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   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 <PiPei.h>
  18 #include <Library/BaseLib.h>
  19 #include <Library/MemoryAllocationLib.h>
  20
  21
  22 UINTN                   gThunkPpiListSize = 0;
  23 EFI_PEI_PPI_DESCRIPTOR  *gThunkPpiList = NULL;
  24
  25
  26
  27 EFI_PEI_PPI_DESCRIPTOR *
  28 GetThunkPpiList (
  29   VOID
  30   )
  31 {
  32   UINTN Index;
  33
  34   if (gThunkPpiList == NULL) {
  35     return NULL;
  36   }
  37
  38   Index = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR)) - 1;
  39   gThunkPpiList[Index].Flags |= EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST;
  40
  41   return gThunkPpiList;
  42 }
  43
  44
  45 EFI_STATUS
  46 EFIAPI
  47 AddThunkPpi (
  48   IN  UINTN     Flags,
  49   IN  EFI_GUID  *Guid,
  50   IN  VOID      *Ppi
  51   )
  52 {
  53   UINTN Index;
  54
  55   gThunkPpiList = ReallocatePool (
  56                     gThunkPpiListSize,
  57                     gThunkPpiListSize + sizeof (EFI_PEI_PPI_DESCRIPTOR),
  58                     gThunkPpiList
  59                     );
  60   if (gThunkPpiList == NULL) {
  61     return EFI_OUT_OF_RESOURCES;
  62   }
  63
  64   Index = (gThunkPpiListSize/sizeof (EFI_PEI_PPI_DESCRIPTOR));
  65   gThunkPpiList[Index].Flags = Flags;
  66   gThunkPpiList[Index].Guid  = Guid;
  67   gThunkPpiList[Index].Ppi   = Ppi;
  68   gThunkPpiListSize += sizeof (EFI_PEI_PPI_DESCRIPTOR);
  69
  70   return EFI_SUCCESS;
  71 }
  72
  73
  74
  75
  76