1 /* $NetBSD: autoconf.c,v 1.22 2023/12/20 15:34:45 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1994-1998 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Mark Brinicombe for
19 * the NetBSD project.
20 * 4. The name of the company nor the name of the author may be used to
21 * endorse or promote products derived from this software without specific
22 * prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * 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 * RiscBSD kernel project
37 *
38 * autoconf.c
39 *
40 * Autoconfiguration functions
41 *
42 * Created : 08/10/94
43 */
44
45 #include <sys/cdefs.h>
46 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.22 2023/12/20 15:34:45 thorpej Exp $");
47
48 #include "opt_md.h"
49
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/reboot.h>
53 #include <sys/disklabel.h>
54 #include <sys/device.h>
55 #include <sys/conf.h>
56 #include <sys/intr.h>
57 #include <sys/kernel.h>
58
59 #include <uvm/uvm_extern.h>
60
61 #include <arm/arm32/machdep.h>
62
63 #include <machine/bootconfig.h>
64 #include <machine/irqhandler.h>
65
66 #include "isa.h"
67
68 #ifdef SHARK
69 #include <shark/shark/sequoia.h>
70 extern void ofrootfound(void);
71 extern void ofw_device_register(device_t, void *);
72 extern void startrtclock(void);
73 #endif
74
75 #if defined(OFWGENCFG) || defined(SHARK)
76 /* Temporary for SHARK! */
77 extern void ofw_device_register(device_t, void *);
78 #include <machine/ofw.h>
79 #endif
80
81 extern dev_t dumpdev;
82
83 void isa_intr_init(void);
84
85 #ifndef MEMORY_DISK_IS_ROOT
86 static void get_device(char *name);
87 static void set_root_device(void);
88 #endif
89
90 #ifndef MEMORY_DISK_IS_ROOT
91 /* Decode a device name to a major and minor number */
92
93 static void
get_device(char * name)94 get_device(char *name)
95 {
96 int unit, part;
97 char devname[16], *cp;
98 device_t dv;
99
100 if (strncmp(name, "/dev/", 5) == 0)
101 name += 5;
102
103 if (devsw_name2blk(name, devname, sizeof(devname)) == -1)
104 return;
105
106 name += strlen(devname);
107 unit = part = 0;
108
109 cp = name;
110 while (*cp >= '0' && *cp <= '9')
111 unit = (unit * 10) + (*cp++ - '0');
112 if (cp == name)
113 return;
114
115 if (*cp >= 'a' && *cp <= ('a' + MAXPARTITIONS))
116 part = *cp - 'a';
117 else if (*cp != '\0' && *cp != ' ')
118 return;
119 if ((dv = device_find_by_driver_unit(devname, unit)) != NULL) {
120 booted_device = dv;
121 booted_partition = part;
122 }
123 }
124
125
126 /* Set the rootdev variable from the root specifier in the boot args */
127
128 static void
set_root_device(void)129 set_root_device(void)
130 {
131 char *ptr;
132
133 if (boot_file)
134 get_device(boot_file);
135 if (boot_args &&
136 get_bootconf_option(boot_args, "root", BOOTOPT_TYPE_STRING, &ptr))
137 get_device(ptr);
138 }
139 #endif
140
141 /*
142 * Set up the root device from the boot args
143 */
144 void
cpu_rootconf(void)145 cpu_rootconf(void)
146 {
147 #ifndef MEMORY_DISK_IS_ROOT
148 set_root_device();
149
150 printf("boot device: %s\n",
151 booted_device != NULL ? device_xname(booted_device) : "<unknown>");
152 #endif
153 rootconf();
154 }
155
156
157 /*
158 * void cpu_configure()
159 *
160 * Configure all the root devices
161 * The root devices are expected to configure their own children
162 */
163
164 void
cpu_configure(void)165 cpu_configure(void)
166 {
167 /*
168 * Configure all the roots.
169 * We have to have a mainbus
170 */
171
172 #ifdef SHARK
173 sequoiaInit();
174 startrtclock();
175 #endif
176
177 /*
178 * Since the ICU is not standard on the ARM we don't know
179 * if we have one until we find a bridge.
180 * Since various PCI interrupts could be routed via the ICU
181 * (for PCI devices in the bridge) we need to set up the ICU
182 * now so that these interrupts can be established correctly
183 * i.e. This is a hack.
184 */
185 #if NISA > 0 && !defined(SHARK)
186 isa_intr_init();
187 #endif
188
189 config_rootfound("mainbus", NULL);
190 #if defined(OFWGENCFG) || defined(SHARK)
191 /* Temporary for SHARK! */
192 ofrootfound();
193 #endif
194
195 #if defined(DIAGNOSTIC)
196 dump_spl_masks();
197 #endif /* defined(DIAGNOSTIC) */
198
199 /* Time to start taking interrupts so lets open the flood gates .... */
200 (void)spl0();
201 }
202
203 void
device_register(device_t dev,void * aux)204 device_register(device_t dev, void *aux)
205 {
206 #if defined(OFWGENCFG) || defined(SHARK)
207 /* Temporary for SHARK! */
208 ofw_device_register(dev, aux);
209 #endif
210 }
211 /* End of autoconf.c */
212