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/** @file
*
* Copyright (c) 2014, 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.
*
**/
#include <Library/ArmPlatformLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
// Number of Virtual Memory Map Descriptors
#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 2
// DDR attributes
#define DDR_ATTRIBUTES_CACHED ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
#define DDR_ATTRIBUTES_UNCACHED ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
EFI_PHYSICAL_ADDRESS
ArmGetPhysAddrTop (
VOID
);
/**
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_DESCRIPTOR *VirtualMemoryTable;
ASSERT (VirtualMemoryMap != NULL);
VirtualMemoryTable = AllocatePages (
EFI_SIZE_TO_PAGES (
sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
* MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
)
);
if (VirtualMemoryTable == NULL) {
DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
return;
}
//
// Map the entire physical memory space as cached. The only device
// we care about is the GIC, which will be stage 2 mapped as a device
// by the hypervisor, which will override the cached mapping we install
// here.
//
VirtualMemoryTable[0].PhysicalBase = 0x0;
VirtualMemoryTable[0].VirtualBase = 0x0;
VirtualMemoryTable[0].Length = ArmGetPhysAddrTop ();
VirtualMemoryTable[0].Attributes = DDR_ATTRIBUTES_CACHED;
// End of Table
ZeroMem (&VirtualMemoryTable[1], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
*VirtualMemoryMap = VirtualMemoryTable;
}
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