ArmPlatformPkg/Library/PrePiHobListPointerLib/PrePiHobListPointer.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 <PiPei.h>
  16 #include <Library/PrePiHobListPointerLib.h>
  17 #include <Library/DebugLib.h>
  18 #include <Library/PcdLib.h>
  19
  20 /**
  21   Returns the pointer to the HOB list.
  22
  23   This function returns the pointer to first HOB in the list.
  24
  25   @return The pointer to the HOB list.
  26
  27 **/
  28 VOID *
  29 EFIAPI
  30 PrePeiGetHobList (
  31   VOID
  32   )
  33 {
  34   return (VOID *)*(UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +
  35                            PcdGet32 (PcdCPUCoresNonSecStackSize) -
  36                            PcdGet32 (PcdPeiGlobalVariableSize) +
  37                            PcdGet32 (PcdHobListPtrGlobalOffset));
  38 }
  39
  40
  41
  42 /**
  43   Updates the pointer to the HOB list.
  44
  45   @param  HobList       Hob list pointer to store
  46
  47 **/
  48 EFI_STATUS
  49 EFIAPI
  50 PrePeiSetHobList (
  51   IN  VOID      *HobList
  52   )
  53 {
  54   UINTN* HobListPtr;
  55
  56   HobListPtr = (UINTN*)(PcdGet32 (PcdCPUCoresNonSecStackBase) +
  57                         PcdGet32 (PcdCPUCoresNonSecStackSize) -
  58                         PcdGet32 (PcdPeiGlobalVariableSize) +
  59                         PcdGet32 (PcdHobListPtrGlobalOffset));
  60
  61   *HobListPtr = (UINTN)HobList;
  62
  63   return EFI_SUCCESS;
  64 }
  65