BeagleBoardPkg/Library/BeagleBoardLib/BeagleBoardMem.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this 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 <Library/ArmPlatformLib.h>
  16 #include <Library/DebugLib.h>
  17 #include <Library/PcdLib.h>
  18 #include <Library/MemoryAllocationLib.h>
  19 #include <Library/IoLib.h>
  20
  21 #include <BeagleBoard.h>
  22
  23 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          4
  24
  25 /**
  26   Return the Virtual Memory Map of your platform
  27
  28   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU on your platform.
  29
  30   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR describing a Physical-to-
  31                                     Virtual Memory mapping. This array must be ended by a zero-filled
  32                                     entry
  33
  34 **/
  35 VOID
  36 ArmPlatformGetVirtualMemoryMap (
  37   IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
  38   )
  39 {
  40   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
  41   UINTN                         Index = 0;
  42   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  43
  44   ASSERT(VirtualMemoryMap != NULL);
  45
  46   VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages(EFI_SIZE_TO_PAGES (sizeof(ARM_MEMORY_REGION_DESCRIPTOR) * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
  47   if (VirtualMemoryTable == NULL) {
  48     return;
  49   }
  50
  51   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
  52     CacheAttributes = DDR_ATTRIBUTES_CACHED;
  53   } else {
  54     CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
  55   }
  56
  57   // ReMap (Either NOR Flash or DRAM)
  58   VirtualMemoryTable[Index].PhysicalBase = PcdGet32(PcdSystemMemoryBase);
  59   VirtualMemoryTable[Index].VirtualBase  = PcdGet32(PcdSystemMemoryBase);
  60   VirtualMemoryTable[Index].Length       = PcdGet32(PcdSystemMemorySize);
  61   VirtualMemoryTable[Index].Attributes   = CacheAttributes;
  62
  63   // SOC Registers. L3 interconnects
  64   VirtualMemoryTable[++Index].PhysicalBase = SOC_REGISTERS_L3_PHYSICAL_BASE;
  65   VirtualMemoryTable[Index].VirtualBase  = SOC_REGISTERS_L3_PHYSICAL_BASE;
  66   VirtualMemoryTable[Index].Length       = SOC_REGISTERS_L3_PHYSICAL_LENGTH;
  67   VirtualMemoryTable[Index].Attributes   = SOC_REGISTERS_L3_ATTRIBUTES;
  68
  69   // SOC Registers. L4 interconnects
  70   VirtualMemoryTable[++Index].PhysicalBase = SOC_REGISTERS_L4_PHYSICAL_BASE;
  71   VirtualMemoryTable[Index].VirtualBase  = SOC_REGISTERS_L4_PHYSICAL_BASE;
  72   VirtualMemoryTable[Index].Length       = SOC_REGISTERS_L4_PHYSICAL_LENGTH;
  73   VirtualMemoryTable[Index].Attributes   = SOC_REGISTERS_L4_ATTRIBUTES;
  74
  75   // End of Table
  76   VirtualMemoryTable[++Index].PhysicalBase = 0;
  77   VirtualMemoryTable[Index].VirtualBase  = 0;
  78   VirtualMemoryTable[Index].Length       = 0;
  79   VirtualMemoryTable[Index].Attributes   = (ARM_MEMORY_REGION_ATTRIBUTES)0;
  80
  81   ASSERT((Index + 1) == MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS);
  82
  83   *VirtualMemoryMap = VirtualMemoryTable;
  84 }
  85
  86 /**
  87   Return the EFI Memory Map of your platform
  88
  89   This EFI Memory Map of the System Memory is used by MemoryInitPei module to create the Resource
  90   Descriptor HOBs used by DXE core.
  91
  92   @param[out]   EfiMemoryMap        Array of ARM_SYSTEM_MEMORY_REGION_DESCRIPTOR describing an
  93                                     EFI Memory region. This array must be ended by a zero-filled entry
  94
  95 **/
  96 EFI_STATUS
  97 ArmPlatformGetAdditionalSystemMemory (
  98   OUT ARM_SYSTEM_MEMORY_REGION_DESCRIPTOR** EfiMemoryMap
  99   )
 100 {
 101   return EFI_UNSUPPORTED;
 102 }