EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12
  13 Module Name:
  14
  15   PeiServicesTablePointer.c
  16
  17 Abstract:
  18
  19   PEI Services Table Pointer Library.
  20
  21 --*/
  22
  23 #include "PeiServicesTablePointerLibInternals.h"
  24
  25 /**
  26   The function returns the pointer to PeiServices.
  27
  28   The function returns the pointer to PeiServices.
  29   It will ASSERT() if the pointer to PeiServices is NULL.
  30
  31   @retval  The pointer to PeiServices.
  32
  33 **/
  34 EFI_PEI_SERVICES **
  35 EFIAPI
  36 GetPeiServicesTablePointer (
  37   VOID
  38   )
  39 {
  40   EFI_PEI_SERVICES  **PeiServices;
  41
  42 #if (PI_SPECIFICATION_VERSION < 0x00010000)
  43   PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr1 ();
  44 #else
  45   PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr7 ();
  46 #endif
  47   ASSERT (PeiServices != NULL);
  48   return PeiServices;
  49 }
  50
  51 /**
  52   The constructor function caches the pointer to PEI services.
  53
  54   The constructor function caches the pointer to PEI services.
  55   It will always return EFI_SUCCESS.
  56
  57   @param  FfsHeader   Pointer to FFS header the loaded driver.
  58   @param  PeiServices Pointer to the PEI services.
  59
  60   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  61
  62 **/
  63 EFI_STATUS
  64 EFIAPI
  65 PeiServicesTablePointerLibConstructor (
  66   IN EFI_FFS_FILE_HEADER  *FfsHeader,
  67   IN EFI_PEI_SERVICES     **PeiServices
  68   )
  69 {
  70 #if (PI_SPECIFICATION_VERSION < 0x00010000)
  71   AsmWriteKr1 ((UINT64)(UINTN)PeiServices);
  72 #endif
  73   return EFI_SUCCESS;
  74 }