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      1 /*++ @file
      2 The PCD, gEmulatorPkgTokenSpaceGuid.PcdPeiServicesTablePage, points to a magic page
      3 of memory that is like SRAM on an embedded system. This file defines what goes
      4 where in the magic page.
      5 
      6 Copyright (c) 2011, Apple Inc. All rights reserved.<BR>
      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 #ifndef __EMU_MAGIC_PAGE_LIB_H__
     18 #define __EMU_MAGIC_PAGE_LIB_H__
     19 
     20 #include <PiPei.h>
     21 #include <Library/PcdLib.h>
     22 #include <Protocol/EmuThunk.h>
     23 
     24 typedef struct {
     25   // Used by PEI Core and PEIMs to store the PEI Services pointer.
     26   // Privilege issues prevent using the PI mechanism in the emulator.
     27   CONST EFI_PEI_SERVICES **PeiServicesTablePointer;
     28 
     29   // Used by SecPeiServicesLib
     30   EFI_PEI_PPI_DESCRIPTOR  *PpiList;
     31 
     32   // Needed by PEI PEI PeCoffLoaderExtraActionLib
     33   EMU_THUNK_PROTOCOL   *Thunk;
     34 } EMU_MAGIC_PAGE_LAYOUT;
     35 
     36 #define EMU_MAGIC_PAGE() ((EMU_MAGIC_PAGE_LAYOUT *)((UINTN)PcdGet64 (PcdPeiServicesTablePage)))
     37 
     38 #endif
     39