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 #include <PiPei.h>
  19
  20
  21 #include <Library/PeiServicesTablePointerLib.h>
  22 #include <Library/BaseLib.h>
  23 #include <Library/DebugLib.h>
  24
  25 VOID
  26 EFIAPI
  27 SetPeiServicesTablePointer (
  28   IN EFI_PEI_SERVICES     **PeiServices
  29   )
  30 {
  31   AsmWriteMm7 ((UINT64)(UINTN)PeiServices);
  32 }
  33
  34 /**
  35   The function returns the pointer to PeiServices.
  36
  37   The function returns the pointer to PeiServices.
  38   It will ASSERT() if the pointer to PeiServices is NULL.
  39
  40   @retval  The pointer to PeiServices.
  41
  42 **/
  43 EFI_PEI_SERVICES **
  44 EFIAPI
  45 GetPeiServicesTablePointer (
  46   VOID
  47   )
  48 {
  49   EFI_PEI_SERVICES  **PeiServices;
  50
  51   PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadMm7 ();
  52   ASSERT (PeiServices != NULL);
  53   return PeiServices;
  54 }
  55
  56 /**
  57   The constructor function caches the pointer to PEI services.
  58
  59   The constructor function caches the pointer to PEI services.
  60   It will always return EFI_SUCCESS.
  61
  62   @param  FfsHeader   Pointer to FFS header the loaded driver.
  63   @param  PeiServices Pointer to the PEI services.
  64
  65   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  66
  67 **/
  68 EFI_STATUS
  69 EFIAPI
  70 PeiServicesTablePointerLibConstructor (
  71   IN EFI_PEI_FILE_HANDLE  *FfsHeader,
  72   IN EFI_PEI_SERVICES     **PeiServices
  73   )
  74 {
  75   AsmWriteMm7 ((UINT64)(UINTN)PeiServices);
  76   return EFI_SUCCESS;
  77 }