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IntelFsp2Pkg: Add FunctionParametePtr to FspGlobalData. 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2726

When FSP switching stack and calling bootloader functions,
the function parameter in stack may not be accessible easily.
We can store the function parameter pointer to FspGlobalData
and retrieve it after stack switched.

Also need to add Loader2PeiSwitchStack () to header file
as public function for platform FSP code to consume.

Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
This commit is contained in:
Chasel Chiu 2020-05-20 11:23:13 +08:00 committed by mergify[bot]
parent bc5012b8fb
commit 3f89db8690
2 changed files with 27 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
IntelFsp2Pkg/Include/FspGlobalData.h
View File

@ -52,12 +52,20 @@ typedef struct {
VOID *MemoryInitUpdPtr;
VOID *SiliconInitUpdPtr;
UINT8 ApiIdx;
UINT8 FspMode; // 0: FSP in API mode; 1: FSP in DISPATCH mode
///
/// 0: FSP in API mode; 1: FSP in DISPATCH mode
///
UINT8 FspMode;
UINT8 OnSeparateStack;
UINT8 Reserved3;
UINT32 NumberOfPhases;
UINT32 PhasesExecuted;
UINT8 Reserved4[20];
///
/// To store function parameters pointer
/// so it can be retrieved after stack switched.
///
VOID *FunctionParameterPtr;
UINT8 Reserved4[16];
UINT32 PerfSig;
UINT16 PerfLen;
UINT16 Reserved5;

18
IntelFsp2Pkg/Include/Library/FspSwitchStackLib.h
View File

@ -1,6 +1,6 @@
/** @file
Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2014 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -36,4 +36,20 @@ Pei2LoaderSwitchStack (
VOID
);
/**
This function is equivalent to Pei2LoaderSwitchStack () but just indicates
the stack after switched is FSP stack.
@return ReturnKey After switching to the saved stack,
this value will be saved in eax before returning.
**/
UINT32
EFIAPI
Loader2PeiSwitchStack (
VOID
);
#endif