StandaloneMmCoreHobLib/AArch64/StandaloneMmCoreHobLibInternal.c

   1 /** @file
   2   HOB Library implementation for Standalone MM Core.
   3
   4 Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
   5 Copyright (c) 2017 - 2018, ARM Limited. All rights reserved.<BR>
   6
   7 This program and the accompanying materials
   8 are licensed and made available under the terms and conditions of the BSD License
   9 which accompanies this distribution.  The full text of the license may be found at
  10 http://opensource.org/licenses/bsd-license.php.
  11
  12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14
  15 **/
  16
  17 #include <PiMm.h>
  18
  19 #include <Library/HobLib.h>
  20 #include <Library/DebugLib.h>
  21 #include <Library/BaseMemoryLib.h>
  22
  23 #include <Guid/MemoryAllocationHob.h>
  24
  25 //
  26 // Cache copy of HobList pointer.
  27 //
  28 extern VOID *gHobList;
  29
  30 EFI_HOB_HANDOFF_INFO_TABLE*
  31 HobConstructor (
  32   IN VOID   *EfiMemoryBegin,
  33   IN UINTN  EfiMemoryLength,
  34   IN VOID   *EfiFreeMemoryBottom,
  35   IN VOID   *EfiFreeMemoryTop
  36   )
  37 {
  38   EFI_HOB_HANDOFF_INFO_TABLE  *Hob;
  39   EFI_HOB_GENERIC_HEADER      *HobEnd;
  40
  41   Hob    = EfiFreeMemoryBottom;
  42   HobEnd = (EFI_HOB_GENERIC_HEADER *)(Hob+1);
  43
  44   Hob->Header.HobType     = EFI_HOB_TYPE_HANDOFF;
  45   Hob->Header.HobLength   = sizeof (EFI_HOB_HANDOFF_INFO_TABLE);
  46   Hob->Header.Reserved    = 0;
  47
  48   HobEnd->HobType     = EFI_HOB_TYPE_END_OF_HOB_LIST;
  49   HobEnd->HobLength   = sizeof (EFI_HOB_GENERIC_HEADER);
  50   HobEnd->Reserved    = 0;
  51
  52   Hob->Version             = EFI_HOB_HANDOFF_TABLE_VERSION;
  53   Hob->BootMode            = BOOT_WITH_FULL_CONFIGURATION;
  54
  55   Hob->EfiMemoryTop        = (UINTN)EfiMemoryBegin + EfiMemoryLength;
  56   Hob->EfiMemoryBottom     = (UINTN)EfiMemoryBegin;
  57   Hob->EfiFreeMemoryTop    = (UINTN)EfiFreeMemoryTop;
  58   Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS)(UINTN)(HobEnd+1);
  59   Hob->EfiEndOfHobList     = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
  60
  61   gHobList = Hob;
  62
  63   return Hob;
  64 }