ArmPlatformPkg/Library/ArmPlatformGlobalVariableLib/Sec/SecArmPlatformGlobalVariableLib.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 <Uefi.h>
  16 #include <Library/ArmPlatformGlobalVariableLib.h>
  17 #include <Library/BaseLib.h>
  18 #include <Library/BaseMemoryLib.h>
  19 #include <Library/PcdLib.h>
  20
  21 //TODO: RemoveMe
  22 //#include <Library/DebugLib.h>
  23
  24 VOID
  25 ArmPlatformGetGlobalVariable (
  26   IN  UINTN     VariableOffset,
  27   IN  UINTN     VariableSize,
  28   OUT VOID*     Variable
  29   )
  30 {
  31   UINTN  GlobalVariableBase;
  32
  33   GlobalVariableBase = PcdGet32 (PcdCPUCoresSecStackBase) + PcdGet32 (PcdCPUCoreSecPrimaryStackSize) - PcdGet32 (PcdSecGlobalVariableSize) + VariableOffset;
  34
  35   if (VariableSize == 4) {
  36     *(UINT32*)Variable = ReadUnaligned32 ((CONST UINT32*)(GlobalVariableBase + VariableOffset));
  37   } else if (VariableSize == 8) {
  38     *(UINT32*)Variable = ReadUnaligned64 ((CONST UINT64*)(GlobalVariableBase + VariableOffset));
  39   } else {
  40     CopyMem (Variable, (VOID*)(GlobalVariableBase + VariableOffset), VariableSize);
  41   }
  42
  43   //DEBUG((EFI_D_ERROR,"++ GET Offset[%d] = 0x%x\n",VariableOffset,*(UINTN*)Variable));
  44 }
  45
  46 VOID
  47 ArmPlatformSetGlobalVariable (
  48   IN  UINTN     VariableOffset,
  49   IN  UINTN     VariableSize,
  50   OUT VOID*     Variable
  51   )
  52 {
  53   UINTN  GlobalVariableBase;
  54
  55   GlobalVariableBase = PcdGet32 (PcdCPUCoresSecStackBase) + PcdGet32 (PcdCPUCoreSecPrimaryStackSize) - PcdGet32 (PcdSecGlobalVariableSize) + VariableOffset;
  56
  57   if (VariableSize == 4) {
  58     WriteUnaligned32 ((UINT32*)(GlobalVariableBase + VariableOffset), *(UINT32*)Variable);
  59   } else if (VariableSize == 8) {
  60     WriteUnaligned64 ((UINT64*)(GlobalVariableBase + VariableOffset), *(UINT64*)Variable);
  61   } else {
  62     CopyMem ((VOID*)(GlobalVariableBase + VariableOffset), Variable, VariableSize);
  63   }
  64
  65   //DEBUG((EFI_D_ERROR,"++ SET Offset[%d] = 0x%x\n",VariableOffset,*(UINTN*)Variable));
  66 }
  67