mirror of https://github.com/acidanthera/audk.git
108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
/** @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 <Library/ArmPlatformGlobalVariableLib.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 4
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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_ATTRIBUTES CacheAttributes;
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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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if (FeaturePcdGet (PcdCacheEnable) == TRUE) {
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CacheAttributes = DDR_ATTRIBUTES_CACHED;
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} else {
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CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
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}
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// System DRAM
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VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
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VirtualMemoryTable[0].VirtualBase = VirtualMemoryTable[0].PhysicalBase;
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VirtualMemoryTable[0].Length = PcdGet64 (PcdSystemMemorySize);
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VirtualMemoryTable[0].Attributes = CacheAttributes;
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DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
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"\tPhysicalBase: 0x%lX\n"
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"\tVirtualBase: 0x%lX\n"
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"\tLength: 0x%lX\n",
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__FUNCTION__,
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VirtualMemoryTable[0].PhysicalBase,
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VirtualMemoryTable[0].VirtualBase,
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VirtualMemoryTable[0].Length));
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// Peripheral space before DRAM
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VirtualMemoryTable[1].PhysicalBase = 0x0;
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VirtualMemoryTable[1].VirtualBase = 0x0;
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VirtualMemoryTable[1].Length = VirtualMemoryTable[0].PhysicalBase;
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VirtualMemoryTable[1].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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// Peripheral space after DRAM
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VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
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VirtualMemoryTable[2].VirtualBase = VirtualMemoryTable[2].PhysicalBase;
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VirtualMemoryTable[2].Length = ArmGetPhysAddrTop () - VirtualMemoryTable[2].PhysicalBase;
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VirtualMemoryTable[2].Attributes = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
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// End of Table
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ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
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*VirtualMemoryMap = VirtualMemoryTable;
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}
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