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   The function returns the pointer to PeiServicee following
  20   PI1.0.
  21
  22   For IA32, the four-bytes field immediately prior to new IDT
  23   base addres is used to save the EFI_PEI_SERVICES**.
  24   For x64, the eight-bytes field immediately prior to new IDT
  25   base addres is used to save the EFI_PEI_SERVICES**
  26   @retval  The pointer to PeiServices.
  27
  28 **/
  29 EFI_PEI_SERVICES **
  30 EFIAPI
  31 GetPeiServicesTablePointer (
  32   VOID
  33   )
  34 {
  35   EFI_PEI_SERVICES  **PeiServices;
  36
  37   PeiServices = (EFI_PEI_SERVICES **) AsmPeiSevicesTablePointer ();
  38   ASSERT (PeiServices != NULL);
  39   return PeiServices;
  40 }
  41