ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c

   1 /** @file
   2
   3   Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
   4
   5   This program and the accompanying materials are licensed and made available
   6   under the terms and conditions of the BSD License which accompanies this
   7   distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include <Base.h>
  16 #include <Library/ArmLib.h>
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/DebugLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20
  21 // Number of Virtual Memory Map Descriptors
  22 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          5
  23
  24 /**
  25   Return the Virtual Memory Map of your platform
  26
  27   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
  28   on your platform.
  29
  30   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
  31                                     describing a Physical-to-Virtual Memory
  32                                     mapping. This array must be ended by a
  33                                     zero-filled entry. The allocated memory
  34                                     will not be freed.
  35
  36 **/
  37 VOID
  38 ArmVirtGetMemoryMap (
  39   OUT ARM_MEMORY_REGION_DESCRIPTOR   **VirtualMemoryMap
  40   )
  41 {
  42   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  43
  44   ASSERT (VirtualMemoryMap != NULL);
  45
  46   VirtualMemoryTable = AllocatePool (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
  47                                      MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
  48
  49   if (VirtualMemoryTable == NULL) {
  50     DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
  51     return;
  52   }
  53
  54   // System DRAM
  55   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
  56   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
  57   VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
  58   VirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  59
  60   DEBUG ((DEBUG_INFO, "%a: Dumping System DRAM Memory Map:\n"
  61       "\tPhysicalBase: 0x%lX\n"
  62       "\tVirtualBase: 0x%lX\n"
  63       "\tLength: 0x%lX\n",
  64       __FUNCTION__,
  65       VirtualMemoryTable[0].PhysicalBase,
  66       VirtualMemoryTable[0].VirtualBase,
  67       VirtualMemoryTable[0].Length));
  68
  69   // Peripheral space before DRAM
  70   VirtualMemoryTable[1].PhysicalBase = 0x0;
  71   VirtualMemoryTable[1].VirtualBase  = 0x0;
  72   VirtualMemoryTable[1].Length       = VirtualMemoryTable[0].PhysicalBase;
  73   VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  74
  75   // Remap the FD region as normal executable memory
  76   VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFdBaseAddress);
  77   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
  78   VirtualMemoryTable[2].Length       = FixedPcdGet32 (PcdFdSize);
  79   VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  80
  81   // End of Table
  82   ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
  83
  84   *VirtualMemoryMap = VirtualMemoryTable;
  85 }