1 /* $NetBSD: autoconf.c,v 1.55 2001/04/25 17:53:25 bouyer 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 <dev/scsipi/scsi_all.h> 53 #include <dev/scsipi/scsipi_all.h> 54 #include <dev/scsipi/scsiconf.h> 55 56 #include <machine/autoconf.h> 57 #include <machine/mon.h> 58 59 #include <sun3/sun3/machdep.h> 60 61 /* Make sure the config is OK. */ 62 #if (defined(_SUN3_) + defined(_SUN3X_)) != 1 63 #error "Must have exactly one of: SUN3 and SUN3X options" 64 #endif 65 66 /* 67 * Do general device autoconfiguration, 68 * then choose root device (etc.) 69 * Called by machdep.c: cpu_startup() 70 */ 71 void 72 cpu_configure() 73 { 74 75 /* General device autoconfiguration. */ 76 if (config_rootfound("mainbus", NULL) == NULL) 77 panic("configure: mainbus not found"); 78 79 /* 80 * Now that device autoconfiguration is finished, 81 * we can safely enable interrupts. 82 */ 83 printf("enabling interrupts\n"); 84 (void)spl0(); 85 } 86 87 /* 88 * bus_scan: 89 * This function is passed to config_search() by the attach function 90 * for each of the "bus" drivers (obctl, obio, obmem, vme, ...). 91 * The purpose of this function is to copy the "locators" into our 92 * confargs structure, so child drivers may use the confargs both 93 * as match parameters and as temporary storage for the defaulted 94 * locator values determined in the child_match and preserved for 95 * the child_attach function. If the bus attach functions just 96 * used config_found, then we would not have an opportunity to 97 * setup the confargs for each child match and attach call. 98 */ 99 int bus_scan(parent, cf, aux) 100 struct device *parent; 101 struct cfdata *cf; 102 void *aux; 103 { 104 struct confargs *ca = aux; 105 cfmatch_t mf; 106 107 #ifdef DIAGNOSTIC 108 if (cf->cf_fstate == FSTATE_STAR) 109 panic("bus_scan: FSTATE_STAR"); 110 #endif 111 112 /* 113 * Copy the locators into our confargs. 114 * Our parent set ca->ca_bustype already. 115 */ 116 ca->ca_paddr = cf->cf_paddr; 117 ca->ca_intpri = cf->cf_intpri; 118 ca->ca_intvec = cf->cf_intvec; 119 120 /* 121 * Note that this allows the match function to save 122 * defaulted locators in the confargs that will be 123 * preserved for the related attach call. 124 * XXX - This is a hack... 125 */ 126 mf = cf->cf_attach->ca_match; 127 if ((*mf)(parent, cf, ca) > 0) { 128 config_attach(parent, cf, ca, bus_print); 129 } 130 return (0); 131 } 132 133 /* 134 * bus_print: 135 * Just print out the final (non-default) locators. 136 * The parent name is non-NULL when there was no match 137 * found by config_found(). 138 */ 139 int 140 bus_print(args, name) 141 void *args; 142 const char *name; 143 { 144 struct confargs *ca = args; 145 146 if (name) 147 printf("%s:", name); 148 149 if (ca->ca_paddr != -1) 150 printf(" addr 0x%x", ca->ca_paddr); 151 if (ca->ca_intpri != -1) 152 printf(" ipl %d", ca->ca_intpri); 153 if (ca->ca_intvec != -1) 154 printf(" vect 0x%x", ca->ca_intvec); 155 156 return(UNCONF); 157 } 158 159 /****************************************************************/ 160 161 /* This takes the args: name, ctlr, unit */ 162 typedef struct device * (*findfunc_t) __P((char *, int, int)); 163 164 static struct device * find_dev_byname __P((char *)); 165 static struct device * net_find __P((char *, int, int)); 166 static struct device * scsi_find __P((char *, int, int)); 167 static struct device * xx_find __P((char *, int, int)); 168 169 struct prom_n2f { 170 const char name[4]; 171 findfunc_t func; 172 }; 173 static struct prom_n2f prom_dev_table[] = { 174 { "ie", net_find }, 175 { "le", net_find }, 176 { "sd", scsi_find }, 177 { "xy", xx_find }, 178 { "xd", xx_find }, 179 { "", 0 }, 180 }; 181 182 /* 183 * Choose root and swap devices. 184 */ 185 void 186 cpu_rootconf() 187 { 188 struct bootparam *bp; 189 struct prom_n2f *nf; 190 struct device *boot_device; 191 int boot_partition; 192 char *devname; 193 findfunc_t find; 194 char promname[4]; 195 char partname[4]; 196 197 /* PROM boot parameters. */ 198 bp = *romVectorPtr->bootParam; 199 200 /* 201 * Copy PROM boot device name (two letters) 202 * to a normal, null terminated string. 203 * (No terminating null in bp->devName) 204 */ 205 promname[0] = bp->devName[0]; 206 promname[1] = bp->devName[1]; 207 promname[2] = '\0'; 208 209 /* Default to "unknown" */ 210 boot_device = NULL; 211 boot_partition = 0; 212 devname = "<unknown>"; 213 partname[0] = '\0'; 214 find = NULL; 215 216 /* Do we know anything about the PROM boot device? */ 217 for (nf = prom_dev_table; nf->func; nf++) 218 if (!strcmp(nf->name, promname)) { 219 find = nf->func; 220 break; 221 } 222 if (find) 223 boot_device = (*find)(promname, bp->ctlrNum, bp->unitNum); 224 if (boot_device) { 225 devname = boot_device->dv_xname; 226 if (boot_device->dv_class == DV_DISK) { 227 boot_partition = bp->partNum & 7; 228 partname[0] = 'a' + boot_partition; 229 partname[1] = '\0'; 230 } 231 } 232 233 printf("boot device: %s%s\n", devname, partname); 234 setroot(boot_device, boot_partition); 235 } 236 237 /* 238 * Functions to find devices using PROM boot parameters. 239 */ 240 241 /* 242 * Network device: Just use controller number. 243 */ 244 static struct device * 245 net_find(name, ctlr, unit) 246 char *name; 247 int ctlr, unit; 248 { 249 char tname[16]; 250 251 sprintf(tname, "%s%d", name, ctlr); 252 return (find_dev_byname(tname)); 253 } 254 255 /* 256 * SCSI device: The controller number corresponds to the 257 * scsibus number, and the unit number is (targ*8 + LUN). 258 */ 259 static struct device * 260 scsi_find(name, ctlr, unit) 261 char *name; 262 int ctlr, unit; 263 { 264 struct device *scsibus; 265 struct scsibus_softc *sbsc; 266 struct scsipi_periph *periph; 267 int target, lun; 268 char tname[16]; 269 270 sprintf(tname, "scsibus%d", ctlr); 271 scsibus = find_dev_byname(tname); 272 if (scsibus == NULL) 273 return (NULL); 274 275 /* Compute SCSI target/LUN from PROM unit. */ 276 target = (unit >> 3) & 7; 277 lun = unit & 7; 278 279 /* Find the device at this target/LUN */ 280 sbsc = (struct scsibus_softc *)scsibus; 281 periph = sbsc->sc_channel->chan_periphs[target][lun]; 282 if (periph == NULL) 283 return (NULL); 284 285 return (periph->periph_dev); 286 } 287 288 /* 289 * Xylogics SMD disk: (xy, xd) 290 * Assume wired-in unit numbers for now... 291 */ 292 static struct device * 293 xx_find(name, ctlr, unit) 294 char *name; 295 int ctlr, unit; 296 { 297 int diskunit; 298 char tname[16]; 299 300 diskunit = (ctlr * 2) + unit; 301 sprintf(tname, "%s%d", name, diskunit); 302 return (find_dev_byname(tname)); 303 } 304 305 /* 306 * Given a device name, find its struct device 307 * XXX - Move this to some common file? 308 */ 309 static struct device * 310 find_dev_byname(name) 311 char *name; 312 { 313 struct device *dv; 314 315 for (dv = alldevs.tqh_first; dv != NULL; 316 dv = dv->dv_list.tqe_next) { 317 if (!strcmp(dv->dv_xname, name)) { 318 return(dv); 319 } 320 } 321 return (NULL); 322 } 323 324 /* 325 * Misc. helpers used by driver match/attach functions. 326 */ 327 328 /* 329 * Read addr with size len (1,2,4) into val. 330 * If this generates a bus error, return -1 331 * 332 * Create a temporary mapping, 333 * Try the access using peek_* 334 * Clean up temp. mapping 335 */ 336 int 337 bus_peek(bustype, pa, sz) 338 int bustype, pa, sz; 339 { 340 caddr_t va; 341 int rv; 342 343 va = bus_tmapin(bustype, pa); 344 switch (sz) { 345 case 1: 346 rv = peek_byte(va); 347 break; 348 case 2: 349 rv = peek_word(va); 350 break; 351 case 4: 352 rv = peek_long(va); 353 break; 354 default: 355 printf(" bus_peek: invalid size=%d\n", sz); 356 rv = -1; 357 } 358 bus_tmapout(va); 359 360 return (rv); 361 } 362 363 /* from hp300: badbaddr() */ 364 int 365 peek_byte(addr) 366 register caddr_t addr; 367 { 368 label_t faultbuf; 369 register int x; 370 371 nofault = &faultbuf; 372 if (setjmp(&faultbuf)) 373 x = -1; 374 else 375 x = *(volatile u_char *)addr; 376 377 nofault = NULL; 378 return(x); 379 } 380 381 int 382 peek_word(addr) 383 register caddr_t addr; 384 { 385 label_t faultbuf; 386 register int x; 387 388 nofault = &faultbuf; 389 if (setjmp(&faultbuf)) 390 x = -1; 391 else 392 x = *(volatile u_short *)addr; 393 394 nofault = NULL; 395 return(x); 396 } 397 398 int 399 peek_long(addr) 400 register caddr_t addr; 401 { 402 label_t faultbuf; 403 register int x; 404 405 nofault = &faultbuf; 406 if (setjmp(&faultbuf)) 407 x = -1; 408 else { 409 x = *(volatile int *)addr; 410 if (x == -1) { 411 printf("peek_long: uh-oh, actually read -1!\n"); 412 x &= 0x7FFFffff; /* XXX */ 413 } 414 } 415 416 nofault = NULL; 417 return(x); 418 } 419