1 /** @file 2 Execute 32-bit code in Protected Mode. 3 4 Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php. 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #include <Uefi.h> 16 #include <FspApi.h> 17 18 typedef 19 EFI_STATUS 20 (EFIAPI *FSP_FUNCTION) ( 21 IN VOID *Param1 22 ); 23 24 /** 25 Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to 26 long mode. 27 28 @param[in] Function The 32bit code entry to be executed. 29 @param[in] Param1 The first parameter to pass to 32bit code. 30 31 @return EFI_STATUS. 32 **/ 33 EFI_STATUS 34 Execute32BitCode ( 35 IN UINT64 Function, 36 IN UINT64 Param1 37 ) 38 { 39 FSP_FUNCTION EntryFunc; 40 EFI_STATUS Status; 41 42 EntryFunc = (FSP_FUNCTION) (UINTN) (Function); 43 Status = EntryFunc ((VOID *)(UINTN)Param1); 44 45 return Status; 46 } 47 48
