1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 1996
5 * 	Perry E. Metzger.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgements:
17 *	This product includes software developed for the NetBSD Project
18 *	by Perry E. Metzger.
19 * 4. The names of the authors may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35#include <machine/asm.h>
36
37	.text
38
39ENTRY(biosvideomode)
40	pushl	%ebp
41	movl	%esp,%ebp
42	pushl	%ebx
43	push	%esi
44	push	%edi
45
46	call	_C_LABEL(prot_to_real)
47	.code16
48
49	movb	$0, %ah
50	movb	$2, %al
51	int	$0x10
52	# zero-extend 16-bit result to 32 bits.
53	movl	$0, %ebx
54	movw	%ax,%bx
55
56	calll	_C_LABEL(real_to_prot)
57	.code32
58
59	movl	%ebx, %eax
60
61	pop	%edi
62	pop	%esi
63	popl	%ebx
64	popl	%ebp
65	ret
66