1 /* $NetBSD: autoconf.c,v 1.81 2021/08/07 16:19:06 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Setup the system to run on the current machine. 34 * 35 * Configure() is called at boot time. Available devices are 36 * determined (from possibilities mentioned in ioconf.c), and 37 * the drivers are initialized. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.81 2021/08/07 16:19:06 thorpej Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/conf.h> 46 #include <sys/device.h> 47 48 #include "scsibus.h" 49 50 #if NSCSIBUS > 0 51 #include <dev/scsipi/scsi_all.h> 52 #include <dev/scsipi/scsipi_all.h> 53 #include <dev/scsipi/scsiconf.h> 54 #endif 55 56 #include <machine/autoconf.h> 57 #include <machine/mon.h> 58 59 #include <sun3/sun3/machdep.h> 60 61 62 /* Make sure the config is OK. */ 63 #if (defined(_SUN3_) + defined(_SUN3X_)) != 1 64 #error "Must have exactly one of: SUN3 and SUN3X options" 65 #endif 66 67 /* 68 * Do general device autoconfiguration, 69 * then choose root device (etc.) 70 * Called by sys/kern/subr_autoconf.c: configure() 71 */ 72 void 73 cpu_configure(void) 74 { 75 76 /* General device autoconfiguration. */ 77 if (config_rootfound("mainbus", NULL) == NULL) 78 panic("%s: mainbus not found", __func__); 79 80 /* 81 * Now that device autoconfiguration is finished, 82 * we can safely enable interrupts. 83 */ 84 printf("enabling interrupts\n"); 85 (void)spl0(); 86 } 87 88 /* 89 * bus_scan: 90 * This function is passed to config_search_ia() by the attach function 91 * for each of the "bus" drivers (obctl, obio, obmem, vme, ...). 92 * The purpose of this function is to copy the "locators" into our 93 * confargs structure, so child drivers may use the confargs both 94 * as match parameters and as temporary storage for the defaulted 95 * locator values determined in the child_match and preserved for 96 * the child_attach function. If the bus attach functions just 97 * used config_found, then we would not have an opportunity to 98 * setup the confargs for each child match and attach call. 99 */ 100 int 101 bus_scan(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 102 { 103 struct confargs *ca = aux; 104 105 #ifdef DIAGNOSTIC 106 if (cf->cf_fstate == FSTATE_STAR) 107 panic("%s: FSTATE_STAR", __func__); 108 #endif 109 110 /* 111 * Copy the locators into our confargs. 112 * Our parent set ca->ca_bustype already. 113 */ 114 ca->ca_paddr = cf->cf_paddr; 115 ca->ca_intpri = cf->cf_intpri; 116 ca->ca_intvec = cf->cf_intvec; 117 118 /* 119 * Note that this allows the probe function to save 120 * defaulted locators in the confargs that will be 121 * preserved for the related attach call. 122 * XXX - This is a hack... 123 */ 124 if (config_probe(parent, cf, ca)) { 125 config_attach(parent, cf, ca, bus_print, CFARGS_NONE); 126 } 127 return 0; 128 } 129 130 /* 131 * bus_print: 132 * Just print out the final (non-default) locators. 133 * The parent name is non-NULL when there was no match 134 * found by config_found(). 135 */ 136 int 137 bus_print(void *args, const char *name) 138 { 139 struct confargs *ca = args; 140 141 if (name) 142 aprint_normal("%s:", name); 143 144 if (ca->ca_paddr != -1) 145 aprint_normal(" addr 0x%lx", ca->ca_paddr); 146 if (ca->ca_intpri != -1) 147 aprint_normal(" ipl %d", ca->ca_intpri); 148 if (ca->ca_intvec != -1) 149 aprint_normal(" vect 0x%x", ca->ca_intvec); 150 151 return UNCONF; 152 } 153 154 /****************************************************************/ 155 156 /* This takes the args: name, ctlr, unit */ 157 typedef device_t (*findfunc_t)(char *, int, int); 158 159 static device_t net_find(char *, int, int); 160 #if NSCSIBUS > 0 161 static device_t scsi_find(char *, int, int); 162 #endif 163 static device_t xx_find(char *, int, int); 164 165 struct prom_n2f { 166 const char name[4]; 167 findfunc_t func; 168 }; 169 static struct prom_n2f prom_dev_table[] = { 170 { "ie", net_find }, 171 { "le", net_find }, 172 #if NSCSIBUS > 0 173 { "sd", scsi_find }, 174 #endif 175 { "xy", xx_find }, 176 { "xd", xx_find }, 177 { "", 0 }, 178 }; 179 180 /* 181 * Choose root and swap devices. 182 */ 183 void 184 cpu_rootconf(void) 185 { 186 struct bootparam *bp; 187 struct prom_n2f *nf; 188 const char *devname; 189 findfunc_t find; 190 char promname[4]; 191 char partname[4]; 192 193 /* PROM boot parameters. */ 194 bp = *romVectorPtr->bootParam; 195 196 /* 197 * Copy PROM boot device name (two letters) 198 * to a normal, null terminated string. 199 * (No terminating null in bp->devName) 200 */ 201 promname[0] = bp->devName[0]; 202 promname[1] = bp->devName[1]; 203 promname[2] = '\0'; 204 205 /* Default to "unknown" */ 206 booted_device = NULL; 207 booted_partition = 0; 208 devname = "<unknown>"; 209 partname[0] = '\0'; 210 find = NULL; 211 212 /* Do we know anything about the PROM boot device? */ 213 for (nf = prom_dev_table; nf->func; nf++) 214 if (!strcmp(nf->name, promname)) { 215 find = nf->func; 216 break; 217 } 218 if (find) 219 booted_device = (*find)(promname, bp->ctlrNum, bp->unitNum); 220 if (booted_device) { 221 devname = device_xname(booted_device); 222 if (device_class(booted_device) == DV_DISK) { 223 booted_partition = bp->partNum & 7; 224 partname[0] = 'a' + booted_partition; 225 partname[1] = '\0'; 226 } 227 } 228 229 printf("boot device: %s%s\n", devname, partname); 230 rootconf(); 231 } 232 233 /* 234 * Functions to find devices using PROM boot parameters. 235 */ 236 237 /* 238 * Network device: Just use controller number. 239 */ 240 static device_t 241 net_find(char *name, int ctlr, int unit) 242 { 243 return device_find_by_driver_unit(name, ctlr); 244 } 245 246 #if NSCSIBUS > 0 247 /* 248 * SCSI device: The controller number corresponds to the 249 * scsibus number, and the unit number is (targ*8 + LUN). 250 */ 251 static device_t 252 scsi_find(char *name, int ctlr, int unit) 253 { 254 device_t scsibus; 255 struct scsibus_softc *sbsc; 256 struct scsipi_periph *periph; 257 int target, lun; 258 259 scsibus = device_find_by_driver_unit("scsibus", ctlr); 260 if (scsibus == NULL) 261 return NULL; 262 263 /* Compute SCSI target/LUN from PROM unit. */ 264 target = (unit >> 3) & 7; 265 lun = unit & 7; 266 267 /* Find the device at this target/LUN */ 268 sbsc = device_private(scsibus); 269 periph = scsipi_lookup_periph(sbsc->sc_channel, target, lun); 270 if (periph == NULL) 271 return NULL; 272 273 return periph->periph_dev; 274 } 275 #endif /* NSCSIBUS > 0 */ 276 277 /* 278 * Xylogics SMD disk: (xy, xd) 279 * Assume wired-in unit numbers for now... 280 */ 281 static device_t 282 xx_find(char *name, int ctlr, int unit) 283 { 284 return device_find_by_driver_unit(name, ctlr * 2 + unit); 285 } 286 287 /* 288 * Misc. helpers used by driver match/attach functions. 289 */ 290 291 /* 292 * Read addr with size len (1,2,4) into val. 293 * If this generates a bus error, return -1 294 * 295 * Create a temporary mapping, 296 * Try the access using peek_* 297 * Clean up temp. mapping 298 */ 299 int 300 bus_peek(int bustype, int pa, int sz) 301 { 302 void *va; 303 int rv; 304 305 va = bus_tmapin(bustype, pa); 306 switch (sz) { 307 case 1: 308 rv = peek_byte(va); 309 break; 310 case 2: 311 rv = peek_word(va); 312 break; 313 case 4: 314 rv = peek_long(va); 315 break; 316 default: 317 printf(" %s: invalid size=%d\n", __func__, sz); 318 rv = -1; 319 } 320 bus_tmapout(va); 321 322 return rv; 323 } 324 325 /* from hp300: badbaddr() */ 326 int 327 peek_byte(void *addr) 328 { 329 label_t faultbuf; 330 int x; 331 332 nofault = &faultbuf; 333 if (setjmp(&faultbuf)) 334 x = -1; 335 else 336 x = *(volatile u_char *)addr; 337 338 nofault = NULL; 339 return x; 340 } 341 342 int 343 peek_word(void *addr) 344 { 345 label_t faultbuf; 346 int x; 347 348 nofault = &faultbuf; 349 if (setjmp(&faultbuf)) 350 x = -1; 351 else 352 x = *(volatile u_short *)addr; 353 354 nofault = NULL; 355 return x; 356 } 357 358 int 359 peek_long(void *addr) 360 { 361 label_t faultbuf; 362 int x; 363 364 nofault = &faultbuf; 365 if (setjmp(&faultbuf)) 366 x = -1; 367 else { 368 x = *(volatile int *)addr; 369 if (x == -1) { 370 printf("%s: uh-oh, actually read -1!\n", __func__); 371 x &= 0x7FFFffff; /* XXX */ 372 } 373 } 374 375 nofault = NULL; 376 return x; 377 } 378