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      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 = PcdGet64 (PcdSystemMemoryBase);
     59   VirtualMemoryTable[Index].VirtualBase  = PcdGet64 (PcdSystemMemoryBase);
     60   VirtualMemoryTable[Index].Length       = PcdGet64 (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