fdt_loader_cmd.c revision 275762
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: stable/10/sys/boot/fdt/fdt_loader_cmd.c 275762 2014-12-14 15:03:11Z andrew $"); 32 33#include <stand.h> 34#include <fdt.h> 35#include <libfdt.h> 36#include <sys/param.h> 37#include <sys/linker.h> 38#include <machine/elf.h> 39 40#include "bootstrap.h" 41#include "glue.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 6 52 53#define FDT_PROP_SEP " = " 54 55#define STR(number) #number 56#define STRINGIFY(number) STR(number) 57 58#define COPYOUT(s,d,l) archsw.arch_copyout(s, d, l) 59#define COPYIN(s,d,l) archsw.arch_copyin(s, d, l) 60 61#define FDT_STATIC_DTB_SYMBOL "fdt_static_dtb" 62 63#define CMD_REQUIRES_BLOB 0x01 64 65/* Location of FDT yet to be loaded. */ 66/* This may be in read-only memory, so can't be manipulated directly. */ 67static struct fdt_header *fdt_to_load = NULL; 68/* Location of FDT on heap. */ 69/* This is the copy we actually manipulate. */ 70static struct fdt_header *fdtp = NULL; 71/* Size of FDT blob */ 72static size_t fdtp_size = 0; 73/* Location of FDT in kernel or module. */ 74/* This won't be set if FDT is loaded from disk or memory. */ 75/* If it is set, we'll update it when fdt_copy() gets called. */ 76static vm_offset_t fdtp_va = 0; 77 78static int fdt_load_dtb(vm_offset_t va); 79 80static int fdt_cmd_nyi(int argc, char *argv[]); 81 82static int fdt_cmd_addr(int argc, char *argv[]); 83static int fdt_cmd_mkprop(int argc, char *argv[]); 84static int fdt_cmd_cd(int argc, char *argv[]); 85static int fdt_cmd_hdr(int argc, char *argv[]); 86static int fdt_cmd_ls(int argc, char *argv[]); 87static int fdt_cmd_prop(int argc, char *argv[]); 88static int fdt_cmd_pwd(int argc, char *argv[]); 89static int fdt_cmd_rm(int argc, char *argv[]); 90static int fdt_cmd_mknode(int argc, char *argv[]); 91static int fdt_cmd_mres(int argc, char *argv[]); 92 93typedef int cmdf_t(int, char *[]); 94 95struct cmdtab { 96 const char *name; 97 cmdf_t *handler; 98 int flags; 99}; 100 101static const struct cmdtab commands[] = { 102 { "addr", &fdt_cmd_addr, 0 }, 103 { "alias", &fdt_cmd_nyi, 0 }, 104 { "cd", &fdt_cmd_cd, CMD_REQUIRES_BLOB }, 105 { "header", &fdt_cmd_hdr, CMD_REQUIRES_BLOB }, 106 { "ls", &fdt_cmd_ls, CMD_REQUIRES_BLOB }, 107 { "mknode", &fdt_cmd_mknode, CMD_REQUIRES_BLOB }, 108 { "mkprop", &fdt_cmd_mkprop, CMD_REQUIRES_BLOB }, 109 { "mres", &fdt_cmd_mres, CMD_REQUIRES_BLOB }, 110 { "prop", &fdt_cmd_prop, CMD_REQUIRES_BLOB }, 111 { "pwd", &fdt_cmd_pwd, CMD_REQUIRES_BLOB }, 112 { "rm", &fdt_cmd_rm, CMD_REQUIRES_BLOB }, 113 { NULL, NULL } 114}; 115 116static char cwd[FDT_CWD_LEN] = "/"; 117 118static vm_offset_t 119fdt_find_static_dtb() 120{ 121 Elf_Ehdr *ehdr; 122 Elf_Shdr *shdr; 123 Elf_Sym sym; 124 vm_offset_t strtab, symtab, fdt_start; 125 uint64_t offs; 126 struct preloaded_file *kfp; 127 struct file_metadata *md; 128 char *strp; 129 int i, sym_count; 130 131 debugf("fdt_find_static_dtb()\n"); 132 133 sym_count = symtab = strtab = 0; 134 strp = NULL; 135 136 offs = __elfN(relocation_offset); 137 138 kfp = file_findfile(NULL, NULL); 139 if (kfp == NULL) 140 return (0); 141 142 /* Locate the dynamic symbols and strtab. */ 143 md = file_findmetadata(kfp, MODINFOMD_ELFHDR); 144 if (md == NULL) 145 return (0); 146 ehdr = (Elf_Ehdr *)md->md_data; 147 148 md = file_findmetadata(kfp, MODINFOMD_SHDR); 149 if (md == NULL) 150 return (0); 151 shdr = (Elf_Shdr *)md->md_data; 152 153 for (i = 0; i < ehdr->e_shnum; ++i) { 154 if (shdr[i].sh_type == SHT_DYNSYM && symtab == 0) { 155 symtab = shdr[i].sh_addr + offs; 156 sym_count = shdr[i].sh_size / sizeof(Elf_Sym); 157 } else if (shdr[i].sh_type == SHT_STRTAB && strtab == 0) { 158 strtab = shdr[i].sh_addr + offs; 159 } 160 } 161 162 /* 163 * The most efficent way to find a symbol would be to calculate a 164 * hash, find proper bucket and chain, and thus find a symbol. 165 * However, that would involve code duplication (e.g. for hash 166 * function). So we're using simpler and a bit slower way: we're 167 * iterating through symbols, searching for the one which name is 168 * 'equal' to 'fdt_static_dtb'. To speed up the process a little bit, 169 * we are eliminating symbols type of which is not STT_NOTYPE, or(and) 170 * those which binding attribute is not STB_GLOBAL. 171 */ 172 fdt_start = 0; 173 while (sym_count > 0 && fdt_start == 0) { 174 COPYOUT(symtab, &sym, sizeof(sym)); 175 symtab += sizeof(sym); 176 --sym_count; 177 if (ELF_ST_BIND(sym.st_info) != STB_GLOBAL || 178 ELF_ST_TYPE(sym.st_info) != STT_NOTYPE) 179 continue; 180 strp = strdupout(strtab + sym.st_name); 181 if (strcmp(strp, FDT_STATIC_DTB_SYMBOL) == 0) 182 fdt_start = (vm_offset_t)sym.st_value + offs; 183 free(strp); 184 } 185 return (fdt_start); 186} 187 188static int 189fdt_load_dtb(vm_offset_t va) 190{ 191 struct fdt_header header; 192 int err; 193 194 debugf("fdt_load_dtb(0x%08jx)\n", (uintmax_t)va); 195 196 COPYOUT(va, &header, sizeof(header)); 197 err = fdt_check_header(&header); 198 if (err < 0) { 199 if (err == -FDT_ERR_BADVERSION) 200 sprintf(command_errbuf, 201 "incompatible blob version: %d, should be: %d", 202 fdt_version(fdtp), FDT_LAST_SUPPORTED_VERSION); 203 204 else 205 sprintf(command_errbuf, "error validating blob: %s", 206 fdt_strerror(err)); 207 return (1); 208 } 209 210 /* 211 * Release previous blob 212 */ 213 if (fdtp) 214 free(fdtp); 215 216 fdtp_size = fdt_totalsize(&header); 217 fdtp = malloc(fdtp_size); 218 219 if (fdtp == NULL) { 220 command_errmsg = "can't allocate memory for device tree copy"; 221 return (1); 222 } 223 224 fdtp_va = va; 225 COPYOUT(va, fdtp, fdtp_size); 226 debugf("DTB blob found at 0x%jx, size: 0x%jx\n", (uintmax_t)va, (uintmax_t)fdtp_size); 227 228 return (0); 229} 230 231static int 232fdt_load_dtb_addr(struct fdt_header *header) 233{ 234 int err; 235 236 debugf("fdt_load_dtb_addr(0x%p)\n", header); 237 238 fdtp_size = fdt_totalsize(header); 239 err = fdt_check_header(header); 240 if (err < 0) { 241 sprintf(command_errbuf, "error validating blob: %s", 242 fdt_strerror(err)); 243 return (err); 244 } 245 free(fdtp); 246 if ((fdtp = malloc(fdtp_size)) == NULL) { 247 command_errmsg = "can't allocate memory for device tree copy"; 248 return (1); 249 } 250 251 fdtp_va = 0; // Don't write this back into module or kernel. 252 bcopy(header, fdtp, fdtp_size); 253 return (0); 254} 255 256static int 257fdt_load_dtb_file(const char * filename) 258{ 259 struct preloaded_file *bfp, *oldbfp; 260 int err; 261 262 debugf("fdt_load_dtb_file(%s)\n", filename); 263 264 oldbfp = file_findfile(NULL, "dtb"); 265 266 /* Attempt to load and validate a new dtb from a file. */ 267 if ((bfp = file_loadraw(filename, "dtb")) == NULL) { 268 sprintf(command_errbuf, "failed to load file '%s'", filename); 269 return (1); 270 } 271 if ((err = fdt_load_dtb(bfp->f_addr)) != 0) { 272 file_discard(bfp); 273 return (err); 274 } 275 276 /* A new dtb was validated, discard any previous file. */ 277 if (oldbfp) 278 file_discard(oldbfp); 279 return (0); 280} 281 282int 283fdt_setup_fdtp() 284{ 285 struct preloaded_file *bfp; 286 struct fdt_header *hdr; 287 const char *s; 288 char *p; 289 vm_offset_t va; 290 291 debugf("fdt_setup_fdtp()\n"); 292 293 /* If we already loaded a file, use it. */ 294 if ((bfp = file_findfile(NULL, "dtb")) != NULL) { 295 if (fdt_load_dtb(bfp->f_addr) == 0) { 296 printf("Using DTB from loaded file '%s'.\n", 297 bfp->f_name); 298 return (0); 299 } 300 } 301 302 /* If we were given the address of a valid blob in memory, use it. */ 303 if (fdt_to_load != NULL) { 304 if (fdt_load_dtb_addr(fdt_to_load) == 0) { 305 printf("Using DTB from memory address 0x%08X.\n", 306 (unsigned int)fdt_to_load); 307 return (0); 308 } 309 } 310 311 /* 312 * If the U-boot environment contains a variable giving the address of a 313 * valid blob in memory, use it. The U-boot README says the right 314 * variable for fdt data loaded into ram is fdt_addr_r, so try that 315 * first. Board vendors also use both fdtaddr and fdt_addr names. 316 */ 317 s = ub_env_get("fdt_addr_r"); 318 if (s == NULL) 319 s = ub_env_get("fdtaddr"); 320 if (s == NULL) 321 s = ub_env_get("fdt_addr"); 322 if (s != NULL && *s != '\0') { 323 hdr = (struct fdt_header *)strtoul(s, &p, 16); 324 if (*p == '\0') { 325 if (fdt_load_dtb_addr(hdr) == 0) { 326 printf("Using DTB provided by U-Boot at " 327 "address 0x%p.\n", hdr); 328 return (0); 329 } 330 } 331 } 332 333 /* 334 * If the U-boot environment contains a variable giving the name of a 335 * file, use it if we can load and validate it. 336 */ 337 s = ub_env_get("fdtfile"); 338 if (s == NULL) 339 s = ub_env_get("fdt_file"); 340 if (s != NULL && *s != '\0') { 341 if (fdt_load_dtb_file(s) == 0) { 342 printf("Loaded DTB from file '%s'.\n", s); 343 return (0); 344 } 345 } 346 347 /* If there is a dtb compiled into the kernel, use it. */ 348 if ((va = fdt_find_static_dtb()) != 0) { 349 if (fdt_load_dtb(va) == 0) { 350 printf("Using DTB compiled into kernel.\n"); 351 return (0); 352 } 353 } 354 355 command_errmsg = "No device tree blob found!\n"; 356 return (1); 357} 358 359#define fdt_strtovect(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 360 (cellbuf), (lim), (cellsize), 0); 361 362/* Force using base 16 */ 363#define fdt_strtovectx(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 364 (cellbuf), (lim), (cellsize), 16); 365 366static int 367_fdt_strtovect(const char *str, void *cellbuf, int lim, unsigned char cellsize, 368 uint8_t base) 369{ 370 const char *buf = str; 371 const char *end = str + strlen(str) - 2; 372 uint32_t *u32buf = NULL; 373 uint8_t *u8buf = NULL; 374 int cnt = 0; 375 376 if (cellsize == sizeof(uint32_t)) 377 u32buf = (uint32_t *)cellbuf; 378 else 379 u8buf = (uint8_t *)cellbuf; 380 381 if (lim == 0) 382 return (0); 383 384 while (buf < end) { 385 386 /* Skip white whitespace(s)/separators */ 387 while (!isxdigit(*buf) && buf < end) 388 buf++; 389 390 if (u32buf != NULL) 391 u32buf[cnt] = 392 cpu_to_fdt32((uint32_t)strtol(buf, NULL, base)); 393 394 else 395 u8buf[cnt] = (uint8_t)strtol(buf, NULL, base); 396 397 if (cnt + 1 <= lim - 1) 398 cnt++; 399 else 400 break; 401 buf++; 402 /* Find another number */ 403 while ((isxdigit(*buf) || *buf == 'x') && buf < end) 404 buf++; 405 } 406 return (cnt); 407} 408 409#define TMP_MAX_ETH 8 410 411static void 412fixup_ethernet(const char *env, char *ethstr, int *eth_no, int len) 413{ 414 const char *str; 415 char *end; 416 uint8_t tmp_addr[6]; 417 int i, n; 418 419 /* Extract interface number */ 420 i = strtol(env + 3, &end, 10); 421 if (end == (env + 3)) 422 /* 'ethaddr' means interface 0 address */ 423 n = 0; 424 else 425 n = i; 426 427 if (n > TMP_MAX_ETH) 428 return; 429 430 str = ub_env_get(env); 431 432 /* Convert macaddr string into a vector of uints */ 433 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t)); 434 if (n != 0) { 435 i = strlen(env) - 7; 436 strncpy(ethstr + 8, env + 3, i); 437 } 438 /* Set actual property to a value from vect */ 439 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr), 440 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t)); 441 442 /* Clear ethernet..XXXX.. string */ 443 bzero(ethstr + 8, len - 8); 444 445 if (n + 1 > *eth_no) 446 *eth_no = n + 1; 447} 448 449static void 450fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq) 451{ 452 int lo, o = 0, o2, maxo = 0, depth; 453 const uint32_t zero = 0; 454 455 /* We want to modify every subnode of /cpus */ 456 o = fdt_path_offset(fdtp, "/cpus"); 457 if (o < 0) 458 return; 459 460 /* maxo should contain offset of node next to /cpus */ 461 depth = 0; 462 maxo = o; 463 while (depth != -1) 464 maxo = fdt_next_node(fdtp, maxo, &depth); 465 466 /* Find CPU frequency properties */ 467 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency", 468 &zero, sizeof(uint32_t)); 469 470 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero, 471 sizeof(uint32_t)); 472 473 lo = MIN(o, o2); 474 475 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) { 476 477 o = fdt_node_offset_by_prop_value(fdtp, lo, 478 "clock-frequency", &zero, sizeof(uint32_t)); 479 480 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency", 481 &zero, sizeof(uint32_t)); 482 483 /* We're only interested in /cpus subnode(s) */ 484 if (lo > maxo) 485 break; 486 487 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency", 488 (uint32_t)cpufreq); 489 490 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency", 491 (uint32_t)busfreq); 492 493 lo = MIN(o, o2); 494 } 495} 496 497static int 498fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells) 499{ 500 int cells_in_tuple, i, tuples, tuple_size; 501 uint32_t cur_start, cur_size; 502 503 cells_in_tuple = (addr_cells + size_cells); 504 tuple_size = cells_in_tuple * sizeof(uint32_t); 505 tuples = len / tuple_size; 506 if (tuples == 0) 507 return (EINVAL); 508 509 for (i = 0; i < tuples; i++) { 510 if (addr_cells == 2) 511 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]); 512 else 513 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]); 514 515 if (size_cells == 2) 516 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]); 517 else 518 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]); 519 520 if (cur_size == 0) 521 return (EINVAL); 522 523 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n", 524 i, cur_start, cur_size); 525 } 526 return (0); 527} 528 529static void 530fixup_memory(struct sys_info *si) 531{ 532 struct mem_region *curmr; 533 uint32_t addr_cells, size_cells; 534 uint32_t *addr_cellsp, *reg, *size_cellsp; 535 int err, i, len, memory, realmrno, root; 536 uint8_t *buf, *sb; 537 uint64_t rstart, rsize; 538 int reserved; 539 540 root = fdt_path_offset(fdtp, "/"); 541 if (root < 0) { 542 sprintf(command_errbuf, "Could not find root node !"); 543 return; 544 } 545 546 memory = fdt_path_offset(fdtp, "/memory"); 547 if (memory <= 0) { 548 /* Create proper '/memory' node. */ 549 memory = fdt_add_subnode(fdtp, root, "memory"); 550 if (memory <= 0) { 551 sprintf(command_errbuf, "Could not fixup '/memory' " 552 "node, error code : %d!\n", memory); 553 return; 554 } 555 556 err = fdt_setprop(fdtp, memory, "device_type", "memory", 557 sizeof("memory")); 558 559 if (err < 0) 560 return; 561 } 562 563 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells", 564 NULL); 565 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL); 566 567 if (addr_cellsp == NULL || size_cellsp == NULL) { 568 sprintf(command_errbuf, "Could not fixup '/memory' node : " 569 "%s %s property not found in root node!\n", 570 (!addr_cellsp) ? "#address-cells" : "", 571 (!size_cellsp) ? "#size-cells" : ""); 572 return; 573 } 574 575 addr_cells = fdt32_to_cpu(*addr_cellsp); 576 size_cells = fdt32_to_cpu(*size_cellsp); 577 578 /* 579 * Convert memreserve data to memreserve property 580 * Check if property already exists 581 */ 582 reserved = fdt_num_mem_rsv(fdtp); 583 if (reserved && 584 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) { 585 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t); 586 sb = buf = (uint8_t *)malloc(len); 587 if (!buf) 588 return; 589 590 bzero(buf, len); 591 592 for (i = 0; i < reserved; i++) { 593 curmr = &si->mr[i]; 594 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize)) 595 break; 596 if (rsize) { 597 /* Ensure endianess, and put cells into a buffer */ 598 if (addr_cells == 2) 599 *(uint64_t *)buf = 600 cpu_to_fdt64(rstart); 601 else 602 *(uint32_t *)buf = 603 cpu_to_fdt32(rstart); 604 605 buf += sizeof(uint32_t) * addr_cells; 606 if (size_cells == 2) 607 *(uint64_t *)buf = 608 cpu_to_fdt64(rsize); 609 else 610 *(uint32_t *)buf = 611 cpu_to_fdt32(rsize); 612 613 buf += sizeof(uint32_t) * size_cells; 614 } 615 } 616 617 /* Set property */ 618 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0) 619 printf("Could not fixup 'memreserve' property.\n"); 620 621 free(sb); 622 } 623 624 /* Count valid memory regions entries in sysinfo. */ 625 realmrno = si->mr_no; 626 for (i = 0; i < si->mr_no; i++) 627 if (si->mr[i].start == 0 && si->mr[i].size == 0) 628 realmrno--; 629 630 if (realmrno == 0) { 631 sprintf(command_errbuf, "Could not fixup '/memory' node : " 632 "sysinfo doesn't contain valid memory regions info!\n"); 633 return; 634 } 635 636 if ((reg = (uint32_t *)fdt_getprop(fdtp, memory, "reg", 637 &len)) != NULL) { 638 639 if (fdt_reg_valid(reg, len, addr_cells, size_cells) == 0) 640 /* 641 * Do not apply fixup if existing 'reg' property 642 * seems to be valid. 643 */ 644 return; 645 } 646 647 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t); 648 sb = buf = (uint8_t *)malloc(len); 649 if (!buf) 650 return; 651 652 bzero(buf, len); 653 654 for (i = 0; i < si->mr_no; i++) { 655 curmr = &si->mr[i]; 656 if (curmr->size != 0) { 657 /* Ensure endianess, and put cells into a buffer */ 658 if (addr_cells == 2) 659 *(uint64_t *)buf = 660 cpu_to_fdt64(curmr->start); 661 else 662 *(uint32_t *)buf = 663 cpu_to_fdt32(curmr->start); 664 665 buf += sizeof(uint32_t) * addr_cells; 666 if (size_cells == 2) 667 *(uint64_t *)buf = 668 cpu_to_fdt64(curmr->size); 669 else 670 *(uint32_t *)buf = 671 cpu_to_fdt32(curmr->size); 672 673 buf += sizeof(uint32_t) * size_cells; 674 } 675 } 676 677 /* Set property */ 678 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0) 679 sprintf(command_errbuf, "Could not fixup '/memory' node.\n"); 680 681 free(sb); 682} 683 684static void 685fixup_stdout(const char *env) 686{ 687 const char *str; 688 char *ptr; 689 int serialno; 690 int len, no, sero; 691 const struct fdt_property *prop; 692 char *tmp[10]; 693 694 str = ub_env_get(env); 695 ptr = (char *)str + strlen(str) - 1; 696 while (ptr > str && isdigit(*(str - 1))) 697 str--; 698 699 if (ptr == str) 700 return; 701 702 serialno = (int)strtol(ptr, NULL, 0); 703 no = fdt_path_offset(fdtp, "/chosen"); 704 if (no < 0) 705 return; 706 707 prop = fdt_get_property(fdtp, no, "stdout", &len); 708 709 /* If /chosen/stdout does not extist, create it */ 710 if (prop == NULL || (prop != NULL && len == 0)) { 711 712 bzero(tmp, 10 * sizeof(char)); 713 strcpy((char *)&tmp, "serial"); 714 if (strlen(ptr) > 3) 715 /* Serial number too long */ 716 return; 717 718 strncpy((char *)tmp + 6, ptr, 3); 719 sero = fdt_path_offset(fdtp, (const char *)tmp); 720 if (sero < 0) 721 /* 722 * If serial device we're trying to assign 723 * stdout to doesn't exist in DT -- return. 724 */ 725 return; 726 727 fdt_setprop(fdtp, no, "stdout", &tmp, 728 strlen((char *)&tmp) + 1); 729 fdt_setprop(fdtp, no, "stdin", &tmp, 730 strlen((char *)&tmp) + 1); 731 } 732} 733 734/* 735 * Locate the blob, fix it up and return its location. 736 */ 737static int 738fdt_fixup(void) 739{ 740 const char *env; 741 char *ethstr; 742 int chosen, eth_no, len; 743 struct sys_info *si; 744 745 env = NULL; 746 eth_no = 0; 747 ethstr = NULL; 748 len = 0; 749 750 debugf("fdt_fixup()\n"); 751 752 if (fdtp == NULL && fdt_setup_fdtp() != 0) 753 return (0); 754 755 /* Create /chosen node (if not exists) */ 756 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) == 757 -FDT_ERR_NOTFOUND) 758 chosen = fdt_add_subnode(fdtp, 0, "chosen"); 759 760 /* Value assigned to fixup-applied does not matter. */ 761 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL)) 762 return (1); 763 764 /* Acquire sys_info */ 765 si = ub_get_sys_info(); 766 767 while ((env = ub_env_enum(env)) != NULL) { 768 if (strncmp(env, "eth", 3) == 0 && 769 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) { 770 /* 771 * Handle Ethernet addrs: parse uboot env eth%daddr 772 */ 773 774 if (!eth_no) { 775 /* 776 * Check how many chars we will need to store 777 * maximal eth iface number. 778 */ 779 len = strlen(STRINGIFY(TMP_MAX_ETH)) + 780 strlen("ethernet"); 781 782 /* 783 * Reserve mem for string "ethernet" and len 784 * chars for iface no. 785 */ 786 ethstr = (char *)malloc(len * sizeof(char)); 787 bzero(ethstr, len * sizeof(char)); 788 strcpy(ethstr, "ethernet0"); 789 } 790 791 /* Modify blob */ 792 fixup_ethernet(env, ethstr, ð_no, len); 793 794 } else if (strcmp(env, "consoledev") == 0) 795 fixup_stdout(env); 796 } 797 798 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */ 799 fixup_cpubusfreqs(si->clk_cpu, si->clk_bus); 800 801 /* Fixup memory regions */ 802 fixup_memory(si); 803 804 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0); 805 return (1); 806} 807 808/* 809 * Copy DTB blob to specified location and return size 810 */ 811int 812fdt_copy(vm_offset_t va) 813{ 814 int err; 815 debugf("fdt_copy va 0x%08x\n", va); 816 if (fdtp == NULL) { 817 err = fdt_setup_fdtp(); 818 if (err) { 819 printf("No valid device tree blob found!\n"); 820 return (0); 821 } 822 } 823 824 if (fdt_fixup() == 0) 825 return (0); 826 827 if (fdtp_va != 0) { 828 /* Overwrite the FDT with the fixed version. */ 829 /* XXX Is this really appropriate? */ 830 COPYIN(fdtp, fdtp_va, fdtp_size); 831 } 832 COPYIN(fdtp, va, fdtp_size); 833 return (fdtp_size); 834} 835 836 837 838int 839command_fdt_internal(int argc, char *argv[]) 840{ 841 cmdf_t *cmdh; 842 int flags; 843 char *cmd; 844 int i, err; 845 846 if (argc < 2) { 847 command_errmsg = "usage is 'fdt <command> [<args>]"; 848 return (CMD_ERROR); 849 } 850 851 /* 852 * Validate fdt <command>. 853 */ 854 cmd = strdup(argv[1]); 855 i = 0; 856 cmdh = NULL; 857 while (!(commands[i].name == NULL)) { 858 if (strcmp(cmd, commands[i].name) == 0) { 859 /* found it */ 860 cmdh = commands[i].handler; 861 flags = commands[i].flags; 862 break; 863 } 864 i++; 865 } 866 if (cmdh == NULL) { 867 command_errmsg = "unknown command"; 868 return (CMD_ERROR); 869 } 870 871 if (flags & CMD_REQUIRES_BLOB) { 872 /* 873 * Check if uboot env vars were parsed already. If not, do it now. 874 */ 875 if (fdt_fixup() == 0) 876 return (CMD_ERROR); 877 } 878 879 /* 880 * Call command handler. 881 */ 882 err = (*cmdh)(argc, argv); 883 884 return (err); 885} 886 887static int 888fdt_cmd_addr(int argc, char *argv[]) 889{ 890 struct preloaded_file *fp; 891 struct fdt_header *hdr; 892 const char *addr; 893 char *cp; 894 895 fdt_to_load = NULL; 896 897 if (argc > 2) 898 addr = argv[2]; 899 else { 900 sprintf(command_errbuf, "no address specified"); 901 return (CMD_ERROR); 902 } 903 904 hdr = (struct fdt_header *)strtoul(addr, &cp, 16); 905 if (cp == addr) { 906 sprintf(command_errbuf, "Invalid address: %s", addr); 907 return (CMD_ERROR); 908 } 909 910 while ((fp = file_findfile(NULL, "dtb")) != NULL) { 911 file_discard(fp); 912 } 913 914 fdt_to_load = hdr; 915 return (CMD_OK); 916} 917 918static int 919fdt_cmd_cd(int argc, char *argv[]) 920{ 921 char *path; 922 char tmp[FDT_CWD_LEN]; 923 int len, o; 924 925 path = (argc > 2) ? argv[2] : "/"; 926 927 if (path[0] == '/') { 928 len = strlen(path); 929 if (len >= FDT_CWD_LEN) 930 goto fail; 931 } else { 932 /* Handle path specification relative to cwd */ 933 len = strlen(cwd) + strlen(path) + 1; 934 if (len >= FDT_CWD_LEN) 935 goto fail; 936 937 strcpy(tmp, cwd); 938 strcat(tmp, "/"); 939 strcat(tmp, path); 940 path = tmp; 941 } 942 943 o = fdt_path_offset(fdtp, path); 944 if (o < 0) { 945 sprintf(command_errbuf, "could not find node: '%s'", path); 946 return (CMD_ERROR); 947 } 948 949 strcpy(cwd, path); 950 return (CMD_OK); 951 952fail: 953 sprintf(command_errbuf, "path too long: %d, max allowed: %d", 954 len, FDT_CWD_LEN - 1); 955 return (CMD_ERROR); 956} 957 958static int 959fdt_cmd_hdr(int argc __unused, char *argv[] __unused) 960{ 961 char line[80]; 962 int ver; 963 964 if (fdtp == NULL) { 965 command_errmsg = "no device tree blob pointer?!"; 966 return (CMD_ERROR); 967 } 968 969 ver = fdt_version(fdtp); 970 pager_open(); 971 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp); 972 pager_output(line); 973 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp)); 974 pager_output(line); 975 sprintf(line, " size = %d\n", fdt_totalsize(fdtp)); 976 pager_output(line); 977 sprintf(line, " off_dt_struct = 0x%08x\n", 978 fdt_off_dt_struct(fdtp)); 979 pager_output(line); 980 sprintf(line, " off_dt_strings = 0x%08x\n", 981 fdt_off_dt_strings(fdtp)); 982 pager_output(line); 983 sprintf(line, " off_mem_rsvmap = 0x%08x\n", 984 fdt_off_mem_rsvmap(fdtp)); 985 pager_output(line); 986 sprintf(line, " version = %d\n", ver); 987 pager_output(line); 988 sprintf(line, " last compatible version = %d\n", 989 fdt_last_comp_version(fdtp)); 990 pager_output(line); 991 if (ver >= 2) { 992 sprintf(line, " boot_cpuid = %d\n", 993 fdt_boot_cpuid_phys(fdtp)); 994 pager_output(line); 995 } 996 if (ver >= 3) { 997 sprintf(line, " size_dt_strings = %d\n", 998 fdt_size_dt_strings(fdtp)); 999 pager_output(line); 1000 } 1001 if (ver >= 17) { 1002 sprintf(line, " size_dt_struct = %d\n", 1003 fdt_size_dt_struct(fdtp)); 1004 pager_output(line); 1005 } 1006 pager_close(); 1007 1008 return (CMD_OK); 1009} 1010 1011static int 1012fdt_cmd_ls(int argc, char *argv[]) 1013{ 1014 const char *prevname[FDT_MAX_DEPTH] = { NULL }; 1015 const char *name; 1016 char *path; 1017 int i, o, depth, len; 1018 1019 path = (argc > 2) ? argv[2] : NULL; 1020 if (path == NULL) 1021 path = cwd; 1022 1023 o = fdt_path_offset(fdtp, path); 1024 if (o < 0) { 1025 sprintf(command_errbuf, "could not find node: '%s'", path); 1026 return (CMD_ERROR); 1027 } 1028 1029 for (depth = 0; 1030 (o >= 0) && (depth >= 0); 1031 o = fdt_next_node(fdtp, o, &depth)) { 1032 1033 name = fdt_get_name(fdtp, o, &len); 1034 1035 if (depth > FDT_MAX_DEPTH) { 1036 printf("max depth exceeded: %d\n", depth); 1037 continue; 1038 } 1039 1040 prevname[depth] = name; 1041 1042 /* Skip root (i = 1) when printing devices */ 1043 for (i = 1; i <= depth; i++) { 1044 if (prevname[i] == NULL) 1045 break; 1046 1047 if (strcmp(cwd, "/") == 0) 1048 printf("/"); 1049 printf("%s", prevname[i]); 1050 } 1051 printf("\n"); 1052 } 1053 1054 return (CMD_OK); 1055} 1056 1057static __inline int 1058isprint(int c) 1059{ 1060 1061 return (c >= ' ' && c <= 0x7e); 1062} 1063 1064static int 1065fdt_isprint(const void *data, int len, int *count) 1066{ 1067 const char *d; 1068 char ch; 1069 int yesno, i; 1070 1071 if (len == 0) 1072 return (0); 1073 1074 d = (const char *)data; 1075 if (d[len - 1] != '\0') 1076 return (0); 1077 1078 *count = 0; 1079 yesno = 1; 1080 for (i = 0; i < len; i++) { 1081 ch = *(d + i); 1082 if (isprint(ch) || (ch == '\0' && i > 0)) { 1083 /* Count strings */ 1084 if (ch == '\0') 1085 (*count)++; 1086 continue; 1087 } 1088 1089 yesno = 0; 1090 break; 1091 } 1092 1093 return (yesno); 1094} 1095 1096static int 1097fdt_data_str(const void *data, int len, int count, char **buf) 1098{ 1099 char *b, *tmp; 1100 const char *d; 1101 int buf_len, i, l; 1102 1103 /* 1104 * Calculate the length for the string and allocate memory. 1105 * 1106 * Note that 'len' already includes at least one terminator. 1107 */ 1108 buf_len = len; 1109 if (count > 1) { 1110 /* 1111 * Each token had already a terminator buried in 'len', but we 1112 * only need one eventually, don't count space for these. 1113 */ 1114 buf_len -= count - 1; 1115 1116 /* Each consecutive token requires a ", " separator. */ 1117 buf_len += count * 2; 1118 } 1119 1120 /* Add some space for surrounding double quotes. */ 1121 buf_len += count * 2; 1122 1123 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */ 1124 b = (char *)malloc(buf_len); 1125 tmp = (char *)malloc(buf_len); 1126 if (b == NULL) 1127 goto error; 1128 1129 if (tmp == NULL) { 1130 free(b); 1131 goto error; 1132 } 1133 1134 b[0] = '\0'; 1135 1136 /* 1137 * Now that we have space, format the string. 1138 */ 1139 i = 0; 1140 do { 1141 d = (const char *)data + i; 1142 l = strlen(d) + 1; 1143 1144 sprintf(tmp, "\"%s\"%s", d, 1145 (i + l) < len ? ", " : ""); 1146 strcat(b, tmp); 1147 1148 i += l; 1149 1150 } while (i < len); 1151 *buf = b; 1152 1153 free(tmp); 1154 1155 return (0); 1156error: 1157 return (1); 1158} 1159 1160static int 1161fdt_data_cell(const void *data, int len, char **buf) 1162{ 1163 char *b, *tmp; 1164 const uint32_t *c; 1165 int count, i, l; 1166 1167 /* Number of cells */ 1168 count = len / 4; 1169 1170 /* 1171 * Calculate the length for the string and allocate memory. 1172 */ 1173 1174 /* Each byte translates to 2 output characters */ 1175 l = len * 2; 1176 if (count > 1) { 1177 /* Each consecutive cell requires a " " separator. */ 1178 l += (count - 1) * 1; 1179 } 1180 /* Each cell will have a "0x" prefix */ 1181 l += count * 2; 1182 /* Space for surrounding <> and terminator */ 1183 l += 3; 1184 1185 b = (char *)malloc(l); 1186 tmp = (char *)malloc(l); 1187 if (b == NULL) 1188 goto error; 1189 1190 if (tmp == NULL) { 1191 free(b); 1192 goto error; 1193 } 1194 1195 b[0] = '\0'; 1196 strcat(b, "<"); 1197 1198 for (i = 0; i < len; i += 4) { 1199 c = (const uint32_t *)((const uint8_t *)data + i); 1200 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c), 1201 i < (len - 4) ? " " : ""); 1202 strcat(b, tmp); 1203 } 1204 strcat(b, ">"); 1205 *buf = b; 1206 1207 free(tmp); 1208 1209 return (0); 1210error: 1211 return (1); 1212} 1213 1214static int 1215fdt_data_bytes(const void *data, int len, char **buf) 1216{ 1217 char *b, *tmp; 1218 const char *d; 1219 int i, l; 1220 1221 /* 1222 * Calculate the length for the string and allocate memory. 1223 */ 1224 1225 /* Each byte translates to 2 output characters */ 1226 l = len * 2; 1227 if (len > 1) 1228 /* Each consecutive byte requires a " " separator. */ 1229 l += (len - 1) * 1; 1230 /* Each byte will have a "0x" prefix */ 1231 l += len * 2; 1232 /* Space for surrounding [] and terminator. */ 1233 l += 3; 1234 1235 b = (char *)malloc(l); 1236 tmp = (char *)malloc(l); 1237 if (b == NULL) 1238 goto error; 1239 1240 if (tmp == NULL) { 1241 free(b); 1242 goto error; 1243 } 1244 1245 b[0] = '\0'; 1246 strcat(b, "["); 1247 1248 for (i = 0, d = data; i < len; i++) { 1249 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : ""); 1250 strcat(b, tmp); 1251 } 1252 strcat(b, "]"); 1253 *buf = b; 1254 1255 free(tmp); 1256 1257 return (0); 1258error: 1259 return (1); 1260} 1261 1262static int 1263fdt_data_fmt(const void *data, int len, char **buf) 1264{ 1265 int count; 1266 1267 if (len == 0) { 1268 *buf = NULL; 1269 return (1); 1270 } 1271 1272 if (fdt_isprint(data, len, &count)) 1273 return (fdt_data_str(data, len, count, buf)); 1274 1275 else if ((len % 4) == 0) 1276 return (fdt_data_cell(data, len, buf)); 1277 1278 else 1279 return (fdt_data_bytes(data, len, buf)); 1280} 1281 1282static int 1283fdt_prop(int offset) 1284{ 1285 char *line, *buf; 1286 const struct fdt_property *prop; 1287 const char *name; 1288 const void *data; 1289 int len, rv; 1290 1291 line = NULL; 1292 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop)); 1293 if (prop == NULL) 1294 return (1); 1295 1296 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)); 1297 len = fdt32_to_cpu(prop->len); 1298 1299 rv = 0; 1300 buf = NULL; 1301 if (len == 0) { 1302 /* Property without value */ 1303 line = (char *)malloc(strlen(name) + 2); 1304 if (line == NULL) { 1305 rv = 2; 1306 goto out2; 1307 } 1308 sprintf(line, "%s\n", name); 1309 goto out1; 1310 } 1311 1312 /* 1313 * Process property with value 1314 */ 1315 data = prop->data; 1316 1317 if (fdt_data_fmt(data, len, &buf) != 0) { 1318 rv = 3; 1319 goto out2; 1320 } 1321 1322 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) + 1323 strlen(buf) + 2); 1324 if (line == NULL) { 1325 sprintf(command_errbuf, "could not allocate space for string"); 1326 rv = 4; 1327 goto out2; 1328 } 1329 1330 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf); 1331 1332out1: 1333 pager_open(); 1334 pager_output(line); 1335 pager_close(); 1336 1337out2: 1338 if (buf) 1339 free(buf); 1340 1341 if (line) 1342 free(line); 1343 1344 return (rv); 1345} 1346 1347static int 1348fdt_modprop(int nodeoff, char *propname, void *value, char mode) 1349{ 1350 uint32_t cells[100]; 1351 const char *buf; 1352 int len, rv; 1353 const struct fdt_property *p; 1354 1355 p = fdt_get_property(fdtp, nodeoff, propname, NULL); 1356 1357 if (p != NULL) { 1358 if (mode == 1) { 1359 /* Adding inexistant value in mode 1 is forbidden */ 1360 sprintf(command_errbuf, "property already exists!"); 1361 return (CMD_ERROR); 1362 } 1363 } else if (mode == 0) { 1364 sprintf(command_errbuf, "property does not exist!"); 1365 return (CMD_ERROR); 1366 } 1367 len = strlen(value); 1368 rv = 0; 1369 buf = value; 1370 1371 switch (*buf) { 1372 case '&': 1373 /* phandles */ 1374 break; 1375 case '<': 1376 /* Data cells */ 1377 len = fdt_strtovect(buf, (void *)&cells, 100, 1378 sizeof(uint32_t)); 1379 1380 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1381 len * sizeof(uint32_t)); 1382 break; 1383 case '[': 1384 /* Data bytes */ 1385 len = fdt_strtovect(buf, (void *)&cells, 100, 1386 sizeof(uint8_t)); 1387 1388 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1389 len * sizeof(uint8_t)); 1390 break; 1391 case '"': 1392 default: 1393 /* Default -- string */ 1394 rv = fdt_setprop_string(fdtp, nodeoff, propname, value); 1395 break; 1396 } 1397 1398 if (rv != 0) { 1399 if (rv == -FDT_ERR_NOSPACE) 1400 sprintf(command_errbuf, 1401 "Device tree blob is too small!\n"); 1402 else 1403 sprintf(command_errbuf, 1404 "Could not add/modify property!\n"); 1405 } 1406 return (rv); 1407} 1408 1409/* Merge strings from argv into a single string */ 1410static int 1411fdt_merge_strings(int argc, char *argv[], int start, char **buffer) 1412{ 1413 char *buf; 1414 int i, idx, sz; 1415 1416 *buffer = NULL; 1417 sz = 0; 1418 1419 for (i = start; i < argc; i++) 1420 sz += strlen(argv[i]); 1421 1422 /* Additional bytes for whitespaces between args */ 1423 sz += argc - start; 1424 1425 buf = (char *)malloc(sizeof(char) * sz); 1426 bzero(buf, sizeof(char) * sz); 1427 1428 if (buf == NULL) { 1429 sprintf(command_errbuf, "could not allocate space " 1430 "for string"); 1431 return (1); 1432 } 1433 1434 idx = 0; 1435 for (i = start, idx = 0; i < argc; i++) { 1436 strcpy(buf + idx, argv[i]); 1437 idx += strlen(argv[i]); 1438 buf[idx] = ' '; 1439 idx++; 1440 } 1441 buf[sz - 1] = '\0'; 1442 *buffer = buf; 1443 return (0); 1444} 1445 1446/* Extract offset and name of node/property from a given path */ 1447static int 1448fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff) 1449{ 1450 int o; 1451 char *path = *pathp, *name = NULL, *subpath = NULL; 1452 1453 subpath = strrchr(path, '/'); 1454 if (subpath == NULL) { 1455 o = fdt_path_offset(fdtp, cwd); 1456 name = path; 1457 path = (char *)&cwd; 1458 } else { 1459 *subpath = '\0'; 1460 if (strlen(path) == 0) 1461 path = cwd; 1462 1463 name = subpath + 1; 1464 o = fdt_path_offset(fdtp, path); 1465 } 1466 1467 if (strlen(name) == 0) { 1468 sprintf(command_errbuf, "name not specified"); 1469 return (1); 1470 } 1471 if (o < 0) { 1472 sprintf(command_errbuf, "could not find node: '%s'", path); 1473 return (1); 1474 } 1475 *namep = name; 1476 *nodeoff = o; 1477 *pathp = path; 1478 return (0); 1479} 1480 1481static int 1482fdt_cmd_prop(int argc, char *argv[]) 1483{ 1484 char *path, *propname, *value; 1485 int o, next, depth, rv; 1486 uint32_t tag; 1487 1488 path = (argc > 2) ? argv[2] : NULL; 1489 1490 value = NULL; 1491 1492 if (argc > 3) { 1493 /* Merge property value strings into one */ 1494 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1495 return (CMD_ERROR); 1496 } else 1497 value = NULL; 1498 1499 if (path == NULL) 1500 path = cwd; 1501 1502 rv = CMD_OK; 1503 1504 if (value) { 1505 /* If value is specified -- try to modify prop. */ 1506 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1507 return (CMD_ERROR); 1508 1509 rv = fdt_modprop(o, propname, value, 0); 1510 if (rv) 1511 return (CMD_ERROR); 1512 return (CMD_OK); 1513 1514 } 1515 /* User wants to display properties */ 1516 o = fdt_path_offset(fdtp, path); 1517 1518 if (o < 0) { 1519 sprintf(command_errbuf, "could not find node: '%s'", path); 1520 rv = CMD_ERROR; 1521 goto out; 1522 } 1523 1524 depth = 0; 1525 while (depth >= 0) { 1526 tag = fdt_next_tag(fdtp, o, &next); 1527 switch (tag) { 1528 case FDT_NOP: 1529 break; 1530 case FDT_PROP: 1531 if (depth > 1) 1532 /* Don't process properties of nested nodes */ 1533 break; 1534 1535 if (fdt_prop(o) != 0) { 1536 sprintf(command_errbuf, "could not process " 1537 "property"); 1538 rv = CMD_ERROR; 1539 goto out; 1540 } 1541 break; 1542 case FDT_BEGIN_NODE: 1543 depth++; 1544 if (depth > FDT_MAX_DEPTH) { 1545 printf("warning: nesting too deep: %d\n", 1546 depth); 1547 goto out; 1548 } 1549 break; 1550 case FDT_END_NODE: 1551 depth--; 1552 if (depth == 0) 1553 /* 1554 * This is the end of our starting node, force 1555 * the loop finish. 1556 */ 1557 depth--; 1558 break; 1559 } 1560 o = next; 1561 } 1562out: 1563 return (rv); 1564} 1565 1566static int 1567fdt_cmd_mkprop(int argc, char *argv[]) 1568{ 1569 int o; 1570 char *path, *propname, *value; 1571 1572 path = (argc > 2) ? argv[2] : NULL; 1573 1574 value = NULL; 1575 1576 if (argc > 3) { 1577 /* Merge property value strings into one */ 1578 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1579 return (CMD_ERROR); 1580 } else 1581 value = NULL; 1582 1583 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1584 return (CMD_ERROR); 1585 1586 if (fdt_modprop(o, propname, value, 1)) 1587 return (CMD_ERROR); 1588 1589 return (CMD_OK); 1590} 1591 1592static int 1593fdt_cmd_rm(int argc, char *argv[]) 1594{ 1595 int o, rv; 1596 char *path = NULL, *propname; 1597 1598 if (argc > 2) 1599 path = argv[2]; 1600 else { 1601 sprintf(command_errbuf, "no node/property name specified"); 1602 return (CMD_ERROR); 1603 } 1604 1605 o = fdt_path_offset(fdtp, path); 1606 if (o < 0) { 1607 /* If node not found -- try to find & delete property */ 1608 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1609 return (CMD_ERROR); 1610 1611 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) { 1612 sprintf(command_errbuf, "could not delete" 1613 "%s\n", (rv == -FDT_ERR_NOTFOUND) ? 1614 "(property/node does not exist)" : ""); 1615 return (CMD_ERROR); 1616 1617 } else 1618 return (CMD_OK); 1619 } 1620 /* If node exists -- remove node */ 1621 rv = fdt_del_node(fdtp, o); 1622 if (rv) { 1623 sprintf(command_errbuf, "could not delete node"); 1624 return (CMD_ERROR); 1625 } 1626 return (CMD_OK); 1627} 1628 1629static int 1630fdt_cmd_mknode(int argc, char *argv[]) 1631{ 1632 int o, rv; 1633 char *path = NULL, *nodename = NULL; 1634 1635 if (argc > 2) 1636 path = argv[2]; 1637 else { 1638 sprintf(command_errbuf, "no node name specified"); 1639 return (CMD_ERROR); 1640 } 1641 1642 if (fdt_extract_nameloc(&path, &nodename, &o) != 0) 1643 return (CMD_ERROR); 1644 1645 rv = fdt_add_subnode(fdtp, o, nodename); 1646 1647 if (rv < 0) { 1648 if (rv == -FDT_ERR_NOSPACE) 1649 sprintf(command_errbuf, 1650 "Device tree blob is too small!\n"); 1651 else 1652 sprintf(command_errbuf, 1653 "Could not add node!\n"); 1654 return (CMD_ERROR); 1655 } 1656 return (CMD_OK); 1657} 1658 1659static int 1660fdt_cmd_pwd(int argc, char *argv[]) 1661{ 1662 char line[FDT_CWD_LEN]; 1663 1664 pager_open(); 1665 sprintf(line, "%s\n", cwd); 1666 pager_output(line); 1667 pager_close(); 1668 return (CMD_OK); 1669} 1670 1671static int 1672fdt_cmd_mres(int argc, char *argv[]) 1673{ 1674 uint64_t start, size; 1675 int i, total; 1676 char line[80]; 1677 1678 pager_open(); 1679 total = fdt_num_mem_rsv(fdtp); 1680 if (total > 0) { 1681 pager_output("Reserved memory regions:\n"); 1682 for (i = 0; i < total; i++) { 1683 fdt_get_mem_rsv(fdtp, i, &start, &size); 1684 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n", 1685 i, start, size); 1686 pager_output(line); 1687 } 1688 } else 1689 pager_output("No reserved memory regions\n"); 1690 pager_close(); 1691 1692 return (CMD_OK); 1693} 1694 1695static int 1696fdt_cmd_nyi(int argc, char *argv[]) 1697{ 1698 1699 printf("command not yet implemented\n"); 1700 return (CMD_ERROR); 1701} 1702