Support RISC-V cache related functions.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Abner Chang <abner.chang@hpe.com>
---
.../BaseSynchronizationLib.inf | 6 +
.../RiscV64/Synchronization.c | 189 +++++++++++++++++++++
.../RiscV64/SynchronizationAsm.s | 84 +++++++++
3 files changed, 279 insertions(+)
create mode 100644 MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c
create mode 100644 MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s
diff --git a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
index 446bc19..d49001b 100755
--- a/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
+++ b/MdePkg/Library/BaseSynchronizationLib/BaseSynchronizationLib.inf
@@ -3,6 +3,7 @@
#
# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -78,6 +79,11 @@
AArch64/Synchronization.S | GCC
AArch64/Synchronization.asm | MSFT
+[Sources.RISCV64]
+ Synchronization.c
+ RiscV64/Synchronization.c | GCC
+ RiscV64/SynchronizationAsm.s
+
[Packages]
MdePkg/MdePkg.dec
diff --git a/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c
new file mode 100644
index 0000000..e85e2f5
--- /dev/null
+++ b/MdePkg/Library/BaseSynchronizationLib/RiscV64/Synchronization.c
@@ -0,0 +1,189 @@
+/** @file
+ Implementation of synchronization functions on RISC-V
+
+ Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+#include <Library/DebugLib.h>
+
+UINT32
+SyncCompareExchange32 (
+ IN volatile UINT32 *Value,
+ IN UINT32 CompareValue,
+ IN UINT32 ExchangeValue
+);
+
+UINT64
+SyncCompareExchange64 (
+ IN volatile UINT64 *Value,
+ IN UINT64 CompareValue,
+ IN UINT64 ExchangeValue
+);
+
+UINT32
+SyncSyncIncrement32 (
+ IN volatile UINT32 *Value
+ );
+
+UINT32
+SyncSyncDecrement32 (
+ IN volatile UINT32 *Value
+ );
+
+/**
+ Performs an atomic compare exchange operation on a 16-bit
+ unsigned integer.
+
+ Performs an atomic compare exchange operation on the 16-bit
+ unsigned integer specified by Value. If Value is equal to
+ CompareValue, then Value is set to ExchangeValue and
+ CompareValue is returned. If Value is not equal to
+ CompareValue, then Value is returned. The compare exchange
+ operation must be performed using MP safe mechanisms.
+
+ @param Value A pointer to the 16-bit value for the
+ compare exchange operation.
+ @param CompareValue 16-bit value used in compare operation.
+ @param ExchangeValue 16-bit value used in exchange operation.
+
+ @return The original *Value before exchange.
+
+**/
+UINT16
+EFIAPI
+InternalSyncCompareExchange16 (
+ IN volatile UINT16 *Value,
+ IN UINT16 CompareValue,
+ IN UINT16 ExchangeValue
+ )
+{
+ DEBUG((DEBUG_ERROR, "%a:RISC-V does not support 16-bit AMO operation\n", __FUNCTION__));
+ ASSERT (FALSE);
+ return 0;
+}
+
+/**
+ Performs an atomic compare exchange operation on a 32-bit
+ unsigned integer.
+
+ Performs an atomic compare exchange operation on the 32-bit
+ unsigned integer specified by Value. If Value is equal to
+ CompareValue, then Value is set to ExchangeValue and
+ CompareValue is returned. If Value is not equal to
+ CompareValue, then Value is returned. The compare exchange
+ operation must be performed using MP safe mechanisms.
+
+ @param Value A pointer to the 32-bit value for the
+ compare exchange operation.
+ @param CompareValue 32-bit value used in compare operation.
+ @param ExchangeValue 32-bit value used in exchange operation.
+
+ @return The original *Value before exchange.
+
+**/
+UINT32
+EFIAPI
+InternalSyncCompareExchange32 (
+ IN volatile UINT32 *Value,
+ IN UINT32 CompareValue,
+ IN UINT32 ExchangeValue
+ )
+{
+
+ if (((UINTN)Value % sizeof (UINT32)) != 0) {
+ DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__));
+ ASSERT (FALSE);
+ }
+ return SyncCompareExchange32(Value, CompareValue, ExchangeValue);
+}
+
+/**
+ Performs an atomic compare exchange operation on a 64-bit unsigned integer.
+
+ Performs an atomic compare exchange operation on the 64-bit unsigned integer specified
+ by Value. If Value is equal to CompareValue, then Value is set to ExchangeValue and
+ CompareValue is returned. If Value is not equal to CompareValue, then Value is returned.
+ The compare exchange operation must be performed using MP safe mechanisms.
+
+ @param Value A pointer to the 64-bit value for the compare exchange
+ operation.
+ @param CompareValue 64-bit value used in compare operation.
+ @param ExchangeValue 64-bit value used in exchange operation.
+
+ @return The original *Value before exchange.
+
+**/
+UINT64
+EFIAPI
+InternalSyncCompareExchange64 (
+ IN volatile UINT64 *Value,
+ IN UINT64 CompareValue,
+ IN UINT64 ExchangeValue
+ )
+{
+ if (((UINTN)Value % sizeof (UINT64)) != 0) {
+ DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__));
+ ASSERT (FALSE);
+ }
+ return SyncCompareExchange64 (Value, CompareValue, ExchangeValue);
+}
+
+/**
+ Performs an atomic increment of an 32-bit unsigned integer.
+
+ Performs an atomic increment of the 32-bit unsigned integer specified by
+ Value and returns the incremented value. The increment operation must be
+ performed using MP safe mechanisms. The state of the return value is not
+ guaranteed to be MP safe.
+
+ @param Value A pointer to the 32-bit value to increment.
+
+ @return The incremented value.
+
+**/
+UINT32
+EFIAPI
+InternalSyncIncrement (
+ IN volatile UINT32 *Value
+ )
+{
+ if (((UINTN)Value % sizeof (UINT32)) != 0) {
+ DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__));
+ ASSERT (FALSE);
+ }
+ return SyncSyncIncrement32 (Value);
+}
+
+/**
+ Performs an atomic decrement of an 32-bit unsigned integer.
+
+ Performs an atomic decrement of the 32-bit unsigned integer specified by
+ Value and returns the decrement value. The decrement operation must be
+ performed using MP safe mechanisms. The state of the return value is not
+ guaranteed to be MP safe.
+
+ @param Value A pointer to the 32-bit value to decrement.
+
+ @return The decrement value.
+
+**/
+UINT32
+EFIAPI
+InternalSyncDecrement (
+ IN volatile UINT32 *Value
+ )
+{
+ if (((UINTN)Value % sizeof (UINT32)) != 0) {
+ DEBUG((DEBUG_ERROR, "%a:Value pointer must aligned at natural address.\n", __FUNCTION__));
+ ASSERT (FALSE);
+ }
+ return SyncSyncDecrement32 (Value);
+}
diff --git a/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s b/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s
new file mode 100644
index 0000000..3e838b0
--- /dev/null
+++ b/MdePkg/Library/BaseSynchronizationLib/RiscV64/SynchronizationAsm.s
@@ -0,0 +1,84 @@
+//------------------------------------------------------------------------------
+//
+// RISC-V synchronization functions.
+//
+// Copyright (c) 2016, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>
+//
+// This program and the accompanying materials
+// are licensed and made available under the terms and conditions of the BSD License
+// which accompanies this distribution. The full text of the license may be found at
+// http://opensource.org/licenses/bsd-license.php.
+//
+// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+//
+//------------------------------------------------------------------------------
+#include <Base.h>
+
+.data
+
+.text
+.align 3
+
+.global ASM_PFX(SyncCompareExchange32)
+.global ASM_PFX(SyncCompareExchange64)
+.global ASM_PFX(SyncSyncIncrement32)
+.global ASM_PFX(SyncSyncDecrement32)
+
+//
+// ompare and xchange a 32-bit value.
+//
+// @param a0 : Pointer to 32-bit value.
+// @param a1 : Compare value.
+// @param a2 : Exchange value.
+//
+ASM_PFX (SyncCompareExchange32):
+ lr.w a3, (a0) // Load the value from a0 and make
+ // the reservation of address.
+ bne a3, a1, exit
+ sc.w a3, a2, (a0) // Write the value back to the address.
+ mv a3, a1
+exit:
+ mv a0, a3
+ ret
+
+.global ASM_PFX(SyncCompareExchange64)
+
+//
+// Compare and xchange a 64-bit value.
+//
+// @param a0 : Pointer to 64-bit value.
+// @param a1 : Compare value.
+// @param a2 : Exchange value.
+//
+ASM_PFX (SyncCompareExchange64):
+ lr.d a3, (a0) // Load the value from a0 and make
+ // the reservation of address.
+ bne a3, a1, exit
+ sc.d a3, a2, (a0) // Write the value back to the address.
+ mv a3, a1
+exit2:
+ mv a0, a3
+ ret
+
+//
+// Performs an atomic increment of an 32-bit unsigned integer.
+//
+// @param a0 : Pointer to 32-bit value.
+//
+ASM_PFX (SyncSyncIncrement32):
+ li a1, 1
+ amoadd.w a2, a1, (a0)
+ mv a0, a2
+ ret
+
+//
+// Performs an atomic decrement of an 32-bit unsigned integer.
+//
+// @param a0 : Pointer to 32-bit value.
+//
+ASM_PFX (SyncSyncDecrement32):
+ li a1, -1
+ amoadd.w a2, a1, (a0)
+ mv a0, a2
+ ret
--
2.7.4
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