7136d5491e
Due to the way we inherited the formerly fixed PCDs to describe the system memory base and size from ArmPlatformPkg, we ended up with a MemoryInit PEIM that relies on dynamic PCDs to communicate the size of system memory between the constructor of one of its library dependencies and the core module. This is unnecessary, and forces us to incorporate the PCD PEIM as well, for no good reason. So instead, let's use a HOB. Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
/** @file
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*
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* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
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* Copyright (c) 2014, Linaro Limited. All rights reserved.
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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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#include <PiPei.h>
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#include <Library/ArmMmuLib.h>
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#include <Library/ArmVirtMemInfoLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/PcdLib.h>
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#include <Library/CacheMaintenanceLib.h>
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VOID
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BuildMemoryTypeInformationHob (
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VOID
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);
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VOID
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InitMmu (
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VOID
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)
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{
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ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
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VOID *TranslationTableBase;
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UINTN TranslationTableSize;
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RETURN_STATUS Status;
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// Get Virtual Memory Map from the Platform Library
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ArmVirtGetMemoryMap (&MemoryTable);
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// Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
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// DRAM (even at the top of DRAM as it is the first permanent memory allocation)
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Status = ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
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if (EFI_ERROR (Status)) {
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DEBUG ((DEBUG_ERROR, "Error: Failed to enable MMU\n"));
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}
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}
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EFI_STATUS
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EFIAPI
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MemoryPeim (
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IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
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IN UINT64 UefiMemorySize
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)
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{
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EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
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UINT64 SystemMemoryTop;
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UINT64 SystemMemorySize;
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VOID *Hob;
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// Ensure PcdSystemMemorySize has been set
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ASSERT (PcdGet64 (PcdSystemMemorySize) != 0);
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SystemMemorySize = PcdGet64 (PcdSystemMemorySize);
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Hob = GetFirstGuidHob (&gArmVirtSystemMemorySizeGuid);
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if (Hob != NULL) {
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SystemMemorySize = *(UINT64 *)GET_GUID_HOB_DATA (Hob);
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}
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//
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// Now, the permanent memory has been installed, we can call AllocatePages()
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//
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ResourceAttributes = (
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EFI_RESOURCE_ATTRIBUTE_PRESENT |
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EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
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EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
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EFI_RESOURCE_ATTRIBUTE_TESTED
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);
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SystemMemoryTop = PcdGet64 (PcdSystemMemoryBase) + SystemMemorySize;
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if (SystemMemoryTop - 1 > MAX_ALLOC_ADDRESS) {
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BuildResourceDescriptorHob (
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EFI_RESOURCE_SYSTEM_MEMORY,
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ResourceAttributes,
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PcdGet64 (PcdSystemMemoryBase),
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(UINT64)MAX_ALLOC_ADDRESS - PcdGet64 (PcdSystemMemoryBase) + 1
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);
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BuildResourceDescriptorHob (
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EFI_RESOURCE_SYSTEM_MEMORY,
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ResourceAttributes,
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(UINT64)MAX_ALLOC_ADDRESS + 1,
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SystemMemoryTop - MAX_ALLOC_ADDRESS - 1
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);
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} else {
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BuildResourceDescriptorHob (
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EFI_RESOURCE_SYSTEM_MEMORY,
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ResourceAttributes,
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PcdGet64 (PcdSystemMemoryBase),
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SystemMemorySize
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);
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}
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// Build Memory Allocation Hob
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InitMmu ();
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if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
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// Optional feature that helps prevent EFI memory map fragmentation.
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BuildMemoryTypeInformationHob ();
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}
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return EFI_SUCCESS;
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}
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