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IntelFsp2WrapperPkg: BaseFspWrapperApiLib support for X64

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REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3893
Add Execute64BitCode to execute 64bit code from long mode directly
in PEI 64bit.

Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Signed-off-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
This commit is contained in:
Ted Kuo
2022-04-15 01:37:42 -07:00
committed by mergify[bot]
parent 4a6ed7e46a
commit 86a2f3c439
3 changed files with 104 additions and 10 deletions
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47
IntelFsp2WrapperPkg/Library/BaseFspWrapperApiLib/X64/DispatchExecute.c
View File

@ -1,9 +1,9 @@
/** @file
Execute 32-bit code in Long Mode.
Execute 64-bit code in Long Mode.
Provide a thunk function to transition from long mode to compatibility mode to execute 32-bit code and then transit
back to long mode.
Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2014 - 2022, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -12,6 +12,21 @@
#include <Library/BaseLib.h>
#include <FspEas.h>
/**
FSP API functions.
@param[in] Param1 The first parameter to pass to 64bit code.
@param[in] Param2 The second parameter to pass to 64bit code.
@return EFI_STATUS.
**/
typedef
EFI_STATUS
(EFIAPI *FSP_FUNCTION)(
IN VOID *Param1,
IN VOID *Param2
);
#pragma pack(1)
typedef union {
struct {
@ -80,7 +95,7 @@ AsmExecute32BitCode (
);
/**
Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
Wrapper for a thunk to transition from long mode to compatibility mode to execute 32-bit code and then transit back to
long mode.
@param[in] Function The 32bit code entry to be executed.
@ -110,3 +125,29 @@ Execute32BitCode (
return Status;
}
/**
Wrapper to execute 64-bit code directly from long mode.
@param[in] Function The 64bit code entry to be executed.
@param[in] Param1 The first parameter to pass to 64bit code.
@param[in] Param2 The second parameter to pass to 64bit code.
@return EFI_STATUS.
**/
EFI_STATUS
Execute64BitCode (
IN UINT64 Function,
IN UINT64 Param1,
IN UINT64 Param2
)
{
FSP_FUNCTION EntryFunc;
EFI_STATUS Status;
EntryFunc = (FSP_FUNCTION)(UINTN)(Function);
Status = EntryFunc ((VOID *)(UINTN)Param1, (VOID *)(UINTN)Param2);
return Status;
}