1 /*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * 4 * This software was developed by Semihalf under sponsorship from 5 * the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <stand.h> 33 #include <libfdt.h> 34 #include <fdt.h> 35 #include <sys/param.h> 36 #include <sys/linker.h> 37 #include <machine/elf.h> 38 39 #include "bootstrap.h" 40 #include "fdt_platform.h" 41 42 #ifdef DEBUG 43 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 44 printf(fmt,##args); } while (0) 45 #else 46 #define debugf(fmt, args...) 47 #endif 48 49 #define FDT_CWD_LEN 256 50 #define FDT_MAX_DEPTH 12 51 52 #define FDT_PROP_SEP " = " 53 54 #define COPYOUT(s,d,l) archsw.arch_copyout(s, d, l) 55 #define COPYIN(s,d,l) archsw.arch_copyin(s, d, l) 56 57 #define FDT_STATIC_DTB_SYMBOL "fdt_static_dtb" 58 59 #define CMD_REQUIRES_BLOB 0x01 60 61 /* Location of FDT yet to be loaded. */ 62 /* This may be in read-only memory, so can't be manipulated directly. */ 63 static struct fdt_header *fdt_to_load = NULL; 64 /* Location of FDT on heap. */ 65 /* This is the copy we actually manipulate. */ 66 static struct fdt_header *fdtp = NULL; 67 /* Size of FDT blob */ 68 static size_t fdtp_size = 0; 69 /* Have we loaded all the needed overlays */ 70 static int fdt_overlays_applied = 0; 71 72 static int fdt_load_dtb(vm_offset_t va); 73 static void fdt_print_overlay_load_error(int err, const char *filename); 74 static int fdt_check_overlay_compatible(void *base_fdt, void *overlay_fdt); 75 76 static int fdt_cmd_nyi(int argc, char *argv[]); 77 static int fdt_load_dtb_overlays_string(const char * filenames); 78 79 static int fdt_cmd_addr(int argc, char *argv[]); 80 static int fdt_cmd_mkprop(int argc, char *argv[]); 81 static int fdt_cmd_cd(int argc, char *argv[]); 82 static int fdt_cmd_hdr(int argc, char *argv[]); 83 static int fdt_cmd_ls(int argc, char *argv[]); 84 static int fdt_cmd_prop(int argc, char *argv[]); 85 static int fdt_cmd_pwd(int argc, char *argv[]); 86 static int fdt_cmd_rm(int argc, char *argv[]); 87 static int fdt_cmd_mknode(int argc, char *argv[]); 88 static int fdt_cmd_mres(int argc, char *argv[]); 89 90 typedef int cmdf_t(int, char *[]); 91 92 struct cmdtab { 93 const char *name; 94 cmdf_t *handler; 95 int flags; 96 }; 97 98 static const struct cmdtab commands[] = { 99 { "addr", &fdt_cmd_addr, 0 }, 100 { "alias", &fdt_cmd_nyi, 0 }, 101 { "cd", &fdt_cmd_cd, CMD_REQUIRES_BLOB }, 102 { "header", &fdt_cmd_hdr, CMD_REQUIRES_BLOB }, 103 { "ls", &fdt_cmd_ls, CMD_REQUIRES_BLOB }, 104 { "mknode", &fdt_cmd_mknode, CMD_REQUIRES_BLOB }, 105 { "mkprop", &fdt_cmd_mkprop, CMD_REQUIRES_BLOB }, 106 { "mres", &fdt_cmd_mres, CMD_REQUIRES_BLOB }, 107 { "prop", &fdt_cmd_prop, CMD_REQUIRES_BLOB }, 108 { "pwd", &fdt_cmd_pwd, CMD_REQUIRES_BLOB }, 109 { "rm", &fdt_cmd_rm, CMD_REQUIRES_BLOB }, 110 { NULL, NULL } 111 }; 112 113 static char cwd[FDT_CWD_LEN] = "/"; 114 115 static vm_offset_t 116 fdt_find_static_dtb() 117 { 118 Elf_Ehdr *ehdr; 119 Elf_Shdr *shdr; 120 Elf_Sym sym; 121 vm_offset_t strtab, symtab, fdt_start; 122 uint64_t offs; 123 struct preloaded_file *kfp; 124 struct file_metadata *md; 125 char *strp; 126 int i, sym_count; 127 128 debugf("fdt_find_static_dtb()\n"); 129 130 sym_count = symtab = strtab = 0; 131 strp = NULL; 132 133 offs = __elfN(relocation_offset); 134 135 kfp = file_findfile(NULL, NULL); 136 if (kfp == NULL) 137 return (0); 138 139 /* Locate the dynamic symbols and strtab. */ 140 md = file_findmetadata(kfp, MODINFOMD_ELFHDR); 141 if (md == NULL) 142 return (0); 143 ehdr = (Elf_Ehdr *)md->md_data; 144 145 md = file_findmetadata(kfp, MODINFOMD_SHDR); 146 if (md == NULL) 147 return (0); 148 shdr = (Elf_Shdr *)md->md_data; 149 150 for (i = 0; i < ehdr->e_shnum; ++i) { 151 if (shdr[i].sh_type == SHT_DYNSYM && symtab == 0) { 152 symtab = shdr[i].sh_addr + offs; 153 sym_count = shdr[i].sh_size / sizeof(Elf_Sym); 154 } else if (shdr[i].sh_type == SHT_STRTAB && strtab == 0) { 155 strtab = shdr[i].sh_addr + offs; 156 } 157 } 158 159 /* 160 * The most efficient way to find a symbol would be to calculate a 161 * hash, find proper bucket and chain, and thus find a symbol. 162 * However, that would involve code duplication (e.g. for hash 163 * function). So we're using simpler and a bit slower way: we're 164 * iterating through symbols, searching for the one which name is 165 * 'equal' to 'fdt_static_dtb'. To speed up the process a little bit, 166 * we are eliminating symbols type of which is not STT_NOTYPE, or(and) 167 * those which binding attribute is not STB_GLOBAL. 168 */ 169 fdt_start = 0; 170 while (sym_count > 0 && fdt_start == 0) { 171 COPYOUT(symtab, &sym, sizeof(sym)); 172 symtab += sizeof(sym); 173 --sym_count; 174 if (ELF_ST_BIND(sym.st_info) != STB_GLOBAL || 175 ELF_ST_TYPE(sym.st_info) != STT_NOTYPE) 176 continue; 177 strp = strdupout(strtab + sym.st_name); 178 if (strcmp(strp, FDT_STATIC_DTB_SYMBOL) == 0) 179 fdt_start = (vm_offset_t)sym.st_value + offs; 180 free(strp); 181 } 182 return (fdt_start); 183 } 184 185 static int 186 fdt_load_dtb(vm_offset_t va) 187 { 188 struct fdt_header header; 189 int err; 190 191 debugf("fdt_load_dtb(0x%08jx)\n", (uintmax_t)va); 192 193 COPYOUT(va, &header, sizeof(header)); 194 err = fdt_check_header(&header); 195 if (err < 0) { 196 if (err == -FDT_ERR_BADVERSION) { 197 snprintf(command_errbuf, sizeof(command_errbuf), 198 "incompatible blob version: %d, should be: %d", 199 fdt_version(fdtp), FDT_LAST_SUPPORTED_VERSION); 200 } else { 201 snprintf(command_errbuf, sizeof(command_errbuf), 202 "error validating blob: %s", fdt_strerror(err)); 203 } 204 return (1); 205 } 206 207 /* 208 * Release previous blob 209 */ 210 if (fdtp) 211 free(fdtp); 212 213 fdtp_size = fdt_totalsize(&header); 214 fdtp = malloc(fdtp_size); 215 216 if (fdtp == NULL) { 217 command_errmsg = "can't allocate memory for device tree copy"; 218 return (1); 219 } 220 221 COPYOUT(va, fdtp, fdtp_size); 222 debugf("DTB blob found at 0x%jx, size: 0x%jx\n", (uintmax_t)va, (uintmax_t)fdtp_size); 223 224 return (0); 225 } 226 227 int 228 fdt_load_dtb_addr(struct fdt_header *header) 229 { 230 int err; 231 232 debugf("fdt_load_dtb_addr(%p)\n", header); 233 234 fdtp_size = fdt_totalsize(header); 235 err = fdt_check_header(header); 236 if (err < 0) { 237 snprintf(command_errbuf, sizeof(command_errbuf), 238 "error validating blob: %s", fdt_strerror(err)); 239 return (err); 240 } 241 free(fdtp); 242 if ((fdtp = malloc(fdtp_size)) == NULL) { 243 command_errmsg = "can't allocate memory for device tree copy"; 244 return (1); 245 } 246 247 bcopy(header, fdtp, fdtp_size); 248 return (0); 249 } 250 251 int 252 fdt_load_dtb_file(const char * filename) 253 { 254 struct preloaded_file *bfp, *oldbfp; 255 int err; 256 257 debugf("fdt_load_dtb_file(%s)\n", filename); 258 259 oldbfp = file_findfile(NULL, "dtb"); 260 261 /* Attempt to load and validate a new dtb from a file. */ 262 if ((bfp = file_loadraw(filename, "dtb", 1)) == NULL) { 263 snprintf(command_errbuf, sizeof(command_errbuf), 264 "failed to load file '%s'", filename); 265 return (1); 266 } 267 if ((err = fdt_load_dtb(bfp->f_addr)) != 0) { 268 file_discard(bfp); 269 return (err); 270 } 271 272 /* A new dtb was validated, discard any previous file. */ 273 if (oldbfp) 274 file_discard(oldbfp); 275 return (0); 276 } 277 278 static int 279 fdt_load_dtb_overlay(const char * filename) 280 { 281 struct preloaded_file *bfp; 282 struct fdt_header header; 283 int err; 284 285 debugf("fdt_load_dtb_overlay(%s)\n", filename); 286 287 /* Attempt to load and validate a new dtb from a file. FDT_ERR_NOTFOUND 288 * is normally a libfdt error code, but libfdt would actually return 289 * -FDT_ERR_NOTFOUND. We re-purpose the error code here to convey a 290 * similar meaning: the file itself was not found, which can still be 291 * considered an error dealing with FDT pieces. 292 */ 293 if ((bfp = file_loadraw(filename, "dtbo", 1)) == NULL) 294 return (FDT_ERR_NOTFOUND); 295 296 COPYOUT(bfp->f_addr, &header, sizeof(header)); 297 err = fdt_check_header(&header); 298 299 if (err < 0) { 300 file_discard(bfp); 301 return (err); 302 } 303 304 return (0); 305 } 306 307 static void 308 fdt_print_overlay_load_error(int err, const char *filename) 309 { 310 311 switch (err) { 312 case FDT_ERR_NOTFOUND: 313 printf("%s: failed to load file\n", filename); 314 break; 315 case -FDT_ERR_BADVERSION: 316 printf("%s: incompatible blob version: %d, should be: %d\n", 317 filename, fdt_version(fdtp), 318 FDT_LAST_SUPPORTED_VERSION); 319 break; 320 default: 321 /* libfdt errs are negative */ 322 if (err < 0) 323 printf("%s: error validating blob: %s\n", 324 filename, fdt_strerror(err)); 325 else 326 printf("%s: unknown load error\n", filename); 327 break; 328 } 329 } 330 331 static int 332 fdt_load_dtb_overlays_string(const char * filenames) 333 { 334 char *names; 335 char *name, *name_ext; 336 char *comaptr; 337 int err, namesz; 338 339 debugf("fdt_load_dtb_overlays_string(%s)\n", filenames); 340 341 names = strdup(filenames); 342 if (names == NULL) 343 return (1); 344 name = names; 345 do { 346 comaptr = strchr(name, ','); 347 if (comaptr) 348 *comaptr = '\0'; 349 err = fdt_load_dtb_overlay(name); 350 if (err == FDT_ERR_NOTFOUND) { 351 /* Allocate enough to append ".dtbo" */ 352 namesz = strlen(name) + 6; 353 name_ext = malloc(namesz); 354 if (name_ext == NULL) { 355 fdt_print_overlay_load_error(err, name); 356 name = comaptr + 1; 357 continue; 358 } 359 snprintf(name_ext, namesz, "%s.dtbo", name); 360 err = fdt_load_dtb_overlay(name_ext); 361 free(name_ext); 362 } 363 /* Catch error with either initial load or fallback load */ 364 if (err != 0) 365 fdt_print_overlay_load_error(err, name); 366 name = comaptr + 1; 367 } while(comaptr); 368 369 free(names); 370 return (0); 371 } 372 373 /* 374 * fdt_check_overlay_compatible - check that the overlay_fdt is compatible with 375 * base_fdt before we attempt to apply it. It will need to re-calculate offsets 376 * in the base every time, rather than trying to cache them earlier in the 377 * process, because the overlay application process can/will invalidate a lot of 378 * offsets. 379 */ 380 static int 381 fdt_check_overlay_compatible(void *base_fdt, void *overlay_fdt) 382 { 383 const char *compat; 384 int compat_len, ocompat_len; 385 int oroot_offset, root_offset; 386 int slidx, sllen; 387 388 oroot_offset = fdt_path_offset(overlay_fdt, "/"); 389 if (oroot_offset < 0) 390 return (oroot_offset); 391 /* 392 * If /compatible in the overlay does not exist or if it is empty, then 393 * we're automatically compatible. We do this for the sake of rapid 394 * overlay development for overlays that aren't intended to be deployed. 395 * The user assumes the risk of using an overlay without /compatible. 396 */ 397 if (fdt_get_property(overlay_fdt, oroot_offset, "compatible", 398 &ocompat_len) == NULL || ocompat_len == 0) 399 return (0); 400 root_offset = fdt_path_offset(base_fdt, "/"); 401 if (root_offset < 0) 402 return (root_offset); 403 /* 404 * However, an empty or missing /compatible on the base is an error, 405 * because allowing this offers no advantages. 406 */ 407 if (fdt_get_property(base_fdt, root_offset, "compatible", 408 &compat_len) == NULL) 409 return (compat_len); 410 else if(compat_len == 0) 411 return (1); 412 413 slidx = 0; 414 compat = fdt_stringlist_get(overlay_fdt, oroot_offset, "compatible", 415 slidx, &sllen); 416 while (compat != NULL) { 417 if (fdt_stringlist_search(base_fdt, root_offset, "compatible", 418 compat) >= 0) 419 return (0); 420 ++slidx; 421 compat = fdt_stringlist_get(overlay_fdt, oroot_offset, 422 "compatible", slidx, &sllen); 423 }; 424 425 /* We've exhausted the overlay's /compatible property... no match */ 426 return (1); 427 } 428 429 /* 430 * Returns the number of overlays successfully applied 431 */ 432 int 433 fdt_apply_overlays() 434 { 435 struct preloaded_file *fp; 436 size_t max_overlay_size, next_fdtp_size; 437 size_t current_fdtp_size; 438 void *current_fdtp; 439 void *next_fdtp; 440 void *overlay; 441 int overlays_applied, rv; 442 443 if ((fdtp == NULL) || (fdtp_size == 0)) 444 return (0); 445 446 if (fdt_overlays_applied) 447 return (0); 448 449 max_overlay_size = 0; 450 for (fp = file_findfile(NULL, "dtbo"); fp != NULL; fp = fp->f_next) { 451 if (max_overlay_size < fp->f_size) 452 max_overlay_size = fp->f_size; 453 } 454 455 /* Nothing to apply */ 456 if (max_overlay_size == 0) 457 return (0); 458 459 overlay = malloc(max_overlay_size); 460 if (overlay == NULL) { 461 printf("failed to allocate memory for DTB blob with overlays\n"); 462 return (0); 463 } 464 current_fdtp = fdtp; 465 current_fdtp_size = fdtp_size; 466 overlays_applied = 0; 467 for (fp = file_findfile(NULL, "dtbo"); fp != NULL; fp = fp->f_next) { 468 if (strcmp(fp->f_type, "dtbo") != 0) 469 continue; 470 COPYOUT(fp->f_addr, overlay, fp->f_size); 471 /* Check compatible first to avoid unnecessary allocation */ 472 rv = fdt_check_overlay_compatible(current_fdtp, overlay); 473 if (rv != 0) { 474 printf("DTB overlay '%s' not compatible\n", fp->f_name); 475 continue; 476 } 477 printf("applying DTB overlay '%s'\n", fp->f_name); 478 next_fdtp_size = current_fdtp_size + fp->f_size; 479 next_fdtp = malloc(next_fdtp_size); 480 if (next_fdtp == NULL) { 481 /* 482 * Output warning, then move on to applying other 483 * overlays in case this one is simply too large. 484 */ 485 printf("failed to allocate memory for overlay base\n"); 486 continue; 487 } 488 rv = fdt_open_into(current_fdtp, next_fdtp, next_fdtp_size); 489 if (rv != 0) { 490 free(next_fdtp); 491 printf("failed to open base dtb into overlay base\n"); 492 continue; 493 } 494 /* Both overlay and next_fdtp may be modified in place */ 495 rv = fdt_overlay_apply(next_fdtp, overlay); 496 if (rv == 0) { 497 /* Rotate next -> current */ 498 if (current_fdtp != fdtp) 499 free(current_fdtp); 500 current_fdtp = next_fdtp; 501 fdt_pack(current_fdtp); 502 current_fdtp_size = fdt_totalsize(current_fdtp); 503 overlays_applied++; 504 } else { 505 /* 506 * Assume here that the base we tried to apply on is 507 * either trashed or in an inconsistent state. Trying to 508 * load it might work, but it's better to discard it and 509 * play it safe. */ 510 free(next_fdtp); 511 printf("failed to apply overlay: %s\n", 512 fdt_strerror(rv)); 513 } 514 } 515 /* We could have failed to apply all overlays; then we do nothing */ 516 if (current_fdtp != fdtp) { 517 free(fdtp); 518 fdtp = current_fdtp; 519 fdtp_size = current_fdtp_size; 520 } 521 free(overlay); 522 fdt_overlays_applied = 1; 523 return (overlays_applied); 524 } 525 526 int 527 fdt_pad_dtb(size_t padding) 528 { 529 void *padded_fdtp; 530 size_t padded_fdtp_size; 531 532 padded_fdtp_size = fdtp_size + padding; 533 padded_fdtp = malloc(padded_fdtp_size); 534 if (padded_fdtp == NULL) 535 return (1); 536 if (fdt_open_into(fdtp, padded_fdtp, padded_fdtp_size) != 0) { 537 free(padded_fdtp); 538 return (1); 539 } 540 fdtp = padded_fdtp; 541 fdtp_size = padded_fdtp_size; 542 return (0); 543 } 544 545 int 546 fdt_is_setup(void) 547 { 548 549 if (fdtp != NULL) 550 return (1); 551 552 return (0); 553 } 554 555 int 556 fdt_setup_fdtp() 557 { 558 struct preloaded_file *bfp; 559 vm_offset_t va; 560 561 debugf("fdt_setup_fdtp()\n"); 562 563 /* If we already loaded a file, use it. */ 564 if ((bfp = file_findfile(NULL, "dtb")) != NULL) { 565 if (fdt_load_dtb(bfp->f_addr) == 0) { 566 printf("Using DTB from loaded file '%s'.\n", 567 bfp->f_name); 568 fdt_platform_load_overlays(); 569 return (0); 570 } 571 } 572 573 /* If we were given the address of a valid blob in memory, use it. */ 574 if (fdt_to_load != NULL) { 575 if (fdt_load_dtb_addr(fdt_to_load) == 0) { 576 printf("Using DTB from memory address %p.\n", 577 fdt_to_load); 578 fdt_platform_load_overlays(); 579 return (0); 580 } 581 } 582 583 if (fdt_platform_load_dtb() == 0) { 584 fdt_platform_load_overlays(); 585 return (0); 586 } 587 588 /* If there is a dtb compiled into the kernel, use it. */ 589 if ((va = fdt_find_static_dtb()) != 0) { 590 if (fdt_load_dtb(va) == 0) { 591 printf("Using DTB compiled into kernel.\n"); 592 return (0); 593 } 594 } 595 596 command_errmsg = "No device tree blob found!\n"; 597 return (1); 598 } 599 600 #define fdt_strtovect(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 601 (cellbuf), (lim), (cellsize), 0); 602 603 /* Force using base 16 */ 604 #define fdt_strtovectx(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 605 (cellbuf), (lim), (cellsize), 16); 606 607 static int 608 _fdt_strtovect(const char *str, void *cellbuf, int lim, unsigned char cellsize, 609 uint8_t base) 610 { 611 const char *buf = str; 612 const char *end = str + strlen(str) - 2; 613 uint32_t *u32buf = NULL; 614 uint8_t *u8buf = NULL; 615 int cnt = 0; 616 617 if (cellsize == sizeof(uint32_t)) 618 u32buf = (uint32_t *)cellbuf; 619 else 620 u8buf = (uint8_t *)cellbuf; 621 622 if (lim == 0) 623 return (0); 624 625 while (buf < end) { 626 627 /* Skip white whitespace(s)/separators */ 628 while (!isxdigit(*buf) && buf < end) 629 buf++; 630 631 if (u32buf != NULL) 632 u32buf[cnt] = 633 cpu_to_fdt32((uint32_t)strtol(buf, NULL, base)); 634 635 else 636 u8buf[cnt] = (uint8_t)strtol(buf, NULL, base); 637 638 if (cnt + 1 <= lim - 1) 639 cnt++; 640 else 641 break; 642 buf++; 643 /* Find another number */ 644 while ((isxdigit(*buf) || *buf == 'x') && buf < end) 645 buf++; 646 } 647 return (cnt); 648 } 649 650 void 651 fdt_fixup_ethernet(const char *str, char *ethstr, int len) 652 { 653 uint8_t tmp_addr[6]; 654 655 /* Convert macaddr string into a vector of uints */ 656 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t)); 657 /* Set actual property to a value from vect */ 658 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr), 659 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t)); 660 } 661 662 void 663 fdt_fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq) 664 { 665 int lo, o = 0, o2, maxo = 0, depth; 666 const uint32_t zero = 0; 667 668 /* We want to modify every subnode of /cpus */ 669 o = fdt_path_offset(fdtp, "/cpus"); 670 if (o < 0) 671 return; 672 673 /* maxo should contain offset of node next to /cpus */ 674 depth = 0; 675 maxo = o; 676 while (depth != -1) 677 maxo = fdt_next_node(fdtp, maxo, &depth); 678 679 /* Find CPU frequency properties */ 680 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency", 681 &zero, sizeof(uint32_t)); 682 683 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero, 684 sizeof(uint32_t)); 685 686 lo = MIN(o, o2); 687 688 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) { 689 690 o = fdt_node_offset_by_prop_value(fdtp, lo, 691 "clock-frequency", &zero, sizeof(uint32_t)); 692 693 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency", 694 &zero, sizeof(uint32_t)); 695 696 /* We're only interested in /cpus subnode(s) */ 697 if (lo > maxo) 698 break; 699 700 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency", 701 (uint32_t)cpufreq); 702 703 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency", 704 (uint32_t)busfreq); 705 706 lo = MIN(o, o2); 707 } 708 } 709 710 #ifdef notyet 711 static int 712 fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells) 713 { 714 int cells_in_tuple, i, tuples, tuple_size; 715 uint32_t cur_start, cur_size; 716 717 cells_in_tuple = (addr_cells + size_cells); 718 tuple_size = cells_in_tuple * sizeof(uint32_t); 719 tuples = len / tuple_size; 720 if (tuples == 0) 721 return (EINVAL); 722 723 for (i = 0; i < tuples; i++) { 724 if (addr_cells == 2) 725 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]); 726 else 727 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]); 728 729 if (size_cells == 2) 730 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]); 731 else 732 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]); 733 734 if (cur_size == 0) 735 return (EINVAL); 736 737 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n", 738 i, cur_start, cur_size); 739 } 740 return (0); 741 } 742 #endif 743 744 void 745 fdt_fixup_memory(struct fdt_mem_region *region, size_t num) 746 { 747 struct fdt_mem_region *curmr; 748 uint32_t addr_cells, size_cells; 749 uint32_t *addr_cellsp, *size_cellsp; 750 int err, i, len, memory, root; 751 size_t realmrno; 752 uint8_t *buf, *sb; 753 uint64_t rstart, rsize; 754 int reserved; 755 756 root = fdt_path_offset(fdtp, "/"); 757 if (root < 0) { 758 sprintf(command_errbuf, "Could not find root node !"); 759 return; 760 } 761 762 memory = fdt_path_offset(fdtp, "/memory"); 763 if (memory <= 0) { 764 /* Create proper '/memory' node. */ 765 memory = fdt_add_subnode(fdtp, root, "memory"); 766 if (memory <= 0) { 767 snprintf(command_errbuf, sizeof(command_errbuf), 768 "Could not fixup '/memory' " 769 "node, error code : %d!\n", memory); 770 return; 771 } 772 773 err = fdt_setprop(fdtp, memory, "device_type", "memory", 774 sizeof("memory")); 775 776 if (err < 0) 777 return; 778 } 779 780 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells", 781 NULL); 782 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL); 783 784 if (addr_cellsp == NULL || size_cellsp == NULL) { 785 snprintf(command_errbuf, sizeof(command_errbuf), 786 "Could not fixup '/memory' node : " 787 "%s %s property not found in root node!\n", 788 (!addr_cellsp) ? "#address-cells" : "", 789 (!size_cellsp) ? "#size-cells" : ""); 790 return; 791 } 792 793 addr_cells = fdt32_to_cpu(*addr_cellsp); 794 size_cells = fdt32_to_cpu(*size_cellsp); 795 796 /* 797 * Convert memreserve data to memreserve property 798 * Check if property already exists 799 */ 800 reserved = fdt_num_mem_rsv(fdtp); 801 if (reserved && 802 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) { 803 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t); 804 sb = buf = (uint8_t *)malloc(len); 805 if (!buf) 806 return; 807 808 bzero(buf, len); 809 810 for (i = 0; i < reserved; i++) { 811 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize)) 812 break; 813 if (rsize) { 814 /* Ensure endianness, and put cells into a buffer */ 815 if (addr_cells == 2) 816 *(uint64_t *)buf = 817 cpu_to_fdt64(rstart); 818 else 819 *(uint32_t *)buf = 820 cpu_to_fdt32(rstart); 821 822 buf += sizeof(uint32_t) * addr_cells; 823 if (size_cells == 2) 824 *(uint64_t *)buf = 825 cpu_to_fdt64(rsize); 826 else 827 *(uint32_t *)buf = 828 cpu_to_fdt32(rsize); 829 830 buf += sizeof(uint32_t) * size_cells; 831 } 832 } 833 834 /* Set property */ 835 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0) 836 printf("Could not fixup 'memreserve' property.\n"); 837 838 free(sb); 839 } 840 841 /* Count valid memory regions entries in sysinfo. */ 842 realmrno = num; 843 for (i = 0; i < num; i++) 844 if (region[i].start == 0 && region[i].size == 0) 845 realmrno--; 846 847 if (realmrno == 0) { 848 sprintf(command_errbuf, "Could not fixup '/memory' node : " 849 "sysinfo doesn't contain valid memory regions info!\n"); 850 return; 851 } 852 853 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t); 854 sb = buf = (uint8_t *)malloc(len); 855 if (!buf) 856 return; 857 858 bzero(buf, len); 859 860 for (i = 0; i < num; i++) { 861 curmr = ®ion[i]; 862 if (curmr->size != 0) { 863 /* Ensure endianness, and put cells into a buffer */ 864 if (addr_cells == 2) 865 *(uint64_t *)buf = 866 cpu_to_fdt64(curmr->start); 867 else 868 *(uint32_t *)buf = 869 cpu_to_fdt32(curmr->start); 870 871 buf += sizeof(uint32_t) * addr_cells; 872 if (size_cells == 2) 873 *(uint64_t *)buf = 874 cpu_to_fdt64(curmr->size); 875 else 876 *(uint32_t *)buf = 877 cpu_to_fdt32(curmr->size); 878 879 buf += sizeof(uint32_t) * size_cells; 880 } 881 } 882 883 /* Set property */ 884 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0) 885 sprintf(command_errbuf, "Could not fixup '/memory' node.\n"); 886 887 free(sb); 888 } 889 890 void 891 fdt_fixup_stdout(const char *str) 892 { 893 char *ptr; 894 int len, no, sero; 895 const struct fdt_property *prop; 896 char *tmp[10]; 897 898 ptr = (char *)str + strlen(str) - 1; 899 while (ptr > str && isdigit(*(str - 1))) 900 str--; 901 902 if (ptr == str) 903 return; 904 905 no = fdt_path_offset(fdtp, "/chosen"); 906 if (no < 0) 907 return; 908 909 prop = fdt_get_property(fdtp, no, "stdout", &len); 910 911 /* If /chosen/stdout does not extist, create it */ 912 if (prop == NULL || (prop != NULL && len == 0)) { 913 914 bzero(tmp, 10 * sizeof(char)); 915 strcpy((char *)&tmp, "serial"); 916 if (strlen(ptr) > 3) 917 /* Serial number too long */ 918 return; 919 920 strncpy((char *)tmp + 6, ptr, 3); 921 sero = fdt_path_offset(fdtp, (const char *)tmp); 922 if (sero < 0) 923 /* 924 * If serial device we're trying to assign 925 * stdout to doesn't exist in DT -- return. 926 */ 927 return; 928 929 fdt_setprop(fdtp, no, "stdout", &tmp, 930 strlen((char *)&tmp) + 1); 931 fdt_setprop(fdtp, no, "stdin", &tmp, 932 strlen((char *)&tmp) + 1); 933 } 934 } 935 936 void 937 fdt_load_dtb_overlays(const char *extras) 938 { 939 const char *s; 940 941 /* Any extra overlays supplied by pre-loader environment */ 942 if (extras != NULL && *extras != '\0') { 943 printf("Loading DTB overlays: '%s'\n", extras); 944 fdt_load_dtb_overlays_string(extras); 945 } 946 947 /* Any overlays supplied by loader environment */ 948 s = getenv("fdt_overlays"); 949 if (s != NULL && *s != '\0') { 950 printf("Loading DTB overlays: '%s'\n", s); 951 fdt_load_dtb_overlays_string(s); 952 } 953 } 954 955 /* 956 * Locate the blob, fix it up and return its location. 957 */ 958 static int 959 fdt_fixup(void) 960 { 961 int chosen; 962 963 debugf("fdt_fixup()\n"); 964 965 if (fdtp == NULL && fdt_setup_fdtp() != 0) 966 return (0); 967 968 /* Create /chosen node (if not exists) */ 969 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) == 970 -FDT_ERR_NOTFOUND) 971 chosen = fdt_add_subnode(fdtp, 0, "chosen"); 972 973 /* Value assigned to fixup-applied does not matter. */ 974 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL)) 975 return (1); 976 977 fdt_platform_fixups(); 978 979 /* 980 * Re-fetch the /chosen subnode; our fixups may apply overlays or add 981 * nodes/properties that invalidate the offset we grabbed or created 982 * above, so we can no longer trust it. 983 */ 984 chosen = fdt_subnode_offset(fdtp, 0, "chosen"); 985 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0); 986 return (1); 987 } 988 989 /* 990 * Copy DTB blob to specified location and return size 991 */ 992 int 993 fdt_copy(vm_offset_t va) 994 { 995 int err; 996 debugf("fdt_copy va 0x%08x\n", va); 997 if (fdtp == NULL) { 998 err = fdt_setup_fdtp(); 999 if (err) { 1000 printf("No valid device tree blob found!\n"); 1001 return (0); 1002 } 1003 } 1004 1005 if (fdt_fixup() == 0) 1006 return (0); 1007 1008 COPYIN(fdtp, va, fdtp_size); 1009 return (fdtp_size); 1010 } 1011 1012 1013 1014 int 1015 command_fdt_internal(int argc, char *argv[]) 1016 { 1017 cmdf_t *cmdh; 1018 int flags; 1019 int i, err; 1020 1021 if (argc < 2) { 1022 command_errmsg = "usage is 'fdt <command> [<args>]"; 1023 return (CMD_ERROR); 1024 } 1025 1026 /* 1027 * Validate fdt <command>. 1028 */ 1029 i = 0; 1030 cmdh = NULL; 1031 while (!(commands[i].name == NULL)) { 1032 if (strcmp(argv[1], commands[i].name) == 0) { 1033 /* found it */ 1034 cmdh = commands[i].handler; 1035 flags = commands[i].flags; 1036 break; 1037 } 1038 i++; 1039 } 1040 if (cmdh == NULL) { 1041 command_errmsg = "unknown command"; 1042 return (CMD_ERROR); 1043 } 1044 1045 if (flags & CMD_REQUIRES_BLOB) { 1046 /* 1047 * Check if uboot env vars were parsed already. If not, do it now. 1048 */ 1049 if (fdt_fixup() == 0) 1050 return (CMD_ERROR); 1051 } 1052 1053 /* 1054 * Call command handler. 1055 */ 1056 err = (*cmdh)(argc, argv); 1057 1058 return (err); 1059 } 1060 1061 static int 1062 fdt_cmd_addr(int argc, char *argv[]) 1063 { 1064 struct preloaded_file *fp; 1065 struct fdt_header *hdr; 1066 const char *addr; 1067 char *cp; 1068 1069 fdt_to_load = NULL; 1070 1071 if (argc > 2) 1072 addr = argv[2]; 1073 else { 1074 sprintf(command_errbuf, "no address specified"); 1075 return (CMD_ERROR); 1076 } 1077 1078 hdr = (struct fdt_header *)strtoul(addr, &cp, 16); 1079 if (cp == addr) { 1080 snprintf(command_errbuf, sizeof(command_errbuf), 1081 "Invalid address: %s", addr); 1082 return (CMD_ERROR); 1083 } 1084 1085 while ((fp = file_findfile(NULL, "dtb")) != NULL) { 1086 file_discard(fp); 1087 } 1088 1089 fdt_to_load = hdr; 1090 return (CMD_OK); 1091 } 1092 1093 static int 1094 fdt_cmd_cd(int argc, char *argv[]) 1095 { 1096 char *path; 1097 char tmp[FDT_CWD_LEN]; 1098 int len, o; 1099 1100 path = (argc > 2) ? argv[2] : "/"; 1101 1102 if (path[0] == '/') { 1103 len = strlen(path); 1104 if (len >= FDT_CWD_LEN) 1105 goto fail; 1106 } else { 1107 /* Handle path specification relative to cwd */ 1108 len = strlen(cwd) + strlen(path) + 1; 1109 if (len >= FDT_CWD_LEN) 1110 goto fail; 1111 1112 strcpy(tmp, cwd); 1113 strcat(tmp, "/"); 1114 strcat(tmp, path); 1115 path = tmp; 1116 } 1117 1118 o = fdt_path_offset(fdtp, path); 1119 if (o < 0) { 1120 snprintf(command_errbuf, sizeof(command_errbuf), 1121 "could not find node: '%s'", path); 1122 return (CMD_ERROR); 1123 } 1124 1125 strcpy(cwd, path); 1126 return (CMD_OK); 1127 1128 fail: 1129 snprintf(command_errbuf, sizeof(command_errbuf), 1130 "path too long: %d, max allowed: %d", len, FDT_CWD_LEN - 1); 1131 return (CMD_ERROR); 1132 } 1133 1134 static int 1135 fdt_cmd_hdr(int argc __unused, char *argv[] __unused) 1136 { 1137 char line[80]; 1138 int ver; 1139 1140 if (fdtp == NULL) { 1141 command_errmsg = "no device tree blob pointer?!"; 1142 return (CMD_ERROR); 1143 } 1144 1145 ver = fdt_version(fdtp); 1146 pager_open(); 1147 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp); 1148 if (pager_output(line)) 1149 goto out; 1150 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp)); 1151 if (pager_output(line)) 1152 goto out; 1153 sprintf(line, " size = %d\n", fdt_totalsize(fdtp)); 1154 if (pager_output(line)) 1155 goto out; 1156 sprintf(line, " off_dt_struct = 0x%08x\n", 1157 fdt_off_dt_struct(fdtp)); 1158 if (pager_output(line)) 1159 goto out; 1160 sprintf(line, " off_dt_strings = 0x%08x\n", 1161 fdt_off_dt_strings(fdtp)); 1162 if (pager_output(line)) 1163 goto out; 1164 sprintf(line, " off_mem_rsvmap = 0x%08x\n", 1165 fdt_off_mem_rsvmap(fdtp)); 1166 if (pager_output(line)) 1167 goto out; 1168 sprintf(line, " version = %d\n", ver); 1169 if (pager_output(line)) 1170 goto out; 1171 sprintf(line, " last compatible version = %d\n", 1172 fdt_last_comp_version(fdtp)); 1173 if (pager_output(line)) 1174 goto out; 1175 if (ver >= 2) { 1176 sprintf(line, " boot_cpuid = %d\n", 1177 fdt_boot_cpuid_phys(fdtp)); 1178 if (pager_output(line)) 1179 goto out; 1180 } 1181 if (ver >= 3) { 1182 sprintf(line, " size_dt_strings = %d\n", 1183 fdt_size_dt_strings(fdtp)); 1184 if (pager_output(line)) 1185 goto out; 1186 } 1187 if (ver >= 17) { 1188 sprintf(line, " size_dt_struct = %d\n", 1189 fdt_size_dt_struct(fdtp)); 1190 if (pager_output(line)) 1191 goto out; 1192 } 1193 out: 1194 pager_close(); 1195 1196 return (CMD_OK); 1197 } 1198 1199 static int 1200 fdt_cmd_ls(int argc, char *argv[]) 1201 { 1202 const char *prevname[FDT_MAX_DEPTH] = { NULL }; 1203 const char *name; 1204 char *path; 1205 int i, o, depth; 1206 1207 path = (argc > 2) ? argv[2] : NULL; 1208 if (path == NULL) 1209 path = cwd; 1210 1211 o = fdt_path_offset(fdtp, path); 1212 if (o < 0) { 1213 snprintf(command_errbuf, sizeof(command_errbuf), 1214 "could not find node: '%s'", path); 1215 return (CMD_ERROR); 1216 } 1217 1218 for (depth = 0; 1219 (o >= 0) && (depth >= 0); 1220 o = fdt_next_node(fdtp, o, &depth)) { 1221 1222 name = fdt_get_name(fdtp, o, NULL); 1223 1224 if (depth > FDT_MAX_DEPTH) { 1225 printf("max depth exceeded: %d\n", depth); 1226 continue; 1227 } 1228 1229 prevname[depth] = name; 1230 1231 /* Skip root (i = 1) when printing devices */ 1232 for (i = 1; i <= depth; i++) { 1233 if (prevname[i] == NULL) 1234 break; 1235 1236 if (strcmp(cwd, "/") == 0) 1237 printf("/"); 1238 printf("%s", prevname[i]); 1239 } 1240 printf("\n"); 1241 } 1242 1243 return (CMD_OK); 1244 } 1245 1246 static __inline int 1247 isprint(int c) 1248 { 1249 1250 return (c >= ' ' && c <= 0x7e); 1251 } 1252 1253 static int 1254 fdt_isprint(const void *data, int len, int *count) 1255 { 1256 const char *d; 1257 char ch; 1258 int yesno, i; 1259 1260 if (len == 0) 1261 return (0); 1262 1263 d = (const char *)data; 1264 if (d[len - 1] != '\0') 1265 return (0); 1266 1267 *count = 0; 1268 yesno = 1; 1269 for (i = 0; i < len; i++) { 1270 ch = *(d + i); 1271 if (isprint(ch) || (ch == '\0' && i > 0)) { 1272 /* Count strings */ 1273 if (ch == '\0') 1274 (*count)++; 1275 continue; 1276 } 1277 1278 yesno = 0; 1279 break; 1280 } 1281 1282 return (yesno); 1283 } 1284 1285 static int 1286 fdt_data_str(const void *data, int len, int count, char **buf) 1287 { 1288 char *b, *tmp; 1289 const char *d; 1290 int buf_len, i, l; 1291 1292 /* 1293 * Calculate the length for the string and allocate memory. 1294 * 1295 * Note that 'len' already includes at least one terminator. 1296 */ 1297 buf_len = len; 1298 if (count > 1) { 1299 /* 1300 * Each token had already a terminator buried in 'len', but we 1301 * only need one eventually, don't count space for these. 1302 */ 1303 buf_len -= count - 1; 1304 1305 /* Each consecutive token requires a ", " separator. */ 1306 buf_len += count * 2; 1307 } 1308 1309 /* Add some space for surrounding double quotes. */ 1310 buf_len += count * 2; 1311 1312 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */ 1313 b = (char *)malloc(buf_len); 1314 tmp = (char *)malloc(buf_len); 1315 if (b == NULL) 1316 goto error; 1317 1318 if (tmp == NULL) { 1319 free(b); 1320 goto error; 1321 } 1322 1323 b[0] = '\0'; 1324 1325 /* 1326 * Now that we have space, format the string. 1327 */ 1328 i = 0; 1329 do { 1330 d = (const char *)data + i; 1331 l = strlen(d) + 1; 1332 1333 sprintf(tmp, "\"%s\"%s", d, 1334 (i + l) < len ? ", " : ""); 1335 strcat(b, tmp); 1336 1337 i += l; 1338 1339 } while (i < len); 1340 *buf = b; 1341 1342 free(tmp); 1343 1344 return (0); 1345 error: 1346 return (1); 1347 } 1348 1349 static int 1350 fdt_data_cell(const void *data, int len, char **buf) 1351 { 1352 char *b, *tmp; 1353 const uint32_t *c; 1354 int count, i, l; 1355 1356 /* Number of cells */ 1357 count = len / 4; 1358 1359 /* 1360 * Calculate the length for the string and allocate memory. 1361 */ 1362 1363 /* Each byte translates to 2 output characters */ 1364 l = len * 2; 1365 if (count > 1) { 1366 /* Each consecutive cell requires a " " separator. */ 1367 l += (count - 1) * 1; 1368 } 1369 /* Each cell will have a "0x" prefix */ 1370 l += count * 2; 1371 /* Space for surrounding <> and terminator */ 1372 l += 3; 1373 1374 b = (char *)malloc(l); 1375 tmp = (char *)malloc(l); 1376 if (b == NULL) 1377 goto error; 1378 1379 if (tmp == NULL) { 1380 free(b); 1381 goto error; 1382 } 1383 1384 b[0] = '\0'; 1385 strcat(b, "<"); 1386 1387 for (i = 0; i < len; i += 4) { 1388 c = (const uint32_t *)((const uint8_t *)data + i); 1389 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c), 1390 i < (len - 4) ? " " : ""); 1391 strcat(b, tmp); 1392 } 1393 strcat(b, ">"); 1394 *buf = b; 1395 1396 free(tmp); 1397 1398 return (0); 1399 error: 1400 return (1); 1401 } 1402 1403 static int 1404 fdt_data_bytes(const void *data, int len, char **buf) 1405 { 1406 char *b, *tmp; 1407 const char *d; 1408 int i, l; 1409 1410 /* 1411 * Calculate the length for the string and allocate memory. 1412 */ 1413 1414 /* Each byte translates to 2 output characters */ 1415 l = len * 2; 1416 if (len > 1) 1417 /* Each consecutive byte requires a " " separator. */ 1418 l += (len - 1) * 1; 1419 /* Each byte will have a "0x" prefix */ 1420 l += len * 2; 1421 /* Space for surrounding [] and terminator. */ 1422 l += 3; 1423 1424 b = (char *)malloc(l); 1425 tmp = (char *)malloc(l); 1426 if (b == NULL) 1427 goto error; 1428 1429 if (tmp == NULL) { 1430 free(b); 1431 goto error; 1432 } 1433 1434 b[0] = '\0'; 1435 strcat(b, "["); 1436 1437 for (i = 0, d = data; i < len; i++) { 1438 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : ""); 1439 strcat(b, tmp); 1440 } 1441 strcat(b, "]"); 1442 *buf = b; 1443 1444 free(tmp); 1445 1446 return (0); 1447 error: 1448 return (1); 1449 } 1450 1451 static int 1452 fdt_data_fmt(const void *data, int len, char **buf) 1453 { 1454 int count; 1455 1456 if (len == 0) { 1457 *buf = NULL; 1458 return (1); 1459 } 1460 1461 if (fdt_isprint(data, len, &count)) 1462 return (fdt_data_str(data, len, count, buf)); 1463 1464 else if ((len % 4) == 0) 1465 return (fdt_data_cell(data, len, buf)); 1466 1467 else 1468 return (fdt_data_bytes(data, len, buf)); 1469 } 1470 1471 static int 1472 fdt_prop(int offset) 1473 { 1474 char *line, *buf; 1475 const struct fdt_property *prop; 1476 const char *name; 1477 const void *data; 1478 int len, rv; 1479 1480 line = NULL; 1481 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop)); 1482 if (prop == NULL) 1483 return (1); 1484 1485 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)); 1486 len = fdt32_to_cpu(prop->len); 1487 1488 rv = 0; 1489 buf = NULL; 1490 if (len == 0) { 1491 /* Property without value */ 1492 line = (char *)malloc(strlen(name) + 2); 1493 if (line == NULL) { 1494 rv = 2; 1495 goto out2; 1496 } 1497 sprintf(line, "%s\n", name); 1498 goto out1; 1499 } 1500 1501 /* 1502 * Process property with value 1503 */ 1504 data = prop->data; 1505 1506 if (fdt_data_fmt(data, len, &buf) != 0) { 1507 rv = 3; 1508 goto out2; 1509 } 1510 1511 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) + 1512 strlen(buf) + 2); 1513 if (line == NULL) { 1514 sprintf(command_errbuf, "could not allocate space for string"); 1515 rv = 4; 1516 goto out2; 1517 } 1518 1519 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf); 1520 1521 out1: 1522 pager_open(); 1523 pager_output(line); 1524 pager_close(); 1525 1526 out2: 1527 if (buf) 1528 free(buf); 1529 1530 if (line) 1531 free(line); 1532 1533 return (rv); 1534 } 1535 1536 static int 1537 fdt_modprop(int nodeoff, char *propname, void *value, char mode) 1538 { 1539 uint32_t cells[100]; 1540 const char *buf; 1541 int len, rv; 1542 const struct fdt_property *p; 1543 1544 p = fdt_get_property(fdtp, nodeoff, propname, NULL); 1545 1546 if (p != NULL) { 1547 if (mode == 1) { 1548 /* Adding inexistant value in mode 1 is forbidden */ 1549 sprintf(command_errbuf, "property already exists!"); 1550 return (CMD_ERROR); 1551 } 1552 } else if (mode == 0) { 1553 sprintf(command_errbuf, "property does not exist!"); 1554 return (CMD_ERROR); 1555 } 1556 rv = 0; 1557 buf = value; 1558 1559 switch (*buf) { 1560 case '&': 1561 /* phandles */ 1562 break; 1563 case '<': 1564 /* Data cells */ 1565 len = fdt_strtovect(buf, (void *)&cells, 100, 1566 sizeof(uint32_t)); 1567 1568 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1569 len * sizeof(uint32_t)); 1570 break; 1571 case '[': 1572 /* Data bytes */ 1573 len = fdt_strtovect(buf, (void *)&cells, 100, 1574 sizeof(uint8_t)); 1575 1576 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1577 len * sizeof(uint8_t)); 1578 break; 1579 case '"': 1580 default: 1581 /* Default -- string */ 1582 rv = fdt_setprop_string(fdtp, nodeoff, propname, value); 1583 break; 1584 } 1585 1586 if (rv != 0) { 1587 if (rv == -FDT_ERR_NOSPACE) 1588 sprintf(command_errbuf, 1589 "Device tree blob is too small!\n"); 1590 else 1591 sprintf(command_errbuf, 1592 "Could not add/modify property!\n"); 1593 } 1594 return (rv); 1595 } 1596 1597 /* Merge strings from argv into a single string */ 1598 static int 1599 fdt_merge_strings(int argc, char *argv[], int start, char **buffer) 1600 { 1601 char *buf; 1602 int i, idx, sz; 1603 1604 *buffer = NULL; 1605 sz = 0; 1606 1607 for (i = start; i < argc; i++) 1608 sz += strlen(argv[i]); 1609 1610 /* Additional bytes for whitespaces between args */ 1611 sz += argc - start; 1612 1613 buf = (char *)malloc(sizeof(char) * sz); 1614 if (buf == NULL) { 1615 sprintf(command_errbuf, "could not allocate space " 1616 "for string"); 1617 return (1); 1618 } 1619 bzero(buf, sizeof(char) * sz); 1620 1621 idx = 0; 1622 for (i = start, idx = 0; i < argc; i++) { 1623 strcpy(buf + idx, argv[i]); 1624 idx += strlen(argv[i]); 1625 buf[idx] = ' '; 1626 idx++; 1627 } 1628 buf[sz - 1] = '\0'; 1629 *buffer = buf; 1630 return (0); 1631 } 1632 1633 /* Extract offset and name of node/property from a given path */ 1634 static int 1635 fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff) 1636 { 1637 int o; 1638 char *path = *pathp, *name = NULL, *subpath = NULL; 1639 1640 subpath = strrchr(path, '/'); 1641 if (subpath == NULL) { 1642 o = fdt_path_offset(fdtp, cwd); 1643 name = path; 1644 path = (char *)&cwd; 1645 } else { 1646 *subpath = '\0'; 1647 if (strlen(path) == 0) 1648 path = cwd; 1649 1650 name = subpath + 1; 1651 o = fdt_path_offset(fdtp, path); 1652 } 1653 1654 if (strlen(name) == 0) { 1655 sprintf(command_errbuf, "name not specified"); 1656 return (1); 1657 } 1658 if (o < 0) { 1659 snprintf(command_errbuf, sizeof(command_errbuf), 1660 "could not find node: '%s'", path); 1661 return (1); 1662 } 1663 *namep = name; 1664 *nodeoff = o; 1665 *pathp = path; 1666 return (0); 1667 } 1668 1669 static int 1670 fdt_cmd_prop(int argc, char *argv[]) 1671 { 1672 char *path, *propname, *value; 1673 int o, next, depth, rv; 1674 uint32_t tag; 1675 1676 path = (argc > 2) ? argv[2] : NULL; 1677 1678 value = NULL; 1679 1680 if (argc > 3) { 1681 /* Merge property value strings into one */ 1682 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1683 return (CMD_ERROR); 1684 } else 1685 value = NULL; 1686 1687 if (path == NULL) 1688 path = cwd; 1689 1690 rv = CMD_OK; 1691 1692 if (value) { 1693 /* If value is specified -- try to modify prop. */ 1694 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1695 return (CMD_ERROR); 1696 1697 rv = fdt_modprop(o, propname, value, 0); 1698 if (rv) 1699 return (CMD_ERROR); 1700 return (CMD_OK); 1701 1702 } 1703 /* User wants to display properties */ 1704 o = fdt_path_offset(fdtp, path); 1705 1706 if (o < 0) { 1707 snprintf(command_errbuf, sizeof(command_errbuf), 1708 "could not find node: '%s'", path); 1709 rv = CMD_ERROR; 1710 goto out; 1711 } 1712 1713 depth = 0; 1714 while (depth >= 0) { 1715 tag = fdt_next_tag(fdtp, o, &next); 1716 switch (tag) { 1717 case FDT_NOP: 1718 break; 1719 case FDT_PROP: 1720 if (depth > 1) 1721 /* Don't process properties of nested nodes */ 1722 break; 1723 1724 if (fdt_prop(o) != 0) { 1725 sprintf(command_errbuf, "could not process " 1726 "property"); 1727 rv = CMD_ERROR; 1728 goto out; 1729 } 1730 break; 1731 case FDT_BEGIN_NODE: 1732 depth++; 1733 if (depth > FDT_MAX_DEPTH) { 1734 printf("warning: nesting too deep: %d\n", 1735 depth); 1736 goto out; 1737 } 1738 break; 1739 case FDT_END_NODE: 1740 depth--; 1741 if (depth == 0) 1742 /* 1743 * This is the end of our starting node, force 1744 * the loop finish. 1745 */ 1746 depth--; 1747 break; 1748 } 1749 o = next; 1750 } 1751 out: 1752 return (rv); 1753 } 1754 1755 static int 1756 fdt_cmd_mkprop(int argc, char *argv[]) 1757 { 1758 int o; 1759 char *path, *propname, *value; 1760 1761 path = (argc > 2) ? argv[2] : NULL; 1762 1763 value = NULL; 1764 1765 if (argc > 3) { 1766 /* Merge property value strings into one */ 1767 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1768 return (CMD_ERROR); 1769 } else 1770 value = NULL; 1771 1772 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1773 return (CMD_ERROR); 1774 1775 if (fdt_modprop(o, propname, value, 1)) 1776 return (CMD_ERROR); 1777 1778 return (CMD_OK); 1779 } 1780 1781 static int 1782 fdt_cmd_rm(int argc, char *argv[]) 1783 { 1784 int o, rv; 1785 char *path = NULL, *propname; 1786 1787 if (argc > 2) 1788 path = argv[2]; 1789 else { 1790 sprintf(command_errbuf, "no node/property name specified"); 1791 return (CMD_ERROR); 1792 } 1793 1794 o = fdt_path_offset(fdtp, path); 1795 if (o < 0) { 1796 /* If node not found -- try to find & delete property */ 1797 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1798 return (CMD_ERROR); 1799 1800 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) { 1801 snprintf(command_errbuf, sizeof(command_errbuf), 1802 "could not delete %s\n", 1803 (rv == -FDT_ERR_NOTFOUND) ? 1804 "(property/node does not exist)" : ""); 1805 return (CMD_ERROR); 1806 1807 } else 1808 return (CMD_OK); 1809 } 1810 /* If node exists -- remove node */ 1811 rv = fdt_del_node(fdtp, o); 1812 if (rv) { 1813 sprintf(command_errbuf, "could not delete node"); 1814 return (CMD_ERROR); 1815 } 1816 return (CMD_OK); 1817 } 1818 1819 static int 1820 fdt_cmd_mknode(int argc, char *argv[]) 1821 { 1822 int o, rv; 1823 char *path = NULL, *nodename = NULL; 1824 1825 if (argc > 2) 1826 path = argv[2]; 1827 else { 1828 sprintf(command_errbuf, "no node name specified"); 1829 return (CMD_ERROR); 1830 } 1831 1832 if (fdt_extract_nameloc(&path, &nodename, &o) != 0) 1833 return (CMD_ERROR); 1834 1835 rv = fdt_add_subnode(fdtp, o, nodename); 1836 1837 if (rv < 0) { 1838 if (rv == -FDT_ERR_NOSPACE) 1839 sprintf(command_errbuf, 1840 "Device tree blob is too small!\n"); 1841 else 1842 sprintf(command_errbuf, 1843 "Could not add node!\n"); 1844 return (CMD_ERROR); 1845 } 1846 return (CMD_OK); 1847 } 1848 1849 static int 1850 fdt_cmd_pwd(int argc, char *argv[]) 1851 { 1852 char line[FDT_CWD_LEN]; 1853 1854 pager_open(); 1855 sprintf(line, "%s\n", cwd); 1856 pager_output(line); 1857 pager_close(); 1858 return (CMD_OK); 1859 } 1860 1861 static int 1862 fdt_cmd_mres(int argc, char *argv[]) 1863 { 1864 uint64_t start, size; 1865 int i, total; 1866 char line[80]; 1867 1868 pager_open(); 1869 total = fdt_num_mem_rsv(fdtp); 1870 if (total > 0) { 1871 if (pager_output("Reserved memory regions:\n")) 1872 goto out; 1873 for (i = 0; i < total; i++) { 1874 fdt_get_mem_rsv(fdtp, i, &start, &size); 1875 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n", 1876 i, start, size); 1877 if (pager_output(line)) 1878 goto out; 1879 } 1880 } else 1881 pager_output("No reserved memory regions\n"); 1882 out: 1883 pager_close(); 1884 1885 return (CMD_OK); 1886 } 1887 1888 static int 1889 fdt_cmd_nyi(int argc, char *argv[]) 1890 { 1891 1892 printf("command not yet implemented\n"); 1893 return (CMD_ERROR); 1894 } 1895 1896 const char * 1897 fdt_devmatch_next(int *tag, int *compatlen) 1898 { 1899 const struct fdt_property *p; 1900 const struct fdt_property *status; 1901 int o, len = -1; 1902 static int depth = 0; 1903 1904 if (fdtp == NULL) { 1905 fdt_setup_fdtp(); 1906 fdt_apply_overlays(); 1907 } 1908 1909 if (*tag != 0) { 1910 o = *tag; 1911 /* We are at the end of the DTB */ 1912 if (o < 0) 1913 return (NULL); 1914 } else { 1915 o = fdt_path_offset(fdtp, "/"); 1916 if (o < 0) { 1917 printf("Can't find dtb\n"); 1918 return (NULL); 1919 } 1920 depth = 0; 1921 } 1922 1923 /* Find the next node with a compatible property */ 1924 while (1) { 1925 p = NULL; 1926 if (o >= 0 && depth >= 0) { 1927 /* skip disabled nodes */ 1928 status = fdt_get_property(fdtp, o, "status", &len); 1929 if (len > 0) { 1930 if (strcmp(status->data, "disabled") == 0) { 1931 o = fdt_next_node(fdtp, o, &depth); 1932 if (o < 0) /* End of tree */ 1933 return (NULL); 1934 continue; 1935 } 1936 } 1937 1938 p = fdt_get_property(fdtp, o, "compatible", &len); 1939 } 1940 if (p) 1941 break; 1942 o = fdt_next_node(fdtp, o, &depth); 1943 if (o < 0) /* End of tree */ 1944 return (NULL); 1945 } 1946 1947 /* Prepare next node for next call */ 1948 o = fdt_next_node(fdtp, o, &depth); 1949 *tag = o; 1950 1951 if (len >= 0) { 1952 *compatlen = len; 1953 return (p->data); 1954 } 1955 return (NULL); 1956 } 1957