/*++

Copyright (c) 2004 - 2006, Intel Corporation                                                         
All rights reserved. This program and the accompanying materials                          
are licensed and made available under the terms and conditions of the BSD License         
which accompanies this distribution.  The full text of the license may be found at        
http://opensource.org/licenses/bsd-license.php                                            
                                                                                          
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.              


Module Name:

  PeiServicesTablePointer.c
  
Abstract: 

  PEI Services Table Pointer Library.

--*/

#include "PeiServicesTablePointerLibInternals.h"

/**
  The function returns the pointer to PeiServices.

  The function returns the pointer to PeiServices.
  It will ASSERT() if the pointer to PeiServices is NULL.

  @retval  The pointer to PeiServices.

**/
EFI_PEI_SERVICES **
EFIAPI
GetPeiServicesTablePointer (
  VOID
  )
{
  EFI_PEI_SERVICES  **PeiServices;

#if (PI_SPECIFICATION_VERSION < 0x00010000)
  PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr1 ();
#else
  PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr7 ();
#endif
  ASSERT (PeiServices != NULL);
  return PeiServices;
}

/**
  The constructor function caches the pointer to PEI services.

  The constructor function caches the pointer to PEI services.
  It will always return EFI_SUCCESS.

  @param  FfsHeader   Pointer to FFS header the loaded driver.
  @param  PeiServices Pointer to the PEI services.

  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.

**/
EFI_STATUS
EFIAPI
PeiServicesTablePointerLibConstructor (
  IN EFI_FFS_FILE_HEADER  *FfsHeader,
  IN EFI_PEI_SERVICES     **PeiServices
  )
{
#if (PI_SPECIFICATION_VERSION < 0x00010000)
  AsmWriteKr1 ((UINT64)(UINTN)PeiServices);
#endif
  return EFI_SUCCESS;
}
