;; @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