autoconf.c revision 1.4 
1/*	$NetBSD: autoconf.c,v 1.4 2003/07/15 01:37:33 lukem 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 1.4 2003/07/15 01:37:33 lukem 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
49struct device *booted_device;
50int booted_partition;
51
52static void	findroot(void);
53
54void
55cpu_configure()
56{
57
58	intr_init();
59
60	/* Kick off autoconfiguration. */
61	(void)splhigh();
62	if (config_rootfound("mainbus", "mainbus") == NULL)
63		panic("no mainbus found");
64	(void)spl0();
65}
66
67void
68cpu_rootconf()
69{
70	findroot();
71
72	printf("boot device: %s\n",
73		booted_device ? booted_device->dv_xname : "<unknown>");
74
75	setroot(booted_device, booted_partition);
76}
77
78extern char	bootstring[];
79extern int	netboot;
80
81static void
82findroot(void)
83{
84	struct device *dv;
85
86	if (booted_device)
87		return;
88
89	if ((booted_device == NULL) && netboot == 0)
90		for (dv = alldevs.tqh_first; dv != NULL;
91		     dv = dv->dv_list.tqe_next)
92			if (dv->dv_class == DV_DISK &&
93			    !strcmp(dv->dv_cfdata->cf_name, "wd"))
94				    booted_device = dv;
95
96	/*
97	 * XXX Match up MBR boot specification with BSD disklabel for root?
98	 */
99	booted_partition = 0;
100
101	return;
102}
103
104void
105device_register(dev, aux)
106	struct device *dev;
107	void *aux;
108{
109	if ((booted_device == NULL) && (netboot == 1))
110		if (dev->dv_class == DV_IFNET)
111			booted_device = dev;
112}
113