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/** @file
*
* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
* Copyright (c) 2014, Linaro Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#include <PiPei.h>
#include <Library/ArmMmuLib.h>
#include <Library/ArmVirtMemInfoLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/CacheMaintenanceLib.h>
VOID
BuildMemoryTypeInformationHob (
VOID
);
VOID
InitMmu (
VOID
)
{
ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
VOID *TranslationTableBase;
UINTN TranslationTableSize;
RETURN_STATUS Status;
// Get Virtual Memory Map from the Platform Library
ArmVirtGetMemoryMap (&MemoryTable);
// Note: Because we called PeiServicesInstallPeiMemory() before to call InitMmu() the MMU Page Table resides in
// DRAM (even at the top of DRAM as it is the first permanent memory allocation)
Status = ArmConfigureMmu (MemoryTable, &TranslationTableBase, &TranslationTableSize);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Error: Failed to enable MMU\n"));
}
}
EFI_STATUS
EFIAPI
MemoryPeim (
IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
IN UINT64 UefiMemorySize
)
{
EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
UINT64 SystemMemoryTop;
// Ensure PcdSystemMemorySize has been set
ASSERT (PcdGet64 (PcdSystemMemorySize) != 0);
//
// Now, the permanent memory has been installed, we can call AllocatePages()
//
ResourceAttributes = (
EFI_RESOURCE_ATTRIBUTE_PRESENT |
EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
EFI_RESOURCE_ATTRIBUTE_TESTED
);
SystemMemoryTop = PcdGet64 (PcdSystemMemoryBase) +
PcdGet64 (PcdSystemMemorySize);
if (SystemMemoryTop - 1 > MAX_ALLOC_ADDRESS) {
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
ResourceAttributes,
PcdGet64 (PcdSystemMemoryBase),
(UINT64)MAX_ALLOC_ADDRESS - PcdGet64 (PcdSystemMemoryBase) + 1
);
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
ResourceAttributes,
(UINT64)MAX_ALLOC_ADDRESS + 1,
SystemMemoryTop - MAX_ALLOC_ADDRESS - 1
);
} else {
BuildResourceDescriptorHob (
EFI_RESOURCE_SYSTEM_MEMORY,
ResourceAttributes,
PcdGet64 (PcdSystemMemoryBase),
PcdGet64 (PcdSystemMemorySize)
);
}
//
// When running under virtualization, the PI/UEFI memory region may be
// clean but not invalidated in system caches or in lower level caches
// on other CPUs. So invalidate the region by virtual address, to ensure
// that the contents we put there with the caches and MMU off will still
// be visible after turning them on.
//
InvalidateDataCacheRange ((VOID *)(UINTN)UefiMemoryBase, UefiMemorySize);
// Build Memory Allocation Hob
InitMmu ();
if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
// Optional feature that helps prevent EFI memory map fragmentation.
BuildMemoryTypeInformationHob ();
}
return EFI_SUCCESS;
}
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