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[mirror_edk2.git] / MdePkg / Library / PeiServicesTablePointerLibKr7 / PeiServicesTablePointer.c

/** @file\r
  PEI Services Table Pointer Library implementation for IPF that uses Kernel\r
  Register 7 to store the pointer.\r
\r
  Copyright (c) 2006 - 2008, Intel Corporation.<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <PiPei.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
\r
/**\r
  The function returns the pointer to PeiServices.\r
\r
  The function returns the pointer to PeiServices.\r
  It will ASSERT() if the pointer to PeiServices is NULL.\r
\r
  @return  The pointer to PeiServices.\r
\r
**/\r
CONST EFI_PEI_SERVICES **\r
EFIAPI\r
GetPeiServicesTablePointer (\r
  VOID\r
  )\r
{\r
  CONST EFI_PEI_SERVICES  **PeiServices;\r
\r
  PeiServices = (CONST EFI_PEI_SERVICES **)(UINTN)AsmReadKr7 ();\r
  ASSERT (PeiServices != NULL);\r
  return PeiServices;\r
}\r
\r
/**\r
  The function set the pointer of PEI services in KR7 register \r
  according to PI specification.\r
  \r
  @param    PeiServicesTablePointer   The address of PeiServices pointer.\r
**/\r
VOID\r
EFIAPI\r
SetPeiServicesTablePointer (\r
  IN CONST EFI_PEI_SERVICES ** PeiServicesTablePointer\r
  )\r
{\r
  AsmWriteKr7 ((UINT64)(UINTN)PeiServicesTablePointer);\r
}\r
  \r
\r
\r
\r