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58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/** @file
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Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Library/ArmLib.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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STATIC ARM_MEMORY_REGION_DESCRIPTOR mVirtualMemoryTable[2];
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/**
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Return the Virtual Memory Map of your platform
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This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
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on your platform.
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@param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR
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describing a Physical-to-Virtual Memory
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mapping. This array must be ended by a
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zero-filled entry. The allocated memory
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will not be freed.
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**/
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VOID
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EFIAPI
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ArmVirtGetMemoryMap (
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OUT ARM_MEMORY_REGION_DESCRIPTOR **VirtualMemoryMap
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)
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{
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EFI_PHYSICAL_ADDRESS TopOfAddressSpace;
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ASSERT (VirtualMemoryMap != NULL);
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TopOfAddressSpace = LShiftU64 (1ULL, ArmGetPhysicalAddressBits ());
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//
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// Map the entire physical memory space as cached. The only device
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// we care about is the GIC, which will be stage 2 mapped as a device
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// by the hypervisor, overriding the cached mapping we install here.
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//
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mVirtualMemoryTable[0].PhysicalBase = 0x0;
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mVirtualMemoryTable[0].VirtualBase = 0x0;
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mVirtualMemoryTable[0].Length = TopOfAddressSpace;
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mVirtualMemoryTable[0].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
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mVirtualMemoryTable[1].PhysicalBase = 0x0;
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mVirtualMemoryTable[1].VirtualBase = 0x0;
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mVirtualMemoryTable[1].Length = 0x0;
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mVirtualMemoryTable[1].Attributes = 0x0;
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*VirtualMemoryMap = mVirtualMemoryTable;
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}
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