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      1 /** @file
      2 *
      3 *  Copyright (c) 2014, Linaro 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/BaseMemoryLib.h>
     18 #include <Library/PcdLib.h>
     19 #include <Library/IoLib.h>
     20 #include <Library/MemoryAllocationLib.h>
     21 #include <ArmPlatform.h>
     22 
     23 // Number of Virtual Memory Map Descriptors
     24 #define MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS          5
     25 
     26 // DDR attributes
     27 #define DDR_ATTRIBUTES_CACHED    ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK
     28 #define DDR_ATTRIBUTES_UNCACHED  ARM_MEMORY_REGION_ATTRIBUTE_UNCACHED_UNBUFFERED
     29 
     30 EFI_PHYSICAL_ADDRESS
     31 ArmGetPhysAddrTop (
     32   VOID
     33   );
     34 
     35 /**
     36   Return the Virtual Memory Map of your platform
     37 
     38   This Virtual Memory Map is used by MemoryInitPei Module to initialize the MMU
     39   on your platform.
     40 
     41   @param[out]   VirtualMemoryMap    Array of ARM_MEMORY_REGION_DESCRIPTOR
     42                                     describing a Physical-to-Virtual Memory
     43                                     mapping. This array must be ended by a
     44                                     zero-filled entry
     45 
     46 **/
     47 VOID
     48 ArmPlatformGetVirtualMemoryMap (
     49   IN ARM_MEMORY_REGION_DESCRIPTOR** VirtualMemoryMap
     50   )
     51 {
     52   ARM_MEMORY_REGION_ATTRIBUTES  CacheAttributes;
     53   ARM_MEMORY_REGION_DESCRIPTOR  *VirtualMemoryTable;
     54 
     55   ASSERT (VirtualMemoryMap != NULL);
     56 
     57   VirtualMemoryTable = AllocatePages (
     58                          EFI_SIZE_TO_PAGES (
     59                            sizeof (ARM_MEMORY_REGION_DESCRIPTOR)
     60                            * MAX_VIRTUAL_MEMORY_MAP_DESCRIPTORS
     61                            )
     62                          );
     63 
     64   if (VirtualMemoryTable == NULL) {
     65     DEBUG ((EFI_D_ERROR, "%a: Error: Failed AllocatePages()\n", __FUNCTION__));
     66     return;
     67   }
     68 
     69   if (FeaturePcdGet (PcdCacheEnable) == TRUE) {
     70     CacheAttributes = DDR_ATTRIBUTES_CACHED;
     71   } else {
     72     CacheAttributes = DDR_ATTRIBUTES_UNCACHED;
     73   }
     74 
     75   // System DRAM
     76   VirtualMemoryTable[0].PhysicalBase = PcdGet64 (PcdSystemMemoryBase);
     77   VirtualMemoryTable[0].VirtualBase  = VirtualMemoryTable[0].PhysicalBase;
     78   VirtualMemoryTable[0].Length       = PcdGet64 (PcdSystemMemorySize);
     79   VirtualMemoryTable[0].Attributes   = CacheAttributes;
     80 
     81   DEBUG ((EFI_D_INFO, "%a: Dumping System DRAM Memory Map:\n"
     82       "\tPhysicalBase: 0x%lX\n"
     83       "\tVirtualBase: 0x%lX\n"
     84       "\tLength: 0x%lX\n",
     85       __FUNCTION__,
     86       VirtualMemoryTable[0].PhysicalBase,
     87       VirtualMemoryTable[0].VirtualBase,
     88       VirtualMemoryTable[0].Length));
     89 
     90   // Peripheral space before DRAM
     91   VirtualMemoryTable[1].PhysicalBase = 0x0;
     92   VirtualMemoryTable[1].VirtualBase  = 0x0;
     93   VirtualMemoryTable[1].Length       = VirtualMemoryTable[0].PhysicalBase;
     94   VirtualMemoryTable[1].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
     95 
     96   // Peripheral space after DRAM
     97   VirtualMemoryTable[2].PhysicalBase = VirtualMemoryTable[0].Length + VirtualMemoryTable[1].Length;
     98   VirtualMemoryTable[2].VirtualBase  = VirtualMemoryTable[2].PhysicalBase;
     99   VirtualMemoryTable[2].Length       = MIN (1ULL << FixedPcdGet8 (PcdPrePiCpuMemorySize),
    100                                          ArmGetPhysAddrTop ()) -
    101                                        VirtualMemoryTable[2].PhysicalBase;
    102   VirtualMemoryTable[2].Attributes   = ARM_MEMORY_REGION_ATTRIBUTE_DEVICE;
    103 
    104   // Remap the FD region as normal executable memory
    105   VirtualMemoryTable[3].PhysicalBase = FixedPcdGet64 (PcdFdBaseAddress);
    106   VirtualMemoryTable[3].VirtualBase  = VirtualMemoryTable[3].PhysicalBase;
    107   VirtualMemoryTable[3].Length       = FixedPcdGet32 (PcdFdSize);
    108   VirtualMemoryTable[3].Attributes   = CacheAttributes;
    109 
    110   // End of Table
    111   ZeroMem (&VirtualMemoryTable[4], sizeof (ARM_MEMORY_REGION_DESCRIPTOR));
    112 
    113   *VirtualMemoryMap = VirtualMemoryTable;
    114 }
    115