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;; @file
; This is the assembly code for transferring to control to OS S3 waking vector
; for IA32 platform
;
; Copyright (c) 2006, 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.
;
;;
.586P
.model flat,C
.code
EXTERNDEF AsmFixAddress16:DWORD
EXTERNDEF AsmJmpAddr32:DWORD
;-----------------------------------------
;VOID
;AsmTransferControl (
; IN UINT32 S3WakingVector,
; IN UINT32 AcpiLowMemoryBase
; );
;-----------------------------------------
AsmTransferControl PROC
; S3WakingVector :DWORD
; AcpiLowMemoryBase :DWORD
push ebp
mov ebp, esp
lea eax, @F
push 28h ; CS
push eax
mov ecx, [ebp + 8]
shrd ebx, ecx, 20
and ecx, 0fh
mov bx, cx
mov @jmp_addr, ebx
retf
@@:
DB 0b8h, 30h, 0 ; mov ax, 30h as selector
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
mov eax, cr0 ; Get control register 0
DB 66h
DB 83h, 0e0h, 0feh ; and eax, 0fffffffeh ; Clear PE bit (bit #0)
DB 0fh, 22h, 0c0h ; mov cr0, eax ; Activate real mode
DB 0eah ; jmp far @jmp_addr
@jmp_addr DD ?
AsmTransferControl ENDP
AsmTransferControl32 PROC
jmp AsmTransferControl
AsmTransferControl32 ENDP
; dummy
AsmTransferControl16 PROC
AsmFixAddress16 DD ?
AsmJmpAddr32 DD ?
AsmTransferControl16 ENDP
END
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