ofdev.c revision 1.1
1 /* $NetBSD: ofdev.c,v 1.1 2000/08/20 14:58:41 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 /* 56 * This is ugly. A path on a sparc machine is something like this: 57 * 58 * [device] [-<options] [path] [-options] [otherstuff] [-<more options] 59 * 60 */ 61 62 static char * 63 filename(str, ppart) 64 char *str; 65 char *ppart; 66 { 67 char *cp, *lp; 68 char savec; 69 int dhandle; 70 char devtype[16]; 71 72 lp = str; 73 devtype[0] = 0; 74 *ppart = 0; 75 for (cp = str; *cp; lp = cp) { 76 /* For each component of the path name... */ 77 while (*++cp && *cp != '/'); 78 savec = *cp; 79 *cp = 0; 80 /* ...look whether there is a device with this name */ 81 dhandle = OF_finddevice(str); 82 #ifdef NOTDEF_DEBUG 83 printf("filename: OF_finddevice(%s) sez %x\n", 84 str, dhandle); 85 #endif 86 *cp = savec; 87 if (dhandle == -1) { 88 /* if not, lp is the delimiter between device and path */ 89 /* if the last component was a block device... */ 90 if (!strcmp(devtype, "block")) { 91 /* search for arguments */ 92 #ifdef NOTDEF_DEBUG 93 printf("filename: hunting for arguments in %s\n", str); 94 #endif 95 for (cp = lp; 96 --cp >= str && *cp != '/' && *cp != '-';); 97 if (cp >= str && *cp == '-') { 98 /* found arguments, make firmware ignore them */ 99 *cp = 0; 100 for (cp = lp; *--cp && *cp != ',';); 101 if (*++cp >= 'a' && *cp <= 'a' + MAXPARTITIONS) 102 *ppart = *cp; 103 } 104 } 105 #ifdef NOTDEF_DEBUG 106 printf("filename: found %s\n",lp); 107 #endif 108 return lp; 109 } else if (OF_getprop(dhandle, "device_type", devtype, sizeof devtype) < 0) 110 devtype[0] = 0; 111 } 112 #ifdef NOTDEF_DEBUG 113 printf("filename: not found\n",lp); 114 #endif 115 return 0; 116 } 117 118 static int 119 strategy(devdata, rw, blk, size, buf, rsize) 120 void *devdata; 121 int rw; 122 daddr_t blk; 123 size_t size; 124 void *buf; 125 size_t *rsize; 126 { 127 struct of_dev *dev = devdata; 128 u_quad_t pos; 129 int n; 130 131 if (rw != F_READ) 132 return EPERM; 133 if (dev->type != OFDEV_DISK) 134 panic("strategy"); 135 136 #ifdef NON_DEBUG 137 printf("strategy: block %lx, partition offset %lx, blksz %lx\n", 138 (long)blk, (long)dev->partoff, (long)dev->bsize); 139 printf("strategy: seek position should be: %lx\n", 140 (long)((blk + dev->partoff) * dev->bsize)); 141 #endif 142 pos = (u_quad_t)(blk + dev->partoff) * dev->bsize; 143 144 for (;;) { 145 #ifdef NON_DEBUG 146 printf("strategy: seeking to %lx\n", (long)pos); 147 #endif 148 if (OF_seek(dev->handle, pos) < 0) 149 break; 150 #ifdef NON_DEBUG 151 printf("strategy: reading %lx at %p\n", (long)size, buf); 152 #endif 153 n = OF_read(dev->handle, buf, size); 154 if (n == -2) 155 continue; 156 if (n < 0) 157 break; 158 *rsize = n; 159 return 0; 160 } 161 return EIO; 162 } 163 164 static int 165 devclose(of) 166 struct open_file *of; 167 { 168 struct of_dev *op = of->f_devdata; 169 170 #ifdef NETBOOT 171 if (op->type == OFDEV_NET) 172 net_close(op); 173 #endif 174 OF_close(op->handle); 175 op->handle = -1; 176 } 177 178 static struct devsw devsw[1] = { 179 "OpenFirmware", 180 strategy, 181 (int (*)__P((struct open_file *, ...)))nodev, 182 devclose, 183 noioctl 184 }; 185 int ndevs = sizeof devsw / sizeof devsw[0]; 186 187 #ifdef SPARC_BOOT_UFS 188 static struct fs_ops file_system_ufs = { 189 ufs_open, ufs_close, ufs_read, ufs_write, ufs_seek, ufs_stat 190 }; 191 #endif 192 #ifdef SPARC_BOOT_HSFS 193 static struct fs_ops file_system_cd9660 = { 194 cd9660_open, cd9660_close, cd9660_read, cd9660_write, cd9660_seek, 195 cd9660_stat 196 }; 197 #endif 198 #ifdef NETBOOT 199 static struct fs_ops file_system_nfs = { 200 nfs_open, nfs_close, nfs_read, nfs_write, nfs_seek, nfs_stat 201 }; 202 #endif 203 204 struct fs_ops file_system[3]; 205 int nfsys; 206 207 static struct of_dev ofdev = { 208 -1, 209 }; 210 211 char opened_name[256]; 212 int floppyboot; 213 214 static u_long 215 get_long(p) 216 const void *p; 217 { 218 const unsigned char *cp = p; 219 220 return cp[0] | (cp[1] << 8) | (cp[2] << 16) | (cp[3] << 24); 221 } 222 /************************************************************************ 223 * 224 * The rest of this was taken from arch/sparc64/scsi/sun_disklabel.c 225 * and then substantially rewritten by Gordon W. Ross 226 * 227 ************************************************************************/ 228 229 /* What partition types to assume for Sun disklabels: */ 230 static u_char 231 sun_fstypes[8] = { 232 FS_BSDFFS, /* a */ 233 FS_SWAP, /* b */ 234 FS_OTHER, /* c - whole disk */ 235 FS_BSDFFS, /* d */ 236 FS_BSDFFS, /* e */ 237 FS_BSDFFS, /* f */ 238 FS_BSDFFS, /* g */ 239 FS_BSDFFS, /* h */ 240 }; 241 242 /* 243 * Given a SunOS disk label, set lp to a BSD disk label. 244 * Returns NULL on success, else an error string. 245 * 246 * The BSD label is cleared out before this is called. 247 */ 248 static char * 249 disklabel_sun_to_bsd(cp, lp) 250 char *cp; 251 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 #ifdef NOTDEF_DEBUG 300 printf("partition %d start %x size %x\n", i, (int)npp->p_offset, (int)npp->p_size); 301 #endif 302 if (npp->p_size == 0) { 303 npp->p_fstype = FS_UNUSED; 304 } else { 305 npp->p_fstype = sun_fstypes[i]; 306 if (npp->p_fstype == FS_BSDFFS) { 307 /* 308 * The sun label does not store the FFS fields, 309 * so just set them with default values here. 310 */ 311 npp->p_fsize = 1024; 312 npp->p_frag = 8; 313 npp->p_cpg = 16; 314 } 315 } 316 } 317 318 lp->d_checksum = 0; 319 lp->d_checksum = dkcksum(lp); 320 #ifdef NOTDEF_DEBUG 321 printf("disklabel_sun_to_bsd: success!\n"); 322 #endif 323 return (NULL); 324 } 325 326 /* 327 * Find a valid disklabel. 328 */ 329 static char * 330 search_label(devp, off, buf, lp, off0) 331 struct of_dev *devp; 332 u_long off; 333 char *buf; 334 struct disklabel *lp; 335 u_long off0; 336 { 337 size_t read; 338 struct mbr_partition *p; 339 int i; 340 u_long poff; 341 static int recursion; 342 343 struct disklabel *dlp; 344 struct sun_disklabel *slp; 345 int error; 346 347 /* minimal requirements for archtypal disk label */ 348 if (lp->d_secperunit == 0) 349 lp->d_secperunit = 0x1fffffff; 350 lp->d_npartitions = 1; 351 if (lp->d_partitions[0].p_size == 0) 352 lp->d_partitions[0].p_size = 0x1fffffff; 353 lp->d_partitions[0].p_offset = 0; 354 355 if (strategy(devp, F_READ, LABELSECTOR, DEV_BSIZE, buf, &read) 356 || read != DEV_BSIZE) 357 return ("Cannot read label"); 358 /* Check for a NetBSD disk label. */ 359 dlp = (struct disklabel *) (buf + LABELOFFSET); 360 if (dlp->d_magic == DISKMAGIC) { 361 if (dkcksum(dlp)) 362 return ("NetBSD disk label corrupted"); 363 *lp = *dlp; 364 #ifdef NOTDEF_DEBUG 365 printf("search_label: found NetBSD label\n"); 366 #endif 367 return (NULL); 368 } 369 370 /* Check for a Sun disk label (for PROM compatibility). */ 371 slp = (struct sun_disklabel *) buf; 372 if (slp->sl_magic == SUN_DKMAGIC) 373 return (disklabel_sun_to_bsd(buf, lp)); 374 375 376 bzero(buf, sizeof(buf)); 377 return ("no disk label"); 378 } 379 380 int 381 devopen(of, name, file) 382 struct open_file *of; 383 const char *name; 384 char **file; 385 { 386 char *cp; 387 char partition; 388 char fname[256]; 389 char buf[DEV_BSIZE]; 390 struct disklabel label; 391 int handle, part; 392 size_t read; 393 char *errmsg = NULL; 394 int error = 0; 395 396 if (ofdev.handle != -1) 397 panic("devopen"); 398 if (of->f_flags != F_READ) 399 return EPERM; 400 #ifdef NOTDEF_DEBUG 401 printf("devopen: you want %s\n", name); 402 #endif 403 strcpy(fname, name); 404 cp = filename(fname, &partition); 405 if (cp) { 406 strcpy(buf, cp); 407 *cp = 0; 408 } 409 if (!cp || !*buf) 410 strcpy(buf, DEFAULT_KERNEL); 411 if (!*fname) 412 strcpy(fname, bootdev); 413 strcpy(opened_name, fname); 414 if (partition) { 415 cp = opened_name + strlen(opened_name); 416 *cp++ = ':'; 417 *cp++ = partition; 418 *cp = 0; 419 } 420 if (*buf != '/') 421 strcat(opened_name, "/"); 422 strcat(opened_name, buf); 423 *file = opened_name + strlen(fname) + 1; 424 #ifdef NOTDEF_DEBUG 425 printf("devopen: trying %s\n", fname); 426 #endif 427 if ((handle = OF_finddevice(fname)) == -1) 428 return ENOENT; 429 #ifdef NOTDEF_DEBUG 430 printf("devopen: found %s\n", fname); 431 #endif 432 if (OF_getprop(handle, "name", buf, sizeof buf) < 0) 433 return ENXIO; 434 #ifdef NOTDEF_DEBUG 435 printf("devopen: %s is called %s\n", fname, buf); 436 #endif 437 floppyboot = !strcmp(buf, "floppy"); 438 if (OF_getprop(handle, "device_type", buf, sizeof buf) < 0) 439 return ENXIO; 440 #ifdef NOTDEF_DEBUG 441 printf("devopen: %s is a %s device\n", fname, buf); 442 #endif 443 #ifdef NOTDEF_DEBUG 444 printf("devopen: opening %s\n", fname); 445 #endif 446 if ((handle = OF_open(fname)) == -1) { 447 #ifdef NOTDEF_DEBUG 448 printf("devopen: open of %s failed\n", fname); 449 #endif 450 return ENXIO; 451 } 452 #ifdef NOTDEF_DEBUG 453 printf("devopen: %s is now open\n", fname); 454 #endif 455 bzero(&ofdev, sizeof ofdev); 456 ofdev.handle = handle; 457 if (!strcmp(buf, "block")) { 458 ofdev.type = OFDEV_DISK; 459 ofdev.bsize = DEV_BSIZE; 460 /* First try to find a disklabel without MBR partitions */ 461 #ifdef NOTDEF_DEBUG 462 printf("devopen: trying to read disklabel\n"); 463 #endif 464 if (strategy(&ofdev, F_READ, 465 LABELSECTOR, DEV_BSIZE, buf, &read) != 0 466 || read != DEV_BSIZE 467 || (errmsg = getdisklabel(buf, &label))) { 468 if (errmsg) printf("devopen: getdisklabel sez %s\n", errmsg); 469 /* Else try MBR partitions */ 470 errmsg = search_label(&ofdev, 0, buf, &label, 0); 471 if (errmsg) { 472 printf("devopen: search_label sez %s\n", errmsg); 473 error = ERDLAB; 474 } 475 if (error && error != ERDLAB) 476 goto bad; 477 } 478 479 if (error == ERDLAB) { 480 if (partition) 481 /* User specified a parititon, but there is none */ 482 goto bad; 483 /* No, label, just use complete disk */ 484 ofdev.partoff = 0; 485 } else { 486 part = partition ? partition - 'a' : 0; 487 ofdev.partoff = label.d_partitions[part].p_offset; 488 #ifdef NOTDEF_DEBUG 489 printf("devopen: setting partition %d offset %x\n", 490 part, ofdev.partoff); 491 #endif 492 } 493 494 of->f_dev = devsw; 495 of->f_devdata = &ofdev; 496 #ifdef SPARC_BOOT_UFS 497 bcopy(&file_system_ufs, &file_system[nfsys++], sizeof file_system[0]); 498 #endif 499 #ifdef SPARC_BOOT_HSFS 500 bcopy(&file_system_cd9660, &file_system[nfsys++], 501 sizeof file_system[0]); 502 #endif 503 #ifdef NOTDEF_DEBUG 504 printf("devopen: return 0\n"); 505 #endif 506 return 0; 507 } 508 #ifdef NETBOOT 509 if (!strcmp(buf, "network")) { 510 ofdev.type = OFDEV_NET; 511 of->f_dev = devsw; 512 of->f_devdata = &ofdev; 513 bcopy(&file_system_nfs, file_system, sizeof file_system[0]); 514 nfsys = 1; 515 if (error = net_open(&ofdev)) 516 goto bad; 517 return 0; 518 } 519 #endif 520 error = EFTYPE; 521 bad: 522 #ifdef NOTDEF_DEBUG 523 printf("devopen: error %d, cannot open device\n", error); 524 #endif 525 OF_close(handle); 526 ofdev.handle = -1; 527 return error; 528 } 529
Indexes created Wed Sep 24 22:09:59 GMT 2025