/* $OpenBSD: apmcall.S,v 1.5 2003/06/03 20:10:31 mickey Exp $ */
/*
* Copyright (c) 2000,2001 Michael Shalayeff
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#ifndef APM_DISABLE_INTERRUPTS
#define APM_DISABLE_INTERRUPTS 1
#endif /* APM_DISABLE_INTERRUPTS */
.data
.globl _C_LABEL(apm_ep)
.globl _C_LABEL(apm_cli)
_C_LABEL(apm_cli):
.long APM_DISABLE_INTERRUPTS
/*
* int apmcall(u_int f, int dev, struct apmregs *r)
*
*/
.text
ENTRY(apmcall)
pushl %ebp
movl %esp, %ebp
pushl %ebx
pushl %esi
pushl %edi
movl 16(%ebp), %ebx
movl 8(%ebx), %ecx
movl 12(%ebx), %edx
movl 12(%ebp), %ebx
pushfl
cmp $0, _C_LABEL(apm_cli)
je 1f
cli
1:
#if defined(DEBUG) || defined(DIAGNOSTIC)
pushl %ds
pushl %es
pushl %fs
pushl %gs
xorl %eax, %eax
movl %eax, %ds
movl %eax, %es
movl %eax, %fs
movl %eax, %gs
#endif
movl 8(%ebp), %eax
clc
lcall %cs:*(_C_LABEL(apm_ep))
pushl %eax
setc %al
movzbl %al, %esi
popl %eax
#if defined(DEBUG) || defined(DIAGNOSTIC)
popl %gs
popl %fs
popl %es
popl %ds
#endif
popfl
movl 16(%ebp), %edi
movl %eax, 0(%edi)
movl %ebx, 4(%edi)
movl %ecx, 8(%edi)
movl %edx, 12(%edi)
testl $0xff00, %eax
jnz 1f
xorl %esi, %esi
1:
movl %esi, %eax
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
.end