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 // mach-virt's core peripherals such as the UART, the GIC and the RTC are
  26 // all mapped in the 'miscellaneous device I/O' region, which we just map
  27 // in its entirety rather than device by device. Note that it does not
  28 // cover any of the NOR flash banks or PCI resource windows.
  29 //
  30 #define MACH_VIRT_PERIPH_BASE       0x08000000
  31 #define MACH_VIRT_PERIPH_SIZE       SIZE_128MB
  32
  33 /**
  34   Return the Virtual Memory Map of your platform
  35
  36   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
  37   on your platform.
  38
  39   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
  40                                     describing a Physical-to-Virtual Memory
  41                                     mapping. This array must be ended by a
  42                                     zero-filled entry. The allocated memory
  43                                     will not be freed.
  44
  45 **/
  46 VOID
  47 ArmVirtGetMemoryMap (
  48   OUT ARM_MEMORY_REGION_DESCRIPTOR   **VirtualMemoryMap
  49   )
  50 {
  51   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  52
  53   ASSERT (VirtualMemoryMap != NULL);
  54
  55   VirtualMemoryTable = AllocatePool (sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
  56                                      MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
  57
  58   if (VirtualMemoryTable == NULL) {
  59     DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
  60     return;
  61   }
  62
  63   // System DRAM
  64   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
  65   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
  66   VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
  67   VirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  68
  69   DEBUG ((DEBUG_INFO, "%a: Dumping System DRAM Memory Map:\n"
  70       "\tPhysicalBase: 0x%lX\n"
  71       "\tVirtualBase: 0x%lX\n"
  72       "\tLength: 0x%lX\n",
  73       __FUNCTION__,
  74       VirtualMemoryTable[0].PhysicalBase,
  75       VirtualMemoryTable[0].VirtualBase,
  76       VirtualMemoryTable[0].Length));
  77
  78   // Memory mapped peripherals (UART, RTC, GIC, virtio-mmio, etc)
  79   VirtualMemoryTable[1].PhysicalBase = MACH_VIRT_PERIPH_BASE;
  80   VirtualMemoryTable[1].VirtualBase  = MACH_VIRT_PERIPH_BASE;
  81   VirtualMemoryTable[1].Length       = MACH_VIRT_PERIPH_SIZE;
  82   VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  83
  84   // Map the FV region as normal executable memory
  85   VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
  86   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
  87   VirtualMemoryTable[2].Length       = FixedPcdGet32 (PcdFvSize);
  88   VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  89
  90   // End of Table
  91   ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
  92
  93   *VirtualMemoryMap = VirtualMemoryTable;
  94 }