1 /* $NetBSD: autoconf.c,v 1.39 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
51 #include <sys/cdefs.h>
52 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.39 2017/06/22 16:46:53 flxd Exp $");
53
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/buf.h>
57 #include <sys/conf.h>
58 #include <sys/reboot.h>
59 #include <sys/device.h>
60 #include <sys/intr.h>
61 #include <sys/cpu.h>
62
63 #include <dev/scsipi/scsi_all.h>
64 #include <dev/scsipi/scsipi_all.h>
65 #include <dev/scsipi/scsiconf.h>
66
67 #include <machine/adrsmap.h>
68 #include <machine/romcall.h>
69
70 #include <newsmips/newsmips/machid.h>
71
72 #include "scsibus.h"
73
74 /*
75 * The following several variables are related to
76 * the configuration process, and are used in initializing
77 * the machine.
78 */
79 int cpuspeed = 10; /* approx # instr per usec. */
80
81 static void findroot(void);
82
83 /*
84 * Determine mass storage and memory configuration for a machine.
85 * Print CPU type, and then iterate over an array of devices
86 * found on the baseboard or in TURBOchannel option slots.
87 * Once devices are configured, enable interrupts, and probe
88 * for attached scsi devices.
89 */
90 void
cpu_configure(void)91 cpu_configure(void)
92 {
93
94 /*
95 * Kick off autoconfiguration
96 */
97 (*disable_intr)();
98 (void)splhigh();
99
100 if (config_rootfound("mainbus", NULL) == NULL)
101 panic("no mainbus found");
102
103 /* Enable hardware interrupt registers. */
104 (*enable_intr)();
105
106 /* Configuration is finished, turn on interrupts. */
107 spl0(); /* enable all source forcing SOFT_INTs cleared */
108 }
109
110 void
cpu_rootconf(void)111 cpu_rootconf(void)
112 {
113 findroot();
114
115 printf("boot device: %s\n",
116 booted_device ? device_xname(booted_device) : "<unknown>");
117
118 rootconf();
119 }
120
121 u_long bootdev = 0; /* should be dev_t, but not until 32 bits */
122
123 /*
124 * Attempt to find the device from which we were booted.
125 */
126 static void
findroot(void)127 findroot(void)
128 {
129 int ctlr, part, type;
130 device_t dv;
131
132 if (BOOTDEV_MAG(bootdev) != 5) /* NEWS-OS's B_DEVMAGIC */
133 return;
134
135 ctlr = BOOTDEV_CTLR(bootdev); /* SCSI ID */
136 part = BOOTDEV_PART(bootdev); /* LUN */
137 type = BOOTDEV_TYPE(bootdev);
138
139 if (type != BOOTDEV_SD)
140 return;
141
142 /*
143 * XXX assumes only one controller exists.
144 */
145 if ((dv = device_find_by_xname("scsibus0")) != NULL) {
146 #if NSCSIBUS > 0
147 struct scsibus_softc *sdv = device_private(dv);
148 struct scsipi_periph *periph;
149
150 periph = scsipi_lookup_periph(sdv->sc_channel, ctlr, 0);
151 if (periph != NULL) {
152 booted_device = periph->periph_dev;
153 booted_partition = part;
154 }
155 #endif /* NSCSIBUS > 0 */
156 }
157 }
158