StandaloneMmPkg/Library/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 SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #include <PiMm.h>
  12
  13 #include <Library/HobLib.h>
  14 #include <Library/DebugLib.h>
  15 #include <Library/BaseMemoryLib.h>
  16
  17 #include <Guid/MemoryAllocationHob.h>
  18
  19 //
  20 // Cache copy of HobList pointer.
  21 //
  22 extern VOID *gHobList;
  23
  24 EFI_HOB_HANDOFF_INFO_TABLE*
  25 HobConstructor (
  26   IN VOID   *EfiMemoryBegin,
  27   IN UINTN  EfiMemoryLength,
  28   IN VOID   *EfiFreeMemoryBottom,
  29   IN VOID   *EfiFreeMemoryTop
  30   )
  31 {
  32   EFI_HOB_HANDOFF_INFO_TABLE  *Hob;
  33   EFI_HOB_GENERIC_HEADER      *HobEnd;
  34
  35   Hob    = EfiFreeMemoryBottom;
  36   HobEnd = (EFI_HOB_GENERIC_HEADER *)(Hob+1);
  37
  38   Hob->Header.HobType     = EFI_HOB_TYPE_HANDOFF;
  39   Hob->Header.HobLength   = sizeof (EFI_HOB_HANDOFF_INFO_TABLE);
  40   Hob->Header.Reserved    = 0;
  41
  42   HobEnd->HobType     = EFI_HOB_TYPE_END_OF_HOB_LIST;
  43   HobEnd->HobLength   = sizeof (EFI_HOB_GENERIC_HEADER);
  44   HobEnd->Reserved    = 0;
  45
  46   Hob->Version             = EFI_HOB_HANDOFF_TABLE_VERSION;
  47   Hob->BootMode            = BOOT_WITH_FULL_CONFIGURATION;
  48
  49   Hob->EfiMemoryTop        = (UINTN)EfiMemoryBegin + EfiMemoryLength;
  50   Hob->EfiMemoryBottom     = (UINTN)EfiMemoryBegin;
  51   Hob->EfiFreeMemoryTop    = (UINTN)EfiFreeMemoryTop;
  52   Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS)(UINTN)(HobEnd+1);
  53   Hob->EfiEndOfHobList     = (EFI_PHYSICAL_ADDRESS)(UINTN)HobEnd;
  54
  55   gHobList = Hob;
  56
  57   return Hob;
  58 }