ofdev.c revision 1.29
1 /* $NetBSD: ofdev.c,v 1.29 2011/05/20 14:49:54 he Exp $ */ 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/lfs.h> 45 #include <lib/libsa/cd9660.h> 46 #ifdef NETBOOT 47 #include <lib/libsa/nfs.h> 48 #include <lib/libsa/tftp.h> 49 #endif 50 #include <lib/libkern/libkern.h> 51 52 #include <dev/sun/disklabel.h> 53 #include <dev/raidframe/raidframevar.h> 54 55 #include <machine/promlib.h> 56 57 #include "ofdev.h" 58 #include "net.h" 59 #include "boot.h" 60 61 extern char bootdev[]; 62 extern bool root_fs_quickseekable; 63 64 /* 65 * This is ugly. A path on a sparc machine is something like this: 66 * 67 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 68 * 69 */ 70 71 char * 72 filename(char *str, char *ppart) 73 { 74 char *cp, *lp; 75 char savec; 76 int dhandle; 77 char devtype[16]; 78 79 lp = str; 80 devtype[0] = 0; 81 *ppart = '\0'; 82 for (cp = str; *cp; lp = cp) { 83 /* For each component of the path name... */ 84 while (*++cp && *cp != '/'); 85 savec = *cp; 86 *cp = 0; 87 /* ...look whether there is a device with this name */ 88 dhandle = prom_finddevice(str); 89 DPRINTF(("filename: prom_finddevice(%s) returned %x\n", 90 str, dhandle)); 91 *cp = savec; 92 if (dhandle == -1) { 93 /* 94 * if not, lp is the delimiter between device and 95 * path. if the last component was a block device. 96 */ 97 if (!strcmp(devtype, "block")) { 98 /* search for arguments */ 99 DPRINTF(("filename: hunting for arguments " 100 "in %s\n", lp)); 101 for (cp = lp; ; ) { 102 cp--; 103 if (cp < str || 104 cp[0] == '/' || 105 (cp[0] == ' ' && (cp+1) != lp && 106 cp[1] == '-')) 107 break; 108 } 109 if (cp >= str && *cp == '-') 110 /* found arguments, make firmware 111 ignore them */ 112 *cp = 0; 113 for (cp = lp; *--cp && *cp != ',' 114 && *cp != ':';) 115 ; 116 if (cp[0] == ':' && cp[1] >= 'a' && 117 cp[1] <= 'a' + MAXPARTITIONS) { 118 *ppart = cp[1]; 119 cp[0] = '\0'; 120 } 121 } 122 DPRINTF(("filename: found %s\n",lp)); 123 return lp; 124 } else if (_prom_getprop(dhandle, "device_type", devtype, 125 sizeof devtype) < 0) 126 devtype[0] = 0; 127 } 128 DPRINTF(("filename: not found\n",lp)); 129 return 0; 130 } 131 132 static int 133 strategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, size_t *rsize) 134 { 135 struct of_dev *dev = devdata; 136 u_quad_t pos; 137 int n; 138 139 if (rw != F_READ) 140 return EPERM; 141 if (dev->type != OFDEV_DISK) 142 panic("strategy"); 143 144 #ifdef NON_DEBUG 145 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 146 (long)blk, (long)dev->partoff, (long)dev->bsize); 147 printf("strategy: seek position should be: %lx\n", 148 (long)((blk + dev->partoff) * dev->bsize)); 149 #endif 150 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 151 152 for (;;) { 153 #ifdef NON_DEBUG 154 printf("strategy: seeking to %lx\n", (long)pos); 155 #endif 156 if (prom_seek(dev->handle, pos) < 0) 157 break; 158 #ifdef NON_DEBUG 159 printf("strategy: reading %lx at %p\n", (long)size, buf); 160 #endif 161 n = prom_read(dev->handle, buf, size); 162 if (n == -2) 163 continue; 164 if (n < 0) 165 break; 166 *rsize = n; 167 return 0; 168 } 169 return EIO; 170 } 171 172 static int 173 devclose(struct open_file *of) 174 { 175 struct of_dev *op = of->f_devdata; 176 177 #ifdef NETBOOT 178 if (op->type == OFDEV_NET) 179 net_close(op); 180 #endif 181 prom_close(op->handle); 182 op->handle = -1; 183 } 184 185 static struct devsw ofdevsw[1] = { 186 "OpenFirmware", 187 strategy, 188 (int (*)(struct open_file *, ...))nodev, 189 devclose, 190 noioctl 191 }; 192 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 193 194 195 #ifdef SPARC_BOOT_UFS 196 static struct fs_ops file_system_ufs[] = 197 { FS_OPS(ufs), FS_OPS(ffsv2), FS_OPS(lfsv1), FS_OPS(lfsv2) }; 198 #endif 199 #ifdef SPARC_BOOT_CD9660 200 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 201 #endif 202 #ifdef NETBOOT 203 static struct fs_ops file_system_nfs = FS_OPS(nfs); 204 static struct fs_ops file_system_tftp = FS_OPS(tftp); 205 #endif 206 207 struct fs_ops file_system[7]; 208 int nfsys; 209 210 static struct of_dev ofdev = { 211 -1, 212 }; 213 214 char opened_name[256]; 215 int floppyboot; 216 217 static u_long 218 get_long(const void *p) 219 { 220 const unsigned char *cp = p; 221 222 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 223 } 224 /************************************************************************ 225 * 226 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 227 * and then substantially rewritten by Gordon W. Ross 228 * 229 ************************************************************************/ 230 231 /* What partition types to assume for Sun disklabels: */ 232 static u_char 233 sun_fstypes[8] = { 234 FS_BSDFFS, /* a */ 235 FS_SWAP, /* b */ 236 FS_OTHER, /* c - whole disk */ 237 FS_BSDFFS, /* d */ 238 FS_BSDFFS, /* e */ 239 FS_BSDFFS, /* f */ 240 FS_BSDFFS, /* g */ 241 FS_BSDFFS, /* h */ 242 }; 243 244 /* 245 * Given a SunOS disk label, set lp to a BSD disk label. 246 * Returns NULL on success, else an error string. 247 * 248 * The BSD label is cleared out before this is called. 249 */ 250 static char * 251 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 252 { 253 struct sun_disklabel *sl; 254 struct partition *npp; 255 struct sun_dkpart *spp; 256 int i, secpercyl; 257 u_short cksum, *sp1, *sp2; 258 259 sl = (struct sun_disklabel *)cp; 260 261 /* Verify the XOR check. */ 262 sp1 = (u_short *)sl; 263 sp2 = (u_short *)(sl + 1); 264 cksum = 0; 265 while (sp1 < sp2) 266 cksum ^= *sp1++; 267 if (cksum != 0) 268 return("SunOS disk label, bad checksum"); 269 270 /* Format conversion. */ 271 lp->d_magic = DISKMAGIC; 272 lp->d_magic2 = DISKMAGIC; 273 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 274 275 lp->d_secsize = 512; 276 lp->d_nsectors = sl->sl_nsectors; 277 lp->d_ntracks = sl->sl_ntracks; 278 lp->d_ncylinders = sl->sl_ncylinders; 279 280 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 281 lp->d_secpercyl = secpercyl; 282 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 283 284 lp->d_sparespercyl = sl->sl_sparespercyl; 285 lp->d_acylinders = sl->sl_acylinders; 286 lp->d_rpm = sl->sl_rpm; 287 lp->d_interleave = sl->sl_interleave; 288 289 lp->d_npartitions = 8; 290 /* These are as defined in <ufs/ffs/fs.h> */ 291 lp->d_bbsize = 8192; /* XXX */ 292 lp->d_sbsize = 8192; /* XXX */ 293 294 for (i = 0; i < 8; i++) { 295 spp = &sl->sl_part[i]; 296 npp = &lp->d_partitions[i]; 297 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 298 npp->p_size = spp->sdkp_nsectors; 299 DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size)); 300 if (npp->p_size == 0) { 301 npp->p_fstype = FS_UNUSED; 302 } else { 303 npp->p_fstype = sun_fstypes[i]; 304 if (npp->p_fstype == FS_BSDFFS) { 305 /* 306 * The sun label does not store the FFS fields, 307 * so just set them with default values here. 308 */ 309 npp->p_fsize = 1024; 310 npp->p_frag = 8; 311 npp->p_cpg = 16; 312 } 313 } 314 } 315 316 lp->d_checksum = 0; 317 lp->d_checksum = dkcksum(lp); 318 DPRINTF(("disklabel_sun_to_bsd: success!\n")); 319 return (NULL); 320 } 321 322 /* 323 * Find a valid disklabel. 324 */ 325 static char * 326 search_label(struct of_dev *devp, u_long off, char *buf, 327 struct disklabel *lp, u_long off0) 328 { 329 size_t read; 330 struct mbr_partition *p; 331 int i; 332 u_long poff; 333 static int recursion; 334 335 struct disklabel *dlp; 336 struct sun_disklabel *slp; 337 int error; 338 339 /* minimal requirements for archtypal disk label */ 340 if (lp->d_secperunit == 0) 341 lp->d_secperunit = 0x1fffffff; 342 lp->d_npartitions = 1; 343 if (lp->d_partitions[0].p_size == 0) 344 lp->d_partitions[0].p_size = 0x1fffffff; 345 lp->d_partitions[0].p_offset = 0; 346 347 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 348 || read != DEV_BSIZE) 349 return ("Cannot read label"); 350 /* Check for a NetBSD disk label. */ 351 dlp = (struct disklabel *) (buf + LABELOFFSET); 352 if (dlp->d_magic == DISKMAGIC) { 353 if (dkcksum(dlp)) 354 return ("NetBSD disk label corrupted"); 355 *lp = *dlp; 356 DPRINTF(("search_label: found NetBSD label\n")); 357 return (NULL); 358 } 359 360 /* Check for a Sun disk label (for PROM compatibility). */ 361 slp = (struct sun_disklabel *) buf; 362 if (slp->sl_magic == SUN_DKMAGIC) 363 return (disklabel_sun_to_bsd(buf, lp)); 364 365 366 memset(buf, 0, sizeof(buf)); 367 return ("no disk label"); 368 } 369 370 int 371 devopen(struct open_file *of, const char *name, char **file) 372 { 373 char *cp; 374 char partition; 375 char fname[256], devname[256]; 376 union { 377 char buf[DEV_BSIZE]; 378 struct disklabel label; 379 } b; 380 struct disklabel label; 381 int handle, part, try = 0; 382 size_t read; 383 char *errmsg = NULL, *pp, savedpart = 0; 384 int error = 0; 385 386 if (ofdev.handle != -1) 387 panic("devopen"); 388 if (of->f_flags != F_READ) 389 return EPERM; 390 DPRINTF(("devopen: you want %s\n", name)); 391 strcpy(fname, name); 392 cp = filename(fname, &partition); 393 if (cp) { 394 strcpy(b.buf, cp); 395 *cp = 0; 396 } 397 if (!cp || !b.buf[0]) 398 strcpy(b.buf, DEFAULT_KERNEL); 399 if (!*fname) 400 strcpy(fname, bootdev); 401 strcpy(opened_name, fname); 402 if (partition) { 403 cp = opened_name + strlen(opened_name); 404 *cp++ = ':'; 405 *cp++ = partition; 406 *cp = 0; 407 } 408 *file = opened_name + strlen(opened_name); 409 if (b.buf[0] != '/') 410 strcat(opened_name, "/"); 411 strcat(opened_name, b.buf); 412 DPRINTF(("devopen: trying %s\n", fname)); 413 if ((handle = prom_finddevice(fname)) == -1) 414 return ENOENT; 415 DPRINTF(("devopen: found %s\n", fname)); 416 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 417 return ENXIO; 418 DPRINTF(("devopen: %s is called %s\n", fname, b.buf)); 419 floppyboot = !strcmp(b.buf, "floppy"); 420 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 421 return ENXIO; 422 DPRINTF(("devopen: %s is a %s device\n", fname, b.buf)); 423 if (!strcmp(b.buf, "block")) { 424 pp = strrchr(fname, ':'); 425 if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) { 426 savedpart = pp[1]; 427 } else { 428 savedpart = 'a'; 429 handle = prom_open(fname); 430 if (handle != -1) { 431 OF_instance_to_path(handle, devname, 432 sizeof(devname)); 433 DPRINTF(("real path: %s\n", devname)); 434 prom_close(handle); 435 pp = devname + strlen(devname); 436 if (pp > devname + 3) pp -= 2; 437 if (pp[0] == ':') 438 savedpart = pp[1]; 439 } 440 pp = fname + strlen(fname); 441 pp[0] = ':'; 442 pp[2] = '\0'; 443 } 444 pp[1] = 'c'; 445 DPRINTF(("devopen: replacing by whole disk device %s\n", 446 fname)); 447 if (savedpart) 448 partition = savedpart; 449 } 450 451 open_again: 452 DPRINTF(("devopen: opening %s\n", fname)); 453 if ((handle = prom_open(fname)) == -1) { 454 DPRINTF(("devopen: open of %s failed\n", fname)); 455 if (pp && savedpart) { 456 if (try == 0) { 457 pp[0] = '\0'; 458 try = 1; 459 } else { 460 pp[0] = ':'; 461 pp[1] = savedpart; 462 pp = NULL; 463 savedpart = '\0'; 464 } 465 goto open_again; 466 } 467 return ENXIO; 468 } 469 DPRINTF(("devopen: %s is now open\n", fname)); 470 memset(&ofdev, 0, sizeof ofdev); 471 ofdev.handle = handle; 472 if (!strcmp(b.buf, "block")) { 473 ofdev.type = OFDEV_DISK; 474 ofdev.bsize = DEV_BSIZE; 475 /* First try to find a disklabel without MBR partitions */ 476 DPRINTF(("devopen: trying to read disklabel\n")); 477 if (strategy(&ofdev, F_READ, 478 LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0 479 || read != DEV_BSIZE 480 || (errmsg = getdisklabel(b.buf, &label))) { 481 if (errmsg) { 482 DPRINTF(("devopen: getdisklabel returned %s\n", 483 errmsg)); 484 } 485 /* Else try MBR partitions */ 486 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 487 if (errmsg) { 488 printf("devopen: search_label returned %s\n", errmsg); 489 error = ERDLAB; 490 } 491 if (error && error != ERDLAB) 492 goto bad; 493 } 494 495 if (error == ERDLAB) { 496 /* No, label, just use complete disk */ 497 ofdev.partoff = 0; 498 if (pp && savedpart) { 499 pp[1] = savedpart; 500 prom_close(handle); 501 if ((handle = prom_open(fname)) == -1) { 502 DPRINTF(("devopen: open of %s failed\n", 503 fname)); 504 return ENXIO; 505 } 506 ofdev.handle = handle; 507 DPRINTF(("devopen: back to original device %s\n", 508 fname)); 509 } 510 } else { 511 part = partition ? partition - 'a' : 0; 512 ofdev.partoff = label.d_partitions[part].p_offset; 513 DPRINTF(("devopen: setting partition %d offset %x\n", 514 part, ofdev.partoff)); 515 if (label.d_partitions[part].p_fstype == FS_RAID) { 516 ofdev.partoff += RF_PROTECTED_SECTORS; 517 DPRINTF(("devopen: found RAID partition, " 518 "adjusting offset to %x\n", ofdev.partoff)); 519 } 520 } 521 522 nfsys = 0; 523 of->f_dev = ofdevsw; 524 of->f_devdata = &ofdev; 525 #ifdef SPARC_BOOT_UFS 526 memcpy(&file_system[nfsys++], &file_system_ufs[0], sizeof file_system[0]); 527 memcpy(&file_system[nfsys++], &file_system_ufs[1], sizeof file_system[0]); 528 memcpy(&file_system[nfsys++], &file_system_ufs[2], sizeof file_system[0]); 529 memcpy(&file_system[nfsys++], &file_system_ufs[3], sizeof file_system[0]); 530 #endif 531 #ifdef SPARC_BOOT_CD9660 532 memcpy(&file_system[nfsys++], &file_system_cd9660, sizeof file_system[0]); 533 #endif 534 DPRINTF(("devopen: return 0\n")); 535 return 0; 536 } 537 #ifdef NETBOOT 538 if (!strcmp(b.buf, "network")) { 539 if (error = net_open(&ofdev)) 540 goto bad; 541 542 ofdev.type = OFDEV_NET; 543 of->f_dev = ofdevsw; 544 of->f_devdata = &ofdev; 545 546 if (!strncmp(*file,"/tftp:",6)) { 547 *file += 6; 548 memcpy(&file_system[0], &file_system_tftp, sizeof file_system[0]); 549 if (net_tftp_bootp((int**)&of->f_devdata)) { 550 net_close(&ofdev); 551 goto bad; 552 } 553 root_fs_quickseekable = false; 554 } else { 555 memcpy(&file_system[0], &file_system_nfs, sizeof file_system[0]); 556 if (error = net_mountroot()) { 557 net_close(&ofdev); 558 goto bad; 559 } 560 } 561 nfsys = 1; 562 return 0; 563 } 564 #endif 565 error = EFTYPE; 566 bad: 567 DPRINTF(("devopen: error %d, cannot open device\n", error)); 568 prom_close(handle); 569 ofdev.handle = -1; 570 return error; 571 } 572
Indexes created Thu Oct 02 07:10:07 GMT 2025