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 EFI_PHYSICAL_ADDRESS
  25 ArmGetPhysAddrTop (
  26   VOID
  27   );
  28
  29 /**
  30   Return the Virtual Memory Map of your platform
  31
  32   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
  33   on your platform.
  34
  35   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
  36                                     describing a Physical-to-Virtual Memory
  37                                     mapping. This array must be ended by a
  38                                     zero-filled entry. The allocated memory
  39                                     will not be freed.
  40
  41 **/
  42 VOID
  43 ArmVirtGetMemoryMap (
  44   OUT ARM_MEMORY_REGION_DESCRIPTOR   **VirtualMemoryMap
  45   )
  46 {
  47   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  48   UINT64                        TopOfMemory;
  49
  50   ASSERT (VirtualMemoryMap != NULL);
  51
  52   VirtualMemoryTable = AllocatePool (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
  53                                      MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
  54
  55   if (VirtualMemoryTable == NULL) {
  56     DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
  57     return;
  58   }
  59
  60   // System DRAM
  61   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
  62   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
  63   VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
  64   VirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  65
  66   DEBUG ((DEBUG_INFO, "%a: Dumping System DRAM Memory Map:\n"
  67       "\tPhysicalBase: 0x%lX\n"
  68       "\tVirtualBase: 0x%lX\n"
  69       "\tLength: 0x%lX\n",
  70       __FUNCTION__,
  71       VirtualMemoryTable[0].PhysicalBase,
  72       VirtualMemoryTable[0].VirtualBase,
  73       VirtualMemoryTable[0].Length));
  74
  75   // Peripheral space before DRAM
  76   VirtualMemoryTable[1].PhysicalBase = 0x0;
  77   VirtualMemoryTable[1].VirtualBase  = 0x0;
  78   VirtualMemoryTable[1].Length       = VirtualMemoryTable[0].PhysicalBase;
  79   VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  80
  81   // Peripheral space after DRAM
  82   TopOfMemory = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize),
  83                      ArmGetPhysAddrTop ());
  84   VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
  85   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
  86   VirtualMemoryTable[2].Length       = TopOfMemory -
  87                                        VirtualMemoryTable[2].PhysicalBase;
  88   VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  89
  90   // Remap the FD region as normal executable memory
  91   VirtualMemoryTable[3].PhysicalBase = PcdGet64 (PcdFdBaseAddress);
  92   VirtualMemoryTable[3].VirtualBase  = VirtualMemoryTable[3].PhysicalBase;
  93   VirtualMemoryTable[3].Length       = FixedPcdGet32 (PcdFdSize);
  94   VirtualMemoryTable[3].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  95
  96   // End of Table
  97   ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
  98
  99   *VirtualMemoryMap = VirtualMemoryTable;
 100 }