1 /** @file 2 Execute 32-bit code in Long Mode 3 Provide a thunk function to transition from long mode to compatibility mode to execute 32-bit code and then transit 4 back to long mode. 5 6 Copyright (c) 2010, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 #include "ScriptSave.h" 17 /** 18 Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to 19 long mode. 20 21 @param Function The 32bit code entry to be executed. 22 @param Param1 The first parameter to pass to 32bit code 23 @param Param2 The second parameter to pass to 32bit code 24 @retval EFI_SUCCESS Execute 32bit code successfully. 25 @retval other Something wrong when execute the 32bit code 26 27 **/ 28 EFI_STATUS Execute32BitCode(IN UINT64 Function,IN UINT64 Param1,IN UINT64 Param2)29Execute32BitCode ( 30 IN UINT64 Function, 31 IN UINT64 Param1, 32 IN UINT64 Param2 33 ) 34 { 35 DISPATCH_ENTRYPOINT_FUNC EntryFunc; 36 EFI_STATUS Status; 37 38 EntryFunc = (DISPATCH_ENTRYPOINT_FUNC) (UINTN) (Function); 39 Status = EntryFunc ((VOID *)(UINTN)Param1, (VOID *)(UINTN)Param2); 40 41 return Status; 42 } 43 44