/** @file
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*
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* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
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* Copyright (c) 2015, Hisilicon Limited. All rights reserved.
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* Copyright (c) 2015, Linaro 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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* Based on the files under ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/
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*
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**/
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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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#include <Library/IoLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/OemSetVirtualMapDesc.h>
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#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 32
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// DDR attributes
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#define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
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#define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
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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 on your platform.
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@param[out] VirtualMemoryMap Array of ARM_MEMORY_REGION_DESCRIPTOR describing a Physical-to-
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Virtual Memory mapping. This array must be ended by a zero-filled
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entry
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**/
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VOID
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ArmPlatformGetVirtualMemoryMap (
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IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
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)
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{
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ARM_MEMORY_REGION_ATTRIBUTES CacheAttributes;
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UINTN Index;
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ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
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EFI_PEI_HOB_POINTERS NextHob;
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ASSERT (VirtualMemoryMap != NULL);
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VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages(EFI_SIZE_TO_PAGES (sizeof(ARM_MEMORY_REGION_DESCRIPTOR) * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
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if (VirtualMemoryTable == NULL) {
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return;
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}
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CacheAttributes = DDR_ATTRIBUTES_CACHED;
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Index = OemSetVirtualMapDesc(VirtualMemoryTable, CacheAttributes);
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// Search for System Memory Hob that contains the EFI resource system memory
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NextHob.Raw = GetHobList ();
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while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL)
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{
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if (NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY)
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{
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if (NextHob.ResourceDescriptor->PhysicalStart > BASE_4GB)
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{
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VirtualMemoryTable[++Index].PhysicalBase = NextHob.ResourceDescriptor->PhysicalStart;
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VirtualMemoryTable[Index].VirtualBase = NextHob.ResourceDescriptor->PhysicalStart;
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VirtualMemoryTable[Index].Length =NextHob.ResourceDescriptor->ResourceLength;
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VirtualMemoryTable[Index].Attributes = CacheAttributes;
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}
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}
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NextHob.Raw = GET_NEXT_HOB (NextHob);
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}
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// End of Table
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VirtualMemoryTable[++Index].PhysicalBase = 0;
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VirtualMemoryTable[Index].VirtualBase = 0;
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VirtualMemoryTable[Index].Length = 0;
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VirtualMemoryTable[Index].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
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ASSERT((Index + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
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DEBUG((EFI_D_INFO, "[%a]:[%dL] discriptor count=%d\n", __FUNCTION__, __LINE__, Index+1));
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*VirtualMemoryMap = VirtualMemoryTable;
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}
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