1 /* $NetBSD: autoconf.c,v 1.28 2017/06/22 16:46:53 flxd 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 /*
42 * Setup the system to run on the current machine.
43 *
44 * Configure() is called at boot time. Available
45 * devices are determined (from possibilities mentioned in ioconf.c),
46 * and the drivers are initialized.
47 */
48
49 #define __INTR_PRIVATE
50 #include <sys/cdefs.h>
51 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.28 2017/06/22 16:46:53 flxd Exp $");
52
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/buf.h>
56 #include <sys/conf.h>
57 #include <sys/reboot.h>
58 #include <sys/device.h>
59
60 #include <dev/scsipi/scsi_all.h>
61 #include <dev/scsipi/scsipi_all.h>
62 #include <dev/scsipi/scsiconf.h>
63
64 #include <machine/cpu.h>
65 #include <machine/mainboard.h>
66 #include <machine/autoconf.h>
67
68 /*
69 * The following several variables are related to
70 * the configuration process, and are used in initializing
71 * the machine.
72 */
73 int cpuspeed = 25; /* approx # instr per usec. */
74
75 extern int initcpu(void); /*XXX*/
76
77 void findroot(device_t *, int *);
78
79 struct mipsco_intrhand intrtab[MAX_INTR_COOKIES];
80
81 /*
82 * Determine mass storage and memory configuration for a machine.
83 * Print CPU type, and then iterate over an array of devices
84 * found on the baseboard or in TURBOchannel option slots.
85 * Once devices are configured, enable interrupts, and probe
86 * for attached scsi devices.
87 */
88 void
cpu_configure(void)89 cpu_configure(void)
90 {
91
92 /*
93 * Kick off autoconfiguration
94 */
95 (void) splhigh();
96 if (config_rootfound("mainbus", NULL) == NULL)
97 panic("no mainbus found");
98 initcpu();
99 }
100
101 void
cpu_rootconf(void)102 cpu_rootconf(void)
103 {
104 findroot(&booted_device, &booted_partition);
105
106 printf("boot device: %s\n",
107 booted_device ? device_xname(booted_device) : "<unknown>");
108 rootconf();
109 }
110
111 dev_t bootdev = 0;
112 char boot_class;
113 int boot_id, boot_lun, boot_part;
114
115 /*
116 * Attempt to find the device from which we were booted.
117 */
118 void
findroot(device_t * devpp,int * partp)119 findroot(device_t *devpp, int *partp)
120 {
121 device_t dv;
122 deviter_t di;
123
124 for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST);
125 dv != NULL;
126 dv = deviter_next(&di)) {
127 if (device_class(dv) == boot_class &&
128 /* XXX device_unit() abuse */
129 device_unit(dv) == boot_id)
130 break;
131 }
132 deviter_release(&di);
133 if (dv != NULL) {
134 *devpp = dv;
135 *partp = boot_part;
136 return;
137 }
138
139 /*
140 * Default to "not found".
141 */
142 *devpp = NULL;
143 *partp = 0;
144 return;
145 }
146
147 void
makebootdev(char * cp)148 makebootdev(char *cp)
149 {
150 boot_class = -1;
151 boot_id = boot_lun = boot_part = 0;
152
153 if (strlen(cp) < 6)
154 return;
155 if (strncmp(cp, "dk", 2) == 0 && cp[4] == '(') { /* Disk */
156 cp += 5;
157 if (*cp >= '0' && *cp <= '9')
158 boot_lun = *cp++ - '0';
159 if (*cp == ',')
160 cp += 1;
161 if (*cp >= '0' && *cp <= '9')
162 boot_id = *cp++ - '0';
163 if (*cp == ',')
164 cp += 1;
165 if (*cp >= '0' && *cp <= '7')
166 boot_part = *cp - '0';
167 boot_class = DV_DISK;
168 return;
169 }
170 }
171