Add IntelFspPkg to support create FSP bin based on EDKII.
Contributed-under: TianoCore Contribution Agreement 1.0 Signed off by: Ravi Rangarajan <ravi.p.rangarajan@intel.com> Reviewed by: Maurice Ma <maurice.ma@intel.com> Reviewed by: Jiewen Yao <jiewen.yao@intel.com> Reviewed by: Giri Mudusuru <giri.p.mudusuru@intel.com> Reviewed by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15705 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
65
IntelFspPkg/Library/BaseFspSwitchStackLib/Ia32/Stack.asm
Normal file
65
IntelFspPkg/Library/BaseFspSwitchStackLib/Ia32/Stack.asm
Normal file
@@ -0,0 +1,65 @@
|
||||
;------------------------------------------------------------------------------
|
||||
;
|
||||
; Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
|
||||
; This program and the accompanying materials
|
||||
; are licensed and made available under the terms and conditions of the BSD License
|
||||
; which accompanies this distribution. The full text of the license may be found at
|
||||
; http://opensource.org/licenses/bsd-license.php.
|
||||
;
|
||||
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
||||
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
||||
;
|
||||
; Abstract:
|
||||
;
|
||||
; Switch the stack from temporary memory to permenent memory.
|
||||
;
|
||||
;------------------------------------------------------------------------------
|
||||
|
||||
.586p
|
||||
.model flat,C
|
||||
.code
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; UINT32
|
||||
; EFIAPI
|
||||
; Pei2LoaderSwitchStack (
|
||||
; VOID
|
||||
; )
|
||||
;------------------------------------------------------------------------------
|
||||
EXTERNDEF C MeasurePoint:PROC
|
||||
Pei2LoaderSwitchStack PROC C PUBLIC
|
||||
jmp Loader2PeiSwitchStack
|
||||
Pei2LoaderSwitchStack ENDP
|
||||
|
||||
;------------------------------------------------------------------------------
|
||||
; UINT32
|
||||
; EFIAPI
|
||||
; Loader2PeiSwitchStack (
|
||||
; VOID
|
||||
; )
|
||||
;------------------------------------------------------------------------------
|
||||
EXTERNDEF C SwapStack:PROC
|
||||
Loader2PeiSwitchStack PROC C PUBLIC
|
||||
; Save current contexts
|
||||
push offset exit
|
||||
pushfd
|
||||
cli
|
||||
pushad
|
||||
sub esp, 8
|
||||
sidt fword ptr [esp]
|
||||
|
||||
; Load new stack
|
||||
push esp
|
||||
call SwapStack
|
||||
mov esp, eax
|
||||
|
||||
; Restore previous contexts
|
||||
lidt fword ptr [esp]
|
||||
add esp, 8
|
||||
popad
|
||||
popfd
|
||||
exit:
|
||||
ret
|
||||
Loader2PeiSwitchStack ENDP
|
||||
|
||||
END
|
Reference in New Issue
Block a user