EmulatorPkg/Library/ThunkPpiList/ThunkPpiList.c

   1 /** @file
   2   Emulator Thunk to abstract OS services from pure EFI code
   3
   4   Copyright (c) 2008 - 2011, Apple Inc. All rights reserved.<BR>
   5   Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
   6
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #include <PiPei.h>
  12 #include <Library/BaseLib.h>
  13 #include <Library/MemoryAllocationLib.h>
  14
  15
  16 UINTN                   gThunkPpiListSize = 0;
  17 EFI_PEI_PPI_DESCRIPTOR  *gThunkPpiList = NULL;
  18
  19
  20
  21 EFI_PEI_PPI_DESCRIPTOR *
  22 GetThunkPpiList (
  23   VOID
  24   )
  25 {
  26   UINTN Index;
  27
  28   if (gThunkPpiList == NULL) {
  29     return NULL;
  30   }
  31
  32   Index = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR)) - 1;
  33   gThunkPpiList[Index].Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
  34
  35   return gThunkPpiList;
  36 }
  37
  38
  39 EFI_STATUS
  40 EFIAPI
  41 AddThunkPpi (
  42   IN  UINTN     Flags,
  43   IN  EFI_GUID  *Guid,
  44   IN  VOID      *Ppi
  45   )
  46 {
  47   UINTN Index;
  48
  49   gThunkPpiList = ReallocatePool (
  50                     gThunkPpiListSize,
  51                     gThunkPpiListSize + sizeof (EFI_PEI_PPI_DESCRIPTOR),
  52                     gThunkPpiList
  53                     );
  54   if (gThunkPpiList == NULL) {
  55     return EFI_OUT_OF_RESOURCES;
  56   }
  57
  58   Index = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR));
  59   gThunkPpiList[Index].Flags = Flags;
  60   gThunkPpiList[Index].Guid  = Guid;
  61   gThunkPpiList[Index].Ppi   = Ppi;
  62   gThunkPpiListSize += sizeof (EFI_PEI_PPI_DESCRIPTOR);
  63
  64   return EFI_SUCCESS;
  65 }
  66
  67
  68
  69
  70