ArmPlatformPkg/ArmVExpressPkg/Library/ArmVExpressLibRTSM/RTSMFoundationMem.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2013, 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/IoLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20 #include <ArmPlatform.h>
  21
  22 // Number of Virtual Memory Map Descriptors without a Logic Tile
  23 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          4
  24
  25 // DDR attributes
  26 #define DDR_ATTRIBUTES_CACHED           ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
  27 #define DDR_ATTRIBUTES_UNCACHED         ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
  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 on your platform.
  33
  34   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR describing a Physical-to-
  35                                     Virtual Memory mapping. This array must be ended by a zero-filled
  36                                     entry
  37
  38 **/
  39 VOID
  40 ArmPlatformGetVirtualMemoryMap (
  41   IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
  42   )
  43 {
  44   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
  45   UINTN                         Index = 0;
  46   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
  47
  48   ASSERT(VirtualMemoryMap != NULL);
  49
  50   VirtualMemoryTable = (ARM_MEMORY_REGION_DESCRIPTOR*)AllocatePages(EFI_SIZE_TO_PAGES (sizeof(ARM_MEMORY_REGION_DESCRIPTOR) * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS));
  51   if (VirtualMemoryTable == NULL) {
  52       return;
  53   }
  54
  55   if (FeaturePcdGet(PcdCacheEnable) == TRUE) {
  56       CacheAttributes = DDR_ATTRIBUTES_CACHED;
  57   } else {
  58       CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
  59   }
  60
  61   // DDR
  62   VirtualMemoryTable[Index].PhysicalBase = ARM_VE_DRAM_BASE;
  63   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_DRAM_BASE;
  64   VirtualMemoryTable[Index].Length       = ARM_VE_DRAM_SZ;
  65   VirtualMemoryTable[Index].Attributes   = CacheAttributes;
  66
  67   // CPU peripherals. TRM. Manual says not all of them are implemented.
  68   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_ON_CHIP_PERIPH_BASE;
  69   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_ON_CHIP_PERIPH_BASE;
  70   VirtualMemoryTable[Index].Length       = ARM_VE_ON_CHIP_PERIPH_SZ;
  71   VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  72
  73   // Peripheral CS2 and CS3
  74   VirtualMemoryTable[++Index].PhysicalBase = ARM_VE_SMB_PERIPH_BASE;
  75   VirtualMemoryTable[Index].VirtualBase  = ARM_VE_SMB_PERIPH_BASE;
  76   VirtualMemoryTable[Index].Length       = 2 * ARM_VE_SMB_PERIPH_SZ;
  77   VirtualMemoryTable[Index].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
  78
  79   // End of Table
  80   VirtualMemoryTable[++Index].PhysicalBase = 0;
  81   VirtualMemoryTable[Index].VirtualBase  = 0;
  82   VirtualMemoryTable[Index].Length       = 0;
  83   VirtualMemoryTable[Index].Attributes   = (ARM_MEMORY_REGION_ATTRIBUTES)0;
  84
  85   *VirtualMemoryMap = VirtualMemoryTable;
  86 }