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[edk2-devel] [PATCH v2 2/7] Silicon/ARM/NeoverseN1Soc: Define new PCDs and configure memory map

Khasim Mohammed posted 7 patches 4 years, 4 months ago
There is a newer version of this series
[edk2-devel] [PATCH v2 2/7] Silicon/ARM/NeoverseN1Soc: Define new PCDs and configure memory map
Posted by Khasim Mohammed 4 years, 4 months ago 
This patch introduces new PCDs required to enable
chip to chip interface and corresponding memory map is updated.

Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>
---
 .../Library/PlatformLib/PlatformLib.inf       | 28 +++++--
 .../Library/PlatformLib/PlatformLibMem.c      | 84 ++++++++++++++++---
 Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec   | 35 +++++++-
 3 files changed, 125 insertions(+), 22 deletions(-)

diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
index 166c9e0444..8e2154aadf 100644
--- a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
@@ -1,6 +1,7 @@
 ## @file
+#  Platform Library for N1Sdp.
 #
-#  Copyright (c) 2018-2020, ARM Limited. All rights reserved.
+#  Copyright (c) 2018-2021, ARM Limited. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -29,13 +30,17 @@
   AArch64/Helper.S | GCC
 
 [FixedPcd]
-  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
-
-  gArmTokenSpaceGuid.PcdSystemMemoryBase
-  gArmTokenSpaceGuid.PcdSystemMemorySize
-  gArmTokenSpaceGuid.PcdArmPrimaryCore
-  gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
-
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMax
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMin
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixExpressBaseAddress
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Base
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Size
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Base
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Size
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseAddress
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseSize
+  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base
+  gArmNeoverseN1SocTokenSpaceGuid.PcdExtMemorySpace
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMax
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMin
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32Base
@@ -45,7 +50,12 @@
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieRootPortConfigBaseAddress
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieRootPortConfigBaseSize
 
-  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base
+  gArmTokenSpaceGuid.PcdArmPrimaryCore
+  gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
+  gArmTokenSpaceGuid.PcdSystemMemoryBase
+  gArmTokenSpaceGuid.PcdSystemMemorySize
+
+  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
 
 [Guids]
   gEfiHobListGuid          ## CONSUMES  ## SystemTable
diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
index f9b3d03753..1c4a445c5e 100644
--- a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
+++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
@@ -1,9 +1,9 @@
 /** @file
-*
-*  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
-*
-*  SPDX-License-Identifier: BSD-2-Clause-Patent
-*
+
+  Copyright (c) 2018 - 2021, ARM Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
 **/
 
 #include <Library/ArmPlatformLib.h>
@@ -13,7 +13,7 @@
 #include <NeoverseN1Soc.h>
 
 // The total number of descriptors, including the final "end-of-table" descriptor.
-#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 13
+#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 19
 
 /**
   Returns the Virtual Memory Map of the platform.
@@ -21,21 +21,23 @@
   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
   on your platform.
 
-  @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR describing
-                               a Physical-to-Virtual Memory mapping. This array
-                               must be ended by a zero-filled entry.
+  @param[in]   VirtualMemoryMap  Array of ARM_MEMORY_REGION_DESCRIPTOR describing
+                                 a Physical-to-Virtual Memory mapping. This array
+                                 must be ended by a zero-filled entry.
 **/
 VOID
 ArmPlatformGetVirtualMemoryMap (
   IN     ARM_MEMORY_REGION_DESCRIPTOR  **VirtualMemoryMap
   )
 {
-  UINTN                         Index = 0;
+  UINTN                         Index;
   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
   EFI_RESOURCE_ATTRIBUTE_TYPE   ResourceAttributes;
   NEOVERSEN1SOC_PLAT_INFO       *PlatInfo;
   UINT64                        DramBlock2Size;
+  UINT64                        RemoteDdrSize;
 
+  Index = 0;
   PlatInfo = (NEOVERSEN1SOC_PLAT_INFO *)NEOVERSEN1SOC_PLAT_INFO_STRUCT_BASE;
   DramBlock2Size = ((UINT64)(PlatInfo->LocalDdrSize -
                              NEOVERSEN1SOC_DRAM_BLOCK1_SIZE / SIZE_1GB) *
@@ -55,6 +57,24 @@ ArmPlatformGetVirtualMemoryMap (
     FixedPcdGet64 (PcdDramBlock2Base),
     DramBlock2Size);
 
+  if (PlatInfo->MultichipMode == 1) {
+    RemoteDdrSize = ((PlatInfo->RemoteDdrSize - 2) * SIZE_1GB);
+
+    BuildResourceDescriptorHob (
+      EFI_RESOURCE_SYSTEM_MEMORY,
+      ResourceAttributes,
+      FixedPcdGet64 (PcdExtMemorySpace) + FixedPcdGet64 (PcdSystemMemoryBase),
+      PcdGet64 (PcdSystemMemorySize)
+      );
+
+    BuildResourceDescriptorHob (
+      EFI_RESOURCE_SYSTEM_MEMORY,
+      ResourceAttributes,
+      FixedPcdGet64 (PcdExtMemorySpace) + FixedPcdGet64 (PcdDramBlock2Base),
+      RemoteDdrSize
+      );
+  }
+
   ASSERT (VirtualMemoryMap != NULL);
   Index = 0;
 
@@ -114,6 +134,32 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[Index].Length          = PcdGet64 (PcdPcieMmio64Size);
   VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
+  // CCIX RC Configuration Space
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixRootPortConfigBaseAddress);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixRootPortConfigBaseAddress);
+  VirtualMemoryTable[Index].Length          = PcdGet32 (PcdCcixRootPortConfigBaseSize);
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // CCIX ECAM Configuration Space
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixExpressBaseAddress);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixExpressBaseAddress);
+  VirtualMemoryTable[Index].Length          = (FixedPcdGet32 (PcdCcixBusMax) -
+                                               FixedPcdGet32 (PcdCcixBusMin) + 1) *
+                                               SIZE_1MB;
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+  // CCIX MMIO32 Memory Space
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixMmio32Base);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixMmio32Base);
+  VirtualMemoryTable[Index].Length          = PcdGet32 (PcdCcixMmio32Size);
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
+ // CCIX MMIO64 Memory Space
+  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdCcixMmio64Base);
+  VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdCcixMmio64Base);
+  VirtualMemoryTable[Index].Length          = PcdGet64 (PcdCcixMmio64Size);
+  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
+
   // SubSystem Pheripherals - UART0
   VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_UART0_BASE;
   VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_UART0_BASE;
@@ -138,6 +184,24 @@ ArmPlatformGetVirtualMemoryMap (
   VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_EXP_PERIPH_BASE0_SZ;
   VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
 
+  if (PlatInfo->MultichipMode == 1) {
+    //Remote DDR (2GB)
+    VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdExtMemorySpace) +
+                                                PcdGet64 (PcdSystemMemoryBase);
+    VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdExtMemorySpace) +
+                                                PcdGet64 (PcdSystemMemoryBase);
+    VirtualMemoryTable[Index].Length          = PcdGet64 (PcdSystemMemorySize);
+    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH;
+
+    //Remote DDR
+    VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdExtMemorySpace) +
+                                                PcdGet64 (PcdDramBlock2Base);
+    VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdExtMemorySpace) +
+                                                PcdGet64 (PcdDramBlock2Base);
+    VirtualMemoryTable[Index].Length          = RemoteDdrSize;
+    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH;
+  }
+
   // End of Table
   VirtualMemoryTable[++Index].PhysicalBase  = 0;
   VirtualMemoryTable[Index].VirtualBase     = 0;
diff --git a/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec b/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
index 54b793a937..eea2d58402 100644
--- a/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
+++ b/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
@@ -1,5 +1,7 @@
+## @file
+#  Describes the entire platform configuration.
 #
-#  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
+#  Copyright (c) 2018 - 2021, ARM Limited. All rights reserved.<BR>
 #
 #  SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -33,8 +35,8 @@
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMax|17|UINT32|0x00000005
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMin|0|UINT32|0x00000006
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoBase|0x0|UINT32|0x00000007
-  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoMaxBase|0x00FFFFFF|UINT32|0x00000008
-  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoSize|0x01000000|UINT32|0x00000009
+  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoMaxBase|0x001FFFF|UINT32|0x00000008
+  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoSize|0x020000|UINT32|0x00000009
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoTranslation|0x75200000|UINT32|0x0000000A
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32Base|0x71200000|UINT32|0x0000000B
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32MaxBase|0x751FFFFF|UINT32|0x0000000C
@@ -44,3 +46,30 @@
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64MaxBase|0x28FFFFFFFF|UINT64|0x00000010
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64Size|0x2000000000|UINT64|0x00000011
   gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64Translation|0x0|UINT64|0x00000012
+
+  # CCIX
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusCount|18|UINT32|0x00000016
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMax|17|UINT32|0x00000017
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMin|0|UINT32|0x00000018
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixExpressBaseAddress|0x68000000|UINT32|0x00000019
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoBase|0x0|UINT32|0x0000001A
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoMaxBase|0x01FFFF|UINT32|0x0000001B
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoSize|0x020000|UINT32|0x0000001C
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoTranslation|0x6D200000|UINT32|0x00000001D
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Base|0x69200000|UINT32|0x0000001E
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32MaxBase|0x6D1FFFFF|UINT32|0x00000001F
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Size|0x04000000|UINT32|0x00000020
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Translation|0x0|UINT32|0x00000021
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Base|0x2900000000|UINT64|0x00000022
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64MaxBase|0x48FFFFFFFF|UINT64|0x00000023
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Size|0x2000000000|UINT64|0x00000024
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Translation|0x0|UINT64|0x00000025
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseAddress|0x62000000|UINT32|0x00000026
+  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseSize|0x00001000|UINT32|0x00000027
+
+  gArmNeoverseN1SocTokenSpaceGuid.PcdExtMemorySpace|0x40000000000|UINT64|0x00000029
+
+  # Remote Chip PCIe
+  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieIoTranslation|0x40075200000|UINT64|0x0000004A
+  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieMmio32Translation|0x40000000000|UINT64|0x0000004B
+  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieMmio64Translation|0x40000000000|UINT64|0x0000004C
-- 
2.17.1



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Re: [edk2-devel] [PATCH v2 2/7] Silicon/ARM/NeoverseN1Soc: Define new PCDs and configure memory map
Posted by PierreGondois 4 years, 4 months ago 
Hi Khasim and Chandni,
The patch looks good to me,
Reviewed-by: Pierre Gondois <Pierre.Gondois@arm.com>

Regards,

Pierre

On 10/10/21 19:29, Khasim Mohammed via groups.io wrote:
> This patch introduces new PCDs required to enable
> chip to chip interface and corresponding memory map is updated.
>
> Signed-off-by: Chandni Cherukuri <chandni.cherukuri@arm.com>
> Signed-off-by: Khasim Syed Mohammed <khasim.mohammed@arm.com>
> ---
>  .../Library/PlatformLib/PlatformLib.inf       | 28 +++++--
>  .../Library/PlatformLib/PlatformLibMem.c      | 84 ++++++++++++++++---
>  Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec   | 35 +++++++-
>  3 files changed, 125 insertions(+), 22 deletions(-)
>
> diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
> index 166c9e0444..8e2154aadf 100644
> --- a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
> +++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLib.inf
> @@ -1,6 +1,7 @@
>  ## @file
> +#  Platform Library for N1Sdp.
>  #
> -#  Copyright (c) 2018-2020, ARM Limited. All rights reserved.
> +#  Copyright (c) 2018-2021, ARM Limited. All rights reserved.<BR>
>  #
>  #  SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -29,13 +30,17 @@
>    AArch64/Helper.S | GCC
>  
>  [FixedPcd]
> -  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
> -
> -  gArmTokenSpaceGuid.PcdSystemMemoryBase
> -  gArmTokenSpaceGuid.PcdSystemMemorySize
> -  gArmTokenSpaceGuid.PcdArmPrimaryCore
> -  gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
> -
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMax
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMin
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixExpressBaseAddress
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Base
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Size
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Base
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Size
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseAddress
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseSize
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdExtMemorySpace
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMax
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMin
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32Base
> @@ -45,7 +50,12 @@
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieRootPortConfigBaseAddress
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieRootPortConfigBaseSize
>  
> -  gArmNeoverseN1SocTokenSpaceGuid.PcdDramBlock2Base
> +  gArmTokenSpaceGuid.PcdArmPrimaryCore
> +  gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
> +  gArmTokenSpaceGuid.PcdSystemMemoryBase
> +  gArmTokenSpaceGuid.PcdSystemMemorySize
> +
> +  gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
>  
>  [Guids]
>    gEfiHobListGuid          ## CONSUMES  ## SystemTable
> diff --git a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
> index f9b3d03753..1c4a445c5e 100644
> --- a/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
> +++ b/Silicon/ARM/NeoverseN1Soc/Library/PlatformLib/PlatformLibMem.c
> @@ -1,9 +1,9 @@
>  /** @file
> -*
> -*  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
> -*
> -*  SPDX-License-Identifier: BSD-2-Clause-Patent
> -*
> +
> +  Copyright (c) 2018 - 2021, ARM Limited. All rights reserved.<BR>
> +
> +  SPDX-License-Identifier: BSD-2-Clause-Patent
> +
>  **/
>  
>  #include <Library/ArmPlatformLib.h>
> @@ -13,7 +13,7 @@
>  #include <NeoverseN1Soc.h>
>  
>  // The total number of descriptors, including the final "end-of-table" descriptor.
> -#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 13
> +#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 19
>  
>  /**
>    Returns the Virtual Memory Map of the platform.
> @@ -21,21 +21,23 @@
>    This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
>    on your platform.
>  
> -  @param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR describing
> -                               a Physical-to-Virtual Memory mapping. This array
> -                               must be ended by a zero-filled entry.
> +  @param[in]   VirtualMemoryMap  Array of ARM_MEMORY_REGION_DESCRIPTOR describing
> +                                 a Physical-to-Virtual Memory mapping. This array
> +                                 must be ended by a zero-filled entry.
>  **/
>  VOID
>  ArmPlatformGetVirtualMemoryMap (
>    IN     ARM_MEMORY_REGION_DESCRIPTOR  **VirtualMemoryMap
>    )
>  {
> -  UINTN                         Index = 0;
> +  UINTN                         Index;
>    ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
>    EFI_RESOURCE_ATTRIBUTE_TYPE   ResourceAttributes;
>    NEOVERSEN1SOC_PLAT_INFO       *PlatInfo;
>    UINT64                        DramBlock2Size;
> +  UINT64                        RemoteDdrSize;
>  
> +  Index = 0;
>    PlatInfo = (NEOVERSEN1SOC_PLAT_INFO *)NEOVERSEN1SOC_PLAT_INFO_STRUCT_BASE;
>    DramBlock2Size = ((UINT64)(PlatInfo->LocalDdrSize -
>                               NEOVERSEN1SOC_DRAM_BLOCK1_SIZE / SIZE_1GB) *
> @@ -55,6 +57,24 @@ ArmPlatformGetVirtualMemoryMap (
>      FixedPcdGet64 (PcdDramBlock2Base),
>      DramBlock2Size);
>  
> +  if (PlatInfo->MultichipMode == 1) {
> +    RemoteDdrSize = ((PlatInfo->RemoteDdrSize - 2) * SIZE_1GB);
> +
> +    BuildResourceDescriptorHob (
> +      EFI_RESOURCE_SYSTEM_MEMORY,
> +      ResourceAttributes,
> +      FixedPcdGet64 (PcdExtMemorySpace) + FixedPcdGet64 (PcdSystemMemoryBase),
> +      PcdGet64 (PcdSystemMemorySize)
> +      );
> +
> +    BuildResourceDescriptorHob (
> +      EFI_RESOURCE_SYSTEM_MEMORY,
> +      ResourceAttributes,
> +      FixedPcdGet64 (PcdExtMemorySpace) + FixedPcdGet64 (PcdDramBlock2Base),
> +      RemoteDdrSize
> +      );
> +  }
> +
>    ASSERT (VirtualMemoryMap != NULL);
>    Index = 0;
>  
> @@ -114,6 +134,32 @@ ArmPlatformGetVirtualMemoryMap (
>    VirtualMemoryTable[Index].Length          = PcdGet64 (PcdPcieMmio64Size);
>    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
>  
> +  // CCIX RC Configuration Space
> +  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixRootPortConfigBaseAddress);
> +  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixRootPortConfigBaseAddress);
> +  VirtualMemoryTable[Index].Length          = PcdGet32 (PcdCcixRootPortConfigBaseSize);
> +  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> +
> +  // CCIX ECAM Configuration Space
> +  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixExpressBaseAddress);
> +  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixExpressBaseAddress);
> +  VirtualMemoryTable[Index].Length          = (FixedPcdGet32 (PcdCcixBusMax) -
> +                                               FixedPcdGet32 (PcdCcixBusMin) + 1) *
> +                                               SIZE_1MB;
> +  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> +
> +  // CCIX MMIO32 Memory Space
> +  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet32 (PcdCcixMmio32Base);
> +  VirtualMemoryTable[Index].VirtualBase     = PcdGet32 (PcdCcixMmio32Base);
> +  VirtualMemoryTable[Index].Length          = PcdGet32 (PcdCcixMmio32Size);
> +  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> +
> + // CCIX MMIO64 Memory Space
> +  VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdCcixMmio64Base);
> +  VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdCcixMmio64Base);
> +  VirtualMemoryTable[Index].Length          = PcdGet64 (PcdCcixMmio64Size);
> +  VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
> +
>    // SubSystem Pheripherals - UART0
>    VirtualMemoryTable[++Index].PhysicalBase  = NEOVERSEN1SOC_UART0_BASE;
>    VirtualMemoryTable[Index].VirtualBase     = NEOVERSEN1SOC_UART0_BASE;
> @@ -138,6 +184,24 @@ ArmPlatformGetVirtualMemoryMap (
>    VirtualMemoryTable[Index].Length          = NEOVERSEN1SOC_EXP_PERIPH_BASE0_SZ;
>    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
>  
> +  if (PlatInfo->MultichipMode == 1) {
> +    //Remote DDR (2GB)
> +    VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdExtMemorySpace) +
> +                                                PcdGet64 (PcdSystemMemoryBase);
> +    VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdExtMemorySpace) +
> +                                                PcdGet64 (PcdSystemMemoryBase);
> +    VirtualMemoryTable[Index].Length          = PcdGet64 (PcdSystemMemorySize);
> +    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH;
> +
> +    //Remote DDR
> +    VirtualMemoryTable[++Index].PhysicalBase  = PcdGet64 (PcdExtMemorySpace) +
> +                                                PcdGet64 (PcdDramBlock2Base);
> +    VirtualMemoryTable[Index].VirtualBase     = PcdGet64 (PcdExtMemorySpace) +
> +                                                PcdGet64 (PcdDramBlock2Base);
> +    VirtualMemoryTable[Index].Length          = RemoteDdrSize;
> +    VirtualMemoryTable[Index].Attributes      = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_THROUGH;
> +  }
> +
>    // End of Table
>    VirtualMemoryTable[++Index].PhysicalBase  = 0;
>    VirtualMemoryTable[Index].VirtualBase     = 0;
> diff --git a/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec b/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
> index 54b793a937..eea2d58402 100644
> --- a/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
> +++ b/Silicon/ARM/NeoverseN1Soc/NeoverseN1Soc.dec
> @@ -1,5 +1,7 @@
> +## @file
> +#  Describes the entire platform configuration.
>  #
> -#  Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
> +#  Copyright (c) 2018 - 2021, ARM Limited. All rights reserved.<BR>
>  #
>  #  SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -33,8 +35,8 @@
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMax|17|UINT32|0x00000005
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieBusMin|0|UINT32|0x00000006
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoBase|0x0|UINT32|0x00000007
> -  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoMaxBase|0x00FFFFFF|UINT32|0x00000008
> -  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoSize|0x01000000|UINT32|0x00000009
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoMaxBase|0x001FFFF|UINT32|0x00000008
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoSize|0x020000|UINT32|0x00000009
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieIoTranslation|0x75200000|UINT32|0x0000000A
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32Base|0x71200000|UINT32|0x0000000B
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio32MaxBase|0x751FFFFF|UINT32|0x0000000C
> @@ -44,3 +46,30 @@
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64MaxBase|0x28FFFFFFFF|UINT64|0x00000010
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64Size|0x2000000000|UINT64|0x00000011
>    gArmNeoverseN1SocTokenSpaceGuid.PcdPcieMmio64Translation|0x0|UINT64|0x00000012
> +
> +  # CCIX
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusCount|18|UINT32|0x00000016
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMax|17|UINT32|0x00000017
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixBusMin|0|UINT32|0x00000018
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixExpressBaseAddress|0x68000000|UINT32|0x00000019
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoBase|0x0|UINT32|0x0000001A
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoMaxBase|0x01FFFF|UINT32|0x0000001B
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoSize|0x020000|UINT32|0x0000001C
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixIoTranslation|0x6D200000|UINT32|0x00000001D
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Base|0x69200000|UINT32|0x0000001E
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32MaxBase|0x6D1FFFFF|UINT32|0x00000001F
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Size|0x04000000|UINT32|0x00000020
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio32Translation|0x0|UINT32|0x00000021
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Base|0x2900000000|UINT64|0x00000022
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64MaxBase|0x48FFFFFFFF|UINT64|0x00000023
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Size|0x2000000000|UINT64|0x00000024
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixMmio64Translation|0x0|UINT64|0x00000025
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseAddress|0x62000000|UINT32|0x00000026
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdCcixRootPortConfigBaseSize|0x00001000|UINT32|0x00000027
> +
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdExtMemorySpace|0x40000000000|UINT64|0x00000029
> +
> +  # Remote Chip PCIe
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieIoTranslation|0x40075200000|UINT64|0x0000004A
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieMmio32Translation|0x40000000000|UINT64|0x0000004B
> +  gArmNeoverseN1SocTokenSpaceGuid.PcdRemotePcieMmio64Translation|0x40000000000|UINT64|0x0000004C


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