Enhanced the <Build_Library> macro to check OBJECTS property in case it's empty

[mirror_edk2.git] / MdePkg / Library / PeiServicesTablePointerLibKr1 / PeiServicesTablePointer.c

/*++\r
\r
Copyright (c) 2006 Intel Corporation. All rights reserved\r
This software and associated documentation (if any) is furnished\r
under a license and may only be used or copied in accordance\r
with the terms of the license. Except as permitted by such\r
license, no part of this software or documentation may be\r
reproduced, stored in a retrieval system, or transmitted in any\r
form or by any means without the express written consent of\r
Intel Corporation.\r
\r
\r
Module Name:\r
\r
  PeiServicesTablePointer.c\r
\r
Abstract:\r
\r
  PEI Services Table Pointer Library.\r
  \r
--*/\r
\r
\r
/**\r
  Reads the current value of Kr1.\r
\r
  @return The current value of Kr1.\r
\r
**/\r
UINT64\r
EFIAPI\r
AsmReadKr1 (\r
  VOID\r
  );\r
\r
/**\r
  Writes the current value of Kr1.\r
\r
  @param  Value The 64-bit value to write to Kr1.\r
\r
**/\r
VOID\r
EFIAPI\r
AsmWriteKr1 (\r
  IN      UINT64                    Value\r
  );\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
  @retval  The pointer to PeiServices.\r
\r
**/\r
EFI_PEI_SERVICES **\r
EFIAPI\r
GetPeiServicesTablePointer (\r
  VOID\r
  )\r
{\r
  EFI_PEI_SERVICES  **PeiServices;\r
\r
  PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr1 ();\r
  ASSERT (PeiServices != NULL);\r
  return PeiServices;\r
}\r
\r
/**\r
  The constructor function caches the pointer to PEI services.\r
\r
  The constructor function caches the pointer to PEI services.\r
  It will always return EFI_SUCCESS.\r
\r
  @param  FfsHeader   Pointer to FFS header the loaded driver.\r
  @param  PeiServices Pointer to the PEI services.\r
\r
  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PeiServicesTablePointerLibConstructor (\r
  IN EFI_FFS_FILE_HEADER  *FfsHeader,\r
  IN EFI_PEI_SERVICES     **PeiServices\r
  )\r
{\r
  AsmWriteKr1 ((UINT64)(UINTN)PeiServices);\r
  return EFI_SUCCESS;\r
}\r