mirror of https://github.com/acidanthera/audk.git
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
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/** @file
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*
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* Copyright (c) 2014, Linaro Limited. All rights reserved.
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*
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* This program and the accompanying materials
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* are licensed and made available under the terms and conditions of the BSD License
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* which accompanies this distribution. The full text of the license may be found at
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* http://opensource.org/licenses/bsd-license.php
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*
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* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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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/BaseMemoryLib.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 <ArmPlatform.h>
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// Number of Virtual Memory Map Descriptors
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#define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS 2
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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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EFI_PHYSICAL_ADDRESS
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ArmGetPhysAddrTop (
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VOID
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);
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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
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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_DESCRIPTOR *VirtualMemoryTable;
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ASSERT (VirtualMemoryMap != NULL);
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VirtualMemoryTable = AllocatePages (
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EFI_SIZE_TO_PAGES (
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sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
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* MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
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)
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);
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if (VirtualMemoryTable == NULL) {
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DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
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return;
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}
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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, which will override the cached mapping we install
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// here.
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//
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VirtualMemoryTable[0].PhysicalBase = 0x0;
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VirtualMemoryTable[0].VirtualBase = 0x0;
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VirtualMemoryTable[0].Length = ArmGetPhysAddrTop ();
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VirtualMemoryTable[0].Attributes = DDR_ATTRIBUTES_CACHED;
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// End of Table
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ZeroMem (&VirtualMemoryTable[1], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
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*VirtualMemoryMap = VirtualMemoryTable;
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}
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