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## @file
#
# Copyright (c) 2010, 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.
#
##
#-----------------------------------------
#VOID
#AsmTransferControl (
# IN UINT32 S3WakingVector,
# IN UINT32 AcpiLowMemoryBase
# );
#-----------------------------------------
ASM_GLOBAL ASM_PFX(AsmTransferControl)
ASM_PFX(AsmTransferControl):
# S3WakingVector :DWORD
# AcpiLowMemoryBase :DWORD
pushl %ebp
movl %esp,%ebp
leal LABLE, %eax
pushl $0x28 # CS
pushl %eax
movl 8(%ebp),%ecx
shrdl $20,%ecx,%ebx
andl $0xf,%ecx
movw %cx,%bx
movl %ebx, jmp_addr
lret
LABLE:
.byte 0xb8,0x30,0 # mov ax, 30h as selector
movw %ax,%ds
movw %ax,%es
movw %ax,%fs
movw %ax,%gs
movw %ax,%ss
movl %cr0, %eax # Get control register 0
.byte 0x66
.byte 0x83,0xe0,0xfe # and eax, 0fffffffeh ; Clear PE bit (bit #0)
.byte 0xf,0x22,0xc0 # mov cr0, eax ; Activate real mode
.byte 0xea # jmp far @jmp_addr
jmp_addr:
.long 0
ASM_GLOBAL ASM_PFX(AsmTransferControl32)
ASM_PFX(AsmTransferControl32):
jmp ASM_PFX(AsmTransferControl)
# dummy
ASM_GLOBAL ASM_PFX(AsmTransferControl16)
ASM_PFX(AsmTransferControl16):
ASM_GLOBAL ASM_PFX(AsmFixAddress16)
ASM_PFX(AsmFixAddress16):
.long 0
ASM_GLOBAL ASM_PFX(AsmJmpAddr32)
ASM_PFX(AsmJmpAddr32):
.long 0
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