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@kernel.org>
60 lines
1.7 KiB
INI
60 lines
1.7 KiB
INI
## @file
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# Implementation of MemoryInitPeim that uses the first 128 MiB at the base of
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# DRAM as permanent PEI memory
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#
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# Copyright (c) 2011-2014, ARM Ltd. All rights reserved.<BR>
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# Copyright (c) 2022, Google LLC. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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[Defines]
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INF_VERSION = 1.27
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BASE_NAME = MemoryInit
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FILE_GUID = 0fbffd44-f98f-4e1c-9922-e9b21f13c3f8
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MODULE_TYPE = PEIM
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VERSION_STRING = 1.0
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ENTRY_POINT = InitializeMemory
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[Sources]
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MemoryInitPeim.c
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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EmbeddedPkg/EmbeddedPkg.dec
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ArmPkg/ArmPkg.dec
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ArmPlatformPkg/ArmPlatformPkg.dec
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[LibraryClasses]
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PeimEntryPoint
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DebugLib
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HobLib
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ArmLib
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ArmPlatformLib
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MemoryInitPeiLib
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[Guids]
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gEfiMemoryTypeInformationGuid
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[FeaturePcd]
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gEmbeddedTokenSpaceGuid.PcdPrePiProduceMemoryTypeInformationHob
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[FixedPcd]
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gArmTokenSpaceGuid.PcdSystemMemoryBase
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gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIMemoryNVS
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiReservedMemoryType
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesCode
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesData
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderCode
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gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderData
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[Depex]
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TRUE
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