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- /** @file
- Copyright (c) 2011-2015, ARM Limited. All rights reserved.
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <PiPei.h>
- #include <Library/ArmMmuLib.h>
- #include <Library/ArmPlatformLib.h>
- #include <Library/DebugLib.h>
- #include <Library/HobLib.h>
- #include <Library/MemoryAllocationLib.h>
- #include <Library/PcdLib.h>
- VOID
- BuildMemoryTypeInformationHob (
- VOID
- );
- STATIC
- VOID
- InitMmu (
- IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable
- )
- {
- VOID *TranslationTableBase;
- UINTN TranslationTableSize;
- RETURN_STATUS Status;
- // 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"));
- }
- }
- /*++
- Routine Description:
- Arguments:
- FileHandle - Handle of the file being invoked.
- PeiServices - Describes the list of possible PEI Services.
- Returns:
- Status - EFI_SUCCESS if the boot mode could be set
- --*/
- EFI_STATUS
- EFIAPI
- MemoryPeim (
- IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
- IN UINT64 UefiMemorySize
- )
- {
- ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
- EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
- UINT64 ResourceLength;
- EFI_PEI_HOB_POINTERS NextHob;
- EFI_PHYSICAL_ADDRESS FdTop;
- EFI_PHYSICAL_ADDRESS SystemMemoryTop;
- EFI_PHYSICAL_ADDRESS ResourceTop;
- BOOLEAN Found;
- // Get Virtual Memory Map from the Platform Library
- ArmPlatformGetVirtualMemoryMap (&MemoryTable);
- // 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_COMBINEABLE |
- EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
- EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
- EFI_RESOURCE_ATTRIBUTE_TESTED
- );
- //
- // Check if the resource for the main system memory has been declared
- //
- Found = FALSE;
- NextHob.Raw = GetHobList ();
- while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
- if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
- (PcdGet64 (PcdSystemMemoryBase) >= NextHob.ResourceDescriptor->PhysicalStart) &&
- (NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength <= PcdGet64 (PcdSystemMemoryBase) + PcdGet64 (PcdSystemMemorySize)))
- {
- Found = TRUE;
- break;
- }
- NextHob.Raw = GET_NEXT_HOB (NextHob);
- }
- if (!Found) {
- // Reserved the memory space occupied by the firmware volume
- BuildResourceDescriptorHob (
- EFI_RESOURCE_SYSTEM_MEMORY,
- ResourceAttributes,
- PcdGet64 (PcdSystemMemoryBase),
- PcdGet64 (PcdSystemMemorySize)
- );
- }
- //
- // Reserved the memory space occupied by the firmware volume
- //
- SystemMemoryTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemoryBase) + (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdSystemMemorySize);
- FdTop = (EFI_PHYSICAL_ADDRESS)PcdGet64 (PcdFdBaseAddress) + (EFI_PHYSICAL_ADDRESS)PcdGet32 (PcdFdSize);
- // EDK2 does not have the concept of boot firmware copied into DRAM. To avoid the DXE
- // core to overwrite this area we must create a memory allocation HOB for the region,
- // but this only works if we split off the underlying resource descriptor as well.
- if ((PcdGet64 (PcdFdBaseAddress) >= PcdGet64 (PcdSystemMemoryBase)) && (FdTop <= SystemMemoryTop)) {
- Found = FALSE;
- // Search for System Memory Hob that contains the firmware
- NextHob.Raw = GetHobList ();
- while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL) {
- if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
- (PcdGet64 (PcdFdBaseAddress) >= NextHob.ResourceDescriptor->PhysicalStart) &&
- (FdTop <= NextHob.ResourceDescriptor->PhysicalStart + NextHob.ResourceDescriptor->ResourceLength))
- {
- ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;
- ResourceLength = NextHob.ResourceDescriptor->ResourceLength;
- ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;
- if (PcdGet64 (PcdFdBaseAddress) == NextHob.ResourceDescriptor->PhysicalStart) {
- if (SystemMemoryTop != FdTop) {
- // Create the System Memory HOB for the firmware
- BuildResourceDescriptorHob (
- EFI_RESOURCE_SYSTEM_MEMORY,
- ResourceAttributes,
- PcdGet64 (PcdFdBaseAddress),
- PcdGet32 (PcdFdSize)
- );
- // Top of the FD is system memory available for UEFI
- NextHob.ResourceDescriptor->PhysicalStart += PcdGet32 (PcdFdSize);
- NextHob.ResourceDescriptor->ResourceLength -= PcdGet32 (PcdFdSize);
- }
- } else {
- // Create the System Memory HOB for the firmware
- BuildResourceDescriptorHob (
- EFI_RESOURCE_SYSTEM_MEMORY,
- ResourceAttributes,
- PcdGet64 (PcdFdBaseAddress),
- PcdGet32 (PcdFdSize)
- );
- // Update the HOB
- NextHob.ResourceDescriptor->ResourceLength = PcdGet64 (PcdFdBaseAddress) - NextHob.ResourceDescriptor->PhysicalStart;
- // If there is some memory available on the top of the FD then create a HOB
- if (FdTop < NextHob.ResourceDescriptor->PhysicalStart + ResourceLength) {
- // Create the System Memory HOB for the remaining region (top of the FD)
- BuildResourceDescriptorHob (
- EFI_RESOURCE_SYSTEM_MEMORY,
- ResourceAttributes,
- FdTop,
- ResourceTop - FdTop
- );
- }
- }
- // Mark the memory covering the Firmware Device as boot services data
- BuildMemoryAllocationHob (
- PcdGet64 (PcdFdBaseAddress),
- PcdGet32 (PcdFdSize),
- EfiBootServicesData
- );
- Found = TRUE;
- break;
- }
- NextHob.Raw = GET_NEXT_HOB (NextHob);
- }
- ASSERT (Found);
- }
- // Build Memory Allocation Hob
- InitMmu (MemoryTable);
- if (FeaturePcdGet (PcdPrePiProduceMemoryTypeInformationHob)) {
- // Optional feature that helps prevent EFI memory map fragmentation.
- BuildMemoryTypeInformationHob ();
- }
- return EFI_SUCCESS;
- }
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