IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/IA32/DispatchExecute.c

   1 /** @file
   2   Execute 32-bit code in Protected Mode.
   3
   4   Copyright (c) 2014 - 2022, Intel Corporation. All rights reserved.<BR>
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #include <Uefi.h>
  10 #include <FspEas.h>
  11
  12 /**
  13   FSP API functions.
  14
  15   @param[in] Param1       The first parameter to pass to 32bit code.
  16   @param[in] Param2       The second parameter to pass to 32bit code.
  17
  18   @return EFI_STATUS.
  19 **/
  20 typedef
  21 EFI_STATUS
  22 (EFIAPI *FSP_FUNCTION)(
  23   IN VOID *Param1,
  24   IN VOID *Param2
  25   );
  26
  27 /**
  28   Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
  29   long mode.
  30
  31   @param[in] Function     The 32bit code entry to be executed.
  32   @param[in] Param1       The first parameter to pass to 32bit code.
  33   @param[in] Param2       The second parameter to pass to 32bit code.
  34
  35   @return EFI_STATUS.
  36 **/
  37 EFI_STATUS
  38 Execute32BitCode (
  39   IN UINT64  Function,
  40   IN UINT64  Param1,
  41   IN UINT64  Param2
  42   )
  43 {
  44   FSP_FUNCTION  EntryFunc;
  45   EFI_STATUS    Status;
  46
  47   EntryFunc = (FSP_FUNCTION)(UINTN)(Function);
  48   Status    = EntryFunc ((VOID *)(UINTN)Param1, (VOID *)(UINTN)Param2);
  49
  50   return Status;
  51 }
  52
  53 /**
  54   Wrapper for a thunk to transition from compatibility mode to long mode to execute 64-bit code and then transit back to
  55   compatibility mode.
  56
  57   @param[in] Function     The 64bit code entry to be executed.
  58   @param[in] Param1       The first parameter to pass to 64bit code.
  59   @param[in] Param2       The second parameter to pass to 64bit code.
  60
  61   @return EFI_STATUS.
  62 **/
  63 EFI_STATUS
  64 Execute64BitCode (
  65   IN UINT64  Function,
  66   IN UINT64  Param1,
  67   IN UINT64  Param2
  68   )
  69 {
  70   return EFI_UNSUPPORTED;
  71 }