ofdev.c revision 1.21
1 /* $NetBSD: ofdev.c,v 1.21 2009/03/14 15:36:14 dsl 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/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(void *devdata, int rw, daddr_t blk, size_t size, void *buf, size_t *rsize) 131 { 132 struct of_dev *dev = devdata; 133 u_quad_t pos; 134 int n; 135 136 if (rw != F_READ) 137 return EPERM; 138 if (dev->type != OFDEV_DISK) 139 panic("strategy"); 140 141 #ifdef NON_DEBUG 142 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 143 (long)blk, (long)dev->partoff, (long)dev->bsize); 144 printf("strategy: seek position should be: %lx\n", 145 (long)((blk + dev->partoff) * dev->bsize)); 146 #endif 147 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 148 149 for (;;) { 150 #ifdef NON_DEBUG 151 printf("strategy: seeking to %lx\n", (long)pos); 152 #endif 153 if (prom_seek(dev->handle, pos) < 0) 154 break; 155 #ifdef NON_DEBUG 156 printf("strategy: reading %lx at %p\n", (long)size, buf); 157 #endif 158 n = prom_read(dev->handle, buf, size); 159 if (n == -2) 160 continue; 161 if (n < 0) 162 break; 163 *rsize = n; 164 return 0; 165 } 166 return EIO; 167 } 168 169 static int 170 devclose(struct open_file *of) 171 { 172 struct of_dev *op = of->f_devdata; 173 174 #ifdef NETBOOT 175 if (op->type == OFDEV_NET) 176 net_close(op); 177 #endif 178 prom_close(op->handle); 179 op->handle = -1; 180 } 181 182 static struct devsw ofdevsw[1] = { 183 "OpenFirmware", 184 strategy, 185 (int (*)(struct open_file *, ...))nodev, 186 devclose, 187 noioctl 188 }; 189 int ndevs = sizeof ofdevsw / sizeof ofdevsw[0]; 190 191 #ifdef SPARC_BOOT_UFS 192 static struct fs_ops file_system_ufs = FS_OPS(ufs); 193 #endif 194 #ifdef SPARC_BOOT_CD9660 195 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 196 #endif 197 #ifdef NETBOOT 198 static struct fs_ops file_system_nfs = FS_OPS(nfs); 199 static struct fs_ops file_system_tftp = FS_OPS(tftp); 200 #endif 201 202 struct fs_ops file_system[3]; 203 int nfsys; 204 205 static struct of_dev ofdev = { 206 -1, 207 }; 208 209 char opened_name[256]; 210 int floppyboot; 211 212 static u_long 213 get_long(const void *p) 214 { 215 const unsigned char *cp = p; 216 217 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 218 } 219 /************************************************************************ 220 * 221 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 222 * and then substantially rewritten by Gordon W. Ross 223 * 224 ************************************************************************/ 225 226 /* What partition types to assume for Sun disklabels: */ 227 static u_char 228 sun_fstypes[8] = { 229 FS_BSDFFS, /* a */ 230 FS_SWAP, /* b */ 231 FS_OTHER, /* c - whole disk */ 232 FS_BSDFFS, /* d */ 233 FS_BSDFFS, /* e */ 234 FS_BSDFFS, /* f */ 235 FS_BSDFFS, /* g */ 236 FS_BSDFFS, /* h */ 237 }; 238 239 /* 240 * Given a SunOS disk label, set lp to a BSD disk label. 241 * Returns NULL on success, else an error string. 242 * 243 * The BSD label is cleared out before this is called. 244 */ 245 static char * 246 disklabel_sun_to_bsd(char *cp, struct disklabel *lp) 247 { 248 struct sun_disklabel *sl; 249 struct partition *npp; 250 struct sun_dkpart *spp; 251 int i, secpercyl; 252 u_short cksum, *sp1, *sp2; 253 254 sl = (struct sun_disklabel *)cp; 255 256 /* Verify the XOR check. */ 257 sp1 = (u_short *)sl; 258 sp2 = (u_short *)(sl + 1); 259 cksum = 0; 260 while (sp1 < sp2) 261 cksum ^= *sp1++; 262 if (cksum != 0) 263 return("SunOS disk label, bad checksum"); 264 265 /* Format conversion. */ 266 lp->d_magic = DISKMAGIC; 267 lp->d_magic2 = DISKMAGIC; 268 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 269 270 lp->d_secsize = 512; 271 lp->d_nsectors = sl->sl_nsectors; 272 lp->d_ntracks = sl->sl_ntracks; 273 lp->d_ncylinders = sl->sl_ncylinders; 274 275 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 276 lp->d_secpercyl = secpercyl; 277 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 278 279 lp->d_sparespercyl = sl->sl_sparespercyl; 280 lp->d_acylinders = sl->sl_acylinders; 281 lp->d_rpm = sl->sl_rpm; 282 lp->d_interleave = sl->sl_interleave; 283 284 lp->d_npartitions = 8; 285 /* These are as defined in <ufs/ffs/fs.h> */ 286 lp->d_bbsize = 8192; /* XXX */ 287 lp->d_sbsize = 8192; /* XXX */ 288 289 for (i = 0; i < 8; i++) { 290 spp = &sl->sl_part[i]; 291 npp = &lp->d_partitions[i]; 292 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 293 npp->p_size = spp->sdkp_nsectors; 294 DPRINTF(("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size)); 295 if (npp->p_size == 0) { 296 npp->p_fstype = FS_UNUSED; 297 } else { 298 npp->p_fstype = sun_fstypes[i]; 299 if (npp->p_fstype == FS_BSDFFS) { 300 /* 301 * The sun label does not store the FFS fields, 302 * so just set them with default values here. 303 */ 304 npp->p_fsize = 1024; 305 npp->p_frag = 8; 306 npp->p_cpg = 16; 307 } 308 } 309 } 310 311 lp->d_checksum = 0; 312 lp->d_checksum = dkcksum(lp); 313 DPRINTF(("disklabel_sun_to_bsd: success!\n")); 314 return (NULL); 315 } 316 317 /* 318 * Find a valid disklabel. 319 */ 320 static char * 321 search_label(struct of_dev *devp, u_long off, char *buf, 322 struct disklabel *lp, u_long off0) 323 { 324 size_t read; 325 struct mbr_partition *p; 326 int i; 327 u_long poff; 328 static int recursion; 329 330 struct disklabel *dlp; 331 struct sun_disklabel *slp; 332 int error; 333 334 /* minimal requirements for archtypal disk label */ 335 if (lp->d_secperunit == 0) 336 lp->d_secperunit = 0x1fffffff; 337 lp->d_npartitions = 1; 338 if (lp->d_partitions[0].p_size == 0) 339 lp->d_partitions[0].p_size = 0x1fffffff; 340 lp->d_partitions[0].p_offset = 0; 341 342 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 343 || read != DEV_BSIZE) 344 return ("Cannot read label"); 345 /* Check for a NetBSD disk label. */ 346 dlp = (struct disklabel *) (buf + LABELOFFSET); 347 if (dlp->d_magic == DISKMAGIC) { 348 if (dkcksum(dlp)) 349 return ("NetBSD disk label corrupted"); 350 *lp = *dlp; 351 DPRINTF(("search_label: found NetBSD label\n")); 352 return (NULL); 353 } 354 355 /* Check for a Sun disk label (for PROM compatibility). */ 356 slp = (struct sun_disklabel *) buf; 357 if (slp->sl_magic == SUN_DKMAGIC) 358 return (disklabel_sun_to_bsd(buf, lp)); 359 360 361 bzero(buf, sizeof(buf)); 362 return ("no disk label"); 363 } 364 365 int 366 devopen(struct open_file *of, const char *name, char **file) 367 { 368 char *cp; 369 char partition; 370 char fname[256], devname[256]; 371 union { 372 char buf[DEV_BSIZE]; 373 struct disklabel label; 374 } b; 375 struct disklabel label; 376 int handle, part, try = 0; 377 size_t read; 378 char *errmsg = NULL, *pp, savedpart = 0; 379 int error = 0; 380 381 if (ofdev.handle != -1) 382 panic("devopen"); 383 if (of->f_flags != F_READ) 384 return EPERM; 385 DPRINTF(("devopen: you want %s\n", name)); 386 strcpy(fname, name); 387 cp = filename(fname, &partition); 388 if (cp) { 389 strcpy(b.buf, cp); 390 *cp = 0; 391 } 392 if (!cp || !b.buf[0]) 393 strcpy(b.buf, DEFAULT_KERNEL); 394 if (!*fname) 395 strcpy(fname, bootdev); 396 strcpy(opened_name, fname); 397 if (partition) { 398 cp = opened_name + strlen(opened_name); 399 *cp++ = ':'; 400 *cp++ = partition; 401 *cp = 0; 402 } 403 *file = opened_name + strlen(opened_name); 404 if (b.buf[0] != '/') 405 strcat(opened_name, "/"); 406 strcat(opened_name, b.buf); 407 DPRINTF(("devopen: trying %s\n", fname)); 408 if ((handle = prom_finddevice(fname)) == -1) 409 return ENOENT; 410 DPRINTF(("devopen: found %s\n", fname)); 411 if (_prom_getprop(handle, "name", b.buf, sizeof b.buf) < 0) 412 return ENXIO; 413 DPRINTF(("devopen: %s is called %s\n", fname, b.buf)); 414 floppyboot = !strcmp(b.buf, "floppy"); 415 if (_prom_getprop(handle, "device_type", b.buf, sizeof b.buf) < 0) 416 return ENXIO; 417 DPRINTF(("devopen: %s is a %s device\n", fname, b.buf)); 418 if (!strcmp(b.buf, "block")) { 419 pp = strrchr(fname, ':'); 420 if (pp && pp[1] >= 'a' && pp[1] <= 'f' && pp[2] == 0) { 421 savedpart = pp[1]; 422 } else { 423 savedpart = 'a'; 424 handle = prom_open(fname); 425 if (handle != -1) { 426 OF_instance_to_path(handle, devname, 427 sizeof(devname)); 428 DPRINTF(("real path: %s\n", devname)); 429 prom_close(handle); 430 pp = devname + strlen(devname); 431 if (pp > devname + 3) pp -= 2; 432 if (pp[0] == ':') 433 savedpart = pp[1]; 434 } 435 pp = fname + strlen(fname); 436 pp[0] = ':'; 437 pp[2] = '\0'; 438 } 439 pp[1] = 'c'; 440 DPRINTF(("devopen: replacing by whole disk device %s\n", 441 fname)); 442 if (savedpart) 443 partition = savedpart; 444 } 445 446 open_again: 447 DPRINTF(("devopen: opening %s\n", fname)); 448 if ((handle = prom_open(fname)) == -1) { 449 DPRINTF(("devopen: open of %s failed\n", fname)); 450 if (pp && savedpart) { 451 if (try == 0) { 452 pp[0] = '\0'; 453 try = 1; 454 } else { 455 pp[0] = ':'; 456 pp[1] = savedpart; 457 pp = NULL; 458 savedpart = '\0'; 459 } 460 goto open_again; 461 } 462 return ENXIO; 463 } 464 DPRINTF(("devopen: %s is now open\n", fname)); 465 bzero(&ofdev, sizeof ofdev); 466 ofdev.handle = handle; 467 if (!strcmp(b.buf, "block")) { 468 ofdev.type = OFDEV_DISK; 469 ofdev.bsize = DEV_BSIZE; 470 /* First try to find a disklabel without MBR partitions */ 471 DPRINTF(("devopen: trying to read disklabel\n")); 472 if (strategy(&ofdev, F_READ, 473 LABELSECTOR, DEV_BSIZE, b.buf, &read) != 0 474 || read != DEV_BSIZE 475 || (errmsg = getdisklabel(b.buf, &label))) { 476 if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg); 477 /* Else try MBR partitions */ 478 errmsg = search_label(&ofdev, 0, b.buf, &label, 0); 479 if (errmsg) { 480 printf("devopen: search_label returned %s\n", errmsg); 481 error = ERDLAB; 482 } 483 if (error && error != ERDLAB) 484 goto bad; 485 } 486 487 if (error == ERDLAB) { 488 /* No, label, just use complete disk */ 489 ofdev.partoff = 0; 490 if (pp && savedpart) { 491 pp[1] = savedpart; 492 prom_close(handle); 493 if ((handle = prom_open(fname)) == -1) { 494 DPRINTF(("devopen: open of %s failed\n", 495 fname)); 496 return ENXIO; 497 } 498 ofdev.handle = handle; 499 DPRINTF(("devopen: back to original device %s\n", 500 fname)); 501 } 502 } else { 503 part = partition ? partition - 'a' : 0; 504 ofdev.partoff = label.d_partitions[part].p_offset; 505 DPRINTF(("devopen: setting partition %d offset %x\n", 506 part, ofdev.partoff)); 507 if (label.d_partitions[part].p_fstype == FS_RAID) { 508 ofdev.partoff += RF_PROTECTED_SECTORS; 509 DPRINTF(("devopen: found RAID partition, " 510 "adjusting offset to %x\n", ofdev.partoff)); 511 } 512 } 513 514 nfsys = 0; 515 of->f_dev = ofdevsw; 516 of->f_devdata = &ofdev; 517 #ifdef SPARC_BOOT_UFS 518 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 519 #endif 520 #ifdef SPARC_BOOT_CD9660 521 bcopy(&file_system_cd9660, &file_system[nfsys++], 522 sizeof file_system[0]); 523 #endif 524 DPRINTF(("devopen: return 0\n")); 525 return 0; 526 } 527 #ifdef NETBOOT 528 if (!strcmp(b.buf, "network")) { 529 if (error = net_open(&ofdev)) 530 goto bad; 531 532 ofdev.type = OFDEV_NET; 533 of->f_dev = ofdevsw; 534 of->f_devdata = NULL; 535 536 if (!strncmp(*file,"/tftp:",6)) { 537 *file += 6; 538 bcopy(&file_system_tftp, &file_system[0], sizeof file_system[0]); 539 if (net_tftp_bootp(&of->f_devdata)) { 540 net_close(&ofdev); 541 goto bad; 542 } 543 } else { 544 bcopy(&file_system_nfs, &file_system[0], sizeof file_system[0]); 545 if (error = net_mountroot()) { 546 net_close(&ofdev); 547 goto bad; 548 } 549 } 550 nfsys = 1; 551 return 0; 552 } 553 #endif 554 error = EFTYPE; 555 bad: 556 DPRINTF(("devopen: error %d, cannot open device\n", error)); 557 prom_close(handle); 558 ofdev.handle = -1; 559 return error; 560 } 561
Indexes created Thu Sep 25 08:09:54 GMT 2025