1/*	$NetBSD: autoconf.c,v 1.25 2012/07/29 18:05:43 mlelstv Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department and Ralph Campbell.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah Hdr: autoconf.c 1.31 91/01/21
37 *
38 *	@(#)autoconf.c	8.1 (Berkeley) 6/10/93
39 */
40
41#include <sys/cdefs.h>
42__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.25 2012/07/29 18:05:43 mlelstv Exp $");
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/conf.h>
47#include <sys/device.h>
48
49#include <machine/disklabel.h>
50
51#include <machine/sysconf.h>
52#include <machine/config_hook.h>
53
54void makebootdev(const char *);
55
56static char __booted_device_name[16];
57static void get_device(const char *);
58
59/*
60 * Setup the system to run on the current machine.
61 *
62 * cpu_configure() is called at boot time.  Available
63 * devices are determined (from possibilities mentioned in ioconf.c),
64 * and the drivers are initialized.
65 */
66void
67cpu_configure(void)
68{
69
70	/* Kick off autoconfiguration. */
71	(void)splhigh();
72
73	config_hook_init();
74
75	if (config_rootfound("mainbus", NULL) == NULL)
76		panic("no mainbus found");
77
78	/* Configuration is finished, turn on interrupts. */
79	spl0();		/* enable all source forcing SOFT_INTs cleared */
80}
81
82void
83cpu_rootconf(void)
84{
85
86	get_device(__booted_device_name);
87
88	printf("boot device: %s\n",
89	    booted_device ? device_xname(booted_device) : "<unknown>");
90
91	rootconf();
92}
93
94void
95makebootdev(const char *cp)
96{
97
98	strncpy(__booted_device_name, cp, 16);
99}
100
101static void
102get_device(const char *name)
103{
104	int unit, part;
105	char devname[16];
106	const char *cp;
107	device_t dv;
108
109	if (strncmp(name, "/dev/", 5) == 0)
110		name += 5;
111
112	if (devsw_name2blk(name, devname, sizeof(devname)) == -1)
113		return;
114
115	name += strlen(devname);
116	unit = part = 0;
117
118	cp = name;
119	while (*cp >= '0' && *cp <= '9')
120		unit = (unit * 10) + (*cp++ - '0');
121	if (cp == name)
122		return;
123
124	if (*cp >= 'a' && *cp <= ('a' + MAXPARTITIONS))
125		part = *cp - 'a';
126	else if (*cp != '\0' && *cp != ' ')
127		return;
128	if ((dv = device_find_by_driver_unit(devname, unit)) != NULL) {
129		booted_device = dv;
130		booted_partition = part;
131	}
132}
133