1/*-
2 * Copyright (c) 1997 Jonathan Lemon
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29/*
30 * Functions for calling x86 BIOS functions from the BSD kernel
31 */
32
33#include <machine/asmacros.h>
34
35	.text
36
37/*
38 * bios32_apm98(regs, offset, segment)
39 *	struct bios_regs *regs;
40 *	u_int offset;
41 * 	u_short segment;
42 */
43ENTRY(bios32_apm98)
44	pushl	%ebp
45	movl	16(%esp),%ebp
46	mov	%bp,bioscall_vector+4
47	movl	12(%esp),%ebp
48	movl	%ebp,bioscall_vector
49	movl	8(%esp),%ebp
50	pushl	%ebx
51	pushl	%esi
52	pushl	%edi
53	movl	0(%ebp),%eax
54	movl	4(%ebp),%ebx
55	movl	8(%ebp),%ecx
56	movl	12(%ebp),%edx
57	movl	16(%ebp),%esi
58	movl	20(%ebp),%edi
59	pushl	%ebp
60	pushfl
61	cli
62	lcall	*bioscall_vector
63	movl	%eax,%edi
64	movl	%edx,%esi
65	lahf
66	movl	apm_necsmm_addr,%edx
67	andl	%edx,%edx
68	jz	9f
69	inb	%dx,%al
70	andl	apm_necsmm_mask,%eax
71	outb	%al,%dx
729:
73	sti
74	popl	%ebp
75	movl	%edi,0(%ebp)
76	movl	%ebx,4(%ebp)
77	movl	%ecx,8(%ebp)
78	movl	%esi,12(%ebp)
79	movl	$0,16(%ebp)	/* esi is cannot get */
80	movl	$0,20(%ebp)	/* edi is cannot get */
81	movl	%edi,%eax
82	andl	$0x100,%eax
83	popl	%edi
84	popl	%esi
85	popl	%ebx
86	popl	%ebp
87	ret
88