/** @file
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*
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* Copyright (c) 2011-2015, ARM Limited. All rights reserved.
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* Copyright (c) 2017, ARM 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/ArmPlatformLib.h>
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#include <Library/DebugLib.h>
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#include <Library/HobLib.h>
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#include <Library/PcdLib.h>
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VOID
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BuildMemoryTypeInformationHob (
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VOID
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);
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STATIC
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VOID
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InitMmu (
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IN ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable
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)
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{
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VOID *TranslationTableBase;
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UINTN TranslationTableSize;
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RETURN_STATUS Status;
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Status = ArmConfigureMmu (MemoryTable,
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&TranslationTableBase,
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&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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/*++
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Routine Description:
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Remove the reserved region from a System Memory Hob that covers it.
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Arguments:
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FileHandle - Handle of the file being invoked.
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PeiServices - Describes the list of possible PEI Services.
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--*/
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STATIC
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VOID
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ReserveMemoryRegion (
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IN EFI_PHYSICAL_ADDRESS ReservedRegionBase,
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IN UINT32 ReservedRegionSize
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)
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{
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EFI_RESOURCE_ATTRIBUTE_TYPE ResourceAttributes;
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EFI_PHYSICAL_ADDRESS ReservedRegionTop;
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EFI_PHYSICAL_ADDRESS ResourceTop;
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EFI_PEI_HOB_POINTERS NextHob;
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UINT64 ResourceLength;
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ReservedRegionTop = ReservedRegionBase + ReservedRegionSize;
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//
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// Search for System Memory Hob that covers the reserved region,
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// and punch a hole in it
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//
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for (NextHob.Raw = GetHobList ();
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NextHob.Raw != NULL;
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NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR,
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NextHob.Raw)) {
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if ((NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) &&
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(ReservedRegionBase >= NextHob.ResourceDescriptor->PhysicalStart) &&
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(ReservedRegionTop <= NextHob.ResourceDescriptor->PhysicalStart +
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NextHob.ResourceDescriptor->ResourceLength))
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{
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ResourceAttributes = NextHob.ResourceDescriptor->ResourceAttribute;
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ResourceLength = NextHob.ResourceDescriptor->ResourceLength;
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ResourceTop = NextHob.ResourceDescriptor->PhysicalStart + ResourceLength;
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if (ReservedRegionBase == NextHob.ResourceDescriptor->PhysicalStart) {
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//
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// This region starts right at the start of the reserved region, so we
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// can simply move its start pointer and reduce its length by the same
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// value
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//
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NextHob.ResourceDescriptor->PhysicalStart += ReservedRegionSize;
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NextHob.ResourceDescriptor->ResourceLength -= ReservedRegionSize;
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} else if ((NextHob.ResourceDescriptor->PhysicalStart +
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NextHob.ResourceDescriptor->ResourceLength) ==
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ReservedRegionTop) {
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//
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// This region ends right at the end of the reserved region, so we
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// can simply reduce its length by the size of the region.
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//
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NextHob.ResourceDescriptor->ResourceLength -= ReservedRegionSize;
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} else {
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//
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// This region covers the reserved region. So split it into two regions,
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// each one touching the reserved region at either end, but not covering
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// it.
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//
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NextHob.ResourceDescriptor->ResourceLength =
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ReservedRegionBase - NextHob.ResourceDescriptor->PhysicalStart;
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// Create the System Memory HOB for the remaining region (top of the FD)
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BuildResourceDescriptorHob (EFI_RESOURCE_SYSTEM_MEMORY,
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ResourceAttributes,
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ReservedRegionTop,
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ResourceTop - ReservedRegionTop);
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}
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//
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// Reserve the memory space.
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//
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BuildResourceDescriptorHob (EFI_RESOURCE_MEMORY_RESERVED,
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0,
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ReservedRegionBase,
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ReservedRegionSize);
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break;
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}
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NextHob.Raw = GET_NEXT_HOB (NextHob);
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}
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}
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/*++
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Routine Description:
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Arguments:
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FileHandle - Handle of the file being invoked.
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PeiServices - Describes the list of possible PEI Services.
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Returns:
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Status - EFI_SUCCESS if the boot mode could be set
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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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ARM_MEMORY_REGION_DESCRIPTOR *MemoryTable;
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// Get Virtual Memory Map from the Platform Library
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ArmPlatformGetVirtualMemoryMap (&MemoryTable);
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// Reserve memory region for ARM-TF
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ReserveMemoryRegion (
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(EFI_PHYSICAL_ADDRESS)FixedPcdGet64 (PcdArmTFRegionBase),
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FixedPcdGet32 (PcdArmTFRegionSize)
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);
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// Reserve additional memory region (e.g. for PEI stack)
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ReserveMemoryRegion (
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(EFI_PHYSICAL_ADDRESS)FixedPcdGet64 (PcdAuxiliaryReservedRegionBase),
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FixedPcdGet32 (PcdAuxiliaryReservedRegionSize)
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);
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// Reserve memory region for OP-TEE
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ReserveMemoryRegion (
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(EFI_PHYSICAL_ADDRESS)FixedPcdGet64 (PcdOpTeeRegionBase),
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FixedPcdGet32 (PcdOpTeeRegionSize)
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);
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// Build Memory Allocation Hob
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InitMmu (MemoryTable);
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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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