1 /* $NetBSD: autoconf.c,v 1.28 2023/02/03 23:13:01 tsutsui Exp $ */
2
3 /*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 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.
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 $Hdr: autoconf.c 1.36 92/12/20$
37 *
38 * @(#)autoconf.c 8.2 (Berkeley) 1/12/94
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 #include <sys/cdefs.h>
50 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.28 2023/02/03 23:13:01 tsutsui Exp $");
51
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/buf.h>
55 #include <sys/conf.h>
56 #include <sys/reboot.h>
57 #include <sys/device.h>
58
59 #include <machine/vmparam.h>
60 #include <machine/autoconf.h>
61 #include <machine/disklabel.h>
62 #include <machine/cpu.h>
63 #include <machine/pte.h>
64
65 #include <next68k/next68k/isr.h>
66 #include <next68k/next68k/nextrom.h>
67
68 #include <next68k/dev/intiovar.h>
69
70 volatile u_long *intrstat;
71 volatile u_long *intrmask;
72
73 static device_t getdevunit(const char *, int);
74 static int devidentparse(const char *, int *, int *, int *);
75 static int atoi(const char *);
76
77 struct device_equiv {
78 const char *alias;
79 const char *real;
80 };
81 static struct device_equiv device_equiv[] = {
82 { "en", "xe" },
83 { "tp", "xe" },
84 };
85 static int ndevice_equivs = (sizeof(device_equiv)/sizeof(device_equiv[0]));
86
87 /*
88 * Determine mass storage and memory configuration for a machine.
89 */
90 void
cpu_configure(void)91 cpu_configure(void)
92 {
93 /* int dma_rev; */
94 extern u_int rom_intrmask;
95 extern u_int rom_intrstat;
96
97 booted_device = NULL; /* set by device drivers (if found) */
98
99 /* Initialize the interrupt handlers. */
100 isrinit();
101
102 #if 0
103 dma_rev = ((volatile u_char *)IIOV(NEXT_P_SCR1))[1];
104 switch (dma_rev) {
105 case 0:
106 intrmask = (volatile u_long *)IIOV(NEXT_P_INTRMASK_0);
107 intrstat = (volatile u_long *)IIOV(NEXT_P_INTRSTAT_0);
108 /* dspreg = (volatile u_long *)IIOV(0x2007000); */
109 break;
110 case 1:
111 intrmask = (volatile u_long *)IIOV(NEXT_P_INTRMASK);
112 intrstat = (volatile u_long *)IIOV(NEXT_P_INTRSTAT);
113 /* dspreg = (volatile u_long *)IIOV(0x2108000); */
114 break;
115 default:
116 panic("unknown DMA chip revision");
117 }
118 #else
119 intrmask = (volatile u_long *)IIOV(rom_intrmask);
120 intrstat = (volatile u_long *)IIOV(rom_intrstat);
121 printf ("intrmask: %p\n", intrmask);
122 printf ("intrstat: %p\n", intrstat);
123 #endif
124
125 INTR_SETMASK(0);
126
127 if (config_rootfound("mainbus", NULL) == NULL)
128 panic("autoconfig failed, no root");
129
130 /* Turn on interrupts */
131 spl0();
132 }
133
134 void
cpu_rootconf(void)135 cpu_rootconf(void)
136 {
137 int count, lun, part;
138
139 count = lun = part = 0;
140
141 devidentparse (rom_boot_info, &count, &lun, &part);
142 booted_device = getdevunit (rom_boot_dev, count);
143
144 printf("boot device: %s\n",
145 (booted_device) ? device_xname(booted_device) : "<unknown>");
146
147 rootconf();
148 }
149
150 /*
151 * find a device matching "name" and unit number
152 */
153 static device_t
getdevunit(const char * name,int unit)154 getdevunit(const char *name, int unit)
155 {
156 int i;
157
158 for (i = 0; i < ndevice_equivs; i++)
159 if (device_equiv->alias &&
160 strcmp(name, device_equiv->alias) == 0)
161 name = device_equiv->real;
162
163 return device_find_by_driver_unit(name, unit);
164 }
165
166 /*
167 * Parse a device ident.
168 *
169 * Format:
170 * (count, lun, part)
171 */
172 static int
devidentparse(const char * spec,int * count,int * lun,int * part)173 devidentparse(const char *spec, int *count, int *lun, int *part)
174 {
175 int i;
176 const char *args[3];
177
178 if (*spec == '(') {
179 /* tokenize device ident */
180 args[0] = ++spec;
181 for (i = 1; *spec && *spec != ')' && i < 3; spec++) {
182 if (*spec == ',')
183 args[i++] = ++spec;
184 }
185 if (*spec != ')')
186 goto baddev;
187
188 switch(i) {
189 case 3:
190 *count = atoi(args[0]);
191 *lun = atoi(args[1]);
192 *part = atoi(args[2]);
193 break;
194 case 2:
195 *lun = atoi(args[0]);
196 *part = atoi(args[1]);
197 break;
198 case 1:
199 *part = atoi(args[0]);
200 break;
201 case 0:
202 break;
203 }
204 } else
205 goto baddev;
206
207 return 0;
208
209 baddev:
210 return ENXIO;
211 }
212
213 static int
atoi(const char * s)214 atoi(const char *s)
215 {
216 int val = 0;
217
218 while (isdigit(*s))
219 val = val * 10 + (*s++ - '0');
220 return val;
221 }
222