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 - 2008, 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   @return  The pointer to PeiServices.
  27
  28 **/
  29 CONST EFI_PEI_SERVICES **
  30 EFIAPI
  31 GetPeiServicesTablePointer (
  32   VOID
  33   )
  34 {
  35   CONST EFI_PEI_SERVICES  **PeiServices;
  36
  37   PeiServices = (CONST EFI_PEI_SERVICES **)(UINTN)AsmReadKr7 ();
  38   ASSERT (PeiServices != NULL);
  39   return PeiServices;
  40 }
  41
  42 /**
  43   The function set the pointer of PEI services in KR7 register
  44   according to PI specification.
  45
  46   @param    PeiServicesTablePointer   The address of PeiServices pointer.
  47 **/
  48 VOID
  49 EFIAPI
  50 SetPeiServicesTablePointer (
  51   IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer
  52   )
  53 {
  54   AsmWriteKr7 ((UINT64)(UINTN)PeiServicesTablePointer);
  55 }
  56
  57
  58
  59