MdePkg/Library/PeiServicesTablePointerLibIdt/PeiServicesTablePointer.c

   1 /** @file
   2   PEI Services Table Pointer Library for IA-32 and X64.
   3
   4   Copyright (c) 2006 - 2007, Intel Corporation.<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "InternalPeiServicesTablePointer.h"
  16
  17
  18 /**
  19
  20   The function returns the pointer to PeiServicee following
  21   PI1.0.
  22
  23   For IA32, the four-bytes field immediately prior to new IDT
  24   base addres is used to save the EFI_PEI_SERVICES**.
  25   For x64, the eight-bytes field immediately prior to new IDT
  26   base addres is used to save the EFI_PEI_SERVICES**
  27   @retval  The pointer to PeiServices.
  28
  29 **/
  30 EFI_PEI_SERVICES **
  31 EFIAPI
  32 GetPeiServicesTablePointer (
  33   VOID
  34   )
  35 {
  36   EFI_PEI_SERVICES  **PeiServices;
  37
  38   PeiServices = (EFI_PEI_SERVICES **) AsmPeiSevicesTablePointer ();
  39   ASSERT (PeiServices != NULL);
  40   return PeiServices;
  41 }
  42