ArmVirtPkg/Library/QemuVirtMemInfoLib/QemuVirtMemInfoLib.c

   1 /** @file
   2
   3   Copyright (c) 2014-2017, Linaro Limited. All rights reserved.
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include <Base.h>
  10 #include <Library/ArmLib.h>
  11 #include <Library/BaseMemoryLib.h>
  12 #include <Library/DebugLib.h>
  13 #include <Library/MemoryAllocationLib.h>
  14
  15 // Number of Virtual Memory Map Descriptors
  16 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS  5
  17
  18 //
  19 // mach-virt's core peripherals such as the UART, the GIC and the RTC are
  20 // all mapped in the 'miscellaneous device I/O' region, which we just map
  21 // in its entirety rather than device by device. Note that it does not
  22 // cover any of the NOR flash banks or PCI resource windows.
  23 //
  24 #define MACH_VIRT_PERIPH_BASE  0x08000000
  25 #define MACH_VIRT_PERIPH_SIZE  SIZE_128MB
  26
  27 /**
  28   Return the Virtual Memory Map of your platform
  29
  30   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
  31   on your platform.
  32
  33   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
  34                                     describing a Physical-to-Virtual Memory
  35                                     mapping. This array must be ended by a
  36                                     zero-filled entry. The allocated memory
  37                                     will not be freed.
  38
  39 **/
  40 VOID
  41 ArmVirtGetMemoryMap (
  42   OUT ARM_MEMORY_REGION_DESCRIPTOR  **VirtualMemoryMap
  43   )
  44 {
  45   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  46
  47   ASSERT (VirtualMemoryMap != NULL);
  48
  49   VirtualMemoryTable = AllocatePool (
  50                          sizeof (ARM_MEMORY_REGION_DESCRIPTOR) *
  51                          MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
  52                          );
  53
  54   if (VirtualMemoryTable == NULL) {
  55     DEBUG ((DEBUG_ERROR, "%a: Error: Failed AllocatePool()\n", __FUNCTION__));
  56     return;
  57   }
  58
  59   // System DRAM
  60   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
  61   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
  62   VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
  63   VirtualMemoryTable[0].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  64
  65   DEBUG ((
  66     DEBUG_INFO,
  67     "%a: Dumping System DRAM Memory Map:\n"
  68     "\tPhysicalBase: 0x%lX\n"
  69     "\tVirtualBase: 0x%lX\n"
  70     "\tLength: 0x%lX\n",
  71     __FUNCTION__,
  72     VirtualMemoryTable[0].PhysicalBase,
  73     VirtualMemoryTable[0].VirtualBase,
  74     VirtualMemoryTable[0].Length
  75     ));
  76
  77   // Memory mapped peripherals (UART, RTC, GIC, virtio-mmio, etc)
  78   VirtualMemoryTable[1].PhysicalBase = MACH_VIRT_PERIPH_BASE;
  79   VirtualMemoryTable[1].VirtualBase  = MACH_VIRT_PERIPH_BASE;
  80   VirtualMemoryTable[1].Length       = MACH_VIRT_PERIPH_SIZE;
  81   VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  82
  83   // Map the FV region as normal executable memory
  84   VirtualMemoryTable[2].PhysicalBase = PcdGet64 (PcdFvBaseAddress);
  85   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
  86   VirtualMemoryTable[2].Length       = FixedPcdGet32 (PcdFvSize);
  87   VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK;
  88
  89   // End of Table
  90   ZeroMem (&VirtualMemoryTable[3], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
  91
  92   *VirtualMemoryMap = VirtualMemoryTable;
  93 }