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/** @file
Kvmtool virtual memory map library.
Copyright (c) 2018 - 2020, ARM Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Base.h>
#include <Library/ArmLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
// Number of Virtual Memory Map Descriptors
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 5
/**
Return the Virtual Memory Map of your platform
This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
on your platform.
@param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
describing a Physical-to-Virtual Memory
mapping. This array must be ended by a
zero-filled entry. The allocated memory
will not be freed.
**/
VOID
ArmVirtGetMemoryMap (
OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
)
{
ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
UINTN Idx;
EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
ASSERT (VirtualMemoryMap != NULL);
TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR *)
AllocatePages (
EFI_SIZE_TO_PAGES (
sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
)
);
if (VirtualMemoryTable == NULL) {
DEBUG ((
DEBUG_ERROR,
"%a: Error: Failed to Allocate Pages\n",
__FUNCTION__
));
return;
}
Idx = 0;
// System DRAM
VirtualMemoryTable[Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemorySize);
VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
// Peripheral space before DRAM
VirtualMemoryTable[++Idx].PhysicalBase = 0x0;
VirtualMemoryTable[Idx].VirtualBase = 0x0;
VirtualMemoryTable[Idx].Length = PcdGet64 (PcdSystemMemoryBase);
VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
// Peripheral space after DRAM
VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdSystemMemoryBase) +
PcdGet64 (PcdSystemMemorySize);
VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
VirtualMemoryTable[Idx].Length = TopOfAddressSpace -
VirtualMemoryTable[Idx].PhysicalBase;
VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
// Map the FV region as normal executable memory
VirtualMemoryTable[++Idx].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
VirtualMemoryTable[Idx].VirtualBase = VirtualMemoryTable[Idx].PhysicalBase;
VirtualMemoryTable[Idx].Length = FixedPcdGet32 (PcdFvSize);
VirtualMemoryTable[Idx].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
// End of Table
VirtualMemoryTable[++Idx].PhysicalBase = 0;
VirtualMemoryTable[Idx].VirtualBase = 0;
VirtualMemoryTable[Idx].Length = 0;
VirtualMemoryTable[Idx].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
ASSERT ((Idx + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
*VirtualMemoryMap = VirtualMemoryTable;
}
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