPrint("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
+	AsciiPrint("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
+	AsciiPrint("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
+	AsciiPrint("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
+	AsciiPrint("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
+	AsciiPrint("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
+	AsciiPrint("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
+	AsciiPrint("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);	// ignore
+/*    AsciiPrint("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
+/*    AsciiPrint("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
+
+	AsciiPrint("\n");
+	print_text("Register", "Bits", "Value", "Feature");
+	print_spacer();
+
+	handle_aa64mmfr0_el1(aa64mmfr0_el1);
+	print_spacer();
+	handle_aa64mmfr1_el1(aa64mmfr1_el1, aa64pfr0_el1);
+	print_spacer();
+	handle_aa64mmfr2_el1(aa64mmfr2_el1);
+
+	print_spacer();
+	handle_aa64pfr0_el1(aa64pfr0_el1, aa64pfr1_el1);
+	print_spacer();
+	handle_aa64pfr1_el1(aa64pfr1_el1);
+
+	print_spacer();
+	handle_aa64isar0_el1(aa64isar0_el1);
+	print_spacer();
+	handle_aa64isar1_el1(aa64isar1_el1);
+	print_spacer();
+	handle_aa64isar2_el1(aa64isar2_el1);
+
+	print_spacer();
+	handle_aa64dfr0_el1(aa64dfr0_el1);
+
+	return EFI_SUCCESS;
+}
diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
new file mode 100644
index 0000000000..aa4a1ea148
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
@@ -0,0 +1,38 @@
+## @file
+#
+#  Attempt to have AArch64 cpu information.
+#
+#  Based on HelloWorld:
+#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
+#  Copyright (c) 2023 Marcin Juszkiewicz
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010019
+  BASE_NAME                      = ArmCpuInfo
+  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = UefiMain
+
+#
+#  This flag specifies whether HII resource section is generated into PE image.
+#
+  UEFI_HII_RESOURCE_SECTION      = TRUE
+
+[Sources]
+  ArmCpuInfo.c
+  readregs.s
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  UefiApplicationEntryPoint
+  UefiLib
diff --git a/MdeModulePkg/Application/ArmCpuInfo/readargs.h b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
new file mode 100644
index 0000000000..eaa52cf161
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
@@ -0,0 +1,12 @@
+UINT64 read_aa64pfr0_el1(void);
+UINT64 read_aa64pfr1_el1(void);
+UINT64 read_aa64dfr0_el1(void);
+UINT64 read_aa64dfr1_el1(void);
+UINT64 read_aa64isar0_el1(void);
+UINT64 read_aa64isar1_el1(void);
+UINT64 read_aa64isar2_el1(void);
+UINT64 read_aa64mmfr0_el1(void);
+UINT64 read_aa64mmfr1_el1(void);
+UINT64 read_aa64mmfr2_el1(void);
+UINT64 read_aa64smfr0_el1(void);
+UINT64 read_aa64zfr0_el1(void);
diff --git a/MdeModulePkg/Application/ArmCpuInfo/readregs.s b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
new file mode 100644
index 0000000000..19312f1e27
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
@@ -0,0 +1,49 @@
+#include <AsmMacroIoLibV8.h>
+
+ASM_FUNC(read_aa64pfr0_el1)
+	mrs x0, ID_AA64PFR0_EL1;
+	ret;
+
+ASM_FUNC(read_aa64pfr1_el1)
+	mrs x0, ID_AA64PFR1_EL1;
+	ret;
+
+ASM_FUNC(read_aa64dfr0_el1)
+	mrs x0, ID_AA64DFR0_EL1;
+	ret;
+
+ASM_FUNC(read_aa64dfr1_el1)
+	mrs x0, ID_AA64DFR1_EL1;
+	ret;
+
+ASM_FUNC(read_aa64isar0_el1)
+	mrs x0, ID_AA64ISAR0_EL1;
+	ret;
+
+ASM_FUNC(read_aa64isar1_el1)
+	mrs x0, ID_AA64ISAR1_EL1;
+	ret;
+
+ASM_FUNC(read_aa64isar2_el1)
+	mrs x0, ID_AA64ISAR2_EL1;
+	ret;
+
+ASM_FUNC(read_aa64mmfr0_el1)
+	mrs x0, ID_AA64MMFR0_EL1;
+	ret;
+
+ASM_FUNC(read_aa64mmfr1_el1)
+	mrs x0, ID_AA64MMFR1_EL1;
+	ret;
+
+ASM_FUNC(read_aa64mmfr2_el1)
+	mrs x0, ID_AA64MMFR2_EL1;
+	ret;
+
+# ASM_FUNC(read_aa64zfr0_el1)
+#     mrs x0, ID_AA64ZFR0_EL1;
+#     ret;
+
+# ASM_FUNC(read_aa64smfr0_el1)
+#     mrs x0, ID_AA64SMFR0_EL1;
+#     ret;
diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
index 1014598f31..1ecfb34515 100644
--- a/MdeModulePkg/MdeModulePkg.dsc
+++ b/MdeModulePkg/MdeModulePkg.dsc
@@ -216,6 +216,7 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"FVMAIN.FV"
 
 [Components]
+  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
   MdeModulePkg/Application/HelloWorld/HelloWorld.inf
   MdeModulePkg/Application/DumpDynPcd/DumpDynPcd.inf
   MdeModulePkg/Application/MemoryProfileInfo/MemoryProfileInfo.inf
@@ -520,4 +521,4 @@
   MdeModulePkg/Universal/CapsulePei/CapsuleX64.inf
 
 [BuildOptions]
-
+GCC:*_*_AARCH64_CC_FLAGS = -march=armv9-a
-- 
2.40.0



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102325): https://edk2.groups.io/g/devel/message/102325
Mute This Topic: https://groups.io/mt/97979062/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH] add ArmCpuInfo EFI application
Posted by Rebecca Cran 1 year ago
Looks good - thanks.

There are a few style issues:


First, this patch came through as quoted-printable, with some lines 
wrapped. I'd be interested to learn how other people are dealing with 
this, since I've not seen complaints since Lazslo left the project.

Are people saving the _formatted_ output to apply with git? Or is there 
a script which can demangle the saved emails?


diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePk=
g/Application/ArmCpuInfo/ArmCpuInfo.c
new file mode 100644
index 0000000000..79a02ae430
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
@@ -0,0 +1,2277 @@
+/** @file
+
+  Copyright (c) 2023 Marcin Juszkiewicz
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <stdbool.h>
+#include <Library/UefiLib.h>
+#include "readargs.h"
+
+bool sve_present =3D false;
+bool sme_present =3D false;


There are also some style issues: the ones I've noticed are using tabs 
(edk2 uses spaces) and not having a space before the opening parenthesis 
in function calls - e.g.:


AsciiPrint("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);


If you push your changes to a fork on GitHub you can submit a private PR 
and have CI run against it to tell you any further issues, or I can 
fixup the formatting and send you a copy if you'd like.


-- 

Rebecca Cran


On 3/31/23 12:02 PM, Marcin Juszkiewicz wrote:
> App goes through ID_AA64*_EL1 system registers and decode their values.
>
> First version which does not use much of current AArch64 support code
> present in EDK2. Written to check what data is there and what can be
> done with it.
> ---
>   .../Application/ArmCpuInfo/ArmCpuInfo.c       | 2277 +++++++++++++++++
>   .../Application/ArmCpuInfo/ArmCpuInfo.inf     |   38 +
>   .../Application/ArmCpuInfo/readargs.h         |   12 +
>   .../Application/ArmCpuInfo/readregs.s         |   49 +
>   MdeModulePkg/MdeModulePkg.dsc                 |    3 +-
>   5 files changed, 2378 insertions(+), 1 deletion(-)
>   create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
>   create mode 100644 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
>   create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readargs.h
>   create mode 100644 MdeModulePkg/Application/ArmCpuInfo/readregs.s
>
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
> new file mode 100644
> index 0000000000..79a02ae430
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
> @@ -0,0 +1,2277 @@
> +/** @file
> +
> +  Copyright (c) 2023 Marcin Juszkiewicz
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> + **/
> +
> +#include <stdbool.h>
> +#include <Library/UefiLib.h>
> +#include "readargs.h"
> +
> +bool sve_present = false;
> +bool sme_present = false;
> +
> +void print_text(const char* field, const char* bits, const char* value, const char* description)
> +{
> +	AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, value, description);
> +}
> +
> +void print_values(const char* field, const char* bits, const int value, const char* description)
> +{
> +	char binaries[17][5] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
> +				"1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};
> +
> +	AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, binaries[value], description);
> +}
> +
> +void print_spacer(void)
> +{
> +	AsciiPrint("------------------|-------|-------|----------------------------------------------\n");
> +}
> +
> +void handle_aa64mmfr0_el1(const UINT64 aa64mmfr0_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64MMFR0_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = aa64mmfr0_el1 & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "32 bits (4GB) of physical address range supported.";
> +			break;
> +		case 0b0001:
> +			description = "36 bits (64GB) of physical address range supported.";
> +			break;
> +		case 0b0010:
> +			description = "40 bits (1TB) of physical address range supported.";
> +			break;
> +		case 0b0011:
> +			description = "42 bits (4TB) of physical address range supported.";
> +			break;
> +		case 0b0100:
> +			description = "44 bits (16TB) of physical address range supported.";
> +			break;
> +		case 0b0101:
> +			description = "48 bits (256TB) of physical address range supported.";
> +			break;
> +		case 0b0110:
> +			description = "52 bits (4PB) of physical address range supported.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +	if(value == 0b0110)
> +		print_text("", "", "", "FEAT_LPA implemented.");
> +
> +
> +	bits = "7:4 ";
> +	value = (aa64mmfr0_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "ASID: 8 bits";
> +			break;
> +		case 0b0010:
> +			description = "ASID: 16 bits";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64mmfr0_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "No mixed-endian support.";
> +			break;
> +		case 0b0001:
> +			description = "Mixed-endian support.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// only valid for BigEnd != 0b0000
> +	if( ((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 )
> +	{
> +		if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 )
> +		{
> +				print_values("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
> +		}
> +		if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 )
> +		{
> +				print_values("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
> +		}
> +	}
> +
> +	bits = "15:12";
> +	value = (aa64mmfr0_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "No support for a distinction between Secure and Non-Secure Memory.";
> +			break;
> +		case 0b0001:
> +			description = "Supports a distinction between Secure and Non-Secure Memory.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64mmfr0_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = " 4KB granule supported.";
> +			break;
> +		case 0b1111:
> +			description = " 4KB granule not supported.";
> +			break;
> +		case 0b0001: // add FEAT_LPA2 check
> +			description = " 4KB granule supported for 52-bit address.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64mmfr0_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0001:
> +			description = " 4KB granule not supported at stage 2.";
> +			break;
> +		case 0b0010:
> +			description = " 4KB granule supported at stage 2.";
> +			break;
> +		case 0b0011:
> +			description = " 4KB granule supported at stage 2 for 52-bit address.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64mmfr0_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "16KB granule not supported.";
> +			break;
> +		case 0b0001:
> +			description = "16KB granule supported.";
> +			break;
> +		case 0b0010: // add FEAT_LPA2 check
> +			description = "16KB granule supported for 52-bit address.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64mmfr0_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0001:
> +			description = "16KB granule not supported at stage 2.";
> +			break;
> +		case 0b0010:
> +			description = "16KB granule supported at stage 2.";
> +			break;
> +		case 0b0011:
> +			description = "16KB granule supported at stage 2 for 52-bit address.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64mmfr0_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "64KB granule supported.";
> +			break;
> +		case 0b1111:
> +			description = "64KB granule not supported.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64mmfr0_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0001:
> +			description = "64KB granule not supported at stage 2.";
> +			break;
> +		case 0b0010:
> +			description = "64KB granule supported at stage 2.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64mmfr0_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_ExS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_ExS implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 55:48 reserved
> +
> +	bits = "59:56";
> +	value = (aa64mmfr0_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_FGT not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_FGT implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "63:60";
> +	value = (aa64mmfr0_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_ECV not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_ECV implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_ECV implemented with extras.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64mmfr1_el1(const UINT64 aa64mmfr1_el1, const UINT64 aa64pfr0_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64MMFR1_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = aa64mmfr1_el1 & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_HAFDBS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_HAFDBS implemented without dirty status support.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_HAFDBS implemented with dirty status support.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64mmfr1_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_VMID16 not implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_VMID16 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64mmfr1_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_VHE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_VHE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64mmfr1_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_HPDS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_HPDS implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_HPDS2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64mmfr1_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LOR not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LOR implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64mmfr1_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_PAN not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PAN implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_PAN2 implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_PAN3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// when FEAT_RAS implemented
> +	if( (((aa64pfr0_el1 >> 28) & 0xf) == 0b0001 ) ||
> +	    (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010 ))
> +	{
> +		if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 )
> +		{
> +				print_values("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
> +				print_text("", "", "", "an External abort on a speculative read.");
> +		}
> +		if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 )
> +		{
> +				print_values("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
> +				print_text("", "", "", "an External abort on a speculative read.");
> +		}
> +	}
> +
> +	bits = "31:28";
> +	value = (aa64mmfr1_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_XNX not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_XNX implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64mmfr1_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TWED not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TWED implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64mmfr1_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_ETS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_ETS implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64mmfr1_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_HCX not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_HCX implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64mmfr1_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_AFP not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_AFP implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "51:48";
> +	value = (aa64mmfr1_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_nTLBPA not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_nTLBPA implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64mmfr1_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TIDCP1 not implemented";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TIDCP1 implemented";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "59:56";
> +	value = (aa64mmfr1_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_CMOW not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_CMOW implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 63:60 reserved
> +}
> +
> +void handle_aa64mmfr2_el1(const UINT64 aa64mmfr2_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64MMFR2_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = (aa64mmfr2_el1)       & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TTCNP not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TTCNP implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64mmfr2_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_UAO not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_UAO implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64mmfr2_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LSMAOC not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LSMAOC implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64mmfr2_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_IESB not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_IESB implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64mmfr2_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LVA not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LVA implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64mmfr2_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_CCIDX not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_CCIDX implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64mmfr2_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_NV not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_NV implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_NV2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64mmfr2_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TTST not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TTST implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64mmfr2_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LSE2 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LSE2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64mmfr2_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_IDST not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_IDST implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64mmfr2_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_S2FWB not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_S2FWB implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 47:44 reserved
> +
> +	bits = "51:48";
> +	value = (aa64mmfr2_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TTL not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TTL implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64mmfr2_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_BBM: Level 0 support for changing block size is supported.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_BBM: Level 1 support for changing block size is supported.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_BBM: Level 2 support for changing block size is supported.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "59:56";
> +	value = (aa64mmfr2_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_EVT not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "63:60";
> +	value = (aa64mmfr2_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_E0PD not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_E0PD implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64pfr0_el1(const UINT64 aa64pfr0_el1, const UINT64 aa64pfr1_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64PFR0_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = (aa64pfr0_el1)       & 0xf;
> +	switch(value)
> +	{
> +		case 0b0001:
> +			description = "EL0 in AArch64 only";
> +			break;
> +		case 0b0010:
> +			description = "EL0 in AArch64 and AArch32";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64pfr0_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0001:
> +			description = "EL1 in AArch64 only";
> +			break;
> +		case 0b0010:
> +			description = "EL1 in AArch64 and AArch32";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64pfr0_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "EL2 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "EL2 in AArch64 only";
> +			break;
> +		case 0b0010:
> +			description = "EL2 in AArch64 and AArch32";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64pfr0_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "EL3 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "EL3 in AArch64 only";
> +			break;
> +		case 0b0010:
> +			description = "EL3 in AArch64 and AArch32";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64pfr0_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Floating-point implemented.";
> +			break;
> +		case 0b0001:
> +			description = "Floating-point with half-precision support (FEAT_FP16).";
> +			break;
> +		case 0b1111:
> +			description = "Floating-point not implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64pfr0_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Advanced SIMD implemented.";
> +			break;
> +		case 0b0001:
> +			description = "Advanced SIMD with half precision support (FEAT_FP16).";
> +			break;
> +		case 0b1111:
> +			description = "Advanced SIMD not implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64pfr0_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "System registers of GIC CPU not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
> +			break;
> +		case 0b0011:
> +			description = "System registers to versions 4.1 of GIC CPU implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64pfr0_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RAS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RAS implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_RASv1p1 implemented.";
> +			// 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
> +			if( (((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
> +				(((aa64pfr0_el1 >> 12) & 0xf) == 0b0010) )
> +				description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64pfr0_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SVE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SVE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64pfr0_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Secure EL2 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "Secure EL2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64pfr0_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
> +				description = "FEAT_MPAM not implemented.";
> +			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
> +				description = "FEAT_MPAM v0.1 implemented.";
> +			break;
> +		case 0b0001:
> +			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
> +				description = "FEAT_MPAM v1.0 implemented.";
> +			if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
> +				description = "FEAT_MPAM v1.1 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64pfr0_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_AMU not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_AMUv1 implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_AMUv1p1 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "51:48";
> +	value = (aa64pfr0_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_DIT not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_DIT implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64pfr0_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RME not implemented";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RME implemented";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "59:56";
> +	value = (aa64pfr0_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "no info is FEAT_CSV2 implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_CSV2 implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_CSV2_2 implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_CSV2_3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +	if(value == 0b0001)
> +	{
> +		if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 )
> +		{
> +			print_values("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
> +		}
> +		if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 )
> +		{
> +			print_values("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
> +		}
> +	}
> +
> +	bits = "63:60";
> +	value = (aa64pfr0_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_CSV3 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_CSV3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64pfr1_el1(const UINT64 aa64pfr1_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64PFR1_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = aa64pfr1_el1 & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_BTI not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_BTI implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64pfr1_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SSBS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SSBS implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_SSBS2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64pfr1_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_MTE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_MTE implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_MTE2 implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_MTE3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 15:12 is RAS_frac
> +	// 19:16 is MPAM_frac
> +	// 23:20 is reserved
> +
> +	bits = "27:24";
> +	value = (aa64pfr1_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SME not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SME implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64pfr1_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RNG_TRAP not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RNG_TRAP implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 35:32 is CSV2_frac
> +
> +	bits = "39:36";
> +	value = (aa64pfr1_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_NMI not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_NMI implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 63:40 are reserved
> +}
> +
> +void handle_aa64isar0_el1(const UINT64 aa64isar0_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64ISAR0_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	// 3:0 reserved
> +
> +	bits = "7:4 ";
> +	value = (aa64isar0_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_AES, FEAT_PMULL not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_AES implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_AES and FEAT_PMULL implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64isar0_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SHA1 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SHA1 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64isar0_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SHA256 implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_SHA512 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64isar0_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "CRC32 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "CRC32 instructions implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64isar0_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LSE not implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_LSE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64isar0_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "TME instructions not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "TME instructions implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64isar0_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RDM not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RDM implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64isar0_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SHA3 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SHA3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64isar0_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SM3 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SM3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64isar0_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SM4 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SM4 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64isar0_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_DotProd not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_DotProd implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +
> +	bits = "51:48";
> +	value = (aa64isar0_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_FHM not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_FHM implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64isar0_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_FlagM implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_FlagM2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "59:56";
> +	value = (aa64isar0_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TLBIOS implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_TLBIRANGE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "63:60";
> +	value = (aa64isar0_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RNG not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RNG implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64isar1_el1(const UINT64 aa64isar1_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64ISAR1_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = (aa64isar1_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "DC CVAP not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_DPB implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_DPB2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64isar1_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Address Authentication (APA) not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PAuth implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_EPAC implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_PAuth2 implemented.";
> +			break;
> +		case 0b0100:
> +			description = "FEAT_FPAC implemented.";
> +			break;
> +		case 0b0101:
> +			description = "FEAT_FPACCOMBINE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +	if(value > 0)
> +		print_text("", "", "", "FEAT_PACQARMA5 implemented.");
> +
> +	bits = "11:8 ";
> +	value = (aa64isar1_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Address Authentication (API) not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PAuth implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_EPAC implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_PAuth2 implemented.";
> +			break;
> +		case 0b0100:
> +			description = "FEAT_FPAC implemented.";
> +			break;
> +		case 0b0101:
> +			description = "FEAT_FPACCOMBINE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +	if(value > 0)
> +		print_text("", "", "", "FEAT_PACIMP implemented.");
> +
> +	bits = "15:12";
> +	value = (aa64isar1_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_JSCVT not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_JSCVT implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64isar1_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_FCMA not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_FCMA implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64isar1_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LRCPC(2) not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LRCPC implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_LRCPC2 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64isar1_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_PACQARMA5 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PACQARMA5 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "31:28";
> +	value = (aa64isar1_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_PACIMP not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PACIMP implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64isar1_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_FRINTTS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_FRINTTS implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64isar1_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SB not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SB implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64isar1_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SPECRES not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SPECRES implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64isar1_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_BF16 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_BF16 implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_EBF16 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +
> +	bits = "51:48";
> +	value = (aa64isar1_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_DGH not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_DGH implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64isar1_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_I8MM not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_I8MM implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "59:56";
> +	value = (aa64isar1_el1 >> 56) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_XS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_XS implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "63:60";
> +	value = (aa64isar1_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_LS64 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_LS64 implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_LS64_V implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_LS64_ACCDATA implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64isar2_el1(const UINT64 aa64isar2_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64ISAR2_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = (aa64isar2_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_WFxT not implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_WFxT implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64isar2_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_RPRES not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_RPRES implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64isar2_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_PACQARMA3 not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PACQARMA3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64isar2_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Address Authentication (APA3) not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PAuth implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_EPAC implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_PAuth2 implemented.";
> +			break;
> +		case 0b0100:
> +			description = "FEAT_FPAC implemented.";
> +			break;
> +		case 0b0101:
> +			description = "FEAT_FPACCOMBINE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "19:16";
> +	value = (aa64isar2_el1 >> 16) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_MOPS not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_MOPS implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "23:20";
> +	value = (aa64isar2_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_HBC not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_HBC implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "27:24";
> +	value = (aa64isar2_el1 >> 24) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_CONSTPACFIELD not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_CONSTPACFIELD implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 63:28 reserved
> +}
> +
> +void handle_aa64dfr0_el1(const UINT64 aa64dfr0_el1)
> +{
> +	UINT64 value;
> +	char* regname = "ID_AA64DFR0_EL1";
> +	char* description;
> +	char* bits;
> +
> +
> +	bits = "3:0 ";
> +	value = (aa64dfr0_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0110:
> +			description = "Armv8 debug architecture";
> +			break;
> +		case 0b0111:
> +			description = "Armv8 debug architecture with VHE";
> +			break;
> +		case 0b1000:
> +			description = "FEAT_Debugv8p2 implemented.";
> +			break;
> +		case 0b1001:
> +			description = "FEAT_Debugv8p4 implemented.";
> +			break;
> +		case 0b1010:
> +			description = "FEAT_Debugv8p8 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "7:4 ";
> +	value = (aa64dfr0_el1 >>  4) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Trace unit System registers not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "Trace unit System registers implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "11:8 ";
> +	value = (aa64dfr0_el1 >>  8) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Performance Monitors Extension not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_PMUv3 implemented.";
> +			break;
> +		case 0b0100:
> +			description = "FEAT_PMUv3p1 implemented.";
> +			break;
> +		case 0b0101:
> +			description = "FEAT_PMUv3p4 implemented.";
> +			break;
> +		case 0b0110:
> +			description = "FEAT_PMUv3p5 implemented.";
> +			break;
> +		case 0b0111:
> +			description = "FEAT_PMUv3p7 implemented.";
> +			break;
> +		case 0b1000:
> +			description = "FEAT_PMUv3p8 implemented.";
> +			break;
> +		case 0b1111:
> +			description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "15:12";
> +	value = (aa64dfr0_el1 >> 12) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "reserved";
> +			break;
> +		default:
> +			description = "Number of breakpoints, minus 1.";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 19:16 reserved
> +
> +	bits = "23:20";
> +	value = (aa64dfr0_el1 >> 20) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "reserved";
> +			break;
> +		default:
> +			description = "Number of watchpoints, minus 1.";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 27:24 reserved
> +
> +	bits = "31:28";
> +	value = (aa64dfr0_el1 >> 28) & 0xf;
> +	switch(value)
> +	{
> +		default:
> +			description = "Number of breakpoints that are context-aware, minus 1.";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "35:32";
> +	value = (aa64dfr0_el1 >> 32) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_SPE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_SPE implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_SPEv1p1 implemented.";
> +			break;
> +		case 0b0011:
> +			description = "FEAT_SPEv1p2 implemented.";
> +			break;
> +		case 0b0100:
> +			description = "FEAT_SPEv1p3 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "39:36";
> +	value = (aa64dfr0_el1 >> 36) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_DoubleLock implemented.";
> +			break;
> +		case 0b1111:
> +			description = "FEAT_DoubleLock not implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "43:40";
> +	value = (aa64dfr0_el1 >> 40) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TRF not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TRF implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "47:44";
> +	value = (aa64dfr0_el1 >> 44) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_TRBE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_TRBE implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +
> +	bits = "51:48";
> +	value = (aa64dfr0_el1 >> 48) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_MTPMU not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
> +			break;
> +		case 0b1111:
> +			description = "FEAT_MTPMU not implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	bits = "55:52";
> +	value = (aa64dfr0_el1 >> 52) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "FEAT_BRBE not implemented.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_BRBE implemented.";
> +			break;
> +		case 0b0010:
> +			description = "FEAT_BRBEv1p1 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +
> +	// 59:56 reserved
> +
> +	bits = "63:60";
> +	value = (aa64dfr0_el1 >> 60) & 0xf;
> +	switch(value)
> +	{
> +		case 0b0000:
> +			description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
> +			break;
> +		case 0b0001:
> +			description = "FEAT_HPMN0 implemented.";
> +			break;
> +		default:
> +			description = "unknown";
> +			break;
> +	}
> +	print_values(regname, bits, value, description);
> +}
> +
> +EFI_STATUS
> +	EFIAPI
> +UefiMain (
> +		IN EFI_HANDLE        ImageHandle,
> +		IN EFI_SYSTEM_TABLE  *SystemTable
> +	 )
> +{
> +	UINT64 aa64dfr0_el1 = read_aa64dfr0_el1();
> +	UINT64 aa64dfr1_el1 = read_aa64dfr1_el1();
> +	UINT64 aa64isar0_el1 = read_aa64isar0_el1();
> +	UINT64 aa64isar1_el1 = read_aa64isar1_el1();
> +	UINT64 aa64isar2_el1 = read_aa64isar2_el1();
> +	UINT64 aa64mmfr0_el1 = read_aa64mmfr0_el1();
> +	UINT64 aa64mmfr1_el1 = read_aa64mmfr1_el1();
> +	UINT64 aa64mmfr2_el1 = read_aa64mmfr2_el1();
> +	UINT64 aa64pfr0_el1 = read_aa64pfr0_el1();
> +	UINT64 aa64pfr1_el1 = read_aa64pfr1_el1();
> +/*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1();*/
> +/*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1();*/
> +
> +	AsciiPrint("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
> +	AsciiPrint("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
> +	AsciiPrint("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
> +	AsciiPrint("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
> +	AsciiPrint("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
> +	AsciiPrint("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
> +	AsciiPrint("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
> +	AsciiPrint("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
> +	AsciiPrint("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
> +	AsciiPrint("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);	// ignore
> +/*    AsciiPrint("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
> +/*    AsciiPrint("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
> +
> +	AsciiPrint("\n");
> +	print_text("Register", "Bits", "Value", "Feature");
> +	print_spacer();
> +
> +	handle_aa64mmfr0_el1(aa64mmfr0_el1);
> +	print_spacer();
> +	handle_aa64mmfr1_el1(aa64mmfr1_el1, aa64pfr0_el1);
> +	print_spacer();
> +	handle_aa64mmfr2_el1(aa64mmfr2_el1);
> +
> +	print_spacer();
> +	handle_aa64pfr0_el1(aa64pfr0_el1, aa64pfr1_el1);
> +	print_spacer();
> +	handle_aa64pfr1_el1(aa64pfr1_el1);
> +
> +	print_spacer();
> +	handle_aa64isar0_el1(aa64isar0_el1);
> +	print_spacer();
> +	handle_aa64isar1_el1(aa64isar1_el1);
> +	print_spacer();
> +	handle_aa64isar2_el1(aa64isar2_el1);
> +
> +	print_spacer();
> +	handle_aa64dfr0_el1(aa64dfr0_el1);
> +
> +	return EFI_SUCCESS;
> +}
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> new file mode 100644
> index 0000000000..aa4a1ea148
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> @@ -0,0 +1,38 @@
> +## @file
> +#
> +#  Attempt to have AArch64 cpu information.
> +#
> +#  Based on HelloWorld:
> +#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
> +#  Copyright (c) 2023 Marcin Juszkiewicz
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION                    = 0x00010019
> +  BASE_NAME                      = ArmCpuInfo
> +  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
> +  MODULE_TYPE                    = UEFI_APPLICATION
> +  VERSION_STRING                 = 1.0
> +  ENTRY_POINT                    = UefiMain
> +
> +#
> +#  This flag specifies whether HII resource section is generated into PE image.
> +#
> +  UEFI_HII_RESOURCE_SECTION      = TRUE
> +
> +[Sources]
> +  ArmCpuInfo.c
> +  readregs.s
> +
> +[Packages]
> +  ArmPkg/ArmPkg.dec
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +
> +[LibraryClasses]
> +  UefiApplicationEntryPoint
> +  UefiLib
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/readargs.h b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
> new file mode 100644
> index 0000000000..eaa52cf161
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
> @@ -0,0 +1,12 @@
> +UINT64 read_aa64pfr0_el1(void);
> +UINT64 read_aa64pfr1_el1(void);
> +UINT64 read_aa64dfr0_el1(void);
> +UINT64 read_aa64dfr1_el1(void);
> +UINT64 read_aa64isar0_el1(void);
> +UINT64 read_aa64isar1_el1(void);
> +UINT64 read_aa64isar2_el1(void);
> +UINT64 read_aa64mmfr0_el1(void);
> +UINT64 read_aa64mmfr1_el1(void);
> +UINT64 read_aa64mmfr2_el1(void);
> +UINT64 read_aa64smfr0_el1(void);
> +UINT64 read_aa64zfr0_el1(void);
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/readregs.s b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
> new file mode 100644
> index 0000000000..19312f1e27
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
> @@ -0,0 +1,49 @@
> +#include <AsmMacroIoLibV8.h>
> +
> +ASM_FUNC(read_aa64pfr0_el1)
> +	mrs x0, ID_AA64PFR0_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64pfr1_el1)
> +	mrs x0, ID_AA64PFR1_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64dfr0_el1)
> +	mrs x0, ID_AA64DFR0_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64dfr1_el1)
> +	mrs x0, ID_AA64DFR1_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64isar0_el1)
> +	mrs x0, ID_AA64ISAR0_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64isar1_el1)
> +	mrs x0, ID_AA64ISAR1_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64isar2_el1)
> +	mrs x0, ID_AA64ISAR2_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64mmfr0_el1)
> +	mrs x0, ID_AA64MMFR0_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64mmfr1_el1)
> +	mrs x0, ID_AA64MMFR1_EL1;
> +	ret;
> +
> +ASM_FUNC(read_aa64mmfr2_el1)
> +	mrs x0, ID_AA64MMFR2_EL1;
> +	ret;
> +
> +# ASM_FUNC(read_aa64zfr0_el1)
> +#     mrs x0, ID_AA64ZFR0_EL1;
> +#     ret;
> +
> +# ASM_FUNC(read_aa64smfr0_el1)
> +#     mrs x0, ID_AA64SMFR0_EL1;
> +#     ret;
> diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
> index 1014598f31..1ecfb34515 100644
> --- a/MdeModulePkg/MdeModulePkg.dsc
> +++ b/MdeModulePkg/MdeModulePkg.dsc
> @@ -216,6 +216,7 @@
>     gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"FVMAIN.FV"
>   
>   [Components]
> +  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
>     MdeModulePkg/Application/HelloWorld/HelloWorld.inf
>     MdeModulePkg/Application/DumpDynPcd/DumpDynPcd.inf
>     MdeModulePkg/Application/MemoryProfileInfo/MemoryProfileInfo.inf
> @@ -520,4 +521,4 @@
>     MdeModulePkg/Universal/CapsulePei/CapsuleX64.inf
>   
>   [BuildOptions]
> -
> +GCC:*_*_AARCH64_CC_FLAGS = -march=armv9-a


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102629): https://edk2.groups.io/g/devel/message/102629
Mute This Topic: https://groups.io/mt/97979062/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-


[edk2-devel] [PATCH v2] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
App goes through ID_AA64*_EL1 system registers and decode their values.

First version which does not use much of current AArch64 support code
present in EDK2. Written to check what data is there and what can be
done with it.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
 MdeModulePkg/MdeModulePkg.dsc                      |    3 +-
 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
 MdeModulePkg/Application/ArmCpuInfo/readargs.h     |   12 +
 MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2274 ++++++++++++++++++++
 MdeModulePkg/Application/ArmCpuInfo/readregs.s     |   49 +
 5 files changed, 2375 insertions(+), 1 deletion(-)

diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
index 1014598f31c3..1ecfb345159f 100644
--- a/MdeModulePkg/MdeModulePkg.dsc
+++ b/MdeModulePkg/MdeModulePkg.dsc
@@ -216,6 +216,7 @@ [PcdsDynamicExDefault]
   gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"FVMAIN.FV"
 
 [Components]
+  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
   MdeModulePkg/Application/HelloWorld/HelloWorld.inf
   MdeModulePkg/Application/DumpDynPcd/DumpDynPcd.inf
   MdeModulePkg/Application/MemoryProfileInfo/MemoryProfileInfo.inf
@@ -520,4 +521,4 @@ [Components.X64]
   MdeModulePkg/Universal/CapsulePei/CapsuleX64.inf
 
 [BuildOptions]
-
+GCC:*_*_AARCH64_CC_FLAGS = -march=armv9-a
diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
new file mode 100644
index 000000000000..158f86a4740c
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
@@ -0,0 +1,38 @@
+## @file
+#
+#  Attempt to have AArch64 cpu information.
+#
+#  Based on HelloWorld:
+#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
+#  Copyright (c) 2023 Marcin Juszkiewicz
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010019
+  BASE_NAME                      = ArmCpuInfo
+  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = UefiMain
+
+#
+#  This flag specifies whether HII resource section is generated into PE image.
+#
+  UEFI_HII_RESOURCE_SECTION      = TRUE
+
+[Sources]
+  ArmCpuInfo.c
+  readregs.s
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  UefiApplicationEntryPoint
+  UefiLib
diff --git a/MdeModulePkg/Application/ArmCpuInfo/readargs.h b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
new file mode 100644
index 000000000000..eaa52cf16145
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
@@ -0,0 +1,12 @@
+UINT64 read_aa64pfr0_el1(void);
+UINT64 read_aa64pfr1_el1(void);
+UINT64 read_aa64dfr0_el1(void);
+UINT64 read_aa64dfr1_el1(void);
+UINT64 read_aa64isar0_el1(void);
+UINT64 read_aa64isar1_el1(void);
+UINT64 read_aa64isar2_el1(void);
+UINT64 read_aa64mmfr0_el1(void);
+UINT64 read_aa64mmfr1_el1(void);
+UINT64 read_aa64mmfr2_el1(void);
+UINT64 read_aa64smfr0_el1(void);
+UINT64 read_aa64zfr0_el1(void);
diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
new file mode 100644
index 000000000000..ac27902e3533
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
@@ -0,0 +1,2274 @@
+/** @file
+
+  Copyright (c) 2023 Marcin Juszkiewicz
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <Library/UefiLib.h>
+#include "readargs.h"
+
+
+void print_text(const char* field, const char* bits, const char* value, const char* description)
+{
+        AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, value, description);
+}
+
+void print_values(const char* field, const char* bits, const int value, const char* description)
+{
+        char binaries[17][5] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
+                                "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};
+
+        AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, binaries[value], description);
+}
+
+void print_spacer(void)
+{
+        AsciiPrint("------------------|-------|-------|----------------------------------------------\n");
+}
+
+void handle_aa64mmfr0_el1(const UINT64 aa64mmfr0_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64MMFR0_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = aa64mmfr0_el1 & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "32 bits (4GB) of physical address range supported.";
+                        break;
+                case 0b0001:
+                        description = "36 bits (64GB) of physical address range supported.";
+                        break;
+                case 0b0010:
+                        description = "40 bits (1TB) of physical address range supported.";
+                        break;
+                case 0b0011:
+                        description = "42 bits (4TB) of physical address range supported.";
+                        break;
+                case 0b0100:
+                        description = "44 bits (16TB) of physical address range supported.";
+                        break;
+                case 0b0101:
+                        description = "48 bits (256TB) of physical address range supported.";
+                        break;
+                case 0b0110:
+                        description = "52 bits (4PB) of physical address range supported.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+        if(value == 0b0110)
+                print_text("", "", "", "FEAT_LPA implemented.");
+
+
+        bits = "7:4 ";
+        value = (aa64mmfr0_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "ASID: 8 bits";
+                        break;
+                case 0b0010:
+                        description = "ASID: 16 bits";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64mmfr0_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "No mixed-endian support.";
+                        break;
+                case 0b0001:
+                        description = "Mixed-endian support.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // only valid for BigEnd != 0b0000
+        if( ((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 )
+        {
+                if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 )
+                {
+                                print_values("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
+                }
+                if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 )
+                {
+                                print_values("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
+                }
+        }
+
+        bits = "15:12";
+        value = (aa64mmfr0_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "No support for a distinction between Secure and Non-Secure Memory.";
+                        break;
+                case 0b0001:
+                        description = "Supports a distinction between Secure and Non-Secure Memory.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64mmfr0_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = " 4KB granule supported.";
+                        break;
+                case 0b1111:
+                        description = " 4KB granule not supported.";
+                        break;
+                case 0b0001: // add FEAT_LPA2 check
+                        description = " 4KB granule supported for 52-bit address.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64mmfr0_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0001:
+                        description = " 4KB granule not supported at stage 2.";
+                        break;
+                case 0b0010:
+                        description = " 4KB granule supported at stage 2.";
+                        break;
+                case 0b0011:
+                        description = " 4KB granule supported at stage 2 for 52-bit address.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64mmfr0_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "16KB granule not supported.";
+                        break;
+                case 0b0001:
+                        description = "16KB granule supported.";
+                        break;
+                case 0b0010: // add FEAT_LPA2 check
+                        description = "16KB granule supported for 52-bit address.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64mmfr0_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0001:
+                        description = "16KB granule not supported at stage 2.";
+                        break;
+                case 0b0010:
+                        description = "16KB granule supported at stage 2.";
+                        break;
+                case 0b0011:
+                        description = "16KB granule supported at stage 2 for 52-bit address.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64mmfr0_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "64KB granule supported.";
+                        break;
+                case 0b1111:
+                        description = "64KB granule not supported.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64mmfr0_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0001:
+                        description = "64KB granule not supported at stage 2.";
+                        break;
+                case 0b0010:
+                        description = "64KB granule supported at stage 2.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64mmfr0_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_ExS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_ExS implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 55:48 reserved
+
+        bits = "59:56";
+        value = (aa64mmfr0_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_FGT not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_FGT implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "63:60";
+        value = (aa64mmfr0_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_ECV not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_ECV implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_ECV implemented with extras.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+void handle_aa64mmfr1_el1(const UINT64 aa64mmfr1_el1, const UINT64 aa64pfr0_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64MMFR1_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = aa64mmfr1_el1 & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_HAFDBS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_HAFDBS implemented without dirty status support.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_HAFDBS implemented with dirty status support.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64mmfr1_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_VMID16 not implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_VMID16 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64mmfr1_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_VHE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_VHE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64mmfr1_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_HPDS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_HPDS implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_HPDS2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64mmfr1_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LOR not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LOR implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64mmfr1_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_PAN not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PAN implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_PAN2 implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_PAN3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // when FEAT_RAS implemented
+        if( (((aa64pfr0_el1 >> 28) & 0xf) == 0b0001 ) ||
+            (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010 ))
+        {
+                if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 )
+                {
+                                print_values("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
+                                print_text("", "", "", "an External abort on a speculative read.");
+                }
+                if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 )
+                {
+                                print_values("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
+                                print_text("", "", "", "an External abort on a speculative read.");
+                }
+        }
+
+        bits = "31:28";
+        value = (aa64mmfr1_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_XNX not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_XNX implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64mmfr1_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TWED not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TWED implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64mmfr1_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_ETS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_ETS implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64mmfr1_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_HCX not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_HCX implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64mmfr1_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_AFP not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_AFP implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "51:48";
+        value = (aa64mmfr1_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_nTLBPA not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_nTLBPA implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64mmfr1_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TIDCP1 not implemented";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TIDCP1 implemented";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "59:56";
+        value = (aa64mmfr1_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_CMOW not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_CMOW implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 63:60 reserved
+}
+
+void handle_aa64mmfr2_el1(const UINT64 aa64mmfr2_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64MMFR2_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = (aa64mmfr2_el1)       & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TTCNP not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TTCNP implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64mmfr2_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_UAO not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_UAO implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64mmfr2_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LSMAOC not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LSMAOC implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64mmfr2_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_IESB not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_IESB implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64mmfr2_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LVA not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LVA implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64mmfr2_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_CCIDX not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_CCIDX implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64mmfr2_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_NV not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_NV implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_NV2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64mmfr2_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TTST not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TTST implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64mmfr2_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LSE2 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LSE2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64mmfr2_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_IDST not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_IDST implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64mmfr2_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_S2FWB not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_S2FWB implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 47:44 reserved
+
+        bits = "51:48";
+        value = (aa64mmfr2_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TTL not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TTL implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64mmfr2_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_BBM: Level 0 support for changing block size is supported.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_BBM: Level 1 support for changing block size is supported.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_BBM: Level 2 support for changing block size is supported.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "59:56";
+        value = (aa64mmfr2_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_EVT not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "63:60";
+        value = (aa64mmfr2_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_E0PD not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_E0PD implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+void handle_aa64pfr0_el1(const UINT64 aa64pfr0_el1, const UINT64 aa64pfr1_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64PFR0_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = (aa64pfr0_el1)       & 0xf;
+        switch(value)
+        {
+                case 0b0001:
+                        description = "EL0 in AArch64 only";
+                        break;
+                case 0b0010:
+                        description = "EL0 in AArch64 and AArch32";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64pfr0_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0001:
+                        description = "EL1 in AArch64 only";
+                        break;
+                case 0b0010:
+                        description = "EL1 in AArch64 and AArch32";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64pfr0_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "EL2 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "EL2 in AArch64 only";
+                        break;
+                case 0b0010:
+                        description = "EL2 in AArch64 and AArch32";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64pfr0_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "EL3 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "EL3 in AArch64 only";
+                        break;
+                case 0b0010:
+                        description = "EL3 in AArch64 and AArch32";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64pfr0_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Floating-point implemented.";
+                        break;
+                case 0b0001:
+                        description = "Floating-point with half-precision support (FEAT_FP16).";
+                        break;
+                case 0b1111:
+                        description = "Floating-point not implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64pfr0_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Advanced SIMD implemented.";
+                        break;
+                case 0b0001:
+                        description = "Advanced SIMD with half precision support (FEAT_FP16).";
+                        break;
+                case 0b1111:
+                        description = "Advanced SIMD not implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64pfr0_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "System registers of GIC CPU not implemented.";
+                        break;
+                case 0b0001:
+                        description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
+                        break;
+                case 0b0011:
+                        description = "System registers to versions 4.1 of GIC CPU implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64pfr0_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RAS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RAS implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_RASv1p1 implemented.";
+                        // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented. 
+                        if( (((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
+                                (((aa64pfr0_el1 >> 12) & 0xf) == 0b0010) )
+                                description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64pfr0_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SVE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SVE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64pfr0_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Secure EL2 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "Secure EL2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64pfr0_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
+                                description = "FEAT_MPAM not implemented.";
+                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
+                                description = "FEAT_MPAM v0.1 implemented.";
+                        break;
+                case 0b0001:
+                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
+                                description = "FEAT_MPAM v1.0 implemented.";
+                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
+                                description = "FEAT_MPAM v1.1 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64pfr0_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_AMU not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_AMUv1 implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_AMUv1p1 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "51:48";
+        value = (aa64pfr0_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_DIT not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_DIT implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64pfr0_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RME not implemented";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RME implemented";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "59:56";
+        value = (aa64pfr0_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "no info is FEAT_CSV2 implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_CSV2 implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_CSV2_2 implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_CSV2_3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+        if(value == 0b0001)
+        {
+                if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 )
+                {
+                        print_values("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
+                }
+                if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 )
+                {
+                        print_values("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
+                }
+        }
+
+        bits = "63:60";
+        value = (aa64pfr0_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_CSV3 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_CSV3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+void handle_aa64pfr1_el1(const UINT64 aa64pfr1_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64PFR1_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = aa64pfr1_el1 & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_BTI not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_BTI implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64pfr1_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SSBS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SSBS implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_SSBS2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64pfr1_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_MTE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_MTE implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_MTE2 implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_MTE3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 15:12 is RAS_frac
+        // 19:16 is MPAM_frac
+        // 23:20 is reserved
+
+        bits = "27:24";
+        value = (aa64pfr1_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SME not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SME implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64pfr1_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RNG_TRAP not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RNG_TRAP implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 35:32 is CSV2_frac
+
+        bits = "39:36";
+        value = (aa64pfr1_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_NMI not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_NMI implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 63:40 are reserved
+}
+
+void handle_aa64isar0_el1(const UINT64 aa64isar0_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64ISAR0_EL1";
+        char* description;
+        char* bits;
+
+
+        // 3:0 reserved
+
+        bits = "7:4 ";
+        value = (aa64isar0_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_AES, FEAT_PMULL not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_AES implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_AES and FEAT_PMULL implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64isar0_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SHA1 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SHA1 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64isar0_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SHA256 implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_SHA512 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64isar0_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "CRC32 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "CRC32 instructions implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64isar0_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LSE not implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_LSE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64isar0_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "TME instructions not implemented.";
+                        break;
+                case 0b0001:
+                        description = "TME instructions implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64isar0_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RDM not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RDM implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64isar0_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SHA3 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SHA3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64isar0_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SM3 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SM3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64isar0_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SM4 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SM4 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64isar0_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_DotProd not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_DotProd implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+
+        bits = "51:48";
+        value = (aa64isar0_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_FHM not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_FHM implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64isar0_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_FlagM implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_FlagM2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "59:56";
+        value = (aa64isar0_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TLBIOS implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_TLBIRANGE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "63:60";
+        value = (aa64isar0_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RNG not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RNG implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+void handle_aa64isar1_el1(const UINT64 aa64isar1_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64ISAR1_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = (aa64isar1_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "DC CVAP not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_DPB implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_DPB2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64isar1_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Address Authentication (APA) not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PAuth implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_EPAC implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_PAuth2 implemented.";
+                        break;
+                case 0b0100:
+                        description = "FEAT_FPAC implemented.";
+                        break;
+                case 0b0101:
+                        description = "FEAT_FPACCOMBINE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+        if(value > 0)
+                print_text("", "", "", "FEAT_PACQARMA5 implemented.");
+
+        bits = "11:8 ";
+        value = (aa64isar1_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Address Authentication (API) not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PAuth implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_EPAC implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_PAuth2 implemented.";
+                        break;
+                case 0b0100:
+                        description = "FEAT_FPAC implemented.";
+                        break;
+                case 0b0101:
+                        description = "FEAT_FPACCOMBINE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+        if(value > 0)
+                print_text("", "", "", "FEAT_PACIMP implemented.");
+
+        bits = "15:12";
+        value = (aa64isar1_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_JSCVT not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_JSCVT implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64isar1_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_FCMA not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_FCMA implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64isar1_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LRCPC(2) not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LRCPC implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_LRCPC2 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64isar1_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_PACQARMA5 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PACQARMA5 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "31:28";
+        value = (aa64isar1_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_PACIMP not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PACIMP implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64isar1_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_FRINTTS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_FRINTTS implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64isar1_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SB not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SB implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64isar1_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SPECRES not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SPECRES implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64isar1_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_BF16 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_BF16 implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_EBF16 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+
+        bits = "51:48";
+        value = (aa64isar1_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_DGH not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_DGH implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64isar1_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_I8MM not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_I8MM implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "59:56";
+        value = (aa64isar1_el1 >> 56) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_XS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_XS implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "63:60";
+        value = (aa64isar1_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_LS64 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_LS64 implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_LS64_V implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_LS64_ACCDATA implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+void handle_aa64isar2_el1(const UINT64 aa64isar2_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64ISAR2_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = (aa64isar2_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_WFxT not implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_WFxT implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64isar2_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_RPRES not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_RPRES implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64isar2_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_PACQARMA3 not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PACQARMA3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64isar2_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Address Authentication (APA3) not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PAuth implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_EPAC implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_PAuth2 implemented.";
+                        break;
+                case 0b0100:
+                        description = "FEAT_FPAC implemented.";
+                        break;
+                case 0b0101:
+                        description = "FEAT_FPACCOMBINE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "19:16";
+        value = (aa64isar2_el1 >> 16) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_MOPS not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_MOPS implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "23:20";
+        value = (aa64isar2_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_HBC not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_HBC implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "27:24";
+        value = (aa64isar2_el1 >> 24) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_CONSTPACFIELD not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_CONSTPACFIELD implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 63:28 reserved
+}
+
+void handle_aa64dfr0_el1(const UINT64 aa64dfr0_el1)
+{
+        UINT64 value;
+        char* regname = "ID_AA64DFR0_EL1";
+        char* description;
+        char* bits;
+
+
+        bits = "3:0 ";
+        value = (aa64dfr0_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0110:
+                        description = "Armv8 debug architecture";
+                        break;
+                case 0b0111:
+                        description = "Armv8 debug architecture with VHE";
+                        break;
+                case 0b1000:
+                        description = "FEAT_Debugv8p2 implemented.";
+                        break;
+                case 0b1001:
+                        description = "FEAT_Debugv8p4 implemented.";
+                        break;
+                case 0b1010:
+                        description = "FEAT_Debugv8p8 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "7:4 ";
+        value = (aa64dfr0_el1 >>  4) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Trace unit System registers not implemented.";
+                        break;
+                case 0b0001:
+                        description = "Trace unit System registers implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "11:8 ";
+        value = (aa64dfr0_el1 >>  8) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Performance Monitors Extension not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_PMUv3 implemented.";
+                        break;
+                case 0b0100:
+                        description = "FEAT_PMUv3p1 implemented.";
+                        break;
+                case 0b0101:
+                        description = "FEAT_PMUv3p4 implemented.";
+                        break;
+                case 0b0110:
+                        description = "FEAT_PMUv3p5 implemented.";
+                        break;
+                case 0b0111:
+                        description = "FEAT_PMUv3p7 implemented.";
+                        break;
+                case 0b1000:
+                        description = "FEAT_PMUv3p8 implemented.";
+                        break;
+                case 0b1111:
+                        description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "15:12";
+        value = (aa64dfr0_el1 >> 12) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "reserved";
+                        break;
+                default:
+                        description = "Number of breakpoints, minus 1.";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 19:16 reserved
+
+        bits = "23:20";
+        value = (aa64dfr0_el1 >> 20) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "reserved";
+                        break;
+                default:
+                        description = "Number of watchpoints, minus 1.";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 27:24 reserved
+
+        bits = "31:28";
+        value = (aa64dfr0_el1 >> 28) & 0xf;
+        switch(value)
+        {
+                default:
+                        description = "Number of breakpoints that are context-aware, minus 1.";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "35:32";
+        value = (aa64dfr0_el1 >> 32) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_SPE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_SPE implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_SPEv1p1 implemented.";
+                        break;
+                case 0b0011:
+                        description = "FEAT_SPEv1p2 implemented.";
+                        break;
+                case 0b0100:
+                        description = "FEAT_SPEv1p3 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "39:36";
+        value = (aa64dfr0_el1 >> 36) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_DoubleLock implemented.";
+                        break;
+                case 0b1111:
+                        description = "FEAT_DoubleLock not implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "43:40";
+        value = (aa64dfr0_el1 >> 40) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TRF not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TRF implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "47:44";
+        value = (aa64dfr0_el1 >> 44) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_TRBE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_TRBE implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+
+        bits = "51:48";
+        value = (aa64dfr0_el1 >> 48) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_MTPMU not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
+                        break;
+                case 0b1111:
+                        description = "FEAT_MTPMU not implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        bits = "55:52";
+        value = (aa64dfr0_el1 >> 52) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "FEAT_BRBE not implemented.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_BRBE implemented.";
+                        break;
+                case 0b0010:
+                        description = "FEAT_BRBEv1p1 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+
+        // 59:56 reserved
+
+        bits = "63:60";
+        value = (aa64dfr0_el1 >> 60) & 0xf;
+        switch(value)
+        {
+                case 0b0000:
+                        description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
+                        break;
+                case 0b0001:
+                        description = "FEAT_HPMN0 implemented.";
+                        break;
+                default:
+                        description = "unknown";
+                        break;
+        }
+        print_values(regname, bits, value, description);
+}
+
+EFI_STATUS
+        EFIAPI
+UefiMain (
+                IN EFI_HANDLE        ImageHandle,
+                IN EFI_SYSTEM_TABLE  *SystemTable
+         )
+{
+        UINT64 aa64dfr0_el1 = read_aa64dfr0_el1();
+        UINT64 aa64dfr1_el1 = read_aa64dfr1_el1();
+        UINT64 aa64isar0_el1 = read_aa64isar0_el1();
+        UINT64 aa64isar1_el1 = read_aa64isar1_el1();
+        UINT64 aa64isar2_el1 = read_aa64isar2_el1();
+        UINT64 aa64mmfr0_el1 = read_aa64mmfr0_el1();
+        UINT64 aa64mmfr1_el1 = read_aa64mmfr1_el1();
+        UINT64 aa64mmfr2_el1 = read_aa64mmfr2_el1();
+        UINT64 aa64pfr0_el1 = read_aa64pfr0_el1();
+        UINT64 aa64pfr1_el1 = read_aa64pfr1_el1();
+/*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1();*/
+/*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1();*/
+
+        AsciiPrint("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
+        AsciiPrint("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
+        AsciiPrint("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
+        AsciiPrint("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
+        AsciiPrint("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
+        AsciiPrint("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
+        AsciiPrint("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
+        AsciiPrint("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
+        AsciiPrint("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
+        AsciiPrint("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);      // ignore
+/*    AsciiPrint("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
+/*    AsciiPrint("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
+
+        AsciiPrint("\n");
+        print_text("Register", "Bits", "Value", "Feature");
+        print_spacer();
+
+        handle_aa64mmfr0_el1(aa64mmfr0_el1);
+        print_spacer();
+        handle_aa64mmfr1_el1(aa64mmfr1_el1, aa64pfr0_el1);
+        print_spacer();
+        handle_aa64mmfr2_el1(aa64mmfr2_el1);
+
+        print_spacer();
+        handle_aa64pfr0_el1(aa64pfr0_el1, aa64pfr1_el1);
+        print_spacer();
+        handle_aa64pfr1_el1(aa64pfr1_el1);
+
+        print_spacer();
+        handle_aa64isar0_el1(aa64isar0_el1);
+        print_spacer();
+        handle_aa64isar1_el1(aa64isar1_el1);
+        print_spacer();
+        handle_aa64isar2_el1(aa64isar2_el1);
+
+        print_spacer();
+        handle_aa64dfr0_el1(aa64dfr0_el1);
+
+        return EFI_SUCCESS;
+}
diff --git a/MdeModulePkg/Application/ArmCpuInfo/readregs.s b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
new file mode 100644
index 000000000000..052834b3c3f2
--- /dev/null
+++ b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
@@ -0,0 +1,49 @@
+#include <AsmMacroIoLibV8.h>
+
+ASM_FUNC(read_aa64pfr0_el1)
+        mrs x0, ID_AA64PFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64pfr1_el1)
+        mrs x0, ID_AA64PFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64dfr0_el1)
+        mrs x0, ID_AA64DFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64dfr1_el1)
+        mrs x0, ID_AA64DFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar0_el1)
+        mrs x0, ID_AA64ISAR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar1_el1)
+        mrs x0, ID_AA64ISAR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar2_el1)
+        mrs x0, ID_AA64ISAR2_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr0_el1)
+        mrs x0, ID_AA64MMFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr1_el1)
+        mrs x0, ID_AA64MMFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr2_el1)
+        mrs x0, ID_AA64MMFR2_EL1;
+        ret;
+
+# ASM_FUNC(read_aa64zfr0_el1)
+#     mrs x0, ID_AA64ZFR0_EL1;
+#     ret;
+
+# ASM_FUNC(read_aa64smfr0_el1)
+#     mrs x0, ID_AA64SMFR0_EL1;
+#     ret;
-- 
2.40.0



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102680): https://edk2.groups.io/g/devel/message/102680
Mute This Topic: https://groups.io/mt/98122223/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v2] add ArmCpuInfo EFI application
Posted by Ard Biesheuvel 1 year ago
Hello Marcin,

Thanks for this - it looks useful.

Some comments below.

On Fri, 7 Apr 2023 at 12:40, Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> App goes through ID_AA64*_EL1 system registers and decode their values.
>
> First version which does not use much of current AArch64 support code
> present in EDK2. Written to check what data is there and what can be
> done with it.
>
> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
> ---
>  MdeModulePkg/MdeModulePkg.dsc                      |    3 +-
>  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
>  MdeModulePkg/Application/ArmCpuInfo/readargs.h     |   12 +
>  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2274 ++++++++++++++++++++
>  MdeModulePkg/Application/ArmCpuInfo/readregs.s     |   49 +
>  5 files changed, 2375 insertions(+), 1 deletion(-)
>

Why are you adding this to MdeModulePkg rather than ArmPkg?


> diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
> index 1014598f31c3..1ecfb345159f 100644
> --- a/MdeModulePkg/MdeModulePkg.dsc
> +++ b/MdeModulePkg/MdeModulePkg.dsc
> @@ -216,6 +216,7 @@ [PcdsDynamicExDefault]
>    gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"FVMAIN.FV"
>
>  [Components]
> +  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
>    MdeModulePkg/Application/HelloWorld/HelloWorld.inf
>    MdeModulePkg/Application/DumpDynPcd/DumpDynPcd.inf
>    MdeModulePkg/Application/MemoryProfileInfo/MemoryProfileInfo.inf
> @@ -520,4 +521,4 @@ [Components.X64]
>    MdeModulePkg/Universal/CapsulePei/CapsuleX64.inf
>
>  [BuildOptions]
> -
> +GCC:*_*_AARCH64_CC_FLAGS = -march=armv9-a

This belongs in the app's INF, not in the package DSC where it affects
code generation for all components, which may need to run on much
older CPUs

> diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> new file mode 100644
> index 000000000000..158f86a4740c
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> @@ -0,0 +1,38 @@
> +## @file
> +#
> +#  Attempt to have AArch64 cpu information.
> +#
> +#  Based on HelloWorld:
> +#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
> +#  Copyright (c) 2023 Marcin Juszkiewicz
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION                    = 0x00010019
> +  BASE_NAME                      = ArmCpuInfo
> +  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
> +  MODULE_TYPE                    = UEFI_APPLICATION
> +  VERSION_STRING                 = 1.0
> +  ENTRY_POINT                    = UefiMain
> +
> +#
> +#  This flag specifies whether HII resource section is generated into PE image.
> +#
> +  UEFI_HII_RESOURCE_SECTION      = TRUE
> +
> +[Sources]
> +  ArmCpuInfo.c
> +  readregs.s
> +
> +[Packages]
> +  ArmPkg/ArmPkg.dec
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +
> +[LibraryClasses]
> +  UefiApplicationEntryPoint
> +  UefiLib
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/readargs.h b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
> new file mode 100644
> index 000000000000..eaa52cf16145
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/readargs.h
> @@ -0,0 +1,12 @@
> +UINT64 read_aa64pfr0_el1(void);
> +UINT64 read_aa64pfr1_el1(void);
> +UINT64 read_aa64dfr0_el1(void);
> +UINT64 read_aa64dfr1_el1(void);
> +UINT64 read_aa64isar0_el1(void);
> +UINT64 read_aa64isar1_el1(void);
> +UINT64 read_aa64isar2_el1(void);
> +UINT64 read_aa64mmfr0_el1(void);
> +UINT64 read_aa64mmfr1_el1(void);
> +UINT64 read_aa64mmfr2_el1(void);
> +UINT64 read_aa64smfr0_el1(void);
> +UINT64 read_aa64zfr0_el1(void);
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
> new file mode 100644
> index 000000000000..ac27902e3533
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
> @@ -0,0 +1,2274 @@
> +/** @file
> +
> +  Copyright (c) 2023 Marcin Juszkiewicz
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> + **/
> +
> +#include <Library/UefiLib.h>
> +#include "readargs.h"
> +
> +
> +void print_text(const char* field, const char* bits, const char* value, const char* description)
> +{
> +        AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, value, description);
> +}
> +
> +void print_values(const char* field, const char* bits, const int value, const char* description)
> +{
> +        char binaries[17][5] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
> +                                "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};
> +

STATIC CONST CHAR8[] please, and you can use [] for the first
dimension (and drop the final element)

> +        AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, binaries[value], description);

This should be value & 0xf so you never access outside of the array.


> +}
> +
> +void print_spacer(void)
> +{
> +        AsciiPrint("------------------|-------|-------|----------------------------------------------\n");
> +}
> +
> +void handle_aa64mmfr0_el1(const UINT64 aa64mmfr0_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64MMFR0_EL1";

STATIC CONST CHAR8 RegName[] = ...

> +        char* description;
> +        char* bits;

CONST

> +
> +
> +        bits = "3:0 ";
> +        value = aa64mmfr0_el1 & 0xf;
> +        switch(value)

Space after switch

> +        {
> +                case 0b0000:
> +                        description = "32 bits (4GB) of physical address range supported.";
> +                        break;
> +                case 0b0001:
> +                        description = "36 bits (64GB) of physical address range supported.";
> +                        break;
> +                case 0b0010:
> +                        description = "40 bits (1TB) of physical address range supported.";
> +                        break;
> +                case 0b0011:
> +                        description = "42 bits (4TB) of physical address range supported.";
> +                        break;
> +                case 0b0100:
> +                        description = "44 bits (16TB) of physical address range supported.";
> +                        break;
> +                case 0b0101:
> +                        description = "48 bits (256TB) of physical address range supported.";
> +                        break;
> +                case 0b0110:
> +                        description = "52 bits (4PB) of physical address range supported.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +        if(value == 0b0110)

Space after if

etc etc

There are some other style issues here, which I am sure the CI will
whine about, so you might want to run uncrustify on it.

Thanks,

> +                print_text("", "", "", "FEAT_LPA implemented.");
> +
> +
> +        bits = "7:4 ";
> +        value = (aa64mmfr0_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "ASID: 8 bits";
> +                        break;
> +                case 0b0010:
> +                        description = "ASID: 16 bits";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64mmfr0_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "No mixed-endian support.";
> +                        break;
> +                case 0b0001:
> +                        description = "Mixed-endian support.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // only valid for BigEnd != 0b0000
> +        if( ((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 )
> +        {
> +                if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 )
> +                {
> +                                print_values("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
> +                }
> +                if( ((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 )
> +                {
> +                                print_values("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
> +                }
> +        }
> +
> +        bits = "15:12";
> +        value = (aa64mmfr0_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "No support for a distinction between Secure and Non-Secure Memory.";
> +                        break;
> +                case 0b0001:
> +                        description = "Supports a distinction between Secure and Non-Secure Memory.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64mmfr0_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = " 4KB granule supported.";
> +                        break;
> +                case 0b1111:
> +                        description = " 4KB granule not supported.";
> +                        break;
> +                case 0b0001: // add FEAT_LPA2 check
> +                        description = " 4KB granule supported for 52-bit address.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64mmfr0_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0001:
> +                        description = " 4KB granule not supported at stage 2.";
> +                        break;
> +                case 0b0010:
> +                        description = " 4KB granule supported at stage 2.";
> +                        break;
> +                case 0b0011:
> +                        description = " 4KB granule supported at stage 2 for 52-bit address.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64mmfr0_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "16KB granule not supported.";
> +                        break;
> +                case 0b0001:
> +                        description = "16KB granule supported.";
> +                        break;
> +                case 0b0010: // add FEAT_LPA2 check
> +                        description = "16KB granule supported for 52-bit address.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64mmfr0_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0001:
> +                        description = "16KB granule not supported at stage 2.";
> +                        break;
> +                case 0b0010:
> +                        description = "16KB granule supported at stage 2.";
> +                        break;
> +                case 0b0011:
> +                        description = "16KB granule supported at stage 2 for 52-bit address.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64mmfr0_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "64KB granule supported.";
> +                        break;
> +                case 0b1111:
> +                        description = "64KB granule not supported.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64mmfr0_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0001:
> +                        description = "64KB granule not supported at stage 2.";
> +                        break;
> +                case 0b0010:
> +                        description = "64KB granule supported at stage 2.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64mmfr0_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_ExS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_ExS implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 55:48 reserved
> +
> +        bits = "59:56";
> +        value = (aa64mmfr0_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_FGT not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_FGT implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "63:60";
> +        value = (aa64mmfr0_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_ECV not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_ECV implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_ECV implemented with extras.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64mmfr1_el1(const UINT64 aa64mmfr1_el1, const UINT64 aa64pfr0_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64MMFR1_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = aa64mmfr1_el1 & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_HAFDBS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_HAFDBS implemented without dirty status support.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_HAFDBS implemented with dirty status support.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64mmfr1_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_VMID16 not implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_VMID16 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64mmfr1_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_VHE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_VHE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64mmfr1_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_HPDS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_HPDS implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_HPDS2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64mmfr1_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LOR not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LOR implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64mmfr1_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_PAN not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PAN implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_PAN2 implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_PAN3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // when FEAT_RAS implemented
> +        if( (((aa64pfr0_el1 >> 28) & 0xf) == 0b0001 ) ||
> +            (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010 ))
> +        {
> +                if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 )
> +                {
> +                                print_values("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
> +                                print_text("", "", "", "an External abort on a speculative read.");
> +                }
> +                if( ((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 )
> +                {
> +                                print_values("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
> +                                print_text("", "", "", "an External abort on a speculative read.");
> +                }
> +        }
> +
> +        bits = "31:28";
> +        value = (aa64mmfr1_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_XNX not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_XNX implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64mmfr1_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TWED not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TWED implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64mmfr1_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_ETS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_ETS implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64mmfr1_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_HCX not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_HCX implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64mmfr1_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_AFP not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_AFP implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "51:48";
> +        value = (aa64mmfr1_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_nTLBPA not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_nTLBPA implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64mmfr1_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TIDCP1 not implemented";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TIDCP1 implemented";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "59:56";
> +        value = (aa64mmfr1_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_CMOW not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_CMOW implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 63:60 reserved
> +}
> +
> +void handle_aa64mmfr2_el1(const UINT64 aa64mmfr2_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64MMFR2_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = (aa64mmfr2_el1)       & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TTCNP not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TTCNP implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64mmfr2_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_UAO not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_UAO implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64mmfr2_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LSMAOC not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LSMAOC implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64mmfr2_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_IESB not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_IESB implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64mmfr2_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LVA not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LVA implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64mmfr2_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_CCIDX not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_CCIDX implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64mmfr2_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_NV not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_NV implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_NV2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64mmfr2_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TTST not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TTST implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64mmfr2_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LSE2 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LSE2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64mmfr2_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_IDST not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_IDST implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64mmfr2_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_S2FWB not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_S2FWB implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 47:44 reserved
> +
> +        bits = "51:48";
> +        value = (aa64mmfr2_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TTL not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TTL implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64mmfr2_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_BBM: Level 0 support for changing block size is supported.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_BBM: Level 1 support for changing block size is supported.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_BBM: Level 2 support for changing block size is supported.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "59:56";
> +        value = (aa64mmfr2_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_EVT not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "63:60";
> +        value = (aa64mmfr2_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_E0PD not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_E0PD implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64pfr0_el1(const UINT64 aa64pfr0_el1, const UINT64 aa64pfr1_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64PFR0_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = (aa64pfr0_el1)       & 0xf;
> +        switch(value)
> +        {
> +                case 0b0001:
> +                        description = "EL0 in AArch64 only";
> +                        break;
> +                case 0b0010:
> +                        description = "EL0 in AArch64 and AArch32";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64pfr0_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0001:
> +                        description = "EL1 in AArch64 only";
> +                        break;
> +                case 0b0010:
> +                        description = "EL1 in AArch64 and AArch32";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64pfr0_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "EL2 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "EL2 in AArch64 only";
> +                        break;
> +                case 0b0010:
> +                        description = "EL2 in AArch64 and AArch32";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64pfr0_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "EL3 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "EL3 in AArch64 only";
> +                        break;
> +                case 0b0010:
> +                        description = "EL3 in AArch64 and AArch32";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64pfr0_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Floating-point implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "Floating-point with half-precision support (FEAT_FP16).";
> +                        break;
> +                case 0b1111:
> +                        description = "Floating-point not implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64pfr0_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Advanced SIMD implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "Advanced SIMD with half precision support (FEAT_FP16).";
> +                        break;
> +                case 0b1111:
> +                        description = "Advanced SIMD not implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64pfr0_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "System registers of GIC CPU not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "System registers to versions 4.1 of GIC CPU implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64pfr0_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RAS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RAS implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_RASv1p1 implemented.";
> +                        // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
> +                        if( (((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
> +                                (((aa64pfr0_el1 >> 12) & 0xf) == 0b0010) )
> +                                description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64pfr0_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SVE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SVE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64pfr0_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Secure EL2 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "Secure EL2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64pfr0_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
> +                                description = "FEAT_MPAM not implemented.";
> +                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
> +                                description = "FEAT_MPAM v0.1 implemented.";
> +                        break;
> +                case 0b0001:
> +                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 )
> +                                description = "FEAT_MPAM v1.0 implemented.";
> +                        if( ((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 )
> +                                description = "FEAT_MPAM v1.1 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64pfr0_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_AMU not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_AMUv1 implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_AMUv1p1 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "51:48";
> +        value = (aa64pfr0_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_DIT not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_DIT implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64pfr0_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RME not implemented";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RME implemented";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "59:56";
> +        value = (aa64pfr0_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "no info is FEAT_CSV2 implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_CSV2 implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_CSV2_2 implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_CSV2_3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +        if(value == 0b0001)
> +        {
> +                if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 )
> +                {
> +                        print_values("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
> +                }
> +                if( ((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 )
> +                {
> +                        print_values("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
> +                }
> +        }
> +
> +        bits = "63:60";
> +        value = (aa64pfr0_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_CSV3 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_CSV3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64pfr1_el1(const UINT64 aa64pfr1_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64PFR1_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = aa64pfr1_el1 & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_BTI not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_BTI implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64pfr1_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SSBS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SSBS implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_SSBS2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64pfr1_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_MTE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_MTE implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_MTE2 implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_MTE3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 15:12 is RAS_frac
> +        // 19:16 is MPAM_frac
> +        // 23:20 is reserved
> +
> +        bits = "27:24";
> +        value = (aa64pfr1_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SME not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SME implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64pfr1_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RNG_TRAP not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RNG_TRAP implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 35:32 is CSV2_frac
> +
> +        bits = "39:36";
> +        value = (aa64pfr1_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_NMI not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_NMI implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 63:40 are reserved
> +}
> +
> +void handle_aa64isar0_el1(const UINT64 aa64isar0_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64ISAR0_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        // 3:0 reserved
> +
> +        bits = "7:4 ";
> +        value = (aa64isar0_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_AES, FEAT_PMULL not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_AES implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_AES and FEAT_PMULL implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64isar0_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SHA1 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SHA1 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64isar0_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SHA256 implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_SHA512 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64isar0_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "CRC32 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "CRC32 instructions implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64isar0_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LSE not implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_LSE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64isar0_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "TME instructions not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "TME instructions implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64isar0_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RDM not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RDM implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64isar0_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SHA3 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SHA3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64isar0_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SM3 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SM3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64isar0_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SM4 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SM4 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64isar0_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_DotProd not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_DotProd implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +
> +        bits = "51:48";
> +        value = (aa64isar0_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_FHM not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_FHM implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64isar0_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_FlagM implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_FlagM2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "59:56";
> +        value = (aa64isar0_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TLBIOS implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_TLBIRANGE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "63:60";
> +        value = (aa64isar0_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RNG not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RNG implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64isar1_el1(const UINT64 aa64isar1_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64ISAR1_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = (aa64isar1_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "DC CVAP not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_DPB implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_DPB2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64isar1_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Address Authentication (APA) not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PAuth implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_EPAC implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_PAuth2 implemented.";
> +                        break;
> +                case 0b0100:
> +                        description = "FEAT_FPAC implemented.";
> +                        break;
> +                case 0b0101:
> +                        description = "FEAT_FPACCOMBINE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +        if(value > 0)
> +                print_text("", "", "", "FEAT_PACQARMA5 implemented.");
> +
> +        bits = "11:8 ";
> +        value = (aa64isar1_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Address Authentication (API) not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PAuth implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_EPAC implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_PAuth2 implemented.";
> +                        break;
> +                case 0b0100:
> +                        description = "FEAT_FPAC implemented.";
> +                        break;
> +                case 0b0101:
> +                        description = "FEAT_FPACCOMBINE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +        if(value > 0)
> +                print_text("", "", "", "FEAT_PACIMP implemented.");
> +
> +        bits = "15:12";
> +        value = (aa64isar1_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_JSCVT not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_JSCVT implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64isar1_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_FCMA not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_FCMA implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64isar1_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LRCPC(2) not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LRCPC implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_LRCPC2 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64isar1_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_PACQARMA5 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PACQARMA5 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "31:28";
> +        value = (aa64isar1_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_PACIMP not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PACIMP implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64isar1_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_FRINTTS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_FRINTTS implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64isar1_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SB not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SB implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64isar1_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SPECRES not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SPECRES implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64isar1_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_BF16 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_BF16 implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_EBF16 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +
> +        bits = "51:48";
> +        value = (aa64isar1_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_DGH not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_DGH implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64isar1_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_I8MM not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_I8MM implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "59:56";
> +        value = (aa64isar1_el1 >> 56) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_XS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_XS implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "63:60";
> +        value = (aa64isar1_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_LS64 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_LS64 implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_LS64_V implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_LS64_ACCDATA implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +void handle_aa64isar2_el1(const UINT64 aa64isar2_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64ISAR2_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = (aa64isar2_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_WFxT not implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_WFxT implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64isar2_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_RPRES not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_RPRES implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64isar2_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_PACQARMA3 not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PACQARMA3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64isar2_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Address Authentication (APA3) not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PAuth implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_EPAC implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_PAuth2 implemented.";
> +                        break;
> +                case 0b0100:
> +                        description = "FEAT_FPAC implemented.";
> +                        break;
> +                case 0b0101:
> +                        description = "FEAT_FPACCOMBINE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "19:16";
> +        value = (aa64isar2_el1 >> 16) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_MOPS not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_MOPS implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "23:20";
> +        value = (aa64isar2_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_HBC not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_HBC implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "27:24";
> +        value = (aa64isar2_el1 >> 24) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_CONSTPACFIELD not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_CONSTPACFIELD implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 63:28 reserved
> +}
> +
> +void handle_aa64dfr0_el1(const UINT64 aa64dfr0_el1)
> +{
> +        UINT64 value;
> +        char* regname = "ID_AA64DFR0_EL1";
> +        char* description;
> +        char* bits;
> +
> +
> +        bits = "3:0 ";
> +        value = (aa64dfr0_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0110:
> +                        description = "Armv8 debug architecture";
> +                        break;
> +                case 0b0111:
> +                        description = "Armv8 debug architecture with VHE";
> +                        break;
> +                case 0b1000:
> +                        description = "FEAT_Debugv8p2 implemented.";
> +                        break;
> +                case 0b1001:
> +                        description = "FEAT_Debugv8p4 implemented.";
> +                        break;
> +                case 0b1010:
> +                        description = "FEAT_Debugv8p8 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "7:4 ";
> +        value = (aa64dfr0_el1 >>  4) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Trace unit System registers not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "Trace unit System registers implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "11:8 ";
> +        value = (aa64dfr0_el1 >>  8) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Performance Monitors Extension not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_PMUv3 implemented.";
> +                        break;
> +                case 0b0100:
> +                        description = "FEAT_PMUv3p1 implemented.";
> +                        break;
> +                case 0b0101:
> +                        description = "FEAT_PMUv3p4 implemented.";
> +                        break;
> +                case 0b0110:
> +                        description = "FEAT_PMUv3p5 implemented.";
> +                        break;
> +                case 0b0111:
> +                        description = "FEAT_PMUv3p7 implemented.";
> +                        break;
> +                case 0b1000:
> +                        description = "FEAT_PMUv3p8 implemented.";
> +                        break;
> +                case 0b1111:
> +                        description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "15:12";
> +        value = (aa64dfr0_el1 >> 12) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "reserved";
> +                        break;
> +                default:
> +                        description = "Number of breakpoints, minus 1.";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 19:16 reserved
> +
> +        bits = "23:20";
> +        value = (aa64dfr0_el1 >> 20) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "reserved";
> +                        break;
> +                default:
> +                        description = "Number of watchpoints, minus 1.";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 27:24 reserved
> +
> +        bits = "31:28";
> +        value = (aa64dfr0_el1 >> 28) & 0xf;
> +        switch(value)
> +        {
> +                default:
> +                        description = "Number of breakpoints that are context-aware, minus 1.";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "35:32";
> +        value = (aa64dfr0_el1 >> 32) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_SPE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_SPE implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_SPEv1p1 implemented.";
> +                        break;
> +                case 0b0011:
> +                        description = "FEAT_SPEv1p2 implemented.";
> +                        break;
> +                case 0b0100:
> +                        description = "FEAT_SPEv1p3 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "39:36";
> +        value = (aa64dfr0_el1 >> 36) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_DoubleLock implemented.";
> +                        break;
> +                case 0b1111:
> +                        description = "FEAT_DoubleLock not implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "43:40";
> +        value = (aa64dfr0_el1 >> 40) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TRF not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TRF implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "47:44";
> +        value = (aa64dfr0_el1 >> 44) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_TRBE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_TRBE implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +
> +        bits = "51:48";
> +        value = (aa64dfr0_el1 >> 48) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_MTPMU not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
> +                        break;
> +                case 0b1111:
> +                        description = "FEAT_MTPMU not implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        bits = "55:52";
> +        value = (aa64dfr0_el1 >> 52) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "FEAT_BRBE not implemented.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_BRBE implemented.";
> +                        break;
> +                case 0b0010:
> +                        description = "FEAT_BRBEv1p1 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +
> +        // 59:56 reserved
> +
> +        bits = "63:60";
> +        value = (aa64dfr0_el1 >> 60) & 0xf;
> +        switch(value)
> +        {
> +                case 0b0000:
> +                        description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
> +                        break;
> +                case 0b0001:
> +                        description = "FEAT_HPMN0 implemented.";
> +                        break;
> +                default:
> +                        description = "unknown";
> +                        break;
> +        }
> +        print_values(regname, bits, value, description);
> +}
> +
> +EFI_STATUS
> +        EFIAPI
> +UefiMain (
> +                IN EFI_HANDLE        ImageHandle,
> +                IN EFI_SYSTEM_TABLE  *SystemTable
> +         )
> +{
> +        UINT64 aa64dfr0_el1 = read_aa64dfr0_el1();
> +        UINT64 aa64dfr1_el1 = read_aa64dfr1_el1();
> +        UINT64 aa64isar0_el1 = read_aa64isar0_el1();
> +        UINT64 aa64isar1_el1 = read_aa64isar1_el1();
> +        UINT64 aa64isar2_el1 = read_aa64isar2_el1();
> +        UINT64 aa64mmfr0_el1 = read_aa64mmfr0_el1();
> +        UINT64 aa64mmfr1_el1 = read_aa64mmfr1_el1();
> +        UINT64 aa64mmfr2_el1 = read_aa64mmfr2_el1();
> +        UINT64 aa64pfr0_el1 = read_aa64pfr0_el1();
> +        UINT64 aa64pfr1_el1 = read_aa64pfr1_el1();
> +/*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1();*/
> +/*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1();*/
> +
> +        AsciiPrint("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
> +        AsciiPrint("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
> +        AsciiPrint("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
> +        AsciiPrint("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
> +        AsciiPrint("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
> +        AsciiPrint("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
> +        AsciiPrint("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
> +        AsciiPrint("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
> +        AsciiPrint("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
> +        AsciiPrint("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);      // ignore
> +/*    AsciiPrint("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
> +/*    AsciiPrint("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
> +
> +        AsciiPrint("\n");
> +        print_text("Register", "Bits", "Value", "Feature");
> +        print_spacer();
> +
> +        handle_aa64mmfr0_el1(aa64mmfr0_el1);
> +        print_spacer();
> +        handle_aa64mmfr1_el1(aa64mmfr1_el1, aa64pfr0_el1);
> +        print_spacer();
> +        handle_aa64mmfr2_el1(aa64mmfr2_el1);
> +
> +        print_spacer();
> +        handle_aa64pfr0_el1(aa64pfr0_el1, aa64pfr1_el1);
> +        print_spacer();
> +        handle_aa64pfr1_el1(aa64pfr1_el1);
> +
> +        print_spacer();
> +        handle_aa64isar0_el1(aa64isar0_el1);
> +        print_spacer();
> +        handle_aa64isar1_el1(aa64isar1_el1);
> +        print_spacer();
> +        handle_aa64isar2_el1(aa64isar2_el1);
> +
> +        print_spacer();
> +        handle_aa64dfr0_el1(aa64dfr0_el1);
> +
> +        return EFI_SUCCESS;
> +}
> diff --git a/MdeModulePkg/Application/ArmCpuInfo/readregs.s b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
> new file mode 100644
> index 000000000000..052834b3c3f2
> --- /dev/null
> +++ b/MdeModulePkg/Application/ArmCpuInfo/readregs.s
> @@ -0,0 +1,49 @@
> +#include <AsmMacroIoLibV8.h>
> +
> +ASM_FUNC(read_aa64pfr0_el1)
> +        mrs x0, ID_AA64PFR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64pfr1_el1)
> +        mrs x0, ID_AA64PFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64dfr0_el1)
> +        mrs x0, ID_AA64DFR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64dfr1_el1)
> +        mrs x0, ID_AA64DFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar0_el1)
> +        mrs x0, ID_AA64ISAR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar1_el1)
> +        mrs x0, ID_AA64ISAR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar2_el1)
> +        mrs x0, ID_AA64ISAR2_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr0_el1)
> +        mrs x0, ID_AA64MMFR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr1_el1)
> +        mrs x0, ID_AA64MMFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr2_el1)
> +        mrs x0, ID_AA64MMFR2_EL1;
> +        ret;
> +
> +# ASM_FUNC(read_aa64zfr0_el1)
> +#     mrs x0, ID_AA64ZFR0_EL1;
> +#     ret;
> +
> +# ASM_FUNC(read_aa64smfr0_el1)
> +#     mrs x0, ID_AA64SMFR0_EL1;
> +#     ret;
> --
> 2.40.0
>
>
>
> ------------
> Groups.io Links: You receive all messages sent to this group.
> View/Reply Online (#102680): https://edk2.groups.io/g/devel/message/102680
> Mute This Topic: https://groups.io/mt/98122223/5717338
> Group Owner: devel+owner@edk2.groups.io
> Unsubscribe: https://edk2.groups.io/g/devel/unsub [ardb+tianocore@kernel.org]
> ------------
>
>


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102681): https://edk2.groups.io/g/devel/message/102681
Mute This Topic: https://groups.io/mt/98122223/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v2] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
W dniu 7.04.2023 o 12:55, Ard Biesheuvel pisze:
> Hello Marcin,
> 
> Thanks for this - it looks useful.
 > Some comments below.

Thanks.
> On Fri, 7 Apr 2023 at 12:40, Marcin Juszkiewicz
> <marcin.juszkiewicz@linaro.org> wrote:
>>
>> App goes through ID_AA64*_EL1 system registers and decode their values.
>>
>> First version which does not use much of current AArch64 support code
>> present in EDK2. Written to check what data is there and what can be
>> done with it.
>>
>> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
>> ---
>>   MdeModulePkg/MdeModulePkg.dsc                      |    3 +-
>>   MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
>>   MdeModulePkg/Application/ArmCpuInfo/readargs.h     |   12 +
>>   MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2274 ++++++++++++++++++++
>>   MdeModulePkg/Application/ArmCpuInfo/readregs.s     |   49 +
>>   5 files changed, 2375 insertions(+), 1 deletion(-)
>>
> 
> Why are you adding this to MdeModulePkg rather than ArmPkg?

This is the first time I wrote something for EDK2 so worked to get it 
built first rather than to get it right. Looked at HelloWorld example 
and followed.

Moved to ArmPkg/Application/ArmCpuInfo/ in current code.

>> diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
>> index 1014598f31c3..1ecfb345159f 100644
>> --- a/MdeModulePkg/MdeModulePkg.dsc
>> +++ b/MdeModulePkg/MdeModulePkg.dsc
>> @@ -216,6 +216,7 @@ [PcdsDynamicExDefault]
>>     gEfiMdeModulePkgTokenSpaceGuid.PcdRecoveryFileName|L"FVMAIN.FV"
>>
>>   [Components]
>> +  MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.inf
>>     MdeModulePkg/Application/HelloWorld/HelloWorld.inf
>>     MdeModulePkg/Application/DumpDynPcd/DumpDynPcd.inf
>>     MdeModulePkg/Application/MemoryProfileInfo/MemoryProfileInfo.inf
>> @@ -520,4 +521,4 @@ [Components.X64]
>>     MdeModulePkg/Universal/CapsulePei/CapsuleX64.inf
>>
>>   [BuildOptions]
>> -
>> +GCC:*_*_AARCH64_CC_FLAGS = -march=armv9-a
> 
> This belongs in the app's INF, not in the package DSC where it affects
> code generation for all components, which may need to run on much
> older CPUs

Dropped that line as it was not needed in the end.

>> diff --git a/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c b/MdeModulePkg/Application/ArmCpuInfo/ArmCpuInfo.c
>> new file mode 100644
>> index 000000000000..ac27902e3533
>> +void print_values(const char* field, const char* bits, const int value, const char* description)
>> +{
>> +        char binaries[17][5] = {"0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
>> +                                "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"};
>> +
> 
> STATIC CONST CHAR8[] please, and you can use [] for the first
> dimension (and drop the final element)

done

>> +        AsciiPrint(" %-16a | %5a | %5a | %a\n", field, bits, binaries[value], description);
> 
> This should be value & 0xf so you never access outside of the array.

done

>> +void handle_aa64mmfr0_el1(const UINT64 aa64mmfr0_el1)
>> +{
>> +        UINT64 value;
>> +        char* regname = "ID_AA64MMFR0_EL1";
> 
> STATIC CONST CHAR8 RegName[] = ...

done

>> +        char* description;
>> +        char* bits;
> 
> CONST

It is not const.

>> +
>> +
>> +        bits = "3:0 ";
>> +        value = aa64mmfr0_el1 & 0xf;
>> +        switch(value)
> 
> Space after switch

done

>> +        if(value == 0b0110)
> 
> Space after if

done

> etc etc
> 
> There are some other style issues here, which I am sure the CI will
> whine about, so you might want to run uncrustify on it.

done



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102693): https://edk2.groups.io/g/devel/message/102693
Mute This Topic: https://groups.io/mt/98122223/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-


Re: [edk2-devel] [PATCH v2] add ArmCpuInfo EFI application
Posted by Ard Biesheuvel 1 year ago
On Fri, 7 Apr 2023 at 14:46, Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> W dniu 7.04.2023 o 12:55, Ard Biesheuvel pisze:
> > Hello Marcin,
> >
> > Thanks for this - it looks useful.
>  > Some comments below.
>
> Thanks.
> > On Fri, 7 Apr 2023 at 12:40, Marcin Juszkiewicz
> > <marcin.juszkiewicz@linaro.org> wrote:
> >>
...
> >> +        char* description;
> >> +        char* bits;
> >
> > CONST
>
> It is not const.
>

The pointer is not const but the string is

const char *bits;

allows you to make 'bits' point to different constant string literals.


char *bits;

is only needed if you are pointing 'bits' at a string and subsequently
modify the /contents/ of the string, but i don't thank that is what
you are doing here.


> >> +
> >> +
> >> +        bits = "3:0 ";
> >> +        value = aa64mmfr0_el1 & 0xf;
> >> +        switch(value)
> >
> > Space after switch
>
> done
>
> >> +        if(value == 0b0110)
> >
> > Space after if
>
> done
>
> > etc etc
> >
> > There are some other style issues here, which I am sure the CI will
> > whine about, so you might want to run uncrustify on it.
>
> done
>


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102697): https://edk2.groups.io/g/devel/message/102697
Mute This Topic: https://groups.io/mt/98122223/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
[edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
App goes through ID_AA64*_EL1 system registers and decode their values.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
 ArmPkg/ArmPkg.dsc                            |    1 +
 ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
 ArmPkg/Application/ArmCpuInfo/readargs.h     |   12 +
 ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2317 ++++++++++++++++++++
 ArmPkg/Application/ArmCpuInfo/readregs.s     |   49 +
 5 files changed, 2417 insertions(+)

diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
index 3fb95d1951a9..6b938ce8b671 100644
--- a/ArmPkg/ArmPkg.dsc
+++ b/ArmPkg/ArmPkg.dsc
@@ -166,6 +166,7 @@ [Components.AARCH64]
   ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.inf
   ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.inf
   ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf
+  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
 
 [Components.AARCH64, Components.ARM]
   ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
new file mode 100644
index 000000000000..158f86a4740c
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
@@ -0,0 +1,38 @@
+## @file
+#
+#  Attempt to have AArch64 cpu information.
+#
+#  Based on HelloWorld:
+#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
+#  Copyright (c) 2023 Marcin Juszkiewicz
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010019
+  BASE_NAME                      = ArmCpuInfo
+  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = UefiMain
+
+#
+#  This flag specifies whether HII resource section is generated into PE image.
+#
+  UEFI_HII_RESOURCE_SECTION      = TRUE
+
+[Sources]
+  ArmCpuInfo.c
+  readregs.s
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  UefiApplicationEntryPoint
+  UefiLib
diff --git a/ArmPkg/Application/ArmCpuInfo/readargs.h b/ArmPkg/Application/ArmCpuInfo/readargs.h
new file mode 100644
index 000000000000..eaa52cf16145
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/readargs.h
@@ -0,0 +1,12 @@
+UINT64 read_aa64pfr0_el1(void);
+UINT64 read_aa64pfr1_el1(void);
+UINT64 read_aa64dfr0_el1(void);
+UINT64 read_aa64dfr1_el1(void);
+UINT64 read_aa64isar0_el1(void);
+UINT64 read_aa64isar1_el1(void);
+UINT64 read_aa64isar2_el1(void);
+UINT64 read_aa64mmfr0_el1(void);
+UINT64 read_aa64mmfr1_el1(void);
+UINT64 read_aa64mmfr2_el1(void);
+UINT64 read_aa64smfr0_el1(void);
+UINT64 read_aa64zfr0_el1(void);
diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
new file mode 100644
index 000000000000..6c31ad4dbcb9
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
@@ -0,0 +1,2317 @@
+/** @file
+
+  Copyright  (c) 2023 Marcin Juszkiewicz
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <Library/UefiLib.h>
+#include "readargs.h"
+
+void
+print_text (
+  const char  *field,
+  const char  *bits,
+  const char  *value,
+  const char  *description
+  )
+{
+  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, value, description);
+}
+
+void
+print_values (
+  const char  *field,
+  const char  *bits,
+  const int   value,
+  const char  *description
+  )
+{
+  STATIC CONST CHAR8  binaries[][5] = {
+    "0000", "0001", "0010", "0011",
+    "0100", "0101", "0110", "0111","1000",  "1001", "1010", "1011",
+    "1100", "1101", "1110", "1111"
+  };
+
+  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, binaries[value & 0xf], description);
+}
+
+void
+print_spacer (
+  void
+  )
+{
+  AsciiPrint ("------------------|-------|-------|----------------------------------------------\n");
+}
+
+void
+handle_aa64mmfr0_el1 (
+  const UINT64  aa64mmfr0_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR0_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = aa64mmfr0_el1 & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "32 bits  (4GB) of physical address range supported.";
+      break;
+    case 0b0001:
+      description = "36 bits  (64GB) of physical address range supported.";
+      break;
+    case 0b0010:
+      description = "40 bits  (1TB) of physical address range supported.";
+      break;
+    case 0b0011:
+      description = "42 bits  (4TB) of physical address range supported.";
+      break;
+    case 0b0100:
+      description = "44 bits  (16TB) of physical address range supported.";
+      break;
+    case 0b0101:
+      description = "48 bits  (256TB) of physical address range supported.";
+      break;
+    case 0b0110:
+      description = "52 bits  (4PB) of physical address range supported.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+  if (value == 0b0110) {
+    print_text ("", "", "", "FEAT_LPA implemented.");
+  }
+
+  bits  = "7:4 ";
+  value = (aa64mmfr0_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "ASID: 8 bits";
+      break;
+    case 0b0010:
+      description = "ASID: 16 bits";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64mmfr0_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "No mixed-endian support.";
+      break;
+    case 0b0001:
+      description = "Mixed-endian support.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // only valid for BigEnd != 0b0000
+  if (((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 ) {
+    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 ) {
+      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
+    }
+
+    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 ) {
+      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
+    }
+  }
+
+  bits  = "15:12";
+  value = (aa64mmfr0_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "No support for a distinction between Secure and Non-Secure Memory.";
+      break;
+    case 0b0001:
+      description = "Supports a distinction between Secure and Non-Secure Memory.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64mmfr0_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = " 4KB granule supported.";
+      break;
+    case 0b1111:
+      description = " 4KB granule not supported.";
+      break;
+    case 0b0001:             // add FEAT_LPA2 check
+      description = " 4KB granule supported for 52-bit address.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64mmfr0_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0001:
+      description = " 4KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      description = " 4KB granule supported at stage 2.";
+      break;
+    case 0b0011:
+      description = " 4KB granule supported at stage 2 for 52-bit address.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64mmfr0_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "16KB granule not supported.";
+      break;
+    case 0b0001:
+      description = "16KB granule supported.";
+      break;
+    case 0b0010:             // add FEAT_LPA2 check
+      description = "16KB granule supported for 52-bit address.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64mmfr0_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0001:
+      description = "16KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      description = "16KB granule supported at stage 2.";
+      break;
+    case 0b0011:
+      description = "16KB granule supported at stage 2 for 52-bit address.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64mmfr0_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "64KB granule supported.";
+      break;
+    case 0b1111:
+      description = "64KB granule not supported.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64mmfr0_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0001:
+      description = "64KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      description = "64KB granule supported at stage 2.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64mmfr0_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_ExS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_ExS implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 55:48 reserved
+
+  bits  = "59:56";
+  value = (aa64mmfr0_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_FGT not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_FGT implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "63:60";
+  value = (aa64mmfr0_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_ECV not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_ECV implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_ECV implemented with extras.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+void
+handle_aa64mmfr1_el1 (
+  const UINT64  aa64mmfr1_el1,
+  const UINT64  aa64pfr0_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR1_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = aa64mmfr1_el1 & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_HAFDBS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_HAFDBS implemented without dirty status support.";
+      break;
+    case 0b0010:
+      description = "FEAT_HAFDBS implemented with dirty status support.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64mmfr1_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_VMID16 not implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_VMID16 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64mmfr1_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_VHE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_VHE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64mmfr1_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_HPDS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_HPDS implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_HPDS2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64mmfr1_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LOR not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LOR implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64mmfr1_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_PAN not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PAN implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_PAN2 implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_PAN3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // when FEAT_RAS implemented
+  if ((((aa64pfr0_el1 >> 28) & 0xf) == 0b0001) ||
+      (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010))
+  {
+    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 ) {
+      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
+      print_text ("", "", "", "an External abort on a speculative read.");
+    }
+
+    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 ) {
+      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
+      print_text ("", "", "", "an External abort on a speculative read.");
+    }
+  }
+
+  bits  = "31:28";
+  value = (aa64mmfr1_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_XNX not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_XNX implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64mmfr1_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TWED not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TWED implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64mmfr1_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_ETS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_ETS implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64mmfr1_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_HCX not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_HCX implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64mmfr1_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_AFP not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_AFP implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "51:48";
+  value = (aa64mmfr1_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_nTLBPA not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_nTLBPA implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64mmfr1_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TIDCP1 not implemented";
+      break;
+    case 0b0001:
+      description = "FEAT_TIDCP1 implemented";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "59:56";
+  value = (aa64mmfr1_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_CMOW not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_CMOW implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 63:60 reserved
+}
+
+void
+handle_aa64mmfr2_el1 (
+  const UINT64  aa64mmfr2_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR2_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = (aa64mmfr2_el1)       & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TTCNP not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TTCNP implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64mmfr2_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_UAO not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_UAO implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64mmfr2_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LSMAOC not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LSMAOC implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64mmfr2_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_IESB not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_IESB implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64mmfr2_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LVA not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LVA implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64mmfr2_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_CCIDX not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_CCIDX implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64mmfr2_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_NV not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_NV implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_NV2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64mmfr2_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TTST not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TTST implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64mmfr2_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LSE2 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LSE2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64mmfr2_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_IDST not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_IDST implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64mmfr2_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_S2FWB not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_S2FWB implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 47:44 reserved
+
+  bits  = "51:48";
+  value = (aa64mmfr2_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TTL not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TTL implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64mmfr2_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_BBM: Level 0 support for changing block size is supported.";
+      break;
+    case 0b0001:
+      description = "FEAT_BBM: Level 1 support for changing block size is supported.";
+      break;
+    case 0b0010:
+      description = "FEAT_BBM: Level 2 support for changing block size is supported.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "59:56";
+  value = (aa64mmfr2_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_EVT not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
+      break;
+    case 0b0010:
+      description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "63:60";
+  value = (aa64mmfr2_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_E0PD not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_E0PD implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+void
+handle_aa64pfr0_el1 (
+  const UINT64  aa64pfr0_el1,
+  const UINT64  aa64pfr1_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR0_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = (aa64pfr0_el1)       & 0xf;
+  switch (value) {
+    case 0b0001:
+      description = "EL0 in AArch64 only";
+      break;
+    case 0b0010:
+      description = "EL0 in AArch64 and AArch32";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64pfr0_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0001:
+      description = "EL1 in AArch64 only";
+      break;
+    case 0b0010:
+      description = "EL1 in AArch64 and AArch32";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64pfr0_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "EL2 not implemented.";
+      break;
+    case 0b0001:
+      description = "EL2 in AArch64 only";
+      break;
+    case 0b0010:
+      description = "EL2 in AArch64 and AArch32";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64pfr0_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "EL3 not implemented.";
+      break;
+    case 0b0001:
+      description = "EL3 in AArch64 only";
+      break;
+    case 0b0010:
+      description = "EL3 in AArch64 and AArch32";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64pfr0_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Floating-point implemented.";
+      break;
+    case 0b0001:
+      description = "Floating-point with half-precision support  (FEAT_FP16).";
+      break;
+    case 0b1111:
+      description = "Floating-point not implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64pfr0_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Advanced SIMD implemented.";
+      break;
+    case 0b0001:
+      description = "Advanced SIMD with half precision support  (FEAT_FP16).";
+      break;
+    case 0b1111:
+      description = "Advanced SIMD not implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64pfr0_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "System registers of GIC CPU not implemented.";
+      break;
+    case 0b0001:
+      description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
+      break;
+    case 0b0011:
+      description = "System registers to versions 4.1 of GIC CPU implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64pfr0_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RAS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_RAS implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_RASv1p1 implemented.";
+      // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
+      if ((((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
+          (((aa64pfr0_el1 >> 12) & 0xf) == 0b0010))
+      {
+        description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
+      }
+
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64pfr0_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SVE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SVE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64pfr0_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Secure EL2 not implemented.";
+      break;
+    case 0b0001:
+      description = "Secure EL2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64pfr0_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
+        description = "FEAT_MPAM not implemented.";
+      }
+
+      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
+        description = "FEAT_MPAM v0.1 implemented.";
+      }
+
+      break;
+    case 0b0001:
+      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
+        description = "FEAT_MPAM v1.0 implemented.";
+      }
+
+      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
+        description = "FEAT_MPAM v1.1 implemented.";
+      }
+
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64pfr0_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_AMU not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_AMUv1 implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_AMUv1p1 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "51:48";
+  value = (aa64pfr0_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_DIT not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_DIT implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64pfr0_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RME not implemented";
+      break;
+    case 0b0001:
+      description = "FEAT_RME implemented";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "59:56";
+  value = (aa64pfr0_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "no info is FEAT_CSV2 implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_CSV2 implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_CSV2_2 implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_CSV2_3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+  if (value == 0b0001) {
+    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 ) {
+      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
+    }
+
+    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 ) {
+      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
+    }
+  }
+
+  bits  = "63:60";
+  value = (aa64pfr0_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_CSV3 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_CSV3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+void
+handle_aa64pfr1_el1 (
+  const UINT64  aa64pfr1_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR1_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = aa64pfr1_el1 & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_BTI not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_BTI implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64pfr1_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SSBS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SSBS implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_SSBS2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64pfr1_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_MTE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_MTE implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_MTE2 implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_MTE3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 15:12 is RAS_frac
+  // 19:16 is MPAM_frac
+  // 23:20 is reserved
+
+  bits  = "27:24";
+  value = (aa64pfr1_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SME not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SME implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64pfr1_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RNG_TRAP not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_RNG_TRAP implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 35:32 is CSV2_frac
+
+  bits  = "39:36";
+  value = (aa64pfr1_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_NMI not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_NMI implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 63:40 are reserved
+}
+
+void
+handle_aa64isar0_el1 (
+  const UINT64  aa64isar0_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR0_EL1";
+  char                *description;
+  char                *bits;
+
+  // 3:0 reserved
+
+  bits  = "7:4 ";
+  value = (aa64isar0_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_AES, FEAT_PMULL not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_AES implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_AES and FEAT_PMULL implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64isar0_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SHA1 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SHA1 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64isar0_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SHA256 implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_SHA512 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64isar0_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "CRC32 not implemented.";
+      break;
+    case 0b0001:
+      description = "CRC32 instructions implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64isar0_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LSE not implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_LSE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64isar0_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "TME instructions not implemented.";
+      break;
+    case 0b0001:
+      description = "TME instructions implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64isar0_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RDM not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_RDM implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64isar0_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SHA3 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SHA3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64isar0_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SM3 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SM3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64isar0_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SM4 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SM4 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64isar0_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_DotProd not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_DotProd implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "51:48";
+  value = (aa64isar0_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_FHM not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_FHM implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64isar0_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_FlagM implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_FlagM2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "59:56";
+  value = (aa64isar0_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TLBIOS implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_TLBIRANGE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "63:60";
+  value = (aa64isar0_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RNG not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_RNG implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+void
+handle_aa64isar1_el1 (
+  const UINT64  aa64isar1_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR1_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = (aa64isar1_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "DC CVAP not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_DPB implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_DPB2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64isar1_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Address Authentication  (APA) not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+  if (value > 0) {
+    print_text ("", "", "", "FEAT_PACQARMA5 implemented.");
+  }
+
+  bits  = "11:8 ";
+  value = (aa64isar1_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Address Authentication  (API) not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+  if (value > 0) {
+    print_text ("", "", "", "FEAT_PACIMP implemented.");
+  }
+
+  bits  = "15:12";
+  value = (aa64isar1_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_JSCVT not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_JSCVT implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64isar1_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_FCMA not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_FCMA implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64isar1_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LRCPC (2) not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LRCPC implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_LRCPC2 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64isar1_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_PACQARMA5 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PACQARMA5 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "31:28";
+  value = (aa64isar1_el1 >> 28) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_PACIMP not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PACIMP implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64isar1_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_FRINTTS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_FRINTTS implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64isar1_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SB not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SB implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64isar1_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SPECRES not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SPECRES implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64isar1_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_BF16 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_BF16 implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_EBF16 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "51:48";
+  value = (aa64isar1_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_DGH not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_DGH implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64isar1_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_I8MM not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_I8MM implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "59:56";
+  value = (aa64isar1_el1 >> 56) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_XS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_XS implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "63:60";
+  value = (aa64isar1_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_LS64 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_LS64 implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_LS64_V implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_LS64_ACCDATA implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+void
+handle_aa64isar2_el1 (
+  const UINT64  aa64isar2_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR2_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = (aa64isar2_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_WFxT not implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_WFxT implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64isar2_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_RPRES not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_RPRES implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64isar2_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_PACQARMA3 not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PACQARMA3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64isar2_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Address Authentication  (APA3) not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "19:16";
+  value = (aa64isar2_el1 >> 16) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_MOPS not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_MOPS implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "23:20";
+  value = (aa64isar2_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_HBC not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_HBC implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "27:24";
+  value = (aa64isar2_el1 >> 24) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_CONSTPACFIELD not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_CONSTPACFIELD implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 63:28 reserved
+}
+
+void
+handle_aa64dfr0_el1 (
+  const UINT64  aa64dfr0_el1
+  )
+{
+  UINT64              value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64DFR0_EL1";
+  char                *description;
+  char                *bits;
+
+  bits  = "3:0 ";
+  value = (aa64dfr0_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0110:
+      description = "Armv8 debug architecture";
+      break;
+    case 0b0111:
+      description = "Armv8 debug architecture with VHE";
+      break;
+    case 0b1000:
+      description = "FEAT_Debugv8p2 implemented.";
+      break;
+    case 0b1001:
+      description = "FEAT_Debugv8p4 implemented.";
+      break;
+    case 0b1010:
+      description = "FEAT_Debugv8p8 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "7:4 ";
+  value = (aa64dfr0_el1 >>  4) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Trace unit System registers not implemented.";
+      break;
+    case 0b0001:
+      description = "Trace unit System registers implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "11:8 ";
+  value = (aa64dfr0_el1 >>  8) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Performance Monitors Extension not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_PMUv3 implemented.";
+      break;
+    case 0b0100:
+      description = "FEAT_PMUv3p1 implemented.";
+      break;
+    case 0b0101:
+      description = "FEAT_PMUv3p4 implemented.";
+      break;
+    case 0b0110:
+      description = "FEAT_PMUv3p5 implemented.";
+      break;
+    case 0b0111:
+      description = "FEAT_PMUv3p7 implemented.";
+      break;
+    case 0b1000:
+      description = "FEAT_PMUv3p8 implemented.";
+      break;
+    case 0b1111:
+      description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "15:12";
+  value = (aa64dfr0_el1 >> 12) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "reserved";
+      break;
+    default:
+      description = "Number of breakpoints, minus 1.";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 19:16 reserved
+
+  bits  = "23:20";
+  value = (aa64dfr0_el1 >> 20) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "reserved";
+      break;
+    default:
+      description = "Number of watchpoints, minus 1.";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 27:24 reserved
+
+  bits  = "31:28";
+  value = (aa64dfr0_el1 >> 28) & 0xf;
+  switch (value) {
+    default:
+      description = "Number of breakpoints that are context-aware, minus 1.";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "35:32";
+  value = (aa64dfr0_el1 >> 32) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_SPE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_SPE implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_SPEv1p1 implemented.";
+      break;
+    case 0b0011:
+      description = "FEAT_SPEv1p2 implemented.";
+      break;
+    case 0b0100:
+      description = "FEAT_SPEv1p3 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "39:36";
+  value = (aa64dfr0_el1 >> 36) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_DoubleLock implemented.";
+      break;
+    case 0b1111:
+      description = "FEAT_DoubleLock not implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "43:40";
+  value = (aa64dfr0_el1 >> 40) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TRF not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TRF implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "47:44";
+  value = (aa64dfr0_el1 >> 44) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_TRBE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_TRBE implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "51:48";
+  value = (aa64dfr0_el1 >> 48) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_MTPMU not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
+      break;
+    case 0b1111:
+      description = "FEAT_MTPMU not implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  bits  = "55:52";
+  value = (aa64dfr0_el1 >> 52) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "FEAT_BRBE not implemented.";
+      break;
+    case 0b0001:
+      description = "FEAT_BRBE implemented.";
+      break;
+    case 0b0010:
+      description = "FEAT_BRBEv1p1 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+
+  // 59:56 reserved
+
+  bits  = "63:60";
+  value = (aa64dfr0_el1 >> 60) & 0xf;
+  switch (value) {
+    case 0b0000:
+      description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
+      break;
+    case 0b0001:
+      description = "FEAT_HPMN0 implemented.";
+      break;
+    default:
+      description = "unknown";
+      break;
+  }
+
+  print_values (RegName, bits, value, description);
+}
+
+EFI_STATUS
+EFIAPI
+UefiMain  (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  UINT64  aa64dfr0_el1  = read_aa64dfr0_el1 ();
+  UINT64  aa64dfr1_el1  = read_aa64dfr1_el1 ();
+  UINT64  aa64isar0_el1 = read_aa64isar0_el1 ();
+  UINT64  aa64isar1_el1 = read_aa64isar1_el1 ();
+  UINT64  aa64isar2_el1 = read_aa64isar2_el1 ();
+  UINT64  aa64mmfr0_el1 = read_aa64mmfr0_el1 ();
+  UINT64  aa64mmfr1_el1 = read_aa64mmfr1_el1 ();
+  UINT64  aa64mmfr2_el1 = read_aa64mmfr2_el1 ();
+  UINT64  aa64pfr0_el1  = read_aa64pfr0_el1 ();
+  UINT64  aa64pfr1_el1  = read_aa64pfr1_el1 ();
+
+  /*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1 ();*/
+  /*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1 ();*/
+
+  AsciiPrint ("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
+  AsciiPrint ("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
+  AsciiPrint ("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
+  AsciiPrint ("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
+  AsciiPrint ("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
+  AsciiPrint ("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
+  AsciiPrint ("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
+  AsciiPrint ("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
+  AsciiPrint ("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
+  AsciiPrint ("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);            // ignore
+  /*    AsciiPrint ("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
+  /*    AsciiPrint ("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
+
+  AsciiPrint ("\n");
+  print_text ("Register", "Bits", "Value", "Feature");
+  print_spacer ();
+
+  handle_aa64mmfr0_el1 (aa64mmfr0_el1);
+  print_spacer ();
+  handle_aa64mmfr1_el1 (aa64mmfr1_el1, aa64pfr0_el1);
+  print_spacer ();
+  handle_aa64mmfr2_el1 (aa64mmfr2_el1);
+
+  print_spacer ();
+  handle_aa64pfr0_el1 (aa64pfr0_el1, aa64pfr1_el1);
+  print_spacer ();
+  handle_aa64pfr1_el1 (aa64pfr1_el1);
+
+  print_spacer ();
+  handle_aa64isar0_el1 (aa64isar0_el1);
+  print_spacer ();
+  handle_aa64isar1_el1 (aa64isar1_el1);
+  print_spacer ();
+  handle_aa64isar2_el1 (aa64isar2_el1);
+
+  print_spacer ();
+  handle_aa64dfr0_el1 (aa64dfr0_el1);
+
+  return EFI_SUCCESS;
+}
diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s
new file mode 100644
index 000000000000..052834b3c3f2
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/readregs.s
@@ -0,0 +1,49 @@
+#include <AsmMacroIoLibV8.h>
+
+ASM_FUNC(read_aa64pfr0_el1)
+        mrs x0, ID_AA64PFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64pfr1_el1)
+        mrs x0, ID_AA64PFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64dfr0_el1)
+        mrs x0, ID_AA64DFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64dfr1_el1)
+        mrs x0, ID_AA64DFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar0_el1)
+        mrs x0, ID_AA64ISAR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar1_el1)
+        mrs x0, ID_AA64ISAR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64isar2_el1)
+        mrs x0, ID_AA64ISAR2_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr0_el1)
+        mrs x0, ID_AA64MMFR0_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr1_el1)
+        mrs x0, ID_AA64MMFR1_EL1;
+        ret;
+
+ASM_FUNC(read_aa64mmfr2_el1)
+        mrs x0, ID_AA64MMFR2_EL1;
+        ret;
+
+# ASM_FUNC(read_aa64zfr0_el1)
+#     mrs x0, ID_AA64ZFR0_EL1;
+#     ret;
+
+# ASM_FUNC(read_aa64smfr0_el1)
+#     mrs x0, ID_AA64SMFR0_EL1;
+#     ret;
-- 
2.40.0



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102694): https://edk2.groups.io/g/devel/message/102694
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Pedro Falcato 1 year ago
On Fri, Apr 7, 2023 at 1:47 PM Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> App goes through ID_AA64*_EL1 system registers and decode their values.
>
> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
> ---
>  ArmPkg/ArmPkg.dsc                            |    1 +
>  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
>  ArmPkg/Application/ArmCpuInfo/readargs.h     |   12 +
>  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2317 ++++++++++++++++++++
>  ArmPkg/Application/ArmCpuInfo/readregs.s     |   49 +
>  5 files changed, 2417 insertions(+)
>
> diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
> index 3fb95d1951a9..6b938ce8b671 100644
> --- a/ArmPkg/ArmPkg.dsc
> +++ b/ArmPkg/ArmPkg.dsc
> @@ -166,6 +166,7 @@ [Components.AARCH64]
>    ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.inf
>    ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.inf
>    ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf
> +  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
>
>  [Components.AARCH64, Components.ARM]
>    ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
> diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> new file mode 100644
> index 000000000000..158f86a4740c
> --- /dev/null
> +++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> @@ -0,0 +1,38 @@
> +## @file
> +#
> +#  Attempt to have AArch64 cpu information.
> +#
> +#  Based on HelloWorld:
> +#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
> +#  Copyright (c) 2023 Marcin Juszkiewicz
> +#
> +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#
> +##
> +
> +[Defines]
> +  INF_VERSION                    = 0x00010019
> +  BASE_NAME                      = ArmCpuInfo
> +  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
> +  MODULE_TYPE                    = UEFI_APPLICATION
> +  VERSION_STRING                 = 1.0
> +  ENTRY_POINT                    = UefiMain
> +
> +#
> +#  This flag specifies whether HII resource section is generated into PE image.
> +#
> +  UEFI_HII_RESOURCE_SECTION      = TRUE
> +
> +[Sources]
> +  ArmCpuInfo.c
> +  readregs.s
> +
> +[Packages]
> +  ArmPkg/ArmPkg.dec
> +  MdePkg/MdePkg.dec
> +  MdeModulePkg/MdeModulePkg.dec
> +
> +[LibraryClasses]
> +  UefiApplicationEntryPoint
> +  UefiLib
> diff --git a/ArmPkg/Application/ArmCpuInfo/readargs.h b/ArmPkg/Application/ArmCpuInfo/readargs.h
> new file mode 100644
> index 000000000000..eaa52cf16145
> --- /dev/null
> +++ b/ArmPkg/Application/ArmCpuInfo/readargs.h
> @@ -0,0 +1,12 @@
> +UINT64 read_aa64pfr0_el1(void);
> +UINT64 read_aa64pfr1_el1(void);
> +UINT64 read_aa64dfr0_el1(void);
> +UINT64 read_aa64dfr1_el1(void);
> +UINT64 read_aa64isar0_el1(void);
> +UINT64 read_aa64isar1_el1(void);
> +UINT64 read_aa64isar2_el1(void);
> +UINT64 read_aa64mmfr0_el1(void);
> +UINT64 read_aa64mmfr1_el1(void);
> +UINT64 read_aa64mmfr2_el1(void);
> +UINT64 read_aa64smfr0_el1(void);
> +UINT64 read_aa64zfr0_el1(void);
> diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
> new file mode 100644
> index 000000000000..6c31ad4dbcb9
> --- /dev/null
> +++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
> @@ -0,0 +1,2317 @@
> +/** @file
> +
> +  Copyright  (c) 2023 Marcin Juszkiewicz
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
> + **/
> +
> +#include <Library/UefiLib.h>
> +#include "readargs.h"
> +
> +void
> +print_text (
> +  const char  *field,
> +  const char  *bits,
> +  const char  *value,
> +  const char  *description
> +  )
> +{
> +  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, value, description);
> +}
> +
> +void
> +print_values (
> +  const char  *field,
> +  const char  *bits,
> +  const int   value,
> +  const char  *description
> +  )
> +{
> +  STATIC CONST CHAR8  binaries[][5] = {
> +    "0000", "0001", "0010", "0011",
> +    "0100", "0101", "0110", "0111","1000",  "1001", "1010", "1011",
> +    "1100", "1101", "1110", "1111"
> +  };
> +
> +  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, binaries[value & 0xf], description);
> +}
> +
> +void
> +print_spacer (
> +  void
> +  )
> +{
> +  AsciiPrint ("------------------|-------|-------|----------------------------------------------\n");
> +}
> +
> +void
> +handle_aa64mmfr0_el1 (
> +  const UINT64  aa64mmfr0_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR0_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = aa64mmfr0_el1 & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "32 bits  (4GB) of physical address range supported.";
> +      break;
> +    case 0b0001:
> +      description = "36 bits  (64GB) of physical address range supported.";
> +      break;
> +    case 0b0010:
> +      description = "40 bits  (1TB) of physical address range supported.";
> +      break;
> +    case 0b0011:
> +      description = "42 bits  (4TB) of physical address range supported.";
> +      break;
> +    case 0b0100:
> +      description = "44 bits  (16TB) of physical address range supported.";
> +      break;
> +    case 0b0101:
> +      description = "48 bits  (256TB) of physical address range supported.";
> +      break;
> +    case 0b0110:
> +      description = "52 bits  (4PB) of physical address range supported.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +  if (value == 0b0110) {
> +    print_text ("", "", "", "FEAT_LPA implemented.");
> +  }
> +
> +  bits  = "7:4 ";
> +  value = (aa64mmfr0_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "ASID: 8 bits";
> +      break;
> +    case 0b0010:
> +      description = "ASID: 16 bits";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64mmfr0_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "No mixed-endian support.";
> +      break;
> +    case 0b0001:
> +      description = "Mixed-endian support.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // only valid for BigEnd != 0b0000
> +  if (((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 ) {
> +    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 ) {
> +      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
> +    }
> +
> +    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 ) {
> +      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
> +    }
> +  }
> +
> +  bits  = "15:12";
> +  value = (aa64mmfr0_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "No support for a distinction between Secure and Non-Secure Memory.";
> +      break;
> +    case 0b0001:
> +      description = "Supports a distinction between Secure and Non-Secure Memory.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64mmfr0_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = " 4KB granule supported.";
> +      break;
> +    case 0b1111:
> +      description = " 4KB granule not supported.";
> +      break;
> +    case 0b0001:             // add FEAT_LPA2 check
> +      description = " 4KB granule supported for 52-bit address.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64mmfr0_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0001:
> +      description = " 4KB granule not supported at stage 2.";
> +      break;
> +    case 0b0010:
> +      description = " 4KB granule supported at stage 2.";
> +      break;
> +    case 0b0011:
> +      description = " 4KB granule supported at stage 2 for 52-bit address.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64mmfr0_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "16KB granule not supported.";
> +      break;
> +    case 0b0001:
> +      description = "16KB granule supported.";
> +      break;
> +    case 0b0010:             // add FEAT_LPA2 check
> +      description = "16KB granule supported for 52-bit address.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64mmfr0_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0001:
> +      description = "16KB granule not supported at stage 2.";
> +      break;
> +    case 0b0010:
> +      description = "16KB granule supported at stage 2.";
> +      break;
> +    case 0b0011:
> +      description = "16KB granule supported at stage 2 for 52-bit address.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64mmfr0_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "64KB granule supported.";
> +      break;
> +    case 0b1111:
> +      description = "64KB granule not supported.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64mmfr0_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0001:
> +      description = "64KB granule not supported at stage 2.";
> +      break;
> +    case 0b0010:
> +      description = "64KB granule supported at stage 2.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64mmfr0_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_ExS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_ExS implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 55:48 reserved
> +
> +  bits  = "59:56";
> +  value = (aa64mmfr0_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_FGT not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_FGT implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "63:60";
> +  value = (aa64mmfr0_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_ECV not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_ECV implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_ECV implemented with extras.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +void
> +handle_aa64mmfr1_el1 (
> +  const UINT64  aa64mmfr1_el1,
> +  const UINT64  aa64pfr0_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR1_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = aa64mmfr1_el1 & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_HAFDBS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_HAFDBS implemented without dirty status support.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_HAFDBS implemented with dirty status support.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64mmfr1_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_VMID16 not implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_VMID16 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64mmfr1_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_VHE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_VHE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64mmfr1_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_HPDS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_HPDS implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_HPDS2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64mmfr1_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LOR not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LOR implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64mmfr1_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_PAN not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PAN implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_PAN2 implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_PAN3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // when FEAT_RAS implemented
> +  if ((((aa64pfr0_el1 >> 28) & 0xf) == 0b0001) ||
> +      (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010))
> +  {
> +    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 ) {
> +      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
> +      print_text ("", "", "", "an External abort on a speculative read.");
> +    }
> +
> +    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 ) {
> +      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
> +      print_text ("", "", "", "an External abort on a speculative read.");
> +    }
> +  }
> +
> +  bits  = "31:28";
> +  value = (aa64mmfr1_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_XNX not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_XNX implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64mmfr1_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TWED not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TWED implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64mmfr1_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_ETS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_ETS implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64mmfr1_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_HCX not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_HCX implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64mmfr1_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_AFP not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_AFP implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "51:48";
> +  value = (aa64mmfr1_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_nTLBPA not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_nTLBPA implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64mmfr1_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TIDCP1 not implemented";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TIDCP1 implemented";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "59:56";
> +  value = (aa64mmfr1_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_CMOW not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_CMOW implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 63:60 reserved
> +}
> +
> +void
> +handle_aa64mmfr2_el1 (
> +  const UINT64  aa64mmfr2_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR2_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = (aa64mmfr2_el1)       & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TTCNP not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TTCNP implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64mmfr2_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_UAO not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_UAO implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64mmfr2_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LSMAOC not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LSMAOC implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64mmfr2_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_IESB not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_IESB implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64mmfr2_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LVA not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LVA implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64mmfr2_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_CCIDX not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_CCIDX implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64mmfr2_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_NV not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_NV implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_NV2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64mmfr2_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TTST not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TTST implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64mmfr2_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LSE2 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LSE2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64mmfr2_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_IDST not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_IDST implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64mmfr2_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_S2FWB not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_S2FWB implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 47:44 reserved
> +
> +  bits  = "51:48";
> +  value = (aa64mmfr2_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TTL not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TTL implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64mmfr2_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_BBM: Level 0 support for changing block size is supported.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_BBM: Level 1 support for changing block size is supported.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_BBM: Level 2 support for changing block size is supported.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "59:56";
> +  value = (aa64mmfr2_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_EVT not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "63:60";
> +  value = (aa64mmfr2_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_E0PD not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_E0PD implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +void
> +handle_aa64pfr0_el1 (
> +  const UINT64  aa64pfr0_el1,
> +  const UINT64  aa64pfr1_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR0_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = (aa64pfr0_el1)       & 0xf;
> +  switch (value) {
> +    case 0b0001:
> +      description = "EL0 in AArch64 only";
> +      break;
> +    case 0b0010:
> +      description = "EL0 in AArch64 and AArch32";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64pfr0_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0001:
> +      description = "EL1 in AArch64 only";
> +      break;
> +    case 0b0010:
> +      description = "EL1 in AArch64 and AArch32";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64pfr0_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "EL2 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "EL2 in AArch64 only";
> +      break;
> +    case 0b0010:
> +      description = "EL2 in AArch64 and AArch32";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64pfr0_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "EL3 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "EL3 in AArch64 only";
> +      break;
> +    case 0b0010:
> +      description = "EL3 in AArch64 and AArch32";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64pfr0_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Floating-point implemented.";
> +      break;
> +    case 0b0001:
> +      description = "Floating-point with half-precision support  (FEAT_FP16).";
> +      break;
> +    case 0b1111:
> +      description = "Floating-point not implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64pfr0_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Advanced SIMD implemented.";
> +      break;
> +    case 0b0001:
> +      description = "Advanced SIMD with half precision support  (FEAT_FP16).";
> +      break;
> +    case 0b1111:
> +      description = "Advanced SIMD not implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64pfr0_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "System registers of GIC CPU not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
> +      break;
> +    case 0b0011:
> +      description = "System registers to versions 4.1 of GIC CPU implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64pfr0_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RAS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RAS implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_RASv1p1 implemented.";
> +      // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
> +      if ((((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
> +          (((aa64pfr0_el1 >> 12) & 0xf) == 0b0010))
> +      {
> +        description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
> +      }
> +
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64pfr0_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SVE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SVE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64pfr0_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Secure EL2 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "Secure EL2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64pfr0_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
> +        description = "FEAT_MPAM not implemented.";
> +      }
> +
> +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
> +        description = "FEAT_MPAM v0.1 implemented.";
> +      }
> +
> +      break;
> +    case 0b0001:
> +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
> +        description = "FEAT_MPAM v1.0 implemented.";
> +      }
> +
> +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
> +        description = "FEAT_MPAM v1.1 implemented.";
> +      }
> +
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64pfr0_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_AMU not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_AMUv1 implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_AMUv1p1 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "51:48";
> +  value = (aa64pfr0_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_DIT not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_DIT implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64pfr0_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RME not implemented";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RME implemented";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "59:56";
> +  value = (aa64pfr0_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "no info is FEAT_CSV2 implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_CSV2 implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_CSV2_2 implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_CSV2_3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +  if (value == 0b0001) {
> +    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 ) {
> +      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
> +    }
> +
> +    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 ) {
> +      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
> +    }
> +  }
> +
> +  bits  = "63:60";
> +  value = (aa64pfr0_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_CSV3 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_CSV3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +void
> +handle_aa64pfr1_el1 (
> +  const UINT64  aa64pfr1_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR1_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = aa64pfr1_el1 & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_BTI not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_BTI implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64pfr1_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SSBS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SSBS implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_SSBS2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64pfr1_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_MTE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_MTE implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_MTE2 implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_MTE3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 15:12 is RAS_frac
> +  // 19:16 is MPAM_frac
> +  // 23:20 is reserved
> +
> +  bits  = "27:24";
> +  value = (aa64pfr1_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SME not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SME implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64pfr1_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RNG_TRAP not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RNG_TRAP implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 35:32 is CSV2_frac
> +
> +  bits  = "39:36";
> +  value = (aa64pfr1_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_NMI not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_NMI implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 63:40 are reserved
> +}
> +
> +void
> +handle_aa64isar0_el1 (
> +  const UINT64  aa64isar0_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR0_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  // 3:0 reserved
> +
> +  bits  = "7:4 ";
> +  value = (aa64isar0_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_AES, FEAT_PMULL not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_AES implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_AES and FEAT_PMULL implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64isar0_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SHA1 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SHA1 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64isar0_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SHA256 implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_SHA512 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64isar0_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "CRC32 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "CRC32 instructions implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64isar0_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LSE not implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_LSE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64isar0_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "TME instructions not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "TME instructions implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64isar0_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RDM not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RDM implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64isar0_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SHA3 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SHA3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64isar0_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SM3 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SM3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64isar0_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SM4 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SM4 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64isar0_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_DotProd not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_DotProd implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "51:48";
> +  value = (aa64isar0_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_FHM not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_FHM implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64isar0_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_FlagM implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_FlagM2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "59:56";
> +  value = (aa64isar0_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TLBIOS implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_TLBIRANGE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "63:60";
> +  value = (aa64isar0_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RNG not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RNG implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +void
> +handle_aa64isar1_el1 (
> +  const UINT64  aa64isar1_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR1_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = (aa64isar1_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "DC CVAP not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_DPB implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_DPB2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64isar1_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Address Authentication  (APA) not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PAuth implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_EPAC implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_PAuth2 implemented.";
> +      break;
> +    case 0b0100:
> +      description = "FEAT_FPAC implemented.";
> +      break;
> +    case 0b0101:
> +      description = "FEAT_FPACCOMBINE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +  if (value > 0) {
> +    print_text ("", "", "", "FEAT_PACQARMA5 implemented.");
> +  }
> +
> +  bits  = "11:8 ";
> +  value = (aa64isar1_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Address Authentication  (API) not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PAuth implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_EPAC implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_PAuth2 implemented.";
> +      break;
> +    case 0b0100:
> +      description = "FEAT_FPAC implemented.";
> +      break;
> +    case 0b0101:
> +      description = "FEAT_FPACCOMBINE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +  if (value > 0) {
> +    print_text ("", "", "", "FEAT_PACIMP implemented.");
> +  }
> +
> +  bits  = "15:12";
> +  value = (aa64isar1_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_JSCVT not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_JSCVT implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64isar1_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_FCMA not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_FCMA implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64isar1_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LRCPC (2) not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LRCPC implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_LRCPC2 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64isar1_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_PACQARMA5 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PACQARMA5 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "31:28";
> +  value = (aa64isar1_el1 >> 28) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_PACIMP not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PACIMP implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64isar1_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_FRINTTS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_FRINTTS implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64isar1_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SB not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SB implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64isar1_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SPECRES not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SPECRES implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64isar1_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_BF16 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_BF16 implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_EBF16 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "51:48";
> +  value = (aa64isar1_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_DGH not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_DGH implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64isar1_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_I8MM not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_I8MM implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "59:56";
> +  value = (aa64isar1_el1 >> 56) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_XS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_XS implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "63:60";
> +  value = (aa64isar1_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_LS64 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_LS64 implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_LS64_V implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_LS64_ACCDATA implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +void
> +handle_aa64isar2_el1 (
> +  const UINT64  aa64isar2_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR2_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = (aa64isar2_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_WFxT not implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_WFxT implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64isar2_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_RPRES not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_RPRES implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64isar2_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_PACQARMA3 not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PACQARMA3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64isar2_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Address Authentication  (APA3) not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PAuth implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_EPAC implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_PAuth2 implemented.";
> +      break;
> +    case 0b0100:
> +      description = "FEAT_FPAC implemented.";
> +      break;
> +    case 0b0101:
> +      description = "FEAT_FPACCOMBINE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "19:16";
> +  value = (aa64isar2_el1 >> 16) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_MOPS not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_MOPS implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "23:20";
> +  value = (aa64isar2_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_HBC not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_HBC implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "27:24";
> +  value = (aa64isar2_el1 >> 24) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_CONSTPACFIELD not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_CONSTPACFIELD implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 63:28 reserved
> +}
> +
> +void
> +handle_aa64dfr0_el1 (
> +  const UINT64  aa64dfr0_el1
> +  )
> +{
> +  UINT64              value;
> +  STATIC CONST CHAR8  RegName[] = "ID_AA64DFR0_EL1";
> +  char                *description;
> +  char                *bits;
> +
> +  bits  = "3:0 ";
> +  value = (aa64dfr0_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0110:
> +      description = "Armv8 debug architecture";
> +      break;
> +    case 0b0111:
> +      description = "Armv8 debug architecture with VHE";
> +      break;
> +    case 0b1000:
> +      description = "FEAT_Debugv8p2 implemented.";
> +      break;
> +    case 0b1001:
> +      description = "FEAT_Debugv8p4 implemented.";
> +      break;
> +    case 0b1010:
> +      description = "FEAT_Debugv8p8 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "7:4 ";
> +  value = (aa64dfr0_el1 >>  4) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Trace unit System registers not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "Trace unit System registers implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "11:8 ";
> +  value = (aa64dfr0_el1 >>  8) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Performance Monitors Extension not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_PMUv3 implemented.";
> +      break;
> +    case 0b0100:
> +      description = "FEAT_PMUv3p1 implemented.";
> +      break;
> +    case 0b0101:
> +      description = "FEAT_PMUv3p4 implemented.";
> +      break;
> +    case 0b0110:
> +      description = "FEAT_PMUv3p5 implemented.";
> +      break;
> +    case 0b0111:
> +      description = "FEAT_PMUv3p7 implemented.";
> +      break;
> +    case 0b1000:
> +      description = "FEAT_PMUv3p8 implemented.";
> +      break;
> +    case 0b1111:
> +      description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "15:12";
> +  value = (aa64dfr0_el1 >> 12) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "reserved";
> +      break;
> +    default:
> +      description = "Number of breakpoints, minus 1.";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 19:16 reserved
> +
> +  bits  = "23:20";
> +  value = (aa64dfr0_el1 >> 20) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "reserved";
> +      break;
> +    default:
> +      description = "Number of watchpoints, minus 1.";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 27:24 reserved
> +
> +  bits  = "31:28";
> +  value = (aa64dfr0_el1 >> 28) & 0xf;
> +  switch (value) {
> +    default:
> +      description = "Number of breakpoints that are context-aware, minus 1.";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "35:32";
> +  value = (aa64dfr0_el1 >> 32) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_SPE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_SPE implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_SPEv1p1 implemented.";
> +      break;
> +    case 0b0011:
> +      description = "FEAT_SPEv1p2 implemented.";
> +      break;
> +    case 0b0100:
> +      description = "FEAT_SPEv1p3 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "39:36";
> +  value = (aa64dfr0_el1 >> 36) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_DoubleLock implemented.";
> +      break;
> +    case 0b1111:
> +      description = "FEAT_DoubleLock not implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "43:40";
> +  value = (aa64dfr0_el1 >> 40) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TRF not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TRF implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "47:44";
> +  value = (aa64dfr0_el1 >> 44) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_TRBE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_TRBE implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "51:48";
> +  value = (aa64dfr0_el1 >> 48) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_MTPMU not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
> +      break;
> +    case 0b1111:
> +      description = "FEAT_MTPMU not implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  bits  = "55:52";
> +  value = (aa64dfr0_el1 >> 52) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "FEAT_BRBE not implemented.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_BRBE implemented.";
> +      break;
> +    case 0b0010:
> +      description = "FEAT_BRBEv1p1 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +
> +  // 59:56 reserved
> +
> +  bits  = "63:60";
> +  value = (aa64dfr0_el1 >> 60) & 0xf;
> +  switch (value) {
> +    case 0b0000:
> +      description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
> +      break;
> +    case 0b0001:
> +      description = "FEAT_HPMN0 implemented.";
> +      break;
> +    default:
> +      description = "unknown";
> +      break;
> +  }
> +
> +  print_values (RegName, bits, value, description);
> +}
> +
> +EFI_STATUS
> +EFIAPI
> +UefiMain  (
> +  IN EFI_HANDLE        ImageHandle,
> +  IN EFI_SYSTEM_TABLE  *SystemTable
> +  )
> +{
> +  UINT64  aa64dfr0_el1  = read_aa64dfr0_el1 ();
> +  UINT64  aa64dfr1_el1  = read_aa64dfr1_el1 ();
> +  UINT64  aa64isar0_el1 = read_aa64isar0_el1 ();
> +  UINT64  aa64isar1_el1 = read_aa64isar1_el1 ();
> +  UINT64  aa64isar2_el1 = read_aa64isar2_el1 ();
> +  UINT64  aa64mmfr0_el1 = read_aa64mmfr0_el1 ();
> +  UINT64  aa64mmfr1_el1 = read_aa64mmfr1_el1 ();
> +  UINT64  aa64mmfr2_el1 = read_aa64mmfr2_el1 ();
> +  UINT64  aa64pfr0_el1  = read_aa64pfr0_el1 ();
> +  UINT64  aa64pfr1_el1  = read_aa64pfr1_el1 ();

EDK2 requires separation between declarations and code (something
alike old C89 semantics, but stricter). so:
    UINT64 aa64pfr1_el1;
    <...>
    aa64pfr1_el1 = read_aa64pfr1_el1 ();

> +
> +  /*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1 ();*/
> +  /*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1 ();*/

Dead Code?
> +
> +  AsciiPrint ("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
> +  AsciiPrint ("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
> +  AsciiPrint ("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
> +  AsciiPrint ("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
> +  AsciiPrint ("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
> +  AsciiPrint ("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
> +  AsciiPrint ("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
> +  AsciiPrint ("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
> +  AsciiPrint ("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
> +  AsciiPrint ("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);            // ignore

Why ignore?

> +  /*    AsciiPrint ("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
> +  /*    AsciiPrint ("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/

dead?
> +
> +  AsciiPrint ("\n");
> +  print_text ("Register", "Bits", "Value", "Feature");
> +  print_spacer ();
> +
> +  handle_aa64mmfr0_el1 (aa64mmfr0_el1);
> +  print_spacer ();
> +  handle_aa64mmfr1_el1 (aa64mmfr1_el1, aa64pfr0_el1);
> +  print_spacer ();
> +  handle_aa64mmfr2_el1 (aa64mmfr2_el1);
> +
> +  print_spacer ();
> +  handle_aa64pfr0_el1 (aa64pfr0_el1, aa64pfr1_el1);
> +  print_spacer ();
> +  handle_aa64pfr1_el1 (aa64pfr1_el1);
> +
> +  print_spacer ();
> +  handle_aa64isar0_el1 (aa64isar0_el1);
> +  print_spacer ();
> +  handle_aa64isar1_el1 (aa64isar1_el1);
> +  print_spacer ();
> +  handle_aa64isar2_el1 (aa64isar2_el1);
> +
> +  print_spacer ();
> +  handle_aa64dfr0_el1 (aa64dfr0_el1);
> +
> +  return EFI_SUCCESS;
> +}
> diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s

ASM files that require preprocessing should have a capital S here (.S vs .s)

> new file mode 100644
> index 000000000000..052834b3c3f2
> --- /dev/null
> +++ b/ArmPkg/Application/ArmCpuInfo/readregs.s
> @@ -0,0 +1,49 @@
> +#include <AsmMacroIoLibV8.h>
> +
> +ASM_FUNC(read_aa64pfr0_el1)
> +        mrs x0, ID_AA64PFR0_EL1;
> +        ret;

ASM lines (for GAS at least) don't usually end in semicolons. so
   +ASM_FUNC(read_aa64pfr0_el1)
   +        mrs x0, ID_AA64PFR0_EL1
   +        ret

You'd only need the semicolons if you had multiple instructions in one
line (like mrs x0, ID_AA...; ret)

> +
> +ASM_FUNC(read_aa64pfr1_el1)
> +        mrs x0, ID_AA64PFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64dfr0_el1)
> +        mrs x0, ID_AA64DFR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64dfr1_el1)
> +        mrs x0, ID_AA64DFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar0_el1)
> +        mrs x0, ID_AA64ISAR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar1_el1)
> +        mrs x0, ID_AA64ISAR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64isar2_el1)
> +        mrs x0, ID_AA64ISAR2_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr0_el1)
> +        mrs x0, ID_AA64MMFR0_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr1_el1)
> +        mrs x0, ID_AA64MMFR1_EL1;
> +        ret;
> +
> +ASM_FUNC(read_aa64mmfr2_el1)
> +        mrs x0, ID_AA64MMFR2_EL1;
> +        ret;
> +
> +# ASM_FUNC(read_aa64zfr0_el1)
> +#     mrs x0, ID_AA64ZFR0_EL1;
> +#     ret;
> +
> +# ASM_FUNC(read_aa64smfr0_el1)
> +#     mrs x0, ID_AA64SMFR0_EL1;
> +#     ret;

Dead code?

> --
> 2.40.0

Marcin,

Brief comments in general:
1) You use binary literals extensively, which are not portable (GNU C
extension, AFAIK not in MSVC)

2) Naming of identifiers (vars, functions, etc) needs to follow the
EDK2 style. eg:
    description vs Description
    read_aa64mmfr1_el1 vs ReadAa64MmfrEl1
    etc...

-- 
Pedro


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102695): https://edk2.groups.io/g/devel/message/102695
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
W dniu 7.04.2023 o 15:02, Pedro Falcato pisze:

>> +EFI_STATUS
>> +EFIAPI
>> +UefiMain  (
>> +  IN EFI_HANDLE        ImageHandle,
>> +  IN EFI_SYSTEM_TABLE  *SystemTable
>> +  )
>> +{
>> +  UINT64  aa64dfr0_el1  = read_aa64dfr0_el1 ();
>> +  UINT64  aa64dfr1_el1  = read_aa64dfr1_el1 ();
>> +  UINT64  aa64isar0_el1 = read_aa64isar0_el1 ();
>> +  UINT64  aa64isar1_el1 = read_aa64isar1_el1 ();
>> +  UINT64  aa64isar2_el1 = read_aa64isar2_el1 ();
>> +  UINT64  aa64mmfr0_el1 = read_aa64mmfr0_el1 ();
>> +  UINT64  aa64mmfr1_el1 = read_aa64mmfr1_el1 ();
>> +  UINT64  aa64mmfr2_el1 = read_aa64mmfr2_el1 ();
>> +  UINT64  aa64pfr0_el1  = read_aa64pfr0_el1 ();
>> +  UINT64  aa64pfr1_el1  = read_aa64pfr1_el1 ();
> 
> EDK2 requires separation between declarations and code (something
> alike old C89 semantics, but stricter). so:
>      UINT64 aa64pfr1_el1;
>      <...>
>      aa64pfr1_el1 = read_aa64pfr1_el1 ();

done

>> +
>> +  /*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1 ();*/
>> +  /*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1 ();*/
> 
> Dead Code?

I ignore SVE/SME registers for now. Dropped code.

>> +
>> +  AsciiPrint ("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
>> +  AsciiPrint ("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
>> +  AsciiPrint ("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
>> +  AsciiPrint ("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
>> +  AsciiPrint ("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
>> +  AsciiPrint ("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
>> +  AsciiPrint ("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
>> +  AsciiPrint ("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
>> +  AsciiPrint ("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
>> +  AsciiPrint ("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);            // ignore
> 
> Why ignore?

Was 0 on systems I checked. Dropped.

>> +  /*    AsciiPrint ("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
>> +  /*    AsciiPrint ("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
> 
> dead?

Dropped.

>> diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s
> 
> ASM files that require preprocessing should have a capital S here (.S vs .s)

After renaming it to readregs.S (and changing in ArmCpuInfo.inf) I get:

build.py...
/home/marcin/devel/linaro/sbsa-qemu/code/edk2/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf(29): 
error 000E: File/directory not found in workspace
         readregs.S is not found in packages path:

>> new file mode 100644
>> index 000000000000..052834b3c3f2
>> --- /dev/null
>> +++ b/ArmPkg/Application/ArmCpuInfo/readregs.s
>> @@ -0,0 +1,49 @@
>> +#include <AsmMacroIoLibV8.h>
>> +
>> +ASM_FUNC(read_aa64pfr0_el1)
>> +        mrs x0, ID_AA64PFR0_EL1;
>> +        ret;
> 
> ASM lines (for GAS at least) don't usually end in semicolons. so
>     +ASM_FUNC(read_aa64pfr0_el1)
>     +        mrs x0, ID_AA64PFR0_EL1
>     +        ret
> 
> You'd only need the semicolons if you had multiple instructions in one
> line (like mrs x0, ID_AA...; ret)

thanks, dropped semicolons

>> +# ASM_FUNC(read_aa64zfr0_el1)
>> +#     mrs x0, ID_AA64ZFR0_EL1;
>> +#     ret;
>> +
>> +# ASM_FUNC(read_aa64smfr0_el1)
>> +#     mrs x0, ID_AA64SMFR0_EL1;
>> +#     ret;
> 
> Dead code?

Those two registers names were missing so got disabled. Dropped.


> Brief comments in general:
> 1) You use binary literals extensively, which are not portable (GNU C
> extension, AFAIK not in MSVC)

My C skills are rusty and the last time I used compiler other than GCC 
was in Borland Turbo C 3 times.

> 2) Naming of identifiers (vars, functions, etc) needs to follow the
> EDK2 style. eg:
>      description vs Description
>      read_aa64mmfr1_el1 vs ReadAa64MmfrEl1
>      etc...

ok

 > Forgot mentioning: STATIC vs static, CONST vs const,
 > VOID vs void, CHAR8 vs char, etc.
 > All fun microsoftisms you need to use here.

Will be fun.



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102699): https://edk2.groups.io/g/devel/message/102699
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-


Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Pedro Falcato 1 year ago
(+cc old CCs)

(Marcin, you're dropping CC's on your replies)

On Fri, Apr 7, 2023 at 2:29 PM Marcin Juszkiewicz
<marcin.juszkiewicz@linaro.org> wrote:
>
> W dniu 7.04.2023 o 15:02, Pedro Falcato pisze:
>
> >> diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s
> >
> > ASM files that require preprocessing should have a capital S here (.S vs .s)
>
> After renaming it to readregs.S (and changing in ArmCpuInfo.inf) I get:
>
> build.py...
> /home/marcin/devel/linaro/sbsa-qemu/code/edk2/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf(29):
> error 000E: File/directory not found in workspace
>          readregs.S is not found in packages path:
>

Odd. Other packages (e.g ArmPkg/Library/ArmMmuLib/ArmMmuBaseLib.inf)
use .S just fine.

Leif, Ard, any ideas?

-- 
Pedro


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102700): https://edk2.groups.io/g/devel/message/102700
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Pedro Falcato 1 year ago
Oops, now I screwed up the CC's, apologies.

On Fri, Apr 7, 2023 at 2:40 PM Pedro Falcato <pedro.falcato@gmail.com> wrote:
>
> (+cc old CCs)
>
> (Marcin, you're dropping CC's on your replies)
>
> On Fri, Apr 7, 2023 at 2:29 PM Marcin Juszkiewicz
> <marcin.juszkiewicz@linaro.org> wrote:
> >
> > W dniu 7.04.2023 o 15:02, Pedro Falcato pisze:
> >
> > >> diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s
> > >
> > > ASM files that require preprocessing should have a capital S here (.S vs .s)
> >
> > After renaming it to readregs.S (and changing in ArmCpuInfo.inf) I get:
> >
> > build.py...
> > /home/marcin/devel/linaro/sbsa-qemu/code/edk2/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf(29):
> > error 000E: File/directory not found in workspace
> >          readregs.S is not found in packages path:
> >
>
> Odd. Other packages (e.g ArmPkg/Library/ArmMmuLib/ArmMmuBaseLib.inf)
> use .S just fine.
>
> Leif, Ard, any ideas?
>
> --
> Pedro



-- 
Pedro


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102701): https://edk2.groups.io/g/devel/message/102701
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
W dniu 7.04.2023 o 15:40, Pedro Falcato pisze:
> (+cc old CCs)
> 
> (Marcin, you're dropping CC's on your replies)

Oops, sorry.

>>> ASM files that require preprocessing should have a capital S here (.S vs .s)
>>
>> After renaming it to readregs.S (and changing in ArmCpuInfo.inf) I get:
>>
>> build.py...
>> /home/marcin/devel/linaro/sbsa-qemu/code/edk2/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf(29):
>> error 000E: File/directory not found in workspace
>>           readregs.S is not found in packages path:
>>
> 
> Odd. Other packages (e.g ArmPkg/Library/ArmMmuLib/ArmMmuBaseLib.inf)
> use .S just fine.

Sorted out. Will send v4 later.



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102702): https://edk2.groups.io/g/devel/message/102702
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-


Re: [edk2-devel] [PATCH v3] add ArmCpuInfo EFI application
Posted by Pedro Falcato 1 year ago
Forgot mentioning: STATIC vs static, CONST vs const, VOID vs void,
CHAR8 vs char, etc. All fun microsoftisms you need to use here.

On Fri, Apr 7, 2023 at 2:02 PM Pedro Falcato <pedro.falcato@gmail.com> wrote:
>
> On Fri, Apr 7, 2023 at 1:47 PM Marcin Juszkiewicz
> <marcin.juszkiewicz@linaro.org> wrote:
> >
> > App goes through ID_AA64*_EL1 system registers and decode their values.
> >
> > Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
> > ---
> >  ArmPkg/ArmPkg.dsc                            |    1 +
> >  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
> >  ArmPkg/Application/ArmCpuInfo/readargs.h     |   12 +
> >  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2317 ++++++++++++++++++++
> >  ArmPkg/Application/ArmCpuInfo/readregs.s     |   49 +
> >  5 files changed, 2417 insertions(+)
> >
> > diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
> > index 3fb95d1951a9..6b938ce8b671 100644
> > --- a/ArmPkg/ArmPkg.dsc
> > +++ b/ArmPkg/ArmPkg.dsc
> > @@ -166,6 +166,7 @@ [Components.AARCH64]
> >    ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.inf
> >    ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.inf
> >    ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf
> > +  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> >
> >  [Components.AARCH64, Components.ARM]
> >    ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
> > diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> > new file mode 100644
> > index 000000000000..158f86a4740c
> > --- /dev/null
> > +++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
> > @@ -0,0 +1,38 @@
> > +## @file
> > +#
> > +#  Attempt to have AArch64 cpu information.
> > +#
> > +#  Based on HelloWorld:
> > +#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
> > +#  Copyright (c) 2023 Marcin Juszkiewicz
> > +#
> > +#  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +#
> > +#
> > +##
> > +
> > +[Defines]
> > +  INF_VERSION                    = 0x00010019
> > +  BASE_NAME                      = ArmCpuInfo
> > +  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
> > +  MODULE_TYPE                    = UEFI_APPLICATION
> > +  VERSION_STRING                 = 1.0
> > +  ENTRY_POINT                    = UefiMain
> > +
> > +#
> > +#  This flag specifies whether HII resource section is generated into PE image.
> > +#
> > +  UEFI_HII_RESOURCE_SECTION      = TRUE
> > +
> > +[Sources]
> > +  ArmCpuInfo.c
> > +  readregs.s
> > +
> > +[Packages]
> > +  ArmPkg/ArmPkg.dec
> > +  MdePkg/MdePkg.dec
> > +  MdeModulePkg/MdeModulePkg.dec
> > +
> > +[LibraryClasses]
> > +  UefiApplicationEntryPoint
> > +  UefiLib
> > diff --git a/ArmPkg/Application/ArmCpuInfo/readargs.h b/ArmPkg/Application/ArmCpuInfo/readargs.h
> > new file mode 100644
> > index 000000000000..eaa52cf16145
> > --- /dev/null
> > +++ b/ArmPkg/Application/ArmCpuInfo/readargs.h
> > @@ -0,0 +1,12 @@
> > +UINT64 read_aa64pfr0_el1(void);
> > +UINT64 read_aa64pfr1_el1(void);
> > +UINT64 read_aa64dfr0_el1(void);
> > +UINT64 read_aa64dfr1_el1(void);
> > +UINT64 read_aa64isar0_el1(void);
> > +UINT64 read_aa64isar1_el1(void);
> > +UINT64 read_aa64isar2_el1(void);
> > +UINT64 read_aa64mmfr0_el1(void);
> > +UINT64 read_aa64mmfr1_el1(void);
> > +UINT64 read_aa64mmfr2_el1(void);
> > +UINT64 read_aa64smfr0_el1(void);
> > +UINT64 read_aa64zfr0_el1(void);
> > diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
> > new file mode 100644
> > index 000000000000..6c31ad4dbcb9
> > --- /dev/null
> > +++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
> > @@ -0,0 +1,2317 @@
> > +/** @file
> > +
> > +  Copyright  (c) 2023 Marcin Juszkiewicz
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > + **/
> > +
> > +#include <Library/UefiLib.h>
> > +#include "readargs.h"
> > +
> > +void
> > +print_text (
> > +  const char  *field,
> > +  const char  *bits,
> > +  const char  *value,
> > +  const char  *description
> > +  )
> > +{
> > +  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, value, description);
> > +}
> > +
> > +void
> > +print_values (
> > +  const char  *field,
> > +  const char  *bits,
> > +  const int   value,
> > +  const char  *description
> > +  )
> > +{
> > +  STATIC CONST CHAR8  binaries[][5] = {
> > +    "0000", "0001", "0010", "0011",
> > +    "0100", "0101", "0110", "0111","1000",  "1001", "1010", "1011",
> > +    "1100", "1101", "1110", "1111"
> > +  };
> > +
> > +  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, bits, binaries[value & 0xf], description);
> > +}
> > +
> > +void
> > +print_spacer (
> > +  void
> > +  )
> > +{
> > +  AsciiPrint ("------------------|-------|-------|----------------------------------------------\n");
> > +}
> > +
> > +void
> > +handle_aa64mmfr0_el1 (
> > +  const UINT64  aa64mmfr0_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR0_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = aa64mmfr0_el1 & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "32 bits  (4GB) of physical address range supported.";
> > +      break;
> > +    case 0b0001:
> > +      description = "36 bits  (64GB) of physical address range supported.";
> > +      break;
> > +    case 0b0010:
> > +      description = "40 bits  (1TB) of physical address range supported.";
> > +      break;
> > +    case 0b0011:
> > +      description = "42 bits  (4TB) of physical address range supported.";
> > +      break;
> > +    case 0b0100:
> > +      description = "44 bits  (16TB) of physical address range supported.";
> > +      break;
> > +    case 0b0101:
> > +      description = "48 bits  (256TB) of physical address range supported.";
> > +      break;
> > +    case 0b0110:
> > +      description = "52 bits  (4PB) of physical address range supported.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +  if (value == 0b0110) {
> > +    print_text ("", "", "", "FEAT_LPA implemented.");
> > +  }
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64mmfr0_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "ASID: 8 bits";
> > +      break;
> > +    case 0b0010:
> > +      description = "ASID: 16 bits";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64mmfr0_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "No mixed-endian support.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Mixed-endian support.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // only valid for BigEnd != 0b0000
> > +  if (((aa64mmfr0_el1 >>  8) & 0xf) != 0b0000 ) {
> > +    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0000 ) {
> > +      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0000, "No mixed-endian support at EL0.");
> > +    }
> > +
> > +    if (((aa64mmfr0_el1 >> 16) & 0xf) == 0b0001 ) {
> > +      print_values ("ID_AA64MMFR0_EL1", "19:16", 0b0001, "Mixed-endian support at EL0.");
> > +    }
> > +  }
> > +
> > +  bits  = "15:12";
> > +  value = (aa64mmfr0_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "No support for a distinction between Secure and Non-Secure Memory.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Supports a distinction between Secure and Non-Secure Memory.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64mmfr0_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = " 4KB granule supported.";
> > +      break;
> > +    case 0b1111:
> > +      description = " 4KB granule not supported.";
> > +      break;
> > +    case 0b0001:             // add FEAT_LPA2 check
> > +      description = " 4KB granule supported for 52-bit address.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64mmfr0_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0001:
> > +      description = " 4KB granule not supported at stage 2.";
> > +      break;
> > +    case 0b0010:
> > +      description = " 4KB granule supported at stage 2.";
> > +      break;
> > +    case 0b0011:
> > +      description = " 4KB granule supported at stage 2 for 52-bit address.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64mmfr0_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "16KB granule not supported.";
> > +      break;
> > +    case 0b0001:
> > +      description = "16KB granule supported.";
> > +      break;
> > +    case 0b0010:             // add FEAT_LPA2 check
> > +      description = "16KB granule supported for 52-bit address.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64mmfr0_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0001:
> > +      description = "16KB granule not supported at stage 2.";
> > +      break;
> > +    case 0b0010:
> > +      description = "16KB granule supported at stage 2.";
> > +      break;
> > +    case 0b0011:
> > +      description = "16KB granule supported at stage 2 for 52-bit address.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64mmfr0_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "64KB granule supported.";
> > +      break;
> > +    case 0b1111:
> > +      description = "64KB granule not supported.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64mmfr0_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0001:
> > +      description = "64KB granule not supported at stage 2.";
> > +      break;
> > +    case 0b0010:
> > +      description = "64KB granule supported at stage 2.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64mmfr0_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_ExS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_ExS implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 55:48 reserved
> > +
> > +  bits  = "59:56";
> > +  value = (aa64mmfr0_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_FGT not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_FGT implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "63:60";
> > +  value = (aa64mmfr0_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_ECV not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_ECV implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_ECV implemented with extras.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +void
> > +handle_aa64mmfr1_el1 (
> > +  const UINT64  aa64mmfr1_el1,
> > +  const UINT64  aa64pfr0_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR1_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = aa64mmfr1_el1 & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_HAFDBS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_HAFDBS implemented without dirty status support.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_HAFDBS implemented with dirty status support.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64mmfr1_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_VMID16 not implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_VMID16 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64mmfr1_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_VHE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_VHE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64mmfr1_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_HPDS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_HPDS implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_HPDS2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64mmfr1_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LOR not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LOR implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64mmfr1_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_PAN not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PAN implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_PAN2 implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_PAN3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // when FEAT_RAS implemented
> > +  if ((((aa64pfr0_el1 >> 28) & 0xf) == 0b0001) ||
> > +      (((aa64pfr0_el1 >> 28) & 0xf) == 0b0010))
> > +  {
> > +    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0000 ) {
> > +      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
> > +      print_text ("", "", "", "an External abort on a speculative read.");
> > +    }
> > +
> > +    if (((aa64mmfr1_el1 >> 24) & 0xf) == 0b0001 ) {
> > +      print_values ("ID_AA64MMFR1_EL1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
> > +      print_text ("", "", "", "an External abort on a speculative read.");
> > +    }
> > +  }
> > +
> > +  bits  = "31:28";
> > +  value = (aa64mmfr1_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_XNX not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_XNX implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64mmfr1_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TWED not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TWED implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64mmfr1_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_ETS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_ETS implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64mmfr1_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_HCX not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_HCX implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64mmfr1_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_AFP not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_AFP implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "51:48";
> > +  value = (aa64mmfr1_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_nTLBPA not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_nTLBPA implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64mmfr1_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TIDCP1 not implemented";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TIDCP1 implemented";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "59:56";
> > +  value = (aa64mmfr1_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_CMOW not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_CMOW implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 63:60 reserved
> > +}
> > +
> > +void
> > +handle_aa64mmfr2_el1 (
> > +  const UINT64  aa64mmfr2_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR2_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = (aa64mmfr2_el1)       & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TTCNP not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TTCNP implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64mmfr2_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_UAO not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_UAO implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64mmfr2_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LSMAOC not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LSMAOC implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64mmfr2_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_IESB not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_IESB implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64mmfr2_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LVA not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LVA implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64mmfr2_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_CCIDX not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_CCIDX implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64mmfr2_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_NV not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_NV implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_NV2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64mmfr2_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TTST not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TTST implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64mmfr2_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LSE2 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LSE2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64mmfr2_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_IDST not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_IDST implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64mmfr2_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_S2FWB not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_S2FWB implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 47:44 reserved
> > +
> > +  bits  = "51:48";
> > +  value = (aa64mmfr2_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TTL not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TTL implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64mmfr2_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_BBM: Level 0 support for changing block size is supported.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_BBM: Level 1 support for changing block size is supported.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_BBM: Level 2 support for changing block size is supported.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "59:56";
> > +  value = (aa64mmfr2_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_EVT not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "63:60";
> > +  value = (aa64mmfr2_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_E0PD not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_E0PD implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +void
> > +handle_aa64pfr0_el1 (
> > +  const UINT64  aa64pfr0_el1,
> > +  const UINT64  aa64pfr1_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR0_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = (aa64pfr0_el1)       & 0xf;
> > +  switch (value) {
> > +    case 0b0001:
> > +      description = "EL0 in AArch64 only";
> > +      break;
> > +    case 0b0010:
> > +      description = "EL0 in AArch64 and AArch32";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64pfr0_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0001:
> > +      description = "EL1 in AArch64 only";
> > +      break;
> > +    case 0b0010:
> > +      description = "EL1 in AArch64 and AArch32";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64pfr0_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "EL2 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "EL2 in AArch64 only";
> > +      break;
> > +    case 0b0010:
> > +      description = "EL2 in AArch64 and AArch32";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64pfr0_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "EL3 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "EL3 in AArch64 only";
> > +      break;
> > +    case 0b0010:
> > +      description = "EL3 in AArch64 and AArch32";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64pfr0_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Floating-point implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Floating-point with half-precision support  (FEAT_FP16).";
> > +      break;
> > +    case 0b1111:
> > +      description = "Floating-point not implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64pfr0_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Advanced SIMD implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Advanced SIMD with half precision support  (FEAT_FP16).";
> > +      break;
> > +    case 0b1111:
> > +      description = "Advanced SIMD not implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64pfr0_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "System registers of GIC CPU not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "System registers to versions 4.1 of GIC CPU implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64pfr0_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RAS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RAS implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_RASv1p1 implemented.";
> > +      // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
> > +      if ((((aa64pfr0_el1 >> 12) & 0xf) == 0b0001) ||
> > +          (((aa64pfr0_el1 >> 12) & 0xf) == 0b0010))
> > +      {
> > +        description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
> > +      }
> > +
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64pfr0_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SVE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SVE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64pfr0_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Secure EL2 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Secure EL2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64pfr0_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
> > +        description = "FEAT_MPAM not implemented.";
> > +      }
> > +
> > +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
> > +        description = "FEAT_MPAM v0.1 implemented.";
> > +      }
> > +
> > +      break;
> > +    case 0b0001:
> > +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0000 ) {
> > +        description = "FEAT_MPAM v1.0 implemented.";
> > +      }
> > +
> > +      if (((aa64pfr1_el1 >> 16) & 0xf) == 0b0001 ) {
> > +        description = "FEAT_MPAM v1.1 implemented.";
> > +      }
> > +
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64pfr0_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_AMU not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_AMUv1 implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_AMUv1p1 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "51:48";
> > +  value = (aa64pfr0_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_DIT not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_DIT implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64pfr0_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RME not implemented";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RME implemented";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "59:56";
> > +  value = (aa64pfr0_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "no info is FEAT_CSV2 implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_CSV2 implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_CSV2_2 implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_CSV2_3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +  if (value == 0b0001) {
> > +    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0001 ) {
> > +      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
> > +    }
> > +
> > +    if (((aa64pfr1_el1 >> 32) & 0xf) == 0b0010 ) {
> > +      print_values ("ID_AA64PRF1_EL1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
> > +    }
> > +  }
> > +
> > +  bits  = "63:60";
> > +  value = (aa64pfr0_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_CSV3 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_CSV3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +void
> > +handle_aa64pfr1_el1 (
> > +  const UINT64  aa64pfr1_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR1_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = aa64pfr1_el1 & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_BTI not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_BTI implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64pfr1_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SSBS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SSBS implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_SSBS2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64pfr1_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_MTE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_MTE implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_MTE2 implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_MTE3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 15:12 is RAS_frac
> > +  // 19:16 is MPAM_frac
> > +  // 23:20 is reserved
> > +
> > +  bits  = "27:24";
> > +  value = (aa64pfr1_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SME not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SME implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64pfr1_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RNG_TRAP not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RNG_TRAP implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 35:32 is CSV2_frac
> > +
> > +  bits  = "39:36";
> > +  value = (aa64pfr1_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_NMI not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_NMI implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 63:40 are reserved
> > +}
> > +
> > +void
> > +handle_aa64isar0_el1 (
> > +  const UINT64  aa64isar0_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR0_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  // 3:0 reserved
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64isar0_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_AES, FEAT_PMULL not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_AES implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_AES and FEAT_PMULL implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64isar0_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SHA1 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SHA1 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64isar0_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SHA256 implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_SHA512 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64isar0_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "CRC32 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "CRC32 instructions implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64isar0_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LSE not implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_LSE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64isar0_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "TME instructions not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "TME instructions implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64isar0_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RDM not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RDM implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64isar0_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SHA3 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SHA3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64isar0_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SM3 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SM3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64isar0_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SM4 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SM4 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64isar0_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_DotProd not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_DotProd implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "51:48";
> > +  value = (aa64isar0_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_FHM not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_FHM implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64isar0_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_FlagM implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_FlagM2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "59:56";
> > +  value = (aa64isar0_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TLBIOS implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_TLBIRANGE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "63:60";
> > +  value = (aa64isar0_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RNG not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RNG implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +void
> > +handle_aa64isar1_el1 (
> > +  const UINT64  aa64isar1_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR1_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = (aa64isar1_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "DC CVAP not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_DPB implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_DPB2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64isar1_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Address Authentication  (APA) not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PAuth implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_EPAC implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_PAuth2 implemented.";
> > +      break;
> > +    case 0b0100:
> > +      description = "FEAT_FPAC implemented.";
> > +      break;
> > +    case 0b0101:
> > +      description = "FEAT_FPACCOMBINE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +  if (value > 0) {
> > +    print_text ("", "", "", "FEAT_PACQARMA5 implemented.");
> > +  }
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64isar1_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Address Authentication  (API) not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PAuth implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_EPAC implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_PAuth2 implemented.";
> > +      break;
> > +    case 0b0100:
> > +      description = "FEAT_FPAC implemented.";
> > +      break;
> > +    case 0b0101:
> > +      description = "FEAT_FPACCOMBINE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +  if (value > 0) {
> > +    print_text ("", "", "", "FEAT_PACIMP implemented.");
> > +  }
> > +
> > +  bits  = "15:12";
> > +  value = (aa64isar1_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_JSCVT not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_JSCVT implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64isar1_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_FCMA not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_FCMA implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64isar1_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LRCPC (2) not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LRCPC implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_LRCPC2 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64isar1_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_PACQARMA5 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PACQARMA5 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "31:28";
> > +  value = (aa64isar1_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_PACIMP not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PACIMP implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64isar1_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_FRINTTS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_FRINTTS implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64isar1_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SB not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SB implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64isar1_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SPECRES not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SPECRES implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64isar1_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_BF16 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_BF16 implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_EBF16 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "51:48";
> > +  value = (aa64isar1_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_DGH not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_DGH implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64isar1_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_I8MM not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_I8MM implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "59:56";
> > +  value = (aa64isar1_el1 >> 56) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_XS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_XS implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "63:60";
> > +  value = (aa64isar1_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_LS64 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_LS64 implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_LS64_V implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_LS64_ACCDATA implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +void
> > +handle_aa64isar2_el1 (
> > +  const UINT64  aa64isar2_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR2_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = (aa64isar2_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_WFxT not implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_WFxT implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64isar2_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_RPRES not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_RPRES implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64isar2_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_PACQARMA3 not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PACQARMA3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64isar2_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Address Authentication  (APA3) not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PAuth implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_EPAC implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_PAuth2 implemented.";
> > +      break;
> > +    case 0b0100:
> > +      description = "FEAT_FPAC implemented.";
> > +      break;
> > +    case 0b0101:
> > +      description = "FEAT_FPACCOMBINE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "19:16";
> > +  value = (aa64isar2_el1 >> 16) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_MOPS not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_MOPS implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "23:20";
> > +  value = (aa64isar2_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_HBC not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_HBC implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "27:24";
> > +  value = (aa64isar2_el1 >> 24) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_CONSTPACFIELD not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_CONSTPACFIELD implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 63:28 reserved
> > +}
> > +
> > +void
> > +handle_aa64dfr0_el1 (
> > +  const UINT64  aa64dfr0_el1
> > +  )
> > +{
> > +  UINT64              value;
> > +  STATIC CONST CHAR8  RegName[] = "ID_AA64DFR0_EL1";
> > +  char                *description;
> > +  char                *bits;
> > +
> > +  bits  = "3:0 ";
> > +  value = (aa64dfr0_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0110:
> > +      description = "Armv8 debug architecture";
> > +      break;
> > +    case 0b0111:
> > +      description = "Armv8 debug architecture with VHE";
> > +      break;
> > +    case 0b1000:
> > +      description = "FEAT_Debugv8p2 implemented.";
> > +      break;
> > +    case 0b1001:
> > +      description = "FEAT_Debugv8p4 implemented.";
> > +      break;
> > +    case 0b1010:
> > +      description = "FEAT_Debugv8p8 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "7:4 ";
> > +  value = (aa64dfr0_el1 >>  4) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Trace unit System registers not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "Trace unit System registers implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "11:8 ";
> > +  value = (aa64dfr0_el1 >>  8) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Performance Monitors Extension not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_PMUv3 implemented.";
> > +      break;
> > +    case 0b0100:
> > +      description = "FEAT_PMUv3p1 implemented.";
> > +      break;
> > +    case 0b0101:
> > +      description = "FEAT_PMUv3p4 implemented.";
> > +      break;
> > +    case 0b0110:
> > +      description = "FEAT_PMUv3p5 implemented.";
> > +      break;
> > +    case 0b0111:
> > +      description = "FEAT_PMUv3p7 implemented.";
> > +      break;
> > +    case 0b1000:
> > +      description = "FEAT_PMUv3p8 implemented.";
> > +      break;
> > +    case 0b1111:
> > +      description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "15:12";
> > +  value = (aa64dfr0_el1 >> 12) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "reserved";
> > +      break;
> > +    default:
> > +      description = "Number of breakpoints, minus 1.";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 19:16 reserved
> > +
> > +  bits  = "23:20";
> > +  value = (aa64dfr0_el1 >> 20) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "reserved";
> > +      break;
> > +    default:
> > +      description = "Number of watchpoints, minus 1.";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 27:24 reserved
> > +
> > +  bits  = "31:28";
> > +  value = (aa64dfr0_el1 >> 28) & 0xf;
> > +  switch (value) {
> > +    default:
> > +      description = "Number of breakpoints that are context-aware, minus 1.";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "35:32";
> > +  value = (aa64dfr0_el1 >> 32) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_SPE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_SPE implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_SPEv1p1 implemented.";
> > +      break;
> > +    case 0b0011:
> > +      description = "FEAT_SPEv1p2 implemented.";
> > +      break;
> > +    case 0b0100:
> > +      description = "FEAT_SPEv1p3 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "39:36";
> > +  value = (aa64dfr0_el1 >> 36) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_DoubleLock implemented.";
> > +      break;
> > +    case 0b1111:
> > +      description = "FEAT_DoubleLock not implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "43:40";
> > +  value = (aa64dfr0_el1 >> 40) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TRF not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TRF implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "47:44";
> > +  value = (aa64dfr0_el1 >> 44) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_TRBE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_TRBE implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "51:48";
> > +  value = (aa64dfr0_el1 >> 48) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_MTPMU not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
> > +      break;
> > +    case 0b1111:
> > +      description = "FEAT_MTPMU not implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  bits  = "55:52";
> > +  value = (aa64dfr0_el1 >> 52) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "FEAT_BRBE not implemented.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_BRBE implemented.";
> > +      break;
> > +    case 0b0010:
> > +      description = "FEAT_BRBEv1p1 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +
> > +  // 59:56 reserved
> > +
> > +  bits  = "63:60";
> > +  value = (aa64dfr0_el1 >> 60) & 0xf;
> > +  switch (value) {
> > +    case 0b0000:
> > +      description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
> > +      break;
> > +    case 0b0001:
> > +      description = "FEAT_HPMN0 implemented.";
> > +      break;
> > +    default:
> > +      description = "unknown";
> > +      break;
> > +  }
> > +
> > +  print_values (RegName, bits, value, description);
> > +}
> > +
> > +EFI_STATUS
> > +EFIAPI
> > +UefiMain  (
> > +  IN EFI_HANDLE        ImageHandle,
> > +  IN EFI_SYSTEM_TABLE  *SystemTable
> > +  )
> > +{
> > +  UINT64  aa64dfr0_el1  = read_aa64dfr0_el1 ();
> > +  UINT64  aa64dfr1_el1  = read_aa64dfr1_el1 ();
> > +  UINT64  aa64isar0_el1 = read_aa64isar0_el1 ();
> > +  UINT64  aa64isar1_el1 = read_aa64isar1_el1 ();
> > +  UINT64  aa64isar2_el1 = read_aa64isar2_el1 ();
> > +  UINT64  aa64mmfr0_el1 = read_aa64mmfr0_el1 ();
> > +  UINT64  aa64mmfr1_el1 = read_aa64mmfr1_el1 ();
> > +  UINT64  aa64mmfr2_el1 = read_aa64mmfr2_el1 ();
> > +  UINT64  aa64pfr0_el1  = read_aa64pfr0_el1 ();
> > +  UINT64  aa64pfr1_el1  = read_aa64pfr1_el1 ();
>
> EDK2 requires separation between declarations and code (something
> alike old C89 semantics, but stricter). so:
>     UINT64 aa64pfr1_el1;
>     <...>
>     aa64pfr1_el1 = read_aa64pfr1_el1 ();
>
> > +
> > +  /*    UINT64 aa64smfr0_el1 = read_aa64smfr0_el1 ();*/
> > +  /*    UINT64 aa64zfr0_el1 = read_aa64zfr0_el1 ();*/
>
> Dead Code?
> > +
> > +  AsciiPrint ("ID_AA64MMFR0_EL1 = 0x%016lx\n", aa64mmfr0_el1);
> > +  AsciiPrint ("ID_AA64MMFR1_EL1 = 0x%016lx\n", aa64mmfr1_el1);
> > +  AsciiPrint ("ID_AA64MMFR2_EL1 = 0x%016lx\n", aa64mmfr2_el1);
> > +  AsciiPrint ("ID_AA64PFR0_EL1  = 0x%016lx\n", aa64pfr0_el1);
> > +  AsciiPrint ("ID_AA64PFR1_EL1  = 0x%016lx\n", aa64pfr1_el1);
> > +  AsciiPrint ("ID_AA64ISAR0_EL1 = 0x%016lx\n", aa64isar0_el1);
> > +  AsciiPrint ("ID_AA64ISAR1_EL1 = 0x%016lx\n", aa64isar1_el1);
> > +  AsciiPrint ("ID_AA64ISAR2_EL1 = 0x%016lx\n", aa64isar2_el1);
> > +  AsciiPrint ("ID_AA64DFR0_EL1  = 0x%016lx\n", aa64dfr0_el1);
> > +  AsciiPrint ("ID_AA64DFR1_EL1  = 0x%016lx\n", aa64dfr1_el1);            // ignore
>
> Why ignore?
>
> > +  /*    AsciiPrint ("ID_AA64SMFR0_EL1 = 0x%016lx\n", aa64smfr0_el1);*/
> > +  /*    AsciiPrint ("ID_AA64ZFR0_EL1 = 0x%016lx\n", aa64zfr0_el1);*/
>
> dead?
> > +
> > +  AsciiPrint ("\n");
> > +  print_text ("Register", "Bits", "Value", "Feature");
> > +  print_spacer ();
> > +
> > +  handle_aa64mmfr0_el1 (aa64mmfr0_el1);
> > +  print_spacer ();
> > +  handle_aa64mmfr1_el1 (aa64mmfr1_el1, aa64pfr0_el1);
> > +  print_spacer ();
> > +  handle_aa64mmfr2_el1 (aa64mmfr2_el1);
> > +
> > +  print_spacer ();
> > +  handle_aa64pfr0_el1 (aa64pfr0_el1, aa64pfr1_el1);
> > +  print_spacer ();
> > +  handle_aa64pfr1_el1 (aa64pfr1_el1);
> > +
> > +  print_spacer ();
> > +  handle_aa64isar0_el1 (aa64isar0_el1);
> > +  print_spacer ();
> > +  handle_aa64isar1_el1 (aa64isar1_el1);
> > +  print_spacer ();
> > +  handle_aa64isar2_el1 (aa64isar2_el1);
> > +
> > +  print_spacer ();
> > +  handle_aa64dfr0_el1 (aa64dfr0_el1);
> > +
> > +  return EFI_SUCCESS;
> > +}
> > diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.s b/ArmPkg/Application/ArmCpuInfo/readregs.s
>
> ASM files that require preprocessing should have a capital S here (.S vs .s)
>
> > new file mode 100644
> > index 000000000000..052834b3c3f2
> > --- /dev/null
> > +++ b/ArmPkg/Application/ArmCpuInfo/readregs.s
> > @@ -0,0 +1,49 @@
> > +#include <AsmMacroIoLibV8.h>
> > +
> > +ASM_FUNC(read_aa64pfr0_el1)
> > +        mrs x0, ID_AA64PFR0_EL1;
> > +        ret;
>
> ASM lines (for GAS at least) don't usually end in semicolons. so
>    +ASM_FUNC(read_aa64pfr0_el1)
>    +        mrs x0, ID_AA64PFR0_EL1
>    +        ret
>
> You'd only need the semicolons if you had multiple instructions in one
> line (like mrs x0, ID_AA...; ret)
>
> > +
> > +ASM_FUNC(read_aa64pfr1_el1)
> > +        mrs x0, ID_AA64PFR1_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64dfr0_el1)
> > +        mrs x0, ID_AA64DFR0_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64dfr1_el1)
> > +        mrs x0, ID_AA64DFR1_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64isar0_el1)
> > +        mrs x0, ID_AA64ISAR0_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64isar1_el1)
> > +        mrs x0, ID_AA64ISAR1_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64isar2_el1)
> > +        mrs x0, ID_AA64ISAR2_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64mmfr0_el1)
> > +        mrs x0, ID_AA64MMFR0_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64mmfr1_el1)
> > +        mrs x0, ID_AA64MMFR1_EL1;
> > +        ret;
> > +
> > +ASM_FUNC(read_aa64mmfr2_el1)
> > +        mrs x0, ID_AA64MMFR2_EL1;
> > +        ret;
> > +
> > +# ASM_FUNC(read_aa64zfr0_el1)
> > +#     mrs x0, ID_AA64ZFR0_EL1;
> > +#     ret;
> > +
> > +# ASM_FUNC(read_aa64smfr0_el1)
> > +#     mrs x0, ID_AA64SMFR0_EL1;
> > +#     ret;
>
> Dead code?
>
> > --
> > 2.40.0
>
> Marcin,
>
> Brief comments in general:
> 1) You use binary literals extensively, which are not portable (GNU C
> extension, AFAIK not in MSVC)
>
> 2) Naming of identifiers (vars, functions, etc) needs to follow the
> EDK2 style. eg:
>     description vs Description
>     read_aa64mmfr1_el1 vs ReadAa64MmfrEl1
>     etc...
>
> --
> Pedro



-- 
Pedro


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102696): https://edk2.groups.io/g/devel/message/102696
Mute This Topic: https://groups.io/mt/98123579/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-
[edk2-devel] [PATCH v4] add ArmCpuInfo EFI application
Posted by Marcin Juszkiewicz 1 year ago
App goes through ID_AA64*_EL1 system registers and decode their values.

Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
 ArmPkg/ArmPkg.dsc                            |    1 +
 ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf |   38 +
 ArmPkg/Application/ArmCpuInfo/readargs.h     |   10 +
 ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c   | 2319 ++++++++++++++++++++
 ArmPkg/Application/ArmCpuInfo/readregs.S     |   41 +
 5 files changed, 2409 insertions(+)

diff --git a/ArmPkg/ArmPkg.dsc b/ArmPkg/ArmPkg.dsc
index 3fb95d1951a9..6b938ce8b671 100644
--- a/ArmPkg/ArmPkg.dsc
+++ b/ArmPkg/ArmPkg.dsc
@@ -166,6 +166,7 @@ [Components.AARCH64]
   ArmPkg/Drivers/ArmPsciMpServicesDxe/ArmPsciMpServicesDxe.inf
   ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.inf
   ArmPkg/Library/ArmMmuLib/ArmMmuPeiLib.inf
+  ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
 
 [Components.AARCH64, Components.ARM]
   ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
new file mode 100644
index 000000000000..d80a19660a55
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.inf
@@ -0,0 +1,38 @@
+## @file
+#
+#  Attempt to have AArch64 cpu information.
+#
+#  Based on HelloWorld:
+#  Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.
+#  Copyright (c) 2023 Marcin Juszkiewicz
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010019
+  BASE_NAME                      = ArmCpuInfo
+  FILE_GUID                      = b3134491-6502-4faf-a9da-007184e32163
+  MODULE_TYPE                    = UEFI_APPLICATION
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = UefiMain
+
+#
+#  This flag specifies whether HII resource section is generated into PE image.
+#
+  UEFI_HII_RESOURCE_SECTION      = TRUE
+
+[Sources]
+  ArmCpuInfo.c
+  readregs.S
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  UefiApplicationEntryPoint
+  UefiLib
diff --git a/ArmPkg/Application/ArmCpuInfo/readargs.h b/ArmPkg/Application/ArmCpuInfo/readargs.h
new file mode 100644
index 000000000000..b154945c6562
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/readargs.h
@@ -0,0 +1,10 @@
+UINT64 ReadAa64Pfr0El1(void);
+UINT64 ReadAa64Pfr1El1(void);
+UINT64 ReadAa64Dfr0El1(void);
+UINT64 ReadAa64Dfr1El1(void);
+UINT64 ReadAa64Isar0El1(void);
+UINT64 ReadAa64Isar1El1(void);
+UINT64 ReadAa64Isar2El1(void);
+UINT64 ReadAa64Mmfr0El1(void);
+UINT64 ReadAa64Mmfr1El1(void);
+UINT64 ReadAa64Mmfr2El1(void);
diff --git a/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
new file mode 100644
index 000000000000..13f77717215d
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/ArmCpuInfo.c
@@ -0,0 +1,2319 @@
+/** @file
+
+  Copyright  (c) 2023 Marcin Juszkiewicz
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ **/
+
+#include <Library/UefiLib.h>
+#include "readargs.h"
+
+VOID
+PrintText (
+  CONST CHAR8  *field,
+  CONST CHAR8  *Bits,
+  CONST CHAR8  *Value,
+  CONST CHAR8  *Description
+  )
+{
+  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, Bits, Value, Description);
+}
+
+VOID
+PrintValues (
+  CONST CHAR8  *field,
+  CONST CHAR8  *Bits,
+  CONST UINT8  Value,
+  CONST CHAR8  *Description
+  )
+{
+  STATIC CONST CHAR8  binaries[][5] = {
+    "0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
+    "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"
+  };
+
+  AsciiPrint (" %-16a | %5a | %5a | %a\n", field, Bits, binaries[Value & 0xf], Description);
+}
+
+VOID
+PrintSpacer (
+  VOID
+  )
+{
+  AsciiPrint ("------------------|-------|-------|----------------------------------------------\n");
+}
+
+VOID
+HandleAa64Mmfr0El1 (
+  CONST UINT64  Aa64Mmfr0El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR0El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = Aa64Mmfr0El1 & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "32 Bits  (4GB) of physical address range supported.";
+      break;
+    case 0b0001:
+      Description = "36 Bits  (64GB) of physical address range supported.";
+      break;
+    case 0b0010:
+      Description = "40 Bits  (1TB) of physical address range supported.";
+      break;
+    case 0b0011:
+      Description = "42 Bits  (4TB) of physical address range supported.";
+      break;
+    case 0b0100:
+      Description = "44 Bits  (16TB) of physical address range supported.";
+      break;
+    case 0b0101:
+      Description = "48 Bits  (256TB) of physical address range supported.";
+      break;
+    case 0b0110:
+      Description = "52 Bits  (4PB) of physical address range supported.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+  if (Value == 0b0110) {
+    PrintText ("", "", "", "FEAT_LPA implemented.");
+  }
+
+  Bits  = "7:4 ";
+  Value = (Aa64Mmfr0El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "ASID: 8 Bits";
+      break;
+    case 0b0010:
+      Description = "ASID: 16 Bits";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Mmfr0El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "No mixed-endian support.";
+      break;
+    case 0b0001:
+      Description = "Mixed-endian support.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // only valid for BigEnd != 0b0000
+  if (((Aa64Mmfr0El1 >>  8) & 0xf) != 0b0000 ) {
+    if (((Aa64Mmfr0El1 >> 16) & 0xf) == 0b0000 ) {
+      PrintValues ("ID_AA64MMFR0El1", "19:16", 0b0000, "No mixed-endian support at EL0.");
+    }
+
+    if (((Aa64Mmfr0El1 >> 16) & 0xf) == 0b0001 ) {
+      PrintValues ("ID_AA64MMFR0El1", "19:16", 0b0001, "Mixed-endian support at EL0.");
+    }
+  }
+
+  Bits  = "15:12";
+  Value = (Aa64Mmfr0El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "No support for a distinction between Secure and Non-Secure Memory.";
+      break;
+    case 0b0001:
+      Description = "Supports a distinction between Secure and Non-Secure Memory.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Mmfr0El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = " 4KB granule supported.";
+      break;
+    case 0b1111:
+      Description = " 4KB granule not supported.";
+      break;
+    case 0b0001:             // add FEAT_LPA2 check
+      Description = " 4KB granule supported for 52-bit address.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Mmfr0El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0001:
+      Description = " 4KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      Description = " 4KB granule supported at stage 2.";
+      break;
+    case 0b0011:
+      Description = " 4KB granule supported at stage 2 for 52-bit address.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Mmfr0El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "16KB granule not supported.";
+      break;
+    case 0b0001:
+      Description = "16KB granule supported.";
+      break;
+    case 0b0010:             // add FEAT_LPA2 check
+      Description = "16KB granule supported for 52-bit address.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Mmfr0El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0001:
+      Description = "16KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      Description = "16KB granule supported at stage 2.";
+      break;
+    case 0b0011:
+      Description = "16KB granule supported at stage 2 for 52-bit address.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Mmfr0El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "64KB granule supported.";
+      break;
+    case 0b1111:
+      Description = "64KB granule not supported.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Mmfr0El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0001:
+      Description = "64KB granule not supported at stage 2.";
+      break;
+    case 0b0010:
+      Description = "64KB granule supported at stage 2.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Mmfr0El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_ExS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_ExS implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 55:48 reserved
+
+  Bits  = "59:56";
+  Value = (Aa64Mmfr0El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_FGT not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_FGT implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "63:60";
+  Value = (Aa64Mmfr0El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_ECV not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_ECV implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_ECV implemented with extras.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+VOID
+HandleAa64Mmfr1El1 (
+  CONST UINT64  Aa64Mmfr1El1,
+  CONST UINT64  Aa64Pfr0El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR1El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = Aa64Mmfr1El1 & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_HAFDBS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_HAFDBS implemented without dirty status support.";
+      break;
+    case 0b0010:
+      Description = "FEAT_HAFDBS implemented with dirty status support.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Mmfr1El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_VMID16 not implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_VMID16 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Mmfr1El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_VHE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_VHE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Mmfr1El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_HPDS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_HPDS implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_HPDS2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Mmfr1El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LOR not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LOR implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Mmfr1El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_PAN not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PAN implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_PAN2 implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_PAN3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // when FEAT_RAS implemented
+  if ((((Aa64Pfr0El1 >> 28) & 0xf) == 0b0001) ||
+      (((Aa64Pfr0El1 >> 28) & 0xf) == 0b0010))
+  {
+    if (((Aa64Mmfr1El1 >> 24) & 0xf) == 0b0000 ) {
+      PrintValues ("ID_AA64MMFR1El1", "27:24", 0b0000, "The PE never generates an SError interrupt due to");
+      PrintText ("", "", "", "an External abort on a speculative read.");
+    }
+
+    if (((Aa64Mmfr1El1 >> 24) & 0xf) == 0b0001 ) {
+      PrintValues ("ID_AA64MMFR1El1", "27:24", 0b0001, "The PE might generate an SError interrupt due to");
+      PrintText ("", "", "", "an External abort on a speculative read.");
+    }
+  }
+
+  Bits  = "31:28";
+  Value = (Aa64Mmfr1El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_XNX not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_XNX implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Mmfr1El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TWED not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TWED implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Mmfr1El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_ETS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_ETS implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Mmfr1El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_HCX not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_HCX implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Mmfr1El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_AFP not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_AFP implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "51:48";
+  Value = (Aa64Mmfr1El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_nTLBPA not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_nTLBPA implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Mmfr1El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TIDCP1 not implemented";
+      break;
+    case 0b0001:
+      Description = "FEAT_TIDCP1 implemented";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "59:56";
+  Value = (Aa64Mmfr1El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_CMOW not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_CMOW implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 63:60 reserved
+}
+
+VOID
+HandleAa64Mmfr2El1 (
+  CONST UINT64  Aa64Mmfr2El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64MMFR2El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = (Aa64Mmfr2El1)       & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TTCNP not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TTCNP implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Mmfr2El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_UAO not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_UAO implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Mmfr2El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LSMAOC not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LSMAOC implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Mmfr2El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_IESB not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_IESB implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Mmfr2El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LVA not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LVA implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Mmfr2El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_CCIDX not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_CCIDX implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Mmfr2El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_NV not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_NV implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_NV2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Mmfr2El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TTST not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TTST implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Mmfr2El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LSE2 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LSE2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Mmfr2El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_IDST not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_IDST implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Mmfr2El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_S2FWB not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_S2FWB implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 47:44 reserved
+
+  Bits  = "51:48";
+  Value = (Aa64Mmfr2El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TTL not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TTL implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Mmfr2El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_BBM: Level 0 support for changing block size is supported.";
+      break;
+    case 0b0001:
+      Description = "FEAT_BBM: Level 1 support for changing block size is supported.";
+      break;
+    case 0b0010:
+      Description = "FEAT_BBM: Level 2 support for changing block size is supported.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "59:56";
+  Value = (Aa64Mmfr2El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_EVT not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_EVT: HCR_EL2.{TOCU, TICAB, TID4} traps are supported.";
+      break;
+    case 0b0010:
+      Description = "FEAT_EVT: HCR_EL2.{TTLBOS, TTLSBIS, TOCU, TICAB, TID4} traps are supported.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "63:60";
+  Value = (Aa64Mmfr2El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_E0PD not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_E0PD implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+VOID
+HandleAa64Pfr0El1 (
+  CONST UINT64  Aa64Pfr0El1,
+  CONST UINT64  Aa64Pfr1El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR0El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = (Aa64Pfr0El1)       & 0xf;
+  switch (Value) {
+    case 0b0001:
+      Description = "EL0 in AArch64 only";
+      break;
+    case 0b0010:
+      Description = "EL0 in AArch64 and AArch32";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Pfr0El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0001:
+      Description = "EL1 in AArch64 only";
+      break;
+    case 0b0010:
+      Description = "EL1 in AArch64 and AArch32";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Pfr0El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "EL2 not implemented.";
+      break;
+    case 0b0001:
+      Description = "EL2 in AArch64 only";
+      break;
+    case 0b0010:
+      Description = "EL2 in AArch64 and AArch32";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Pfr0El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "EL3 not implemented.";
+      break;
+    case 0b0001:
+      Description = "EL3 in AArch64 only";
+      break;
+    case 0b0010:
+      Description = "EL3 in AArch64 and AArch32";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Pfr0El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Floating-point implemented.";
+      break;
+    case 0b0001:
+      Description = "Floating-point with half-precision support  (FEAT_FP16).";
+      break;
+    case 0b1111:
+      Description = "Floating-point not implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Pfr0El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Advanced SIMD implemented.";
+      break;
+    case 0b0001:
+      Description = "Advanced SIMD with half precision support  (FEAT_FP16).";
+      break;
+    case 0b1111:
+      Description = "Advanced SIMD not implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Pfr0El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "System registers of GIC CPU not implemented.";
+      break;
+    case 0b0001:
+      Description = "System registers to versions 3.0/4.0 of GIC CPU implemented.";
+      break;
+    case 0b0011:
+      Description = "System registers to versions 4.1 of GIC CPU implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Pfr0El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RAS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_RAS implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_RASv1p1 implemented.";
+      // 0b0010 FEAT_RASv1p1 implemented and, if EL3 is implemented, FEAT_DoubleFault implemented.
+      if ((((Aa64Pfr0El1 >> 12) & 0xf) == 0b0001) ||
+          (((Aa64Pfr0El1 >> 12) & 0xf) == 0b0010))
+      {
+        Description = "FEAT_RASv1p1 implemented. FEAT_DoubleFault implemented.";
+      }
+
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Pfr0El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SVE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SVE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Pfr0El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Secure EL2 not implemented.";
+      break;
+    case 0b0001:
+      Description = "Secure EL2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Pfr0El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      if (((Aa64Pfr1El1 >> 16) & 0xf) == 0b0000 ) {
+        Description = "FEAT_MPAM not implemented.";
+      }
+
+      if (((Aa64Pfr1El1 >> 16) & 0xf) == 0b0001 ) {
+        Description = "FEAT_MPAM v0.1 implemented.";
+      }
+
+      break;
+    case 0b0001:
+      if (((Aa64Pfr1El1 >> 16) & 0xf) == 0b0000 ) {
+        Description = "FEAT_MPAM v1.0 implemented.";
+      }
+
+      if (((Aa64Pfr1El1 >> 16) & 0xf) == 0b0001 ) {
+        Description = "FEAT_MPAM v1.1 implemented.";
+      }
+
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Pfr0El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_AMU not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_AMUv1 implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_AMUv1p1 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "51:48";
+  Value = (Aa64Pfr0El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_DIT not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_DIT implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Pfr0El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RME not implemented";
+      break;
+    case 0b0001:
+      Description = "FEAT_RME implemented";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "59:56";
+  Value = (Aa64Pfr0El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "no info is FEAT_CSV2 implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_CSV2 implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_CSV2_2 implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_CSV2_3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+  if (Value == 0b0001) {
+    if (((Aa64Pfr1El1 >> 32) & 0xf) == 0b0001 ) {
+      PrintValues ("ID_AA64PRF1El1", "35:32", 0b0001, "FEAT_CSV2_1p1 implemented.");
+    }
+
+    if (((Aa64Pfr1El1 >> 32) & 0xf) == 0b0010 ) {
+      PrintValues ("ID_AA64PRF1El1", "35:32", 0b0010, "FEAT_CSV2_1p2 implemented.");
+    }
+  }
+
+  Bits  = "63:60";
+  Value = (Aa64Pfr0El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_CSV3 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_CSV3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+VOID
+HandleAa64Pfr1El1 (
+  CONST UINT64  Aa64Pfr1El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64PFR1El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = Aa64Pfr1El1 & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_BTI not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_BTI implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Pfr1El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SSBS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SSBS implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_SSBS2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Pfr1El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_MTE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_MTE implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_MTE2 implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_MTE3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 15:12 is RAS_frac
+  // 19:16 is MPAM_frac
+  // 23:20 is reserved
+
+  Bits  = "27:24";
+  Value = (Aa64Pfr1El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SME not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SME implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Pfr1El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RNG_TRAP not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_RNG_TRAP implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 35:32 is CSV2_frac
+
+  Bits  = "39:36";
+  Value = (Aa64Pfr1El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_NMI not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_NMI implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 63:40 are reserved
+}
+
+VOID
+HandleAa64Isar0El1 (
+  CONST UINT64  Aa64Isar0El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR0El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  // 3:0 reserved
+
+  Bits  = "7:4 ";
+  Value = (Aa64Isar0El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_AES, FEAT_PMULL not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_AES implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_AES and FEAT_PMULL implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Isar0El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SHA1 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SHA1 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Isar0El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SHA256, FEAT_SHA512 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SHA256 implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_SHA512 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Isar0El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "CRC32 not implemented.";
+      break;
+    case 0b0001:
+      Description = "CRC32 instructions implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Isar0El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LSE not implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_LSE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Isar0El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "TME instructions not implemented.";
+      break;
+    case 0b0001:
+      Description = "TME instructions implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Isar0El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RDM not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_RDM implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Isar0El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SHA3 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SHA3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Isar0El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SM3 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SM3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Isar0El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SM4 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SM4 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Isar0El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_DotProd not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_DotProd implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "51:48";
+  Value = (Aa64Isar0El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_FHM not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_FHM implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Isar0El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_FlagM/FEAT_FlagM2 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_FlagM implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_FlagM2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "59:56";
+  Value = (Aa64Isar0El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TLBIOS/FEAT_TLBIRANGE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TLBIOS implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_TLBIRANGE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "63:60";
+  Value = (Aa64Isar0El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RNG not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_RNG implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+VOID
+HandleAa64Isar1El1 (
+  CONST UINT64  Aa64Isar1El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR1El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = (Aa64Isar1El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "DC CVAP not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_DPB implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_DPB2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Isar1El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Address Authentication  (APA) not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      Description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      Description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+  if (Value > 0) {
+    PrintText ("", "", "", "FEAT_PACQARMA5 implemented.");
+  }
+
+  Bits  = "11:8 ";
+  Value = (Aa64Isar1El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Address Authentication  (API) not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      Description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      Description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+  if (Value > 0) {
+    PrintText ("", "", "", "FEAT_PACIMP implemented.");
+  }
+
+  Bits  = "15:12";
+  Value = (Aa64Isar1El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_JSCVT not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_JSCVT implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Isar1El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_FCMA not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_FCMA implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Isar1El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LRCPC (2) not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LRCPC implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_LRCPC2 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Isar1El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_PACQARMA5 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PACQARMA5 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "31:28";
+  Value = (Aa64Isar1El1 >> 28) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_PACIMP not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PACIMP implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Isar1El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_FRINTTS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_FRINTTS implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Isar1El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SB not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SB implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Isar1El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SPECRES not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SPECRES implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Isar1El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_BF16 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_BF16 implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_EBF16 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "51:48";
+  Value = (Aa64Isar1El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_DGH not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_DGH implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Isar1El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_I8MM not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_I8MM implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "59:56";
+  Value = (Aa64Isar1El1 >> 56) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_XS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_XS implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "63:60";
+  Value = (Aa64Isar1El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_LS64 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_LS64 implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_LS64_V implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_LS64_ACCDATA implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+VOID
+HandleAa64Isar2El1 (
+  CONST UINT64  Aa64Isar2El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64ISAR2El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = (Aa64Isar2El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_WFxT not implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_WFxT implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Isar2El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_RPRES not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_RPRES implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Isar2El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_PACQARMA3 not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PACQARMA3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Isar2El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Address Authentication  (APA3) not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PAuth implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_EPAC implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_PAuth2 implemented.";
+      break;
+    case 0b0100:
+      Description = "FEAT_FPAC implemented.";
+      break;
+    case 0b0101:
+      Description = "FEAT_FPACCOMBINE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "19:16";
+  Value = (Aa64Isar2El1 >> 16) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_MOPS not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_MOPS implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "23:20";
+  Value = (Aa64Isar2El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_HBC not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_HBC implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "27:24";
+  Value = (Aa64Isar2El1 >> 24) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_CONSTPACFIELD not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_CONSTPACFIELD implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 63:28 reserved
+}
+
+VOID
+HandleAa64Dfr0El1 (
+  CONST UINT64  Aa64Dfr0El1
+  )
+{
+  UINT64              Value;
+  STATIC CONST CHAR8  RegName[] = "ID_AA64DFR0El1";
+  CONST CHAR8         *Description;
+  CONST CHAR8         *Bits;
+
+  Bits  = "3:0 ";
+  Value = (Aa64Dfr0El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0110:
+      Description = "Armv8 debug architecture";
+      break;
+    case 0b0111:
+      Description = "Armv8 debug architecture with VHE";
+      break;
+    case 0b1000:
+      Description = "FEAT_Debugv8p2 implemented.";
+      break;
+    case 0b1001:
+      Description = "FEAT_Debugv8p4 implemented.";
+      break;
+    case 0b1010:
+      Description = "FEAT_Debugv8p8 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "7:4 ";
+  Value = (Aa64Dfr0El1 >>  4) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Trace unit System registers not implemented.";
+      break;
+    case 0b0001:
+      Description = "Trace unit System registers implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "11:8 ";
+  Value = (Aa64Dfr0El1 >>  8) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Performance Monitors Extension not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_PMUv3 implemented.";
+      break;
+    case 0b0100:
+      Description = "FEAT_PMUv3p1 implemented.";
+      break;
+    case 0b0101:
+      Description = "FEAT_PMUv3p4 implemented.";
+      break;
+    case 0b0110:
+      Description = "FEAT_PMUv3p5 implemented.";
+      break;
+    case 0b0111:
+      Description = "FEAT_PMUv3p7 implemented.";
+      break;
+    case 0b1000:
+      Description = "FEAT_PMUv3p8 implemented.";
+      break;
+    case 0b1111:
+      Description = "IMPLEMENTATION DEFINED form of performance monitors supported.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "15:12";
+  Value = (Aa64Dfr0El1 >> 12) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "reserved";
+      break;
+    default:
+      Description = "Number of breakpoints, minus 1.";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 19:16 reserved
+
+  Bits  = "23:20";
+  Value = (Aa64Dfr0El1 >> 20) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "reserved";
+      break;
+    default:
+      Description = "Number of watchpoints, minus 1.";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 27:24 reserved
+
+  Bits  = "31:28";
+  Value = (Aa64Dfr0El1 >> 28) & 0xf;
+  switch (Value) {
+    default:
+      Description = "Number of breakpoints that are context-aware, minus 1.";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "35:32";
+  Value = (Aa64Dfr0El1 >> 32) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_SPE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_SPE implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_SPEv1p1 implemented.";
+      break;
+    case 0b0011:
+      Description = "FEAT_SPEv1p2 implemented.";
+      break;
+    case 0b0100:
+      Description = "FEAT_SPEv1p3 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "39:36";
+  Value = (Aa64Dfr0El1 >> 36) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_DoubleLock implemented.";
+      break;
+    case 0b1111:
+      Description = "FEAT_DoubleLock not implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "43:40";
+  Value = (Aa64Dfr0El1 >> 40) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TRF not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TRF implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "47:44";
+  Value = (Aa64Dfr0El1 >> 44) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_TRBE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_TRBE implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "51:48";
+  Value = (Aa64Dfr0El1 >> 48) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_MTPMU not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_MTPMU and FEAT_PMUv3 implemented.";
+      break;
+    case 0b1111:
+      Description = "FEAT_MTPMU not implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  Bits  = "55:52";
+  Value = (Aa64Dfr0El1 >> 52) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "FEAT_BRBE not implemented.";
+      break;
+    case 0b0001:
+      Description = "FEAT_BRBE implemented.";
+      break;
+    case 0b0010:
+      Description = "FEAT_BRBEv1p1 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+
+  // 59:56 reserved
+
+  Bits  = "63:60";
+  Value = (Aa64Dfr0El1 >> 60) & 0xf;
+  switch (Value) {
+    case 0b0000:
+      Description = "Setting MDCR_EL2.HPMN to zero has CONSTRAINED UNPREDICTABLE behavior.";
+      break;
+    case 0b0001:
+      Description = "FEAT_HPMN0 implemented.";
+      break;
+    default:
+      Description = "unknown";
+      break;
+  }
+
+  PrintValues (RegName, Bits, Value, Description);
+}
+
+EFI_STATUS
+EFIAPI
+UefiMain  (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  UINT64  Aa64Dfr0El1;
+  UINT64  Aa64Isar0El1;
+  UINT64  Aa64Isar1El1;
+  UINT64  Aa64Isar2El1;
+  UINT64  Aa64Mmfr0El1;
+  UINT64  Aa64Mmfr1El1;
+  UINT64  Aa64Mmfr2El1;
+  UINT64  Aa64Pfr0El1;
+  UINT64  Aa64Pfr1El1;
+
+  Aa64Dfr0El1  = ReadAa64Dfr0El1 ();
+  Aa64Isar0El1 = ReadAa64Isar0El1 ();
+  Aa64Isar1El1 = ReadAa64Isar1El1 ();
+  Aa64Isar2El1 = ReadAa64Isar2El1 ();
+  Aa64Mmfr0El1 = ReadAa64Mmfr0El1 ();
+  Aa64Mmfr1El1 = ReadAa64Mmfr1El1 ();
+  Aa64Mmfr2El1 = ReadAa64Mmfr2El1 ();
+  Aa64Pfr0El1  = ReadAa64Pfr0El1 ();
+  Aa64Pfr1El1  = ReadAa64Pfr1El1 ();
+
+  AsciiPrint ("ID_AA64MMFR0El1 = 0x%016lx\n", Aa64Mmfr0El1);
+  AsciiPrint ("ID_AA64MMFR1El1 = 0x%016lx\n", Aa64Mmfr1El1);
+  AsciiPrint ("ID_AA64MMFR2El1 = 0x%016lx\n", Aa64Mmfr2El1);
+  AsciiPrint ("ID_AA64PFR0El1  = 0x%016lx\n", Aa64Pfr0El1);
+  AsciiPrint ("ID_AA64PFR1El1  = 0x%016lx\n", Aa64Pfr1El1);
+  AsciiPrint ("ID_AA64ISAR0El1 = 0x%016lx\n", Aa64Isar0El1);
+  AsciiPrint ("ID_AA64ISAR1El1 = 0x%016lx\n", Aa64Isar1El1);
+  AsciiPrint ("ID_AA64ISAR2El1 = 0x%016lx\n", Aa64Isar2El1);
+  AsciiPrint ("ID_AA64DFR0El1  = 0x%016lx\n", Aa64Dfr0El1);
+
+  AsciiPrint ("\n");
+  PrintText ("Register", "Bits", "Value", "Feature");
+  PrintSpacer ();
+
+  HandleAa64Mmfr0El1 (Aa64Mmfr0El1);
+  PrintSpacer ();
+  HandleAa64Mmfr1El1 (Aa64Mmfr1El1, Aa64Pfr0El1);
+  PrintSpacer ();
+  HandleAa64Mmfr2El1 (Aa64Mmfr2El1);
+
+  PrintSpacer ();
+  HandleAa64Pfr0El1 (Aa64Pfr0El1, Aa64Pfr1El1);
+  PrintSpacer ();
+  HandleAa64Pfr1El1 (Aa64Pfr1El1);
+
+  PrintSpacer ();
+  HandleAa64Isar0El1 (Aa64Isar0El1);
+  PrintSpacer ();
+  HandleAa64Isar1El1 (Aa64Isar1El1);
+  PrintSpacer ();
+  HandleAa64Isar2El1 (Aa64Isar2El1);
+
+  PrintSpacer ();
+  HandleAa64Dfr0El1 (Aa64Dfr0El1);
+
+  return EFI_SUCCESS;
+}
diff --git a/ArmPkg/Application/ArmCpuInfo/readregs.S b/ArmPkg/Application/ArmCpuInfo/readregs.S
new file mode 100644
index 000000000000..21ba0a912823
--- /dev/null
+++ b/ArmPkg/Application/ArmCpuInfo/readregs.S
@@ -0,0 +1,41 @@
+#include <AsmMacroIoLibV8.h>
+
+ASM_FUNC(ReadAa64Pfr0El1)
+        mrs x0, ID_AA64PFR0_EL1
+        ret
+
+ASM_FUNC(ReadAa64Pfr1El1)
+        mrs x0, ID_AA64PFR1_EL1
+        ret
+
+ASM_FUNC(ReadAa64Dfr0El1)
+        mrs x0, ID_AA64DFR0_EL1
+        ret
+
+ASM_FUNC(ReadAa64Dfr1El1)
+        mrs x0, ID_AA64DFR1_EL1
+        ret
+
+ASM_FUNC(ReadAa64Isar0El1)
+        mrs x0, ID_AA64ISAR0_EL1
+        ret
+
+ASM_FUNC(ReadAa64Isar1El1)
+        mrs x0, ID_AA64ISAR1_EL1
+        ret
+
+ASM_FUNC(ReadAa64Isar2El1)
+        mrs x0, ID_AA64ISAR2_EL1
+        ret
+
+ASM_FUNC(ReadAa64Mmfr0El1)
+        mrs x0, ID_AA64MMFR0_EL1
+        ret
+
+ASM_FUNC(ReadAa64Mmfr1El1)
+        mrs x0, ID_AA64MMFR1_EL1
+        ret
+
+ASM_FUNC(ReadAa64Mmfr2El1)
+        mrs x0, ID_AA64MMFR2_EL1
+        ret
-- 
2.40.0



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#102703): https://edk2.groups.io/g/devel/message/102703
Mute This Topic: https://groups.io/mt/98124918/1787277
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org]
-=-=-=-=-=-=-=-=-=-=-=-