1180767Simp/*-
2180767Simp * Copyright (c) 1997 Jonathan Lemon
3180767Simp * All rights reserved.
4180767Simp *
5180767Simp * Redistribution and use in source and binary forms, with or without
6180767Simp * modification, are permitted provided that the following conditions
7180767Simp * are met:
8238405Sjkim * 1. Redistributions of source code must retain the above copyright
9238405Sjkim *    notice, this list of conditions and the following disclaimer.
10238405Sjkim * 2. Redistributions in binary form must reproduce the above copyright
11180767Simp *    notice, this list of conditions and the following disclaimer in the
12238405Sjkim *    documentation and/or other materials provided with the distribution.
13238405Sjkim *
14194207Ssimon * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15194207Ssimon * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16194207Ssimon * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17194207Ssimon * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18180767Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19180767Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20180767Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21238405Sjkim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22238405Sjkim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23238405Sjkim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24238405Sjkim * SUCH DAMAGE.
25238405Sjkim *
26238405Sjkim * $FreeBSD: releng/11.0/sys/pc98/apm/apm_bioscall.S 145326 2005-04-20 12:28:20Z nyan $
27238405Sjkim */
28238405Sjkim
29238405Sjkim/*
30180767Simp * Functions for calling x86 BIOS functions from the BSD kernel
31180767Simp */
32238405Sjkim
33180767Simp#include <machine/asmacros.h>
34180767Simp
35180767Simp	.text
36238405Sjkim
37238405Sjkim/*
38238405Sjkim * bios32_apm98(regs, offset, segment)
39180767Simp *	struct bios_regs *regs;
40180767Simp *	u_int offset;
41180767Simp * 	u_short segment;
42180767Simp */
43180767SimpENTRY(bios32_apm98)
44180767Simp	pushl	%ebp
45180767Simp	movl	16(%esp),%ebp
46180767Simp	mov	%bp,bioscall_vector+4
47180767Simp	movl	12(%esp),%ebp
48238405Sjkim	movl	%ebp,bioscall_vector
49238405Sjkim	movl	8(%esp),%ebp
50238405Sjkim	pushl	%ebx
51180767Simp	pushl	%esi
52180767Simp	pushl	%edi
53180767Simp	movl	0(%ebp),%eax
54238405Sjkim	movl	4(%ebp),%ebx
55238405Sjkim	movl	8(%ebp),%ecx
56238405Sjkim	movl	12(%ebp),%edx
57180767Simp	movl	16(%ebp),%esi
58180767Simp	movl	20(%ebp),%edi
59180767Simp	pushl	%ebp
60238405Sjkim	pushfl
61238405Sjkim	cli
62180767Simp	lcall	*bioscall_vector
63238405Sjkim	movl	%eax,%edi
64238405Sjkim	movl	%edx,%esi
65180767Simp	lahf
66238405Sjkim	movl	apm_necsmm_addr,%edx
67238405Sjkim	andl	%edx,%edx
68238405Sjkim	jz	9f
69180767Simp	inb	%dx,%al
70180767Simp	andl	apm_necsmm_mask,%eax
71180767Simp	outb	%al,%dx
72180767Simp9:
73180767Simp	sti
74180767Simp	popl	%ebp
75180767Simp	movl	%edi,0(%ebp)
76180767Simp	movl	%ebx,4(%ebp)
77180767Simp	movl	%ecx,8(%ebp)
78180767Simp	movl	%esi,12(%ebp)
79180767Simp	movl	$0,16(%ebp)	/* esi is cannot get */
80180767Simp	movl	$0,20(%ebp)	/* edi is cannot get */
81180767Simp	movl	%edi,%eax
82180767Simp	andl	$0x100,%eax
83180767Simp	popl	%edi
84180767Simp	popl	%esi
85180767Simp	popl	%ebx
86180767Simp	popl	%ebp
87180767Simp	ret
88180767Simp