OldMdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c

   1 /*++
   2
   3 Copyright (c) 2006 Intel Corporation. All rights reserved
   4 This software and associated documentation (if any) is furnished
   5 under a license and may only be used or copied in accordance
   6 with the terms of the license. Except as permitted by such
   7 license, no part of this software or documentation may be
   8 reproduced, stored in a retrieval system, or transmitted in any
   9 form or by any means without the express written consent of
  10 Intel Corporation.
  11
  12
  13 Module Name:
  14
  15   PeiServicesTablePointer.c
  16
  17 Abstract:
  18
  19   PEI Services Table Pointer Library.
  20
  21 --*/
  22
  23 /**
  24   The function returns the pointer to PeiServices.
  25
  26   The function returns the pointer to PeiServices.
  27   It will ASSERT() if the pointer to PeiServices is NULL.
  28
  29   @retval  The pointer to PeiServices.
  30
  31 **/
  32 EFI_PEI_SERVICES **
  33 EFIAPI
  34 GetPeiServicesTablePointer (
  35   VOID
  36   )
  37 {
  38   EFI_PEI_SERVICES  **PeiServices;
  39
  40   PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr1 ();
  41   ASSERT (PeiServices != NULL);
  42   return PeiServices;
  43 }
  44
  45 /**
  46   The constructor function caches the pointer to PEI services.
  47
  48   The constructor function caches the pointer to PEI services.
  49   It will always return EFI_SUCCESS.
  50
  51   @param  FfsHeader   Pointer to FFS header the loaded driver.
  52   @param  PeiServices Pointer to the PEI services.
  53
  54   @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
  55
  56 **/
  57 EFI_STATUS
  58 EFIAPI
  59 PeiServicesTablePointerLibConstructor (
  60   IN EFI_FFS_FILE_HEADER  *FfsHeader,
  61   IN EFI_PEI_SERVICES     **PeiServices
  62   )
  63 {
  64   AsmWriteKr1 ((UINT64)(UINTN)PeiServices);
  65   return EFI_SUCCESS;
  66 }