i386_module.c revision 119482 
1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/boot/i386/libi386/i386_module.c 119482 2003-08-25 23:28:32Z obrien $");
29
30/*
31 * i386-specific module functionality.
32 *
33 */
34
35#include <stand.h>
36#include <string.h>
37
38#include "bootstrap.h"
39#include "libi386.h"
40
41/*
42 * Use voodoo to load modules required by current hardware.
43 */
44int
45i386_autoload(void)
46{
47    int		error;
48    int		disabled;
49    char	*rv;
50
51    /* XXX use PnP to locate stuff here */
52
53    /* autoload ACPI support */
54    /* XXX should be in 4th keyed off acpi_load */
55    disabled = 0;
56    rv = getenv("hint.acpi.0.disabled");
57    if (rv != NULL && strncmp(rv, "0", 1) != 0) {
58	disabled = 1;
59    }
60
61    if (getenv("acpi_load") && (!disabled)) {
62	error = mod_load("acpi", NULL, 0, NULL);
63	if (error != 0)
64	    printf("ACPI autoload failed - %s\n", strerror(error));
65    }
66
67    return(0);
68}
69