MdePkg/Library/PeiServicesTablePointerLibMm7/PeiServicesTablePointer.c

   1 /** @file
   2   PEI Services Table Pointer Library.
   3
   4   Copyright (c) 2006, 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   Module Name:  PeiServicesTablePointer.c
  14
  15 **/
  16
  17
  18 /**
  19   The function returns the pointer to PeiServices.
  20
  21   The function returns the pointer to PeiServices.
  22   It will ASSERT() if the pointer to PeiServices is NULL.
  23
  24   @retval  The pointer to PeiServices.
  25
  26 **/
  27 EFI_PEI_SERVICES **
  28 GetPeiServicesTablePointer (
  29   VOID
  30   )
  31 {
  32   EFI_PEI_SERVICES  **PeiServices;
  33
  34   PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadMm7 ();
  35   ASSERT (PeiServices != NULL);
  36   return PeiServices;
  37 }
  38
  39 /**
  40   The constructor function caches the pointer to PEI services.
  41
  42   The constructor function caches the pointer to PEI services.
  43   It will always return EFI_SUCCESS.
  44
  45   @param  FfsHeader   Pointer to FFS header the loaded driver.
  46   @param  PeiServices Pointer to the PEI services.
  47
  48   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  49
  50 **/
  51 EFI_STATUS
  52 PeiServicesTablePointerLibConstructor (
  53   IN EFI_FFS_FILE_HEADER  *FfsHeader,
  54   IN EFI_PEI_SERVICES     **PeiServices
  55   )
  56 {
  57   AsmWriteMm7 ((UINT64)(UINTN)PeiServices);
  58   return EFI_SUCCESS;
  59 }