ofdev.c revision 1.19
1 2 3 /* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Device I/O routines using Open Firmware 35 */ 36 #include <sys/param.h> 37 #include <sys/disklabel.h> 38 #ifdef NETBOOT 39 #include <netinet/in.h> 40 #endif 41 42 #include <lib/libsa/stand.h> 43 #include <lib/libsa/ufs.h> 44 #include <lib/libsa/cd9660.h> 45 #ifdef NETBOOT 46 #include <lib/libsa/nfs.h> 47 #include <lib/libsa/tftp.h> 48 #endif 49 #include <lib/libkern/libkern.h> 50 51 #include <dev/sun/disklabel.h> 52 #include <dev/raidframe/raidframevar.h> 53 54 #include <machine/promlib.h> 55 56 #include "ofdev.h" 57 #include "boot.h" 58 59 extern char bootdev[]; 60 61 /* 62 * This is ugly. A path on a sparc machine is something like this: 63 * 64 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 65 * 66 */ 67 68 char * 69 filename(char *str, char *ppart) 70 { 71 char *cp, *lp; 72 char savec; 73 int dhandle; 74 char devtype[16]; 75 76 lp = str; 77 devtype[0] = 0; 78 *ppart = '\0'; 79 for (cp = str; *cp; lp = cp) { 80 /* For each component of the path name... */ 81 while (*++cp && *cp != '/'); 82 savec = *cp; 83 *cp = 0; 84 /* ...look whether there is a device with this name */ 85 dhandle = prom_finddevice(str); 86 DPRINTF(("filename: prom_finddevice(%s) returned %x\n", 87 str, dhandle)); 88 *cp = savec; 89 if (dhandle == -1) { 90 /* 91 * if not, lp is the delimiter between device and 92 * path. if the last component was a block device. 93 */ 94 if (!strcmp(devtype, "block")) { 95 /* search for arguments */ 96 DPRINTF(("filename: hunting for arguments " 97 "in %s\n", lp)); 98 for (cp = lp; ; ) { 99 cp--; 100 if (cp < str || 101 cp[0] == '/' || 102 (cp[0] == ' ' && (cp+1) != lp && 103 cp[1] == '-')) 104 break; 105 } 106 if (cp >= str && *cp == '-') 107 /* found arguments, make firmware 108 ignore them */ 109 *cp = 0; 110 for (cp = lp; *--cp && *cp != ',' 111 && *cp != ':';) 112 ; 113 if (cp[0] == ':' && cp[1] >= 'a' && 114 cp[1] <= 'a' + MAXPARTITIONS) { 115 *ppart = cp[1]; 116 cp[0] = '\0'; 117 } 118 } 119 DPRINTF(("filename: found %s\n",lp)); 120 return lp; 121 } else if (_prom_getprop(dhandle, "device_type", devtype, 122 sizeof devtype) < 0) 123 devtype[0] = 0; 124 } 125 DPRINTF(("filename: not found\n",lp)); 126 return 0; 127 } 128 129 static int 130 strategy(devdata, rw, blk, size, buf, rsize) 131 void *devdata; 132 int rw; 133 daddr_t blk; 134 size_t size; 135 void *buf; 136 size_t *rsize; 137 { 138 struct of_dev *dev = devdata; 139 u_quad_t pos; 140 int n; 141 142 if (rw != F_READ) 143 return EPERM; 144 if (dev->type != OFDEV_DISK) 145 panic("strategy"); 146 147 #ifdef NON_DEBUG 148 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 149 (long)blk, (long)dev->partoff, (long)dev->bsize); 150 printf("strategy: seek position should be: %lx\n", 151 (long)((blk + dev->partoff) * dev->bsize)); 152 #endif 153 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 154 155 for (;;) { 156 #ifdef NON_DEBUG 157 printf("strategy: seeking to %lx\n", (long)pos); 158 #endif 159 if (prom_seek(dev->handle, pos) < 0) 160 break; 161 #ifdef NON_DEBUG 162 printf("strategy: reading %lx at %p\n", (long)size, buf); 163 #endif 164 n = prom_read(dev->handle, buf, size); 165 if (n == -2) 166 continue; 167 if (n < 0) 168 break; 169 *rsize = n; 170 return 0; 171 } 172 return EIO; 173 } 174 175 static int 176 devclose(struct open_file *of) 177 { 178 struct of_dev *op = of->f_devdata; 179 180 #ifdef NETBOOT 181 if (op->type == OFDEV_NET) 182 net_close(op); 183 #endif 184 prom_close(op->handle); 185 op->handle = -1; 186 } 187 188 static struct devsw ofdevsw[1] = { 189 "OpenFirmware", 190 strategy, 191 (int (*)(struct open_file *, ...))nodev, 192 devclose, 193 noioctl 194 }; 195 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 196 197 #ifdef SPARC_BOOT_UFS 198 static struct fs_ops file_system_ufs = FS_OPS(ufs); 199 #endif 200 #ifdef SPARC_BOOT_CD9660 201 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 202 #endif 203 #ifdef NETBOOT 204 static struct fs_ops file_system_nfs = FS_OPS(nfs); 205 static struct fs_ops file_system_tftp = FS_OPS(tftp); 206 #endif 207 208 struct fs_ops file_system[3]; 209 int nfsys; 210 211 static struct of_dev ofdev = { 212 -1, 213 }; 214 215 char opened_name[256]; 216 int floppyboot; 217 218 static u_long 219 get_long(const void *p) 220 { 221 const unsigned char *cp = p; 222 223 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 224 } 225 /************************************************************************ 226 * 227 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 228 * and then substantially rewritten by Gordon W. Ross 229 * 230 ************************************************************************/ 231 232 /* What partition types to assume for Sun disklabels: */ 233 static u_char 234 sun_fstypes[8] = { 235 FS_BSDFFS, /* a */ 236 FS_SWAP, /* b */ 237 FS_OTHER, /* c - whole disk */ 238 FS_BSDFFS, /* d */ 239 FS_BSDFFS, /* e */ 240 FS_BSDFFS, /* f */ 241 FS_BSDFFS, /* g */ 242 FS_BSDFFS, /* h */ 243 }; 244 245 /* 246 * Given a SunOS disk label, set lp to a BSD disk label. 247 * Returns NULL on success, else an error string. 248 * 249 * The BSD label is cleared out before this is called. 250 */ 251 static char * 252 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 253 { 254 struct sun_disklabel *sl; 255 struct partition *npp; 256 struct sun_dkpart *spp; 257 int i, secpercyl; 258 u_short cksum, *sp1, *sp2; 259 260 sl = (struct sun_disklabel *)cp; 261 262 /* Verify the XOR check. */ 263 sp1 = (u_short *)sl; 264 sp2 = (u_short *)(sl + 1); 265 cksum = 0; 266 while (sp1 < sp2) 267 cksum ^= *sp1++; 268 if (cksum != 0) 269 return("SunOS disk label, bad checksum"); 270 271 /* Format conversion. */ 272 lp->d_magic = DISKMAGIC; 273 lp->d_magic2 = DISKMAGIC; 274 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 275 276 lp->d_secsize = 512; 277 lp->d_nsectors = sl->sl_nsectors; 278 lp->d_ntracks = sl->sl_ntracks; 279 lp->d_ncylinders = sl->sl_ncylinders; 280 281 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 282 lp->d_secpercyl = secpercyl; 283 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 284 285 lp->d_sparespercyl = sl->sl_sparespercyl; 286 lp->d_acylinders = sl->sl_acylinders; 287 lp->d_rpm = sl->sl_rpm; 288 lp->d_interleave = sl->sl_interleave; 289 290 lp->d_npartitions = 8; 291 /* These are as defined in <ufs/ffs/fs.h> */ 292 lp->d_bbsize = 8192; /* XXX */ 293 lp->d_sbsize = 8192; /* XXX */ 294 295 for (i = 0; i < 8; i++) { 296 spp = &sl->sl_part[i]; 297 npp = &lp->d_partitions[i]; 298 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 299 npp->p_size = spp->sdkp_nsectors; 300 DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size)); 301 if (npp->p_size == 0) { 302 npp->p_fstype = FS_UNUSED; 303 } else { 304 npp->p_fstype = sun_fstypes[i]; 305 if (npp->p_fstype == FS_BSDFFS) { 306 /* 307 * The sun label does not store the FFS fields, 308 * so just set them with default values here. 309 */ 310 npp->p_fsize = 1024; 311 npp->p_frag = 8; 312 npp->p_cpg = 16; 313 } 314 } 315 } 316 317 lp->d_checksum = 0; 318 lp->d_checksum = dkcksum(lp); 319 DPRINTF(("disklabel_sun_to_bsd: success!\n")); 320 return (NULL); 321 } 322 323 /* 324 * Find a valid disklabel. 325 */ 326 static char * 327 search_label(struct of_dev *devp, u_long off, char *buf, 328 struct disklabel *lp, u_long off0) 329 { 330 size_t read; 331 struct mbr_partition *p; 332 int i; 333 u_long poff; 334 static int recursion; 335 336 struct disklabel *dlp; 337 struct sun_disklabel *slp; 338 int error; 339 340 /* minimal requirements for archtypal disk label */ 341 if (lp->d_secperunit == 0) 342 lp->d_secperunit = 0x1fffffff; 343 lp->d_npartitions = 1; 344 if (lp->d_partitions[0].p_size == 0) 345 lp->d_partitions[0].p_size = 0x1fffffff; 346 lp->d_partitions[0].p_offset = 0; 347 348 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 349 || read != DEV_BSIZE) 350 return ("Cannot read label"); 351 /* Check for a NetBSD disk label. */ 352 dlp = (struct disklabel *) (buf + LABELOFFSET); 353 if (dlp->d_magic == DISKMAGIC) { 354 if (dkcksum(dlp)) 355 return ("NetBSD disk label corrupted"); 356 *lp = *dlp; 357 DPRINTF(("search_label: found NetBSD label\n")); 358 return (NULL); 359 } 360 361 /* Check for a Sun disk label (for PROM compatibility). */ 362 slp = (struct sun_disklabel *) buf; 363 if (slp->sl_magic == SUN_DKMAGIC) 364 return (disklabel_sun_to_bsd(buf, lp)); 365 366 367 bzero(buf, sizeof(buf)); 368 return ("no disk label"); 369 } 370 371 int 372 devopen(struct open_file *of, const char *name, char **file) 373 { 374 char *cp; 375 char partition; 376 char fname[256], devname[256]; 377 union { 378 char buf[DEV_BSIZE]; 379 struct disklabel label; 380 } b; 381 struct disklabel label; 382 int handle, part, try = 0; 383 size_t read; 384 char *errmsg = NULL, *pp, savedpart = 0; 385 int error = 0; 386 387 if (ofdev.handle != -1) 388 panic("devopen"); 389 if (of->f_flags != F_READ) 390 return EPERM; 391 DPRINTF(("devopen: you want %s\n", name)); 392 strcpy(fname, name); 393 cp = filename(fname, &partition); 394 if (cp) { 395 strcpy(b.buf, cp); 396 *cp = 0; 397 } 398 if (!cp || !b.buf[0]) 399 strcpy(b.buf, DEFAULT_KERNEL); 400 if (!*fname) 401 strcpy(fname, bootdev); 402 strcpy(opened_name, fname); 403 if (partition) { 404 cp = opened_name + strlen(opened_name); 405 *cp++ = ':'; 406 *cp++ = partition; 407 *cp = 0; 408 } 409 *file = opened_name + strlen(opened_name); 410 if (b.buf[0] != '/') 411 strcat(opened_name, "/"); 412 strcat(opened_name, b.buf); 413 DPRINTF(("devopen: trying %s\n", fname)); 414 if ((handle = prom_finddevice(fname)) == -1) 415 return ENOENT; 416 DPRINTF(("devopen: found %s\n", fname)); 417 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 418 return ENXIO; 419 DPRINTF(("devopen: %s is called %s\n", fname, b.buf)); 420 floppyboot = !strcmp(b.buf, "floppy"); 421 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 422 return ENXIO; 423 DPRINTF(("devopen: %s is a %s device\n", fname, b.buf)); 424 if (!strcmp(b.buf, "block")) { 425 pp = strrchr(fname, ':'); 426 if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) { 427 savedpart = pp[1]; 428 } else { 429 savedpart = 'a'; 430 handle = prom_open(fname); 431 if (handle != -1) { 432 OF_instance_to_path(handle, devname, 433 sizeof(devname)); 434 DPRINTF(("real path: %s\n", devname)); 435 prom_close(handle); 436 pp = devname + strlen(devname); 437 if (pp > devname + 3) pp -= 2; 438 if (pp[0] == ':') 439 savedpart = pp[1]; 440 } 441 pp = fname + strlen(fname); 442 pp[0] = ':'; 443 pp[2] = '\0'; 444 } 445 pp[1] = 'c'; 446 DPRINTF(("devopen: replacing by whole disk device %s\n", 447 fname)); 448 if (savedpart) 449 partition = savedpart; 450 } 451 452 open_again: 453 DPRINTF(("devopen: opening %s\n", fname)); 454 if ((handle = prom_open(fname)) == -1) { 455 DPRINTF(("devopen: open of %s failed\n", fname)); 456 if (pp && savedpart) { 457 if (try == 0) { 458 pp[0] = '\0'; 459 try = 1; 460 } else { 461 pp[0] = ':'; 462 pp[1] = savedpart; 463 pp = NULL; 464 savedpart = '\0'; 465 } 466 goto open_again; 467 } 468 return ENXIO; 469 } 470 DPRINTF(("devopen: %s is now open\n", fname)); 471 bzero(&ofdev, sizeof ofdev); 472 ofdev.handle = handle; 473 if (!strcmp(b.buf, "block")) { 474 ofdev.type = OFDEV_DISK; 475 ofdev.bsize = DEV_BSIZE; 476 /* First try to find a disklabel without MBR partitions */ 477 DPRINTF(("devopen: trying to read disklabel\n")); 478 if (strategy(&ofdev, F_READ, 479 LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0 480 || read != DEV_BSIZE 481 || (errmsg = getdisklabel(b.buf, &label))) { 482 if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg); 483 /* Else try MBR partitions */ 484 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 485 if (errmsg) { 486 printf("devopen: search_label returned %s\n", errmsg); 487 error = ERDLAB; 488 } 489 if (error && error != ERDLAB) 490 goto bad; 491 } 492 493 if (error == ERDLAB) { 494 /* No, label, just use complete disk */ 495 ofdev.partoff = 0; 496 if (pp && savedpart) { 497 pp[1] = savedpart; 498 prom_close(handle); 499 if ((handle = prom_open(fname)) == -1) { 500 DPRINTF(("devopen: open of %s failed\n", 501 fname)); 502 return ENXIO; 503 } 504 ofdev.handle = handle; 505 DPRINTF(("devopen: back to original device %s\n", 506 fname)); 507 } 508 } else { 509 part = partition ? partition - 'a' : 0; 510 ofdev.partoff = label.d_partitions[part].p_offset; 511 DPRINTF(("devopen: setting partition %d offset %x\n", 512 part, ofdev.partoff)); 513 if (label.d_partitions[part].p_fstype == FS_RAID) { 514 ofdev.partoff += RF_PROTECTED_SECTORS; 515 DPRINTF(("devopen: found RAID partition, " 516 "adjusting offset to %x\n", ofdev.partoff)); 517 } 518 } 519 520 nfsys = 0; 521 of->f_dev = ofdevsw; 522 of->f_devdata = &ofdev; 523 #ifdef SPARC_BOOT_UFS 524 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 525 #endif 526 #ifdef SPARC_BOOT_CD9660 527 bcopy(&file_system_cd9660, &file_system[nfsys++], 528 sizeof file_system[0]); 529 #endif 530 DPRINTF(("devopen: return 0\n")); 531 return 0; 532 } 533 #ifdef NETBOOT 534 if (!strcmp(b.buf, "network")) { 535 if (error = net_open(&ofdev)) 536 goto bad; 537 538 ofdev.type = OFDEV_NET; 539 of->f_dev = ofdevsw; 540 of->f_devdata = NULL; 541 542 if (!strncmp(*file,"/tftp:",6)) { 543 *file += 6; 544 bcopy(&file_system_tftp, &file_system[0], sizeof file_system[0]); 545 if (net_tftp_bootp(&of->f_devdata)) { 546 net_close(&ofdev); 547 goto bad; 548 } 549 } else { 550 bcopy(&file_system_nfs, &file_system[0], sizeof file_system[0]); 551 if (error = net_mountroot()) { 552 net_close(&ofdev); 553 goto bad; 554 } 555 } 556 nfsys = 1; 557 return 0; 558 } 559 #endif 560 error = EFTYPE; 561 bad: 562 DPRINTF(("devopen: error %d, cannot open device\n", error)); 563 prom_close(handle); 564 ofdev.handle = -1; 565 return error; 566 } 567
Indexes created Thu Sep 25 16:09:42 GMT 2025