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/** @file
*
* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
* Copyright (c) 2015, Hisilicon Limited. All rights reserved.
* Copyright (c) 2015, Linaro Limited. All rights reserved.
*
* This program and the accompanying materials
* are licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
* Based on the files under ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/
*
**/
#include <Library/ArmPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/OemSetVirtualMapDesc.h>
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 32
// DDR attributes
#define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
#define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
/**
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
**/
VOID
ArmPlatformGetVirtualMemoryMap (
IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
)
{
ARM_MEMORY_REGION_ATTRIBUTES CacheAttributes;
UINTN Index;
ARM_MEMORY_REGION_DESCRIPTOR *VirtualMemoryTable;
EFI_PEI_HOB_POINTERS NextHob;
ASSERT (VirtualMemoryMap != NULL);
VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages(EFI_SIZE_TO_PAGES (sizeof(ARM_MEMORY_REGION_DESCRIPTOR) * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
if (VirtualMemoryTable == NULL) {
return;
}
if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
CacheAttributes = DDR_ATTRIBUTES_CACHED;
} else {
CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
}
Index = OemSetVirtualMapDesc(VirtualMemoryTable, CacheAttributes);
// Search for System Memory Hob that contains the EFI resource system memory
NextHob.Raw = GetHobList ();
while ((NextHob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, NextHob.Raw)) != NULL)
{
if (NextHob.ResourceDescriptor->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY)
{
if (NextHob.ResourceDescriptor->PhysicalStart > BASE_4GB)
{
VirtualMemoryTable[++Index].PhysicalBase = NextHob.ResourceDescriptor->PhysicalStart;
VirtualMemoryTable[Index].VirtualBase = NextHob.ResourceDescriptor->PhysicalStart;
VirtualMemoryTable[Index].Length =NextHob.ResourceDescriptor->ResourceLength;
VirtualMemoryTable[Index].Attributes = CacheAttributes;
}
}
NextHob.Raw = GET_NEXT_HOB (NextHob);
}
// End of Table
VirtualMemoryTable[++Index].PhysicalBase = 0;
VirtualMemoryTable[Index].VirtualBase = 0;
VirtualMemoryTable[Index].Length = 0;
VirtualMemoryTable[Index].Attributes = (ARM_MEMORY_REGION_ATTRIBUTES)0;
ASSERT((Index + 1) <= MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
DEBUG((EFI_D_INFO, "[%a]:[%dL] discriptor count=%d\n", __FUNCTION__, __LINE__, Index+1));
*VirtualMemoryMap = VirtualMemoryTable;
}
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