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