[edk2-devel] [PATCH 6/7] ArmVirtPkg/ArmVirtQemu: use first 128 MiB as permanent PEI memory
Ard Biesheuvel
ardb at kernel.org
Mon Jul 4 17:52:51 UTC 2022
In order to allow booting with the MMU and caches enabled really early,
we need to ensure that the code that populates the page tables can
access those page tables with the statically defined ID map active.
So let's put the permanent PEI RAM in the first 128 MiB of memory, which
we will cover with this initial ID map (as it is the minimum supported
DRAM size for ArmVirtQemu).
Signed-off-by: Ard Biesheuvel <ardb at kernel.org>
---
ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c | 89 ++++++++++++++++++++
ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf | 66 +++++++++++++++
2 files changed, 155 insertions(+)
diff --git a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c
new file mode 100644
index 000000000000..a48830396e48
--- /dev/null
+++ b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.c
@@ -0,0 +1,89 @@
+/** @file
+
+ Copyright (c) 2011, ARM Limited. All rights reserved.
+ Copyright (c) 2022, Google LLC. All rights reserved.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiPei.h>
+#include <Library/ArmPlatformLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/PcdLib.h>
+#include <Guid/MemoryTypeInformation.h>
+
+EFI_STATUS
+EFIAPI
+MemoryPeim (
+ IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
+ IN UINT64 UefiMemorySize
+ );
+
+VOID
+EFIAPI
+BuildMemoryTypeInformationHob (
+ VOID
+ )
+{
+ EFI_MEMORY_TYPE_INFORMATION Info[10];
+
+ Info[0].Type = EfiACPIReclaimMemory;
+ Info[0].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiACPIReclaimMemory);
+ Info[1].Type = EfiACPIMemoryNVS;
+ Info[1].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiACPIMemoryNVS);
+ Info[2].Type = EfiReservedMemoryType;
+ Info[2].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiReservedMemoryType);
+ Info[3].Type = EfiRuntimeServicesData;
+ Info[3].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiRuntimeServicesData);
+ Info[4].Type = EfiRuntimeServicesCode;
+ Info[4].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiRuntimeServicesCode);
+ Info[5].Type = EfiBootServicesCode;
+ Info[5].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiBootServicesCode);
+ Info[6].Type = EfiBootServicesData;
+ Info[6].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiBootServicesData);
+ Info[7].Type = EfiLoaderCode;
+ Info[7].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiLoaderCode);
+ Info[8].Type = EfiLoaderData;
+ Info[8].NumberOfPages = PcdGet32 (PcdMemoryTypeEfiLoaderData);
+
+ // Terminator for the list
+ Info[9].Type = EfiMaxMemoryType;
+ Info[9].NumberOfPages = 0;
+
+ BuildGuidDataHob (&gEfiMemoryTypeInformationGuid, &Info, sizeof (Info));
+}
+
+EFI_STATUS
+EFIAPI
+InitializeMemory (
+ IN EFI_PEI_FILE_HANDLE FileHandle,
+ IN CONST EFI_PEI_SERVICES **PeiServices
+ )
+{
+ UINTN UefiMemoryBase;
+ EFI_STATUS Status;
+
+ ASSERT (PcdGet64 (PcdSystemMemorySize) >= SIZE_128MB);
+ ASSERT (PcdGet64 (PcdSystemMemoryBase) < (UINT64)MAX_ALLOC_ADDRESS);
+
+ //
+ // Put the permanent PEI memory in the first 128 MiB of DRAM so that
+ // it is covered by the statically configured ID map.
+ //
+ UefiMemoryBase = (UINTN)PcdGet64 (PcdSystemMemoryBase) + SIZE_128MB
+ - FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
+
+ Status = PeiServicesInstallPeiMemory (UefiMemoryBase,
+ FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
+ ASSERT_EFI_ERROR (Status);
+
+ Status = MemoryPeim (UefiMemoryBase,
+ FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
diff --git a/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
new file mode 100644
index 000000000000..4c56b15bd342
--- /dev/null
+++ b/ArmVirtPkg/MemoryInitPei/MemoryInitPeim.inf
@@ -0,0 +1,66 @@
+#/** @file
+#
+# Copyright (c) 2011-2014, ARM Ltd. All rights reserved.<BR>
+# Copyright (c) 2022, Google LLC. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#**/
+
+[Defines]
+ INF_VERSION = 1.27
+ BASE_NAME = MemoryInit
+ FILE_GUID = 0fbffd44-f98f-4e1c-9922-e9b21f13c3f8
+ MODULE_TYPE = PEIM
+ VERSION_STRING = 1.0
+
+ ENTRY_POINT = InitializeMemory
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 EBC ARM
+#
+
+[Sources]
+ MemoryInitPeim.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ ArmPkg/ArmPkg.dec
+ ArmPlatformPkg/ArmPlatformPkg.dec
+
+[LibraryClasses]
+ PeimEntryPoint
+ DebugLib
+ HobLib
+ ArmLib
+ ArmPlatformLib
+ MemoryInitPeiLib
+
+[Guids]
+ gEfiMemoryTypeInformationGuid
+
+[FeaturePcd]
+ gEmbeddedTokenSpaceGuid.PcdPrePiProduceMemoryTypeInformationHob
+
+[FixedPcd]
+ gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize
+
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIMemoryNVS
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiReservedMemoryType
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesCode
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesData
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderCode
+ gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderData
+
+[Pcd]
+ gArmTokenSpaceGuid.PcdSystemMemoryBase
+ gArmTokenSpaceGuid.PcdSystemMemorySize
+
+[Depex]
+ TRUE
--
2.35.1
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