1 /* $NetBSD: autoconf.c,v 1.24 2011/02/08 20:20:21 rmind 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 1.24 2011/02/08 20:20:21 rmind 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 struct device *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 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 #if 0 100 dma_rev = ((volatile u_char *)IIOV(NEXT_P_SCR1))[1]; 101 switch (dma_rev) { 102 case 0: 103 intrmask = (volatile u_long *)IIOV(NEXT_P_INTRMASK_0); 104 intrstat = (volatile u_long *)IIOV(NEXT_P_INTRSTAT_0); 105 /* dspreg = (volatile u_long *)IIOV(0x2007000); */ 106 break; 107 case 1: 108 intrmask = (volatile u_long *)IIOV(NEXT_P_INTRMASK); 109 intrstat = (volatile u_long *)IIOV(NEXT_P_INTRSTAT); 110 /* dspreg = (volatile u_long *)IIOV(0x2108000); */ 111 break; 112 default: 113 panic("unknown DMA chip revision"); 114 } 115 #else 116 intrmask = (volatile u_long *)IIOV(rom_intrmask); 117 intrstat = (volatile u_long *)IIOV(rom_intrstat); 118 printf ("intrmask: %p\n", intrmask); 119 printf ("intrstat: %p\n", intrstat); 120 #endif 121 122 INTR_SETMASK(0); 123 124 if (config_rootfound("mainbus", NULL) == NULL) 125 panic("autoconfig failed, no root"); 126 127 /* Turn on interrupts */ 128 spl0(); 129 } 130 131 void 132 cpu_rootconf(void) 133 { 134 int count, lun, part; 135 136 count = lun = part = 0; 137 138 devidentparse (rom_boot_info, &count, &lun, &part); 139 booted_device = getdevunit (rom_boot_dev, count); 140 141 printf("boot device: %s\n", 142 (booted_device) ? booted_device->dv_xname : "<unknown>"); 143 144 setroot(booted_device, part); 145 } 146 147 /* 148 * find a device matching "name" and unit number 149 */ 150 static struct device * 151 getdevunit(const char *name, int unit) 152 { 153 int i; 154 155 for (i = 0; i < ndevice_equivs; i++) 156 if (device_equiv->alias && strcmp (name, device_equiv->alias) == 0) 157 name = device_equiv->real; 158 159 return device_find_by_driver_unit(name, unit); 160 } 161 162 /* 163 * Parse a device ident. 164 * 165 * Format: 166 * (count, lun, part) 167 */ 168 static int 169 devidentparse(const char *spec, int *count, int *lun, int *part) 170 { 171 int i; 172 const char *args[3]; 173 174 if (*spec == '(') { 175 /* tokenize device ident */ 176 args[0] = ++spec; 177 for (i = 1; *spec && *spec != ')' && i<3; spec++) { 178 if (*spec == ',') 179 args[i++] = ++spec; 180 } 181 if (*spec != ')') 182 goto baddev; 183 184 switch(i) { 185 case 3: 186 *count = atoi(args[0]); 187 *lun = atoi(args[1]); 188 *part = atoi(args[2]); 189 break; 190 case 2: 191 *lun = atoi(args[0]); 192 *part = atoi(args[1]); 193 break; 194 case 1: 195 *part = atoi(args[0]); 196 break; 197 case 0: 198 break; 199 } 200 } 201 else 202 goto baddev; 203 204 return 0; 205 206 baddev: 207 return ENXIO; 208 } 209 210 static int 211 atoi(const char *s) 212 { 213 int val = 0; 214 215 while(isdigit(*s)) 216 val = val * 10 + (*s++ - '0'); 217 return val; 218 } 219