1 /* $NetBSD: autoconf.c,v 1.26 2012/10/27 17:17:53 chs 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 1.26 2012/10/27 17:17:53 chs 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
54 void makebootdev(const char *);
55
56 static char __booted_device_name[16];
57 static 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 */
66 void
cpu_configure(void)67 cpu_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
82 void
cpu_rootconf(void)83 cpu_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
94 void
makebootdev(const char * cp)95 makebootdev(const char *cp)
96 {
97
98 strncpy(__booted_device_name, cp, 16);
99 }
100
101 static void
get_device(const char * name)102 get_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