ofdev.c revision 1.2
1 /* $NetBSD: ofdev.c,v 1.2 2002/07/29 14:34:12 mrg 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 #endif 48 #include <lib/libkern/libkern.h> 49 50 #include <dev/sun/disklabel.h> 51 #include "ofdev.h" 52 53 extern char bootdev[]; 54 55 #define RF_PROTECTED_SECTORS 64 /* XXX */ 56 57 /* 58 * This is ugly. A path on a sparc machine is something like this: 59 * 60 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 61 * 62 */ 63 64 static char * 65 filename(str, ppart) 66 char *str; 67 char *ppart; 68 { 69 char *cp, *lp; 70 char savec; 71 int dhandle; 72 char devtype[16]; 73 74 lp = str; 75 devtype[0] = 0; 76 *ppart = 0; 77 for (cp = str; *cp; lp = cp) { 78 /* For each component of the path name... */ 79 while (*++cp && *cp != '/'); 80 savec = *cp; 81 *cp = 0; 82 /* ...look whether there is a device with this name */ 83 dhandle = OF_finddevice(str); 84 #ifdef NOTDEF_DEBUG 85 printf("filename: OF_finddevice(%s) sez %x\n", 86 str, dhandle); 87 #endif 88 *cp = savec; 89 if (dhandle == -1) { 90 /* if not, lp is the delimiter between device and path */ 91 /* if the last component was a block device... */ 92 if (!strcmp(devtype, "block")) { 93 /* search for arguments */ 94 #ifdef NOTDEF_DEBUG 95 printf("filename: hunting for arguments in %s\n", str); 96 #endif 97 for (cp = lp; 98 --cp >= str && *cp != '/' && *cp != '-';); 99 if (cp >= str && *cp == '-') { 100 /* found arguments, make firmware ignore them */ 101 *cp = 0; 102 for (cp = lp; *--cp && *cp != ',';); 103 if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS) 104 *ppart = *cp; 105 } 106 } 107 #ifdef NOTDEF_DEBUG 108 printf("filename: found %s\n",lp); 109 #endif 110 return lp; 111 } else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0) 112 devtype[0] = 0; 113 } 114 #ifdef NOTDEF_DEBUG 115 printf("filename: not found\n",lp); 116 #endif 117 return 0; 118 } 119 120 static int 121 strategy(devdata, rw, blk, size, buf, rsize) 122 void *devdata; 123 int rw; 124 daddr_t blk; 125 size_t size; 126 void *buf; 127 size_t *rsize; 128 { 129 struct of_dev *dev = devdata; 130 u_quad_t pos; 131 int n; 132 133 if (rw != F_READ) 134 return EPERM; 135 if (dev->type != OFDEV_DISK) 136 panic("strategy"); 137 138 #ifdef NON_DEBUG 139 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 140 (long)blk, (long)dev->partoff, (long)dev->bsize); 141 printf("strategy: seek position should be: %lx\n", 142 (long)((blk + dev->partoff) * dev->bsize)); 143 #endif 144 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 145 146 for (;;) { 147 #ifdef NON_DEBUG 148 printf("strategy: seeking to %lx\n", (long)pos); 149 #endif 150 if (OF_seek(dev->handle, pos) < 0) 151 break; 152 #ifdef NON_DEBUG 153 printf("strategy: reading %lx at %p\n", (long)size, buf); 154 #endif 155 n = OF_read(dev->handle, buf, size); 156 if (n == -2) 157 continue; 158 if (n < 0) 159 break; 160 *rsize = n; 161 return 0; 162 } 163 return EIO; 164 } 165 166 static int 167 devclose(of) 168 struct open_file *of; 169 { 170 struct of_dev *op = of->f_devdata; 171 172 #ifdef NETBOOT 173 if (op->type == OFDEV_NET) 174 net_close(op); 175 #endif 176 OF_close(op->handle); 177 op->handle = -1; 178 } 179 180 static struct devsw devsw[1] = { 181 "OpenFirmware", 182 strategy, 183 (int (*)__P((struct open_file *, ...)))nodev, 184 devclose, 185 noioctl 186 }; 187 int ndevs = sizeof devsw / sizeof devsw[0]; 188 189 #ifdef SPARC_BOOT_UFS 190 static struct fs_ops file_system_ufs = { 191 ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat 192 }; 193 #endif 194 #ifdef SPARC_BOOT_HSFS 195 static struct fs_ops file_system_cd9660 = { 196 cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek, 197 cd9660_stat 198 }; 199 #endif 200 #ifdef NETBOOT 201 static struct fs_ops file_system_nfs = { 202 nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat 203 }; 204 #endif 205 206 struct fs_ops file_system[3]; 207 int nfsys; 208 209 static struct of_dev ofdev = { 210 -1, 211 }; 212 213 char opened_name[256]; 214 int floppyboot; 215 216 static u_long 217 get_long(p) 218 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(cp, lp) 252 char *cp; 253 struct disklabel *lp; 254 { 255 struct sun_disklabel *sl; 256 struct partition *npp; 257 struct sun_dkpart *spp; 258 int i, secpercyl; 259 u_short cksum, *sp1, *sp2; 260 261 sl = (struct sun_disklabel *)cp; 262 263 /* Verify the XOR check. */ 264 sp1 = (u_short *)sl; 265 sp2 = (u_short *)(sl + 1); 266 cksum = 0; 267 while (sp1 < sp2) 268 cksum ^= *sp1++; 269 if (cksum != 0) 270 return("SunOS disk label, bad checksum"); 271 272 /* Format conversion. */ 273 lp->d_magic = DISKMAGIC; 274 lp->d_magic2 = DISKMAGIC; 275 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 276 277 lp->d_secsize = 512; 278 lp->d_nsectors = sl->sl_nsectors; 279 lp->d_ntracks = sl->sl_ntracks; 280 lp->d_ncylinders = sl->sl_ncylinders; 281 282 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 283 lp->d_secpercyl = secpercyl; 284 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 285 286 lp->d_sparespercyl = sl->sl_sparespercyl; 287 lp->d_acylinders = sl->sl_acylinders; 288 lp->d_rpm = sl->sl_rpm; 289 lp->d_interleave = sl->sl_interleave; 290 291 lp->d_npartitions = 8; 292 /* These are as defined in <ufs/ffs/fs.h> */ 293 lp->d_bbsize = 8192; /* XXX */ 294 lp->d_sbsize = 8192; /* XXX */ 295 296 for (i = 0; i < 8; i++) { 297 spp = &sl->sl_part[i]; 298 npp = &lp->d_partitions[i]; 299 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 300 npp->p_size = spp->sdkp_nsectors; 301 #ifdef NOTDEF_DEBUG 302 printf("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size); 303 #endif 304 if (npp->p_size == 0) { 305 npp->p_fstype = FS_UNUSED; 306 } else { 307 npp->p_fstype = sun_fstypes[i]; 308 if (npp->p_fstype == FS_BSDFFS) { 309 /* 310 * The sun label does not store the FFS fields, 311 * so just set them with default values here. 312 */ 313 npp->p_fsize = 1024; 314 npp->p_frag = 8; 315 npp->p_cpg = 16; 316 } 317 } 318 } 319 320 lp->d_checksum = 0; 321 lp->d_checksum = dkcksum(lp); 322 #ifdef NOTDEF_DEBUG 323 printf("disklabel_sun_to_bsd: success!\n"); 324 #endif 325 return (NULL); 326 } 327 328 /* 329 * Find a valid disklabel. 330 */ 331 static char * 332 search_label(devp, off, buf, lp, off0) 333 struct of_dev *devp; 334 u_long off; 335 char *buf; 336 struct disklabel *lp; 337 u_long off0; 338 { 339 size_t read; 340 struct mbr_partition *p; 341 int i; 342 u_long poff; 343 static int recursion; 344 345 struct disklabel *dlp; 346 struct sun_disklabel *slp; 347 int error; 348 349 /* minimal requirements for archtypal disk label */ 350 if (lp->d_secperunit == 0) 351 lp->d_secperunit = 0x1fffffff; 352 lp->d_npartitions = 1; 353 if (lp->d_partitions[0].p_size == 0) 354 lp->d_partitions[0].p_size = 0x1fffffff; 355 lp->d_partitions[0].p_offset = 0; 356 357 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 358 || read != DEV_BSIZE) 359 return ("Cannot read label"); 360 /* Check for a NetBSD disk label. */ 361 dlp = (struct disklabel *) (buf + LABELOFFSET); 362 if (dlp->d_magic == DISKMAGIC) { 363 if (dkcksum(dlp)) 364 return ("NetBSD disk label corrupted"); 365 *lp = *dlp; 366 #ifdef NOTDEF_DEBUG 367 printf("search_label: found NetBSD label\n"); 368 #endif 369 return (NULL); 370 } 371 372 /* Check for a Sun disk label (for PROM compatibility). */ 373 slp = (struct sun_disklabel *) buf; 374 if (slp->sl_magic == SUN_DKMAGIC) 375 return (disklabel_sun_to_bsd(buf, lp)); 376 377 378 bzero(buf, sizeof(buf)); 379 return ("no disk label"); 380 } 381 382 int 383 devopen(of, name, file) 384 struct open_file *of; 385 const char *name; 386 char **file; 387 { 388 char *cp; 389 char partition; 390 char fname[256]; 391 char buf[DEV_BSIZE]; 392 struct disklabel label; 393 int handle, part; 394 size_t read; 395 char *errmsg = NULL; 396 int error = 0; 397 398 if (ofdev.handle != -1) 399 panic("devopen"); 400 if (of->f_flags != F_READ) 401 return EPERM; 402 #ifdef NOTDEF_DEBUG 403 printf("devopen: you want %s\n", name); 404 #endif 405 strcpy(fname, name); 406 cp = filename(fname, &partition); 407 if (cp) { 408 strcpy(buf, cp); 409 *cp = 0; 410 } 411 if (!cp || !*buf) 412 strcpy(buf, DEFAULT_KERNEL); 413 if (!*fname) 414 strcpy(fname, bootdev); 415 strcpy(opened_name, fname); 416 if (partition) { 417 cp = opened_name + strlen(opened_name); 418 *cp++ = ':'; 419 *cp++ = partition; 420 *cp = 0; 421 } 422 if (*buf != '/') 423 strcat(opened_name, "/"); 424 strcat(opened_name, buf); 425 *file = opened_name + strlen(fname) + 1; 426 #ifdef NOTDEF_DEBUG 427 printf("devopen: trying %s\n", fname); 428 #endif 429 if ((handle = OF_finddevice(fname)) == -1) 430 return ENOENT; 431 #ifdef NOTDEF_DEBUG 432 printf("devopen: found %s\n", fname); 433 #endif 434 if (OF_getprop(handle, "name", buf, sizeof buf) < 0) 435 return ENXIO; 436 #ifdef NOTDEF_DEBUG 437 printf("devopen: %s is called %s\n", fname, buf); 438 #endif 439 floppyboot = !strcmp(buf, "floppy"); 440 if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0) 441 return ENXIO; 442 #ifdef NOTDEF_DEBUG 443 printf("devopen: %s is a %s device\n", fname, buf); 444 #endif 445 #ifdef NOTDEF_DEBUG 446 printf("devopen: opening %s\n", fname); 447 #endif 448 if ((handle = OF_open(fname)) == -1) { 449 #ifdef NOTDEF_DEBUG 450 printf("devopen: open of %s failed\n", fname); 451 #endif 452 return ENXIO; 453 } 454 #ifdef NOTDEF_DEBUG 455 printf("devopen: %s is now open\n", fname); 456 #endif 457 bzero(&ofdev, sizeof ofdev); 458 ofdev.handle = handle; 459 if (!strcmp(buf, "block")) { 460 ofdev.type = OFDEV_DISK; 461 ofdev.bsize = DEV_BSIZE; 462 /* First try to find a disklabel without MBR partitions */ 463 #ifdef NOTDEF_DEBUG 464 printf("devopen: trying to read disklabel\n"); 465 #endif 466 if (strategy(&ofdev, F_READ, 467 LABELSECTOR, DEV_BSIZE, buf, &read) != 0 468 || read != DEV_BSIZE 469 || (errmsg = getdisklabel(buf, &label))) { 470 if (errmsg) printf("devopen: getdisklabel sez %s\n", errmsg); 471 /* Else try MBR partitions */ 472 errmsg = search_label(&ofdev, 0, buf, &label, 0); 473 if (errmsg) { 474 printf("devopen: search_label sez %s\n", errmsg); 475 error = ERDLAB; 476 } 477 if (error && error != ERDLAB) 478 goto bad; 479 } 480 481 if (error == ERDLAB) { 482 if (partition) 483 /* User specified a parititon, but there is none */ 484 goto bad; 485 /* No, label, just use complete disk */ 486 ofdev.partoff = 0; 487 } else { 488 part = partition ? partition - 'a' : 0; 489 ofdev.partoff = label.d_partitions[part].p_offset; 490 #ifdef NOTDEF_DEBUG 491 printf("devopen: setting partition %d offset %x\n", 492 part, ofdev.partoff); 493 #endif 494 if (label.d_partitions[part].p_fstype == FS_RAID) { 495 ofdev.partoff += RF_PROTECTED_SECTORS; 496 #ifdef NOTDEF_DEBUG 497 printf("devopen: found RAID partition, " 498 "adjusting offset to %x", ofdev.partoff); 499 #endif 500 } 501 } 502 503 of->f_dev = devsw; 504 of->f_devdata = &ofdev; 505 #ifdef SPARC_BOOT_UFS 506 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 507 #endif 508 #ifdef SPARC_BOOT_HSFS 509 bcopy(&file_system_cd9660, &file_system[nfsys++], 510 sizeof file_system[0]); 511 #endif 512 #ifdef NOTDEF_DEBUG 513 printf("devopen: return 0\n"); 514 #endif 515 return 0; 516 } 517 #ifdef NETBOOT 518 if (!strcmp(buf, "network")) { 519 ofdev.type = OFDEV_NET; 520 of->f_dev = devsw; 521 of->f_devdata = &ofdev; 522 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 523 nfsys = 1; 524 if (error = net_open(&ofdev)) 525 goto bad; 526 return 0; 527 } 528 #endif 529 error = EFTYPE; 530 bad: 531 #ifdef NOTDEF_DEBUG 532 printf("devopen: error %d, cannot open device\n", error); 533 #endif 534 OF_close(handle); 535 ofdev.handle = -1; 536 return error; 537 } 538
Indexes created Wed Sep 24 05:09:52 GMT 2025