autoconf.c revision 1.9 
1/*	$NetBSD: autoconf.c,v 1.9 2006/02/26 05:24:52 thorpej Exp $	*/
2
3/*
4 * Copyright 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed for the NetBSD Project by
20 *      Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.9 2006/02/26 05:24:52 thorpej Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/buf.h>
44#include <sys/conf.h>
45#include <sys/device.h>
46
47#include <machine/cpu.h>
48
49static void	findroot(void);
50
51void
52cpu_configure()
53{
54
55	intr_init();
56
57	/* Kick off autoconfiguration. */
58	(void)splhigh();
59	if (config_rootfound("mainbus", NULL) == NULL)
60		panic("no mainbus found");
61	(void)spl0();
62}
63
64void
65cpu_rootconf()
66{
67	findroot();
68
69	printf("boot device: %s\n",
70		booted_device ? booted_device->dv_xname : "<unknown>");
71
72	setroot(booted_device, booted_partition);
73}
74
75extern char	bootstring[];
76extern int	netboot;
77
78static void
79findroot(void)
80{
81	struct device *dv;
82
83	if (booted_device)
84		return;
85
86	if ((booted_device == NULL) && netboot == 0)
87		for (dv = alldevs.tqh_first; dv != NULL;
88		     dv = dv->dv_list.tqe_next)
89			if (device_class(dv) == DV_DISK &&
90			    device_is_a(dv, "wd"))
91				    booted_device = dv;
92
93	/*
94	 * XXX Match up MBR boot specification with BSD disklabel for root?
95	 */
96	booted_partition = 0;
97
98	return;
99}
100
101void
102device_register(dev, aux)
103	struct device *dev;
104	void *aux;
105{
106	if ((booted_device == NULL) && (netboot == 1))
107		if (device_class(dev) == DV_IFNET)
108			booted_device = dev;
109}
110