1 /* $NetBSD: autoconf.c,v 1.59 2002/09/27 03:18:07 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Glass and Gordon W. Ross. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Setup the system to run on the current machine. 41 * 42 * Configure() is called at boot time. Available devices are 43 * determined (from possibilities mentioned in ioconf.c), and 44 * the drivers are initialized. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/conf.h> 50 #include <sys/device.h> 51 52 #include "scsibus.h" 53 54 #if NSCSIBUS > 0 55 #include <dev/scsipi/scsi_all.h> 56 #include <dev/scsipi/scsipi_all.h> 57 #include <dev/scsipi/scsiconf.h> 58 #endif 59 60 #include <machine/autoconf.h> 61 #include <machine/mon.h> 62 63 #include <sun3/sun3/machdep.h> 64 65 66 /* Make sure the config is OK. */ 67 #if (defined(_SUN3_) + defined(_SUN3X_)) != 1 68 #error "Must have exactly one of: SUN3 and SUN3X options" 69 #endif 70 71 /* 72 * Do general device autoconfiguration, 73 * then choose root device (etc.) 74 * Called by machdep.c: cpu_startup() 75 */ 76 void 77 cpu_configure() 78 { 79 80 /* General device autoconfiguration. */ 81 if (config_rootfound("mainbus", NULL) == NULL) 82 panic("configure: mainbus not found"); 83 84 /* 85 * Now that device autoconfiguration is finished, 86 * we can safely enable interrupts. 87 */ 88 printf("enabling interrupts\n"); 89 (void)spl0(); 90 } 91 92 /* 93 * bus_scan: 94 * This function is passed to config_search() by the attach function 95 * for each of the "bus" drivers (obctl, obio, obmem, vme, ...). 96 * The purpose of this function is to copy the "locators" into our 97 * confargs structure, so child drivers may use the confargs both 98 * as match parameters and as temporary storage for the defaulted 99 * locator values determined in the child_match and preserved for 100 * the child_attach function. If the bus attach functions just 101 * used config_found, then we would not have an opportunity to 102 * setup the confargs for each child match and attach call. 103 */ 104 int bus_scan(parent, cf, aux) 105 struct device *parent; 106 struct cfdata *cf; 107 void *aux; 108 { 109 struct confargs *ca = aux; 110 111 #ifdef DIAGNOSTIC 112 if (cf->cf_fstate == FSTATE_STAR) 113 panic("bus_scan: FSTATE_STAR"); 114 #endif 115 116 /* 117 * Copy the locators into our confargs. 118 * Our parent set ca->ca_bustype already. 119 */ 120 ca->ca_paddr = cf->cf_paddr; 121 ca->ca_intpri = cf->cf_intpri; 122 ca->ca_intvec = cf->cf_intvec; 123 124 /* 125 * Note that this allows the match function to save 126 * defaulted locators in the confargs that will be 127 * preserved for the related attach call. 128 * XXX - This is a hack... 129 */ 130 if (config_match(parent, cf, ca) > 0) { 131 config_attach(parent, cf, ca, bus_print); 132 } 133 return (0); 134 } 135 136 /* 137 * bus_print: 138 * Just print out the final (non-default) locators. 139 * The parent name is non-NULL when there was no match 140 * found by config_found(). 141 */ 142 int 143 bus_print(args, name) 144 void *args; 145 const char *name; 146 { 147 struct confargs *ca = args; 148 149 if (name) 150 printf("%s:", name); 151 152 if (ca->ca_paddr != -1) 153 printf(" addr 0x%x", ca->ca_paddr); 154 if (ca->ca_intpri != -1) 155 printf(" ipl %d", ca->ca_intpri); 156 if (ca->ca_intvec != -1) 157 printf(" vect 0x%x", ca->ca_intvec); 158 159 return(UNCONF); 160 } 161 162 /****************************************************************/ 163 164 /* This takes the args: name, ctlr, unit */ 165 typedef struct device * (*findfunc_t) __P((char *, int, int)); 166 167 static struct device * find_dev_byname __P((char *)); 168 static struct device * net_find __P((char *, int, int)); 169 #if NSCSIBUS > 0 170 static struct device * scsi_find __P((char *, int, int)); 171 #endif 172 static struct device * xx_find __P((char *, int, int)); 173 174 struct prom_n2f { 175 const char name[4]; 176 findfunc_t func; 177 }; 178 static struct prom_n2f prom_dev_table[] = { 179 { "ie", net_find }, 180 { "le", net_find }, 181 #if NSCSIBUS > 0 182 { "sd", scsi_find }, 183 #endif 184 { "xy", xx_find }, 185 { "xd", xx_find }, 186 { "", 0 }, 187 }; 188 189 /* 190 * Choose root and swap devices. 191 */ 192 void 193 cpu_rootconf() 194 { 195 struct bootparam *bp; 196 struct prom_n2f *nf; 197 struct device *boot_device; 198 int boot_partition; 199 char *devname; 200 findfunc_t find; 201 char promname[4]; 202 char partname[4]; 203 204 /* PROM boot parameters. */ 205 bp = *romVectorPtr->bootParam; 206 207 /* 208 * Copy PROM boot device name (two letters) 209 * to a normal, null terminated string. 210 * (No terminating null in bp->devName) 211 */ 212 promname[0] = bp->devName[0]; 213 promname[1] = bp->devName[1]; 214 promname[2] = '\0'; 215 216 /* Default to "unknown" */ 217 boot_device = NULL; 218 boot_partition = 0; 219 devname = "<unknown>"; 220 partname[0] = '\0'; 221 find = NULL; 222 223 /* Do we know anything about the PROM boot device? */ 224 for (nf = prom_dev_table; nf->func; nf++) 225 if (!strcmp(nf->name, promname)) { 226 find = nf->func; 227 break; 228 } 229 if (find) 230 boot_device = (*find)(promname, bp->ctlrNum, bp->unitNum); 231 if (boot_device) { 232 devname = boot_device->dv_xname; 233 if (boot_device->dv_class == DV_DISK) { 234 boot_partition = bp->partNum & 7; 235 partname[0] = 'a' + boot_partition; 236 partname[1] = '\0'; 237 } 238 } 239 240 printf("boot device: %s%s\n", devname, partname); 241 setroot(boot_device, boot_partition); 242 } 243 244 /* 245 * Functions to find devices using PROM boot parameters. 246 */ 247 248 /* 249 * Network device: Just use controller number. 250 */ 251 static struct device * 252 net_find(name, ctlr, unit) 253 char *name; 254 int ctlr, unit; 255 { 256 char tname[16]; 257 258 sprintf(tname, "%s%d", name, ctlr); 259 return (find_dev_byname(tname)); 260 } 261 262 #if NSCSIBUS > 0 263 /* 264 * SCSI device: The controller number corresponds to the 265 * scsibus number, and the unit number is (targ*8 + LUN). 266 */ 267 static struct device * 268 scsi_find(name, ctlr, unit) 269 char *name; 270 int ctlr, unit; 271 { 272 struct device *scsibus; 273 struct scsibus_softc *sbsc; 274 struct scsipi_periph *periph; 275 int target, lun; 276 char tname[16]; 277 278 sprintf(tname, "scsibus%d", ctlr); 279 scsibus = find_dev_byname(tname); 280 if (scsibus == NULL) 281 return (NULL); 282 283 /* Compute SCSI target/LUN from PROM unit. */ 284 target = (unit >> 3) & 7; 285 lun = unit & 7; 286 287 /* Find the device at this target/LUN */ 288 sbsc = (struct scsibus_softc *)scsibus; 289 periph = scsipi_lookup_periph(sbsc->sc_channel, target, lun); 290 if (periph == NULL) 291 return (NULL); 292 293 return (periph->periph_dev); 294 } 295 #endif /* NSCSIBUS > 0 */ 296 297 /* 298 * Xylogics SMD disk: (xy, xd) 299 * Assume wired-in unit numbers for now... 300 */ 301 static struct device * 302 xx_find(name, ctlr, unit) 303 char *name; 304 int ctlr, unit; 305 { 306 int diskunit; 307 char tname[16]; 308 309 diskunit = (ctlr * 2) + unit; 310 sprintf(tname, "%s%d", name, diskunit); 311 return (find_dev_byname(tname)); 312 } 313 314 /* 315 * Given a device name, find its struct device 316 * XXX - Move this to some common file? 317 */ 318 static struct device * 319 find_dev_byname(name) 320 char *name; 321 { 322 struct device *dv; 323 324 for (dv = alldevs.tqh_first; dv != NULL; 325 dv = dv->dv_list.tqe_next) { 326 if (!strcmp(dv->dv_xname, name)) { 327 return(dv); 328 } 329 } 330 return (NULL); 331 } 332 333 /* 334 * Misc. helpers used by driver match/attach functions. 335 */ 336 337 /* 338 * Read addr with size len (1,2,4) into val. 339 * If this generates a bus error, return -1 340 * 341 * Create a temporary mapping, 342 * Try the access using peek_* 343 * Clean up temp. mapping 344 */ 345 int 346 bus_peek(bustype, pa, sz) 347 int bustype, pa, sz; 348 { 349 caddr_t va; 350 int rv; 351 352 va = bus_tmapin(bustype, pa); 353 switch (sz) { 354 case 1: 355 rv = peek_byte(va); 356 break; 357 case 2: 358 rv = peek_word(va); 359 break; 360 case 4: 361 rv = peek_long(va); 362 break; 363 default: 364 printf(" bus_peek: invalid size=%d\n", sz); 365 rv = -1; 366 } 367 bus_tmapout(va); 368 369 return (rv); 370 } 371 372 /* from hp300: badbaddr() */ 373 int 374 peek_byte(addr) 375 caddr_t addr; 376 { 377 label_t faultbuf; 378 int x; 379 380 nofault = &faultbuf; 381 if (setjmp(&faultbuf)) 382 x = -1; 383 else 384 x = *(volatile u_char *)addr; 385 386 nofault = NULL; 387 return(x); 388 } 389 390 int 391 peek_word(addr) 392 caddr_t addr; 393 { 394 label_t faultbuf; 395 int x; 396 397 nofault = &faultbuf; 398 if (setjmp(&faultbuf)) 399 x = -1; 400 else 401 x = *(volatile u_short *)addr; 402 403 nofault = NULL; 404 return(x); 405 } 406 407 int 408 peek_long(addr) 409 caddr_t addr; 410 { 411 label_t faultbuf; 412 int x; 413 414 nofault = &faultbuf; 415 if (setjmp(&faultbuf)) 416 x = -1; 417 else { 418 x = *(volatile int *)addr; 419 if (x == -1) { 420 printf("peek_long: uh-oh, actually read -1!\n"); 421 x &= 0x7FFFffff; /* XXX */ 422 } 423 } 424 425 nofault = NULL; 426 return(x); 427 } 428