1 /* $NetBSD: autoconf.c,v 1.7 2012/07/29 18:05:42 mlelstv Exp $ */
2
3 /*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91
35 */
36
37 /*
38 * Setup the system to run on the current machine.
39 *
40 * Configure() is called at boot time and initializes the vba
41 * device tables and the memory controller monitoring. Available
42 * devices are determined (from possibilities mentioned in ioconf.c),
43 * and the drivers are initialized.
44 */
45
46 #include <sys/cdefs.h>
47 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.7 2012/07/29 18:05:42 mlelstv Exp $");
48
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/buf.h>
52 #include <sys/disklabel.h>
53 #include <sys/conf.h>
54 #include <sys/reboot.h>
55 #include <sys/device.h>
56
57 #include <powerpc/pte.h>
58
59 void findroot(void);
60 void disable_intr(void);
61 void enable_intr(void);
62
63 /*
64 * Determine i/o configuration for a machine.
65 */
66 void
cpu_configure(void)67 cpu_configure(void)
68 {
69
70 if (config_rootfound("mainbus", NULL) == NULL)
71 panic("configure: mainbus not configured");
72
73 genppc_cpu_configure();
74 }
75
76 void
cpu_rootconf(void)77 cpu_rootconf(void)
78 {
79 findroot();
80
81 printf("boot device: %s\n",
82 booted_device ? device_xname(booted_device) : "<unknown>");
83
84 rootconf();
85 }
86
87 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
88
89 /* XXX remove? */
90 /*
91 * Attempt to find the device from which we were booted.
92 * If we can do so, and not instructed not to do so,
93 * change rootdev to correspond to the load device.
94 */
95 void
findroot(void)96 findroot(void)
97 {
98 int unit, part;
99 device_t dv;
100 const char *name;
101
102 #if 0
103 printf("howto %x bootdev %x ", boothowto, bootdev);
104 #endif
105
106 if ((bootdev & B_MAGICMASK) != (u_long)B_DEVMAGIC)
107 return;
108
109 name = devsw_blk2name((bootdev >> B_TYPESHIFT) & B_TYPEMASK);
110 if (name == NULL)
111 return;
112
113 part = (bootdev >> B_PARTITIONSHIFT) & B_PARTITIONMASK;
114 unit = (bootdev >> B_UNITSHIFT) & B_UNITMASK;
115
116 if ((dv = device_find_by_driver_unit(name, unit)) != NULL) {
117 booted_device = dv;
118 booted_partition = part;
119 }
120 }
121
122 void
device_register(device_t dev,void * aux)123 device_register(device_t dev, void *aux)
124 {
125 /* do nothing */
126 }
127