ofdev.c revision 1.8
1 /* $NetBSD: ofdev.c,v 1.8 2005/06/23 19:44:01 junyoung 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 <dev/raidframe/raidframevar.h> 52 53 #include "ofdev.h" 54 55 extern char bootdev[]; 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) returned %x\n", 86 str, dhandle); 87 #endif 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 #ifdef NOTDEF_DEBUG 97 printf("filename: hunting for arguments " 98 "in %s\n", str); 99 #endif 100 for (cp = lp; ; ) { 101 cp--; 102 if (cp < str || 103 cp[0] == '/' || 104 (cp[0] == ' ' && (cp+1) != lp && 105 cp[1] == '-')) 106 break; 107 } 108 if (cp >= str && *cp == '-') 109 *cp = 0; /* found arguments, make firmware ignore them */ 110 for (cp = lp; *--cp && *cp != ',' && *cp != ':';); 111 if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS) { 112 *ppart = *cp; 113 *--cp = '\0'; 114 } 115 } 116 #ifdef NOTDEF_DEBUG 117 printf("filename: found %s\n",lp); 118 #endif 119 return lp; 120 } else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0) 121 devtype[0] = 0; 122 } 123 #ifdef NOTDEF_DEBUG 124 printf("filename: not found\n",lp); 125 #endif 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 (OF_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 = OF_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(of) 177 struct open_file *of; 178 { 179 struct of_dev *op = of->f_devdata; 180 181 #ifdef NETBOOT 182 if (op->type == OFDEV_NET) 183 net_close(op); 184 #endif 185 OF_close(op->handle); 186 op->handle = -1; 187 } 188 189 static struct devsw devsw[1] = { 190 "OpenFirmware", 191 strategy, 192 (int (*)__P((struct open_file *, ...)))nodev, 193 devclose, 194 noioctl 195 }; 196 int ndevs = sizeof devsw / sizeof devsw[0]; 197 198 #ifdef SPARC_BOOT_UFS 199 static struct fs_ops file_system_ufs = FS_OPS(ufs); 200 #endif 201 #ifdef SPARC_BOOT_HSFS 202 static struct fs_ops file_system_cd9660 = FS_OPS(cd9660); 203 #endif 204 #ifdef NETBOOT 205 static struct fs_ops file_system_nfs = FS_OPS(nfs); 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(p) 220 const void *p; 221 { 222 const unsigned char *cp = p; 223 224 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 225 } 226 /************************************************************************ 227 * 228 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 229 * and then substantially rewritten by Gordon W. Ross 230 * 231 ************************************************************************/ 232 233 /* What partition types to assume for Sun disklabels: */ 234 static u_char 235 sun_fstypes[8] = { 236 FS_BSDFFS, /* a */ 237 FS_SWAP, /* b */ 238 FS_OTHER, /* c - whole disk */ 239 FS_BSDFFS, /* d */ 240 FS_BSDFFS, /* e */ 241 FS_BSDFFS, /* f */ 242 FS_BSDFFS, /* g */ 243 FS_BSDFFS, /* h */ 244 }; 245 246 /* 247 * Given a SunOS disk label, set lp to a BSD disk label. 248 * Returns NULL on success, else an error string. 249 * 250 * The BSD label is cleared out before this is called. 251 */ 252 static char * 253 disklabel_sun_to_bsd(cp, lp) 254 char *cp; 255 struct disklabel *lp; 256 { 257 struct sun_disklabel *sl; 258 struct partition *npp; 259 struct sun_dkpart *spp; 260 int i, secpercyl; 261 u_short cksum, *sp1, *sp2; 262 263 sl = (struct sun_disklabel *)cp; 264 265 /* Verify the XOR check. */ 266 sp1 = (u_short *)sl; 267 sp2 = (u_short *)(sl + 1); 268 cksum = 0; 269 while (sp1 < sp2) 270 cksum ^= *sp1++; 271 if (cksum != 0) 272 return("SunOS disk label, bad checksum"); 273 274 /* Format conversion. */ 275 lp->d_magic = DISKMAGIC; 276 lp->d_magic2 = DISKMAGIC; 277 memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname)); 278 279 lp->d_secsize = 512; 280 lp->d_nsectors = sl->sl_nsectors; 281 lp->d_ntracks = sl->sl_ntracks; 282 lp->d_ncylinders = sl->sl_ncylinders; 283 284 secpercyl = sl->sl_nsectors * sl->sl_ntracks; 285 lp->d_secpercyl = secpercyl; 286 lp->d_secperunit = secpercyl * sl->sl_ncylinders; 287 288 lp->d_sparespercyl = sl->sl_sparespercyl; 289 lp->d_acylinders = sl->sl_acylinders; 290 lp->d_rpm = sl->sl_rpm; 291 lp->d_interleave = sl->sl_interleave; 292 293 lp->d_npartitions = 8; 294 /* These are as defined in <ufs/ffs/fs.h> */ 295 lp->d_bbsize = 8192; /* XXX */ 296 lp->d_sbsize = 8192; /* XXX */ 297 298 for (i = 0; i < 8; i++) { 299 spp = &sl->sl_part[i]; 300 npp = &lp->d_partitions[i]; 301 npp->p_offset = spp->sdkp_cyloffset * secpercyl; 302 npp->p_size = spp->sdkp_nsectors; 303 #ifdef NOTDEF_DEBUG 304 printf("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size); 305 #endif 306 if (npp->p_size == 0) { 307 npp->p_fstype = FS_UNUSED; 308 } else { 309 npp->p_fstype = sun_fstypes[i]; 310 if (npp->p_fstype == FS_BSDFFS) { 311 /* 312 * The sun label does not store the FFS fields, 313 * so just set them with default values here. 314 */ 315 npp->p_fsize = 1024; 316 npp->p_frag = 8; 317 npp->p_cpg = 16; 318 } 319 } 320 } 321 322 lp->d_checksum = 0; 323 lp->d_checksum = dkcksum(lp); 324 #ifdef NOTDEF_DEBUG 325 printf("disklabel_sun_to_bsd: success!\n"); 326 #endif 327 return (NULL); 328 } 329 330 /* 331 * Find a valid disklabel. 332 */ 333 static char * 334 search_label(devp, off, buf, lp, off0) 335 struct of_dev *devp; 336 u_long off; 337 char *buf; 338 struct disklabel *lp; 339 u_long off0; 340 { 341 size_t read; 342 struct mbr_partition *p; 343 int i; 344 u_long poff; 345 static int recursion; 346 347 struct disklabel *dlp; 348 struct sun_disklabel *slp; 349 int error; 350 351 /* minimal requirements for archtypal disk label */ 352 if (lp->d_secperunit == 0) 353 lp->d_secperunit = 0x1fffffff; 354 lp->d_npartitions = 1; 355 if (lp->d_partitions[0].p_size == 0) 356 lp->d_partitions[0].p_size = 0x1fffffff; 357 lp->d_partitions[0].p_offset = 0; 358 359 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 360 || read != DEV_BSIZE) 361 return ("Cannot read label"); 362 /* Check for a NetBSD disk label. */ 363 dlp = (struct disklabel *) (buf + LABELOFFSET); 364 if (dlp->d_magic == DISKMAGIC) { 365 if (dkcksum(dlp)) 366 return ("NetBSD disk label corrupted"); 367 *lp = *dlp; 368 #ifdef NOTDEF_DEBUG 369 printf("search_label: found NetBSD label\n"); 370 #endif 371 return (NULL); 372 } 373 374 /* Check for a Sun disk label (for PROM compatibility). */ 375 slp = (struct sun_disklabel *) buf; 376 if (slp->sl_magic == SUN_DKMAGIC) 377 return (disklabel_sun_to_bsd(buf, lp)); 378 379 380 bzero(buf, sizeof(buf)); 381 return ("no disk label"); 382 } 383 384 int 385 devopen(of, name, file) 386 struct open_file *of; 387 const char *name; 388 char **file; 389 { 390 char *cp; 391 char partition; 392 char fname[256]; 393 char buf[DEV_BSIZE]; 394 struct disklabel label; 395 int handle, part; 396 size_t read; 397 char *errmsg = NULL; 398 int error = 0; 399 400 if (ofdev.handle != -1) 401 panic("devopen"); 402 if (of->f_flags != F_READ) 403 return EPERM; 404 #ifdef NOTDEF_DEBUG 405 printf("devopen: you want %s\n", name); 406 #endif 407 strcpy(fname, name); 408 cp = filename(fname, &partition); 409 if (cp) { 410 strcpy(buf, cp); 411 *cp = 0; 412 } 413 if (!cp || !*buf) 414 strcpy(buf, DEFAULT_KERNEL); 415 if (!*fname) 416 strcpy(fname, bootdev); 417 strcpy(opened_name, fname); 418 if (partition) { 419 cp = opened_name + strlen(opened_name); 420 *cp++ = ':'; 421 *cp++ = partition; 422 *cp = 0; 423 } 424 *file = opened_name + strlen(opened_name); 425 if (*buf != '/') 426 strcat(opened_name, "/"); 427 strcat(opened_name, buf); 428 #ifdef NOTDEF_DEBUG 429 printf("devopen: trying %s\n", fname); 430 #endif 431 if ((handle = OF_finddevice(fname)) == -1) 432 return ENOENT; 433 #ifdef NOTDEF_DEBUG 434 printf("devopen: found %s\n", fname); 435 #endif 436 if (OF_getprop(handle, "name", buf, sizeof buf) < 0) 437 return ENXIO; 438 #ifdef NOTDEF_DEBUG 439 printf("devopen: %s is called %s\n", fname, buf); 440 #endif 441 floppyboot = !strcmp(buf, "floppy"); 442 if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0) 443 return ENXIO; 444 #ifdef NOTDEF_DEBUG 445 printf("devopen: %s is a %s device\n", fname, buf); 446 #endif 447 #ifdef NOTDEF_DEBUG 448 printf("devopen: opening %s\n", fname); 449 #endif 450 if ((handle = OF_open(fname)) == -1) { 451 #ifdef NOTDEF_DEBUG 452 printf("devopen: open of %s failed\n", fname); 453 #endif 454 return ENXIO; 455 } 456 #ifdef NOTDEF_DEBUG 457 printf("devopen: %s is now open\n", fname); 458 #endif 459 bzero(&ofdev, sizeof ofdev); 460 ofdev.handle = handle; 461 if (!strcmp(buf, "block")) { 462 ofdev.type = OFDEV_DISK; 463 ofdev.bsize = DEV_BSIZE; 464 /* First try to find a disklabel without MBR partitions */ 465 #ifdef NOTDEF_DEBUG 466 printf("devopen: trying to read disklabel\n"); 467 #endif 468 if (strategy(&ofdev, F_READ, 469 LABELSECTOR, DEV_BSIZE, buf, &read) != 0 470 || read != DEV_BSIZE 471 || (errmsg = getdisklabel(buf, &label))) { 472 if (errmsg) printf("devopen: getdisklabel returned %s\n", errmsg); 473 /* Else try MBR partitions */ 474 errmsg = search_label(&ofdev, 0, buf, &label, 0); 475 if (errmsg) { 476 printf("devopen: search_label returned %s\n", errmsg); 477 error = ERDLAB; 478 } 479 if (error && error != ERDLAB) 480 goto bad; 481 } 482 483 if (error == ERDLAB) { 484 if (partition) 485 /* User specified a parititon, but there is none */ 486 goto bad; 487 /* No, label, just use complete disk */ 488 ofdev.partoff = 0; 489 } else { 490 part = partition ? partition - 'a' : 0; 491 ofdev.partoff = label.d_partitions[part].p_offset; 492 #ifdef NOTDEF_DEBUG 493 printf("devopen: setting partition %d offset %x\n", 494 part, ofdev.partoff); 495 #endif 496 if (label.d_partitions[part].p_fstype == FS_RAID) { 497 ofdev.partoff += RF_PROTECTED_SECTORS; 498 #ifdef NOTDEF_DEBUG 499 printf("devopen: found RAID partition, " 500 "adjusting offset to %x\n", ofdev.partoff); 501 #endif 502 } 503 } 504 505 of->f_dev = devsw; 506 of->f_devdata = &ofdev; 507 #ifdef SPARC_BOOT_UFS 508 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 509 #endif 510 #ifdef SPARC_BOOT_HSFS 511 bcopy(&file_system_cd9660, &file_system[nfsys++], 512 sizeof file_system[0]); 513 #endif 514 #ifdef NOTDEF_DEBUG 515 printf("devopen: return 0\n"); 516 #endif 517 return 0; 518 } 519 #ifdef NETBOOT 520 if (!strcmp(buf, "network")) { 521 ofdev.type = OFDEV_NET; 522 of->f_dev = devsw; 523 of->f_devdata = &ofdev; 524 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 525 nfsys = 1; 526 if (error = net_open(&ofdev)) 527 goto bad; 528 return 0; 529 } 530 #endif 531 error = EFTYPE; 532 bad: 533 #ifdef NOTDEF_DEBUG 534 printf("devopen: error %d, cannot open device\n", error); 535 #endif 536 OF_close(handle); 537 ofdev.handle = -1; 538 return error; 539 } 540
Indexes created Wed Sep 24 22:09:59 GMT 2025