MdePkg/Library/PeiServicesTablePointerLibKr7/PeiServicesTablePointer.c

   1 /** @file
   2   PEI Services Table Pointer Library implementation for IPF that uses Kernel
   3   Register 7 to store the pointer.
   4
   5   Copyright (c) 2006 - 2007, Intel Corporation.<BR>
   6   All rights reserved. This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <PiPei.h>
  17 #include <Library/BaseLib.h>
  18 #include <Library/DebugLib.h>
  19
  20 /**
  21   The function returns the pointer to PeiServices.
  22
  23   The function returns the pointer to PeiServices.
  24   It will ASSERT() if the pointer to PeiServices is NULL.
  25
  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 **)(UINTN)AsmReadKr7 ();
  38   ASSERT (PeiServices != NULL);
  39   return PeiServices;
  40 }
  41
  42 /**
  43   The constructor function caches the pointer to PEI services.
  44
  45   The constructor function caches the pointer to PEI services.
  46   It will always return EFI_SUCCESS.
  47
  48   @param  FfsHeader   Pointer to FFS header the loaded driver.
  49   @param  PeiServices Pointer to the PEI services.
  50
  51   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  52
  53 **/
  54 EFI_STATUS
  55 EFIAPI
  56 PeiServicesTablePointerLibConstructor (
  57   IN EFI_FFS_FILE_HEADER  *FfsHeader,
  58   IN EFI_PEI_SERVICES     **PeiServices
  59   )
  60 {
  61   AsmWriteKr7 ((UINT64)(UINTN)PeiServices);
  62   return EFI_SUCCESS;
  63 }
  64
  65