fdt_loader_cmd.c revision 273680
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 273680 2014-10-26 04:13:08Z ian $"); 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 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(char *str, void *cellbuf, int lim, unsigned char cellsize, 368 uint8_t base) 369{ 370 char *buf = str; 371 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 char *end, *str; 415 uint8_t tmp_addr[6]; 416 int i, n; 417 418 /* Extract interface number */ 419 i = strtol(env + 3, &end, 10); 420 if (end == (env + 3)) 421 /* 'ethaddr' means interface 0 address */ 422 n = 0; 423 else 424 n = i; 425 426 if (n > TMP_MAX_ETH) 427 return; 428 429 str = ub_env_get(env); 430 431 /* Convert macaddr string into a vector of uints */ 432 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t)); 433 if (n != 0) { 434 i = strlen(env) - 7; 435 strncpy(ethstr + 8, env + 3, i); 436 } 437 /* Set actual property to a value from vect */ 438 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr), 439 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t)); 440 441 /* Clear ethernet..XXXX.. string */ 442 bzero(ethstr + 8, len - 8); 443 444 if (n + 1 > *eth_no) 445 *eth_no = n + 1; 446} 447 448static void 449fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq) 450{ 451 int lo, o = 0, o2, maxo = 0, depth; 452 const uint32_t zero = 0; 453 454 /* We want to modify every subnode of /cpus */ 455 o = fdt_path_offset(fdtp, "/cpus"); 456 if (o < 0) 457 return; 458 459 /* maxo should contain offset of node next to /cpus */ 460 depth = 0; 461 maxo = o; 462 while (depth != -1) 463 maxo = fdt_next_node(fdtp, maxo, &depth); 464 465 /* Find CPU frequency properties */ 466 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency", 467 &zero, sizeof(uint32_t)); 468 469 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero, 470 sizeof(uint32_t)); 471 472 lo = MIN(o, o2); 473 474 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) { 475 476 o = fdt_node_offset_by_prop_value(fdtp, lo, 477 "clock-frequency", &zero, sizeof(uint32_t)); 478 479 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency", 480 &zero, sizeof(uint32_t)); 481 482 /* We're only interested in /cpus subnode(s) */ 483 if (lo > maxo) 484 break; 485 486 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency", 487 (uint32_t)cpufreq); 488 489 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency", 490 (uint32_t)busfreq); 491 492 lo = MIN(o, o2); 493 } 494} 495 496static int 497fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells) 498{ 499 int cells_in_tuple, i, tuples, tuple_size; 500 uint32_t cur_start, cur_size; 501 502 cells_in_tuple = (addr_cells + size_cells); 503 tuple_size = cells_in_tuple * sizeof(uint32_t); 504 tuples = len / tuple_size; 505 if (tuples == 0) 506 return (EINVAL); 507 508 for (i = 0; i < tuples; i++) { 509 if (addr_cells == 2) 510 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]); 511 else 512 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]); 513 514 if (size_cells == 2) 515 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]); 516 else 517 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]); 518 519 if (cur_size == 0) 520 return (EINVAL); 521 522 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n", 523 i, cur_start, cur_size); 524 } 525 return (0); 526} 527 528static void 529fixup_memory(struct sys_info *si) 530{ 531 struct mem_region *curmr; 532 uint32_t addr_cells, size_cells; 533 uint32_t *addr_cellsp, *reg, *size_cellsp; 534 int err, i, len, memory, realmrno, root; 535 uint8_t *buf, *sb; 536 uint64_t rstart, rsize; 537 int reserved; 538 539 root = fdt_path_offset(fdtp, "/"); 540 if (root < 0) { 541 sprintf(command_errbuf, "Could not find root node !"); 542 return; 543 } 544 545 memory = fdt_path_offset(fdtp, "/memory"); 546 if (memory <= 0) { 547 /* Create proper '/memory' node. */ 548 memory = fdt_add_subnode(fdtp, root, "memory"); 549 if (memory <= 0) { 550 sprintf(command_errbuf, "Could not fixup '/memory' " 551 "node, error code : %d!\n", memory); 552 return; 553 } 554 555 err = fdt_setprop(fdtp, memory, "device_type", "memory", 556 sizeof("memory")); 557 558 if (err < 0) 559 return; 560 } 561 562 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells", 563 NULL); 564 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL); 565 566 if (addr_cellsp == NULL || size_cellsp == NULL) { 567 sprintf(command_errbuf, "Could not fixup '/memory' node : " 568 "%s %s property not found in root node!\n", 569 (!addr_cellsp) ? "#address-cells" : "", 570 (!size_cellsp) ? "#size-cells" : ""); 571 return; 572 } 573 574 addr_cells = fdt32_to_cpu(*addr_cellsp); 575 size_cells = fdt32_to_cpu(*size_cellsp); 576 577 /* 578 * Convert memreserve data to memreserve property 579 * Check if property already exists 580 */ 581 reserved = fdt_num_mem_rsv(fdtp); 582 if (reserved && 583 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) { 584 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t); 585 sb = buf = (uint8_t *)malloc(len); 586 if (!buf) 587 return; 588 589 bzero(buf, len); 590 591 for (i = 0; i < reserved; i++) { 592 curmr = &si->mr[i]; 593 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize)) 594 break; 595 if (rsize) { 596 /* Ensure endianess, and put cells into a buffer */ 597 if (addr_cells == 2) 598 *(uint64_t *)buf = 599 cpu_to_fdt64(rstart); 600 else 601 *(uint32_t *)buf = 602 cpu_to_fdt32(rstart); 603 604 buf += sizeof(uint32_t) * addr_cells; 605 if (size_cells == 2) 606 *(uint64_t *)buf = 607 cpu_to_fdt64(rsize); 608 else 609 *(uint32_t *)buf = 610 cpu_to_fdt32(rsize); 611 612 buf += sizeof(uint32_t) * size_cells; 613 } 614 } 615 616 /* Set property */ 617 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0) 618 printf("Could not fixup 'memreserve' property.\n"); 619 620 free(sb); 621 } 622 623 /* Count valid memory regions entries in sysinfo. */ 624 realmrno = si->mr_no; 625 for (i = 0; i < si->mr_no; i++) 626 if (si->mr[i].start == 0 && si->mr[i].size == 0) 627 realmrno--; 628 629 if (realmrno == 0) { 630 sprintf(command_errbuf, "Could not fixup '/memory' node : " 631 "sysinfo doesn't contain valid memory regions info!\n"); 632 return; 633 } 634 635 if ((reg = (uint32_t *)fdt_getprop(fdtp, memory, "reg", 636 &len)) != NULL) { 637 638 if (fdt_reg_valid(reg, len, addr_cells, size_cells) == 0) 639 /* 640 * Do not apply fixup if existing 'reg' property 641 * seems to be valid. 642 */ 643 return; 644 } 645 646 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t); 647 sb = buf = (uint8_t *)malloc(len); 648 if (!buf) 649 return; 650 651 bzero(buf, len); 652 653 for (i = 0; i < si->mr_no; i++) { 654 curmr = &si->mr[i]; 655 if (curmr->size != 0) { 656 /* Ensure endianess, and put cells into a buffer */ 657 if (addr_cells == 2) 658 *(uint64_t *)buf = 659 cpu_to_fdt64(curmr->start); 660 else 661 *(uint32_t *)buf = 662 cpu_to_fdt32(curmr->start); 663 664 buf += sizeof(uint32_t) * addr_cells; 665 if (size_cells == 2) 666 *(uint64_t *)buf = 667 cpu_to_fdt64(curmr->size); 668 else 669 *(uint32_t *)buf = 670 cpu_to_fdt32(curmr->size); 671 672 buf += sizeof(uint32_t) * size_cells; 673 } 674 } 675 676 /* Set property */ 677 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0) 678 sprintf(command_errbuf, "Could not fixup '/memory' node.\n"); 679 680 free(sb); 681} 682 683static void 684fixup_stdout(const char *env) 685{ 686 const char *str; 687 char *ptr; 688 int serialno; 689 int len, no, sero; 690 const struct fdt_property *prop; 691 char *tmp[10]; 692 693 str = ub_env_get(env); 694 ptr = (char *)str + strlen(str) - 1; 695 while (ptr > str && isdigit(*(str - 1))) 696 str--; 697 698 if (ptr == str) 699 return; 700 701 serialno = (int)strtol(ptr, NULL, 0); 702 no = fdt_path_offset(fdtp, "/chosen"); 703 if (no < 0) 704 return; 705 706 prop = fdt_get_property(fdtp, no, "stdout", &len); 707 708 /* If /chosen/stdout does not extist, create it */ 709 if (prop == NULL || (prop != NULL && len == 0)) { 710 711 bzero(tmp, 10 * sizeof(char)); 712 strcpy((char *)&tmp, "serial"); 713 if (strlen(ptr) > 3) 714 /* Serial number too long */ 715 return; 716 717 strncpy((char *)tmp + 6, ptr, 3); 718 sero = fdt_path_offset(fdtp, (const char *)tmp); 719 if (sero < 0) 720 /* 721 * If serial device we're trying to assign 722 * stdout to doesn't exist in DT -- return. 723 */ 724 return; 725 726 fdt_setprop(fdtp, no, "stdout", &tmp, 727 strlen((char *)&tmp) + 1); 728 fdt_setprop(fdtp, no, "stdin", &tmp, 729 strlen((char *)&tmp) + 1); 730 } 731} 732 733/* 734 * Locate the blob, fix it up and return its location. 735 */ 736static int 737fdt_fixup(void) 738{ 739 const char *env; 740 char *ethstr; 741 int chosen, eth_no, len; 742 struct sys_info *si; 743 744 env = NULL; 745 eth_no = 0; 746 ethstr = NULL; 747 len = 0; 748 749 debugf("fdt_fixup()\n"); 750 751 if (fdtp == NULL && fdt_setup_fdtp() != 0) 752 return (0); 753 754 /* Create /chosen node (if not exists) */ 755 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) == 756 -FDT_ERR_NOTFOUND) 757 chosen = fdt_add_subnode(fdtp, 0, "chosen"); 758 759 /* Value assigned to fixup-applied does not matter. */ 760 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL)) 761 return (1); 762 763 /* Acquire sys_info */ 764 si = ub_get_sys_info(); 765 766 while ((env = ub_env_enum(env)) != NULL) { 767 if (strncmp(env, "eth", 3) == 0 && 768 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) { 769 /* 770 * Handle Ethernet addrs: parse uboot env eth%daddr 771 */ 772 773 if (!eth_no) { 774 /* 775 * Check how many chars we will need to store 776 * maximal eth iface number. 777 */ 778 len = strlen(STRINGIFY(TMP_MAX_ETH)) + 779 strlen("ethernet"); 780 781 /* 782 * Reserve mem for string "ethernet" and len 783 * chars for iface no. 784 */ 785 ethstr = (char *)malloc(len * sizeof(char)); 786 bzero(ethstr, len * sizeof(char)); 787 strcpy(ethstr, "ethernet0"); 788 } 789 790 /* Modify blob */ 791 fixup_ethernet(env, ethstr, ð_no, len); 792 793 } else if (strcmp(env, "consoledev") == 0) 794 fixup_stdout(env); 795 } 796 797 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */ 798 fixup_cpubusfreqs(si->clk_cpu, si->clk_bus); 799 800 /* Fixup memory regions */ 801 fixup_memory(si); 802 803 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0); 804 return (1); 805} 806 807/* 808 * Copy DTB blob to specified location and return size 809 */ 810int 811fdt_copy(vm_offset_t va) 812{ 813 int err; 814 debugf("fdt_copy va 0x%08x\n", va); 815 if (fdtp == NULL) { 816 err = fdt_setup_fdtp(); 817 if (err) { 818 printf("No valid device tree blob found!\n"); 819 return (0); 820 } 821 } 822 823 if (fdt_fixup() == 0) 824 return (0); 825 826 if (fdtp_va != 0) { 827 /* Overwrite the FDT with the fixed version. */ 828 /* XXX Is this really appropriate? */ 829 COPYIN(fdtp, fdtp_va, fdtp_size); 830 } 831 COPYIN(fdtp, va, fdtp_size); 832 return (fdtp_size); 833} 834 835 836 837int 838command_fdt_internal(int argc, char *argv[]) 839{ 840 cmdf_t *cmdh; 841 int flags; 842 char *cmd; 843 int i, err; 844 845 if (argc < 2) { 846 command_errmsg = "usage is 'fdt <command> [<args>]"; 847 return (CMD_ERROR); 848 } 849 850 /* 851 * Validate fdt <command>. 852 */ 853 cmd = strdup(argv[1]); 854 i = 0; 855 cmdh = NULL; 856 while (!(commands[i].name == NULL)) { 857 if (strcmp(cmd, commands[i].name) == 0) { 858 /* found it */ 859 cmdh = commands[i].handler; 860 flags = commands[i].flags; 861 break; 862 } 863 i++; 864 } 865 if (cmdh == NULL) { 866 command_errmsg = "unknown command"; 867 return (CMD_ERROR); 868 } 869 870 if (flags & CMD_REQUIRES_BLOB) { 871 /* 872 * Check if uboot env vars were parsed already. If not, do it now. 873 */ 874 if (fdt_fixup() == 0) 875 return (CMD_ERROR); 876 } 877 878 /* 879 * Call command handler. 880 */ 881 err = (*cmdh)(argc, argv); 882 883 return (err); 884} 885 886static int 887fdt_cmd_addr(int argc, char *argv[]) 888{ 889 struct preloaded_file *fp; 890 struct fdt_header *hdr; 891 const char *addr; 892 char *cp; 893 894 fdt_to_load = NULL; 895 896 if (argc > 2) 897 addr = argv[2]; 898 else { 899 sprintf(command_errbuf, "no address specified"); 900 return (CMD_ERROR); 901 } 902 903 hdr = (struct fdt_header *)strtoul(addr, &cp, 16); 904 if (cp == addr) { 905 sprintf(command_errbuf, "Invalid address: %s", addr); 906 return (CMD_ERROR); 907 } 908 909 while ((fp = file_findfile(NULL, "dtb")) != NULL) { 910 file_discard(fp); 911 } 912 913 fdt_to_load = hdr; 914 return (CMD_OK); 915} 916 917static int 918fdt_cmd_cd(int argc, char *argv[]) 919{ 920 char *path; 921 char tmp[FDT_CWD_LEN]; 922 int len, o; 923 924 path = (argc > 2) ? argv[2] : "/"; 925 926 if (path[0] == '/') { 927 len = strlen(path); 928 if (len >= FDT_CWD_LEN) 929 goto fail; 930 } else { 931 /* Handle path specification relative to cwd */ 932 len = strlen(cwd) + strlen(path) + 1; 933 if (len >= FDT_CWD_LEN) 934 goto fail; 935 936 strcpy(tmp, cwd); 937 strcat(tmp, "/"); 938 strcat(tmp, path); 939 path = tmp; 940 } 941 942 o = fdt_path_offset(fdtp, path); 943 if (o < 0) { 944 sprintf(command_errbuf, "could not find node: '%s'", path); 945 return (CMD_ERROR); 946 } 947 948 strcpy(cwd, path); 949 return (CMD_OK); 950 951fail: 952 sprintf(command_errbuf, "path too long: %d, max allowed: %d", 953 len, FDT_CWD_LEN - 1); 954 return (CMD_ERROR); 955} 956 957static int 958fdt_cmd_hdr(int argc __unused, char *argv[] __unused) 959{ 960 char line[80]; 961 int ver; 962 963 if (fdtp == NULL) { 964 command_errmsg = "no device tree blob pointer?!"; 965 return (CMD_ERROR); 966 } 967 968 ver = fdt_version(fdtp); 969 pager_open(); 970 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp); 971 pager_output(line); 972 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp)); 973 pager_output(line); 974 sprintf(line, " size = %d\n", fdt_totalsize(fdtp)); 975 pager_output(line); 976 sprintf(line, " off_dt_struct = 0x%08x\n", 977 fdt_off_dt_struct(fdtp)); 978 pager_output(line); 979 sprintf(line, " off_dt_strings = 0x%08x\n", 980 fdt_off_dt_strings(fdtp)); 981 pager_output(line); 982 sprintf(line, " off_mem_rsvmap = 0x%08x\n", 983 fdt_off_mem_rsvmap(fdtp)); 984 pager_output(line); 985 sprintf(line, " version = %d\n", ver); 986 pager_output(line); 987 sprintf(line, " last compatible version = %d\n", 988 fdt_last_comp_version(fdtp)); 989 pager_output(line); 990 if (ver >= 2) { 991 sprintf(line, " boot_cpuid = %d\n", 992 fdt_boot_cpuid_phys(fdtp)); 993 pager_output(line); 994 } 995 if (ver >= 3) { 996 sprintf(line, " size_dt_strings = %d\n", 997 fdt_size_dt_strings(fdtp)); 998 pager_output(line); 999 } 1000 if (ver >= 17) { 1001 sprintf(line, " size_dt_struct = %d\n", 1002 fdt_size_dt_struct(fdtp)); 1003 pager_output(line); 1004 } 1005 pager_close(); 1006 1007 return (CMD_OK); 1008} 1009 1010static int 1011fdt_cmd_ls(int argc, char *argv[]) 1012{ 1013 const char *prevname[FDT_MAX_DEPTH] = { NULL }; 1014 const char *name; 1015 char *path; 1016 int i, o, depth, len; 1017 1018 path = (argc > 2) ? argv[2] : NULL; 1019 if (path == NULL) 1020 path = cwd; 1021 1022 o = fdt_path_offset(fdtp, path); 1023 if (o < 0) { 1024 sprintf(command_errbuf, "could not find node: '%s'", path); 1025 return (CMD_ERROR); 1026 } 1027 1028 for (depth = 0; 1029 (o >= 0) && (depth >= 0); 1030 o = fdt_next_node(fdtp, o, &depth)) { 1031 1032 name = fdt_get_name(fdtp, o, &len); 1033 1034 if (depth > FDT_MAX_DEPTH) { 1035 printf("max depth exceeded: %d\n", depth); 1036 continue; 1037 } 1038 1039 prevname[depth] = name; 1040 1041 /* Skip root (i = 1) when printing devices */ 1042 for (i = 1; i <= depth; i++) { 1043 if (prevname[i] == NULL) 1044 break; 1045 1046 if (strcmp(cwd, "/") == 0) 1047 printf("/"); 1048 printf("%s", prevname[i]); 1049 } 1050 printf("\n"); 1051 } 1052 1053 return (CMD_OK); 1054} 1055 1056static __inline int 1057isprint(int c) 1058{ 1059 1060 return (c >= ' ' && c <= 0x7e); 1061} 1062 1063static int 1064fdt_isprint(const void *data, int len, int *count) 1065{ 1066 const char *d; 1067 char ch; 1068 int yesno, i; 1069 1070 if (len == 0) 1071 return (0); 1072 1073 d = (const char *)data; 1074 if (d[len - 1] != '\0') 1075 return (0); 1076 1077 *count = 0; 1078 yesno = 1; 1079 for (i = 0; i < len; i++) { 1080 ch = *(d + i); 1081 if (isprint(ch) || (ch == '\0' && i > 0)) { 1082 /* Count strings */ 1083 if (ch == '\0') 1084 (*count)++; 1085 continue; 1086 } 1087 1088 yesno = 0; 1089 break; 1090 } 1091 1092 return (yesno); 1093} 1094 1095static int 1096fdt_data_str(const void *data, int len, int count, char **buf) 1097{ 1098 char *b, *tmp; 1099 const char *d; 1100 int buf_len, i, l; 1101 1102 /* 1103 * Calculate the length for the string and allocate memory. 1104 * 1105 * Note that 'len' already includes at least one terminator. 1106 */ 1107 buf_len = len; 1108 if (count > 1) { 1109 /* 1110 * Each token had already a terminator buried in 'len', but we 1111 * only need one eventually, don't count space for these. 1112 */ 1113 buf_len -= count - 1; 1114 1115 /* Each consecutive token requires a ", " separator. */ 1116 buf_len += count * 2; 1117 } 1118 1119 /* Add some space for surrounding double quotes. */ 1120 buf_len += count * 2; 1121 1122 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */ 1123 b = (char *)malloc(buf_len); 1124 tmp = (char *)malloc(buf_len); 1125 if (b == NULL) 1126 goto error; 1127 1128 if (tmp == NULL) { 1129 free(b); 1130 goto error; 1131 } 1132 1133 b[0] = '\0'; 1134 1135 /* 1136 * Now that we have space, format the string. 1137 */ 1138 i = 0; 1139 do { 1140 d = (const char *)data + i; 1141 l = strlen(d) + 1; 1142 1143 sprintf(tmp, "\"%s\"%s", d, 1144 (i + l) < len ? ", " : ""); 1145 strcat(b, tmp); 1146 1147 i += l; 1148 1149 } while (i < len); 1150 *buf = b; 1151 1152 free(tmp); 1153 1154 return (0); 1155error: 1156 return (1); 1157} 1158 1159static int 1160fdt_data_cell(const void *data, int len, char **buf) 1161{ 1162 char *b, *tmp; 1163 const uint32_t *c; 1164 int count, i, l; 1165 1166 /* Number of cells */ 1167 count = len / 4; 1168 1169 /* 1170 * Calculate the length for the string and allocate memory. 1171 */ 1172 1173 /* Each byte translates to 2 output characters */ 1174 l = len * 2; 1175 if (count > 1) { 1176 /* Each consecutive cell requires a " " separator. */ 1177 l += (count - 1) * 1; 1178 } 1179 /* Each cell will have a "0x" prefix */ 1180 l += count * 2; 1181 /* Space for surrounding <> and terminator */ 1182 l += 3; 1183 1184 b = (char *)malloc(l); 1185 tmp = (char *)malloc(l); 1186 if (b == NULL) 1187 goto error; 1188 1189 if (tmp == NULL) { 1190 free(b); 1191 goto error; 1192 } 1193 1194 b[0] = '\0'; 1195 strcat(b, "<"); 1196 1197 for (i = 0; i < len; i += 4) { 1198 c = (const uint32_t *)((const uint8_t *)data + i); 1199 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c), 1200 i < (len - 4) ? " " : ""); 1201 strcat(b, tmp); 1202 } 1203 strcat(b, ">"); 1204 *buf = b; 1205 1206 free(tmp); 1207 1208 return (0); 1209error: 1210 return (1); 1211} 1212 1213static int 1214fdt_data_bytes(const void *data, int len, char **buf) 1215{ 1216 char *b, *tmp; 1217 const char *d; 1218 int i, l; 1219 1220 /* 1221 * Calculate the length for the string and allocate memory. 1222 */ 1223 1224 /* Each byte translates to 2 output characters */ 1225 l = len * 2; 1226 if (len > 1) 1227 /* Each consecutive byte requires a " " separator. */ 1228 l += (len - 1) * 1; 1229 /* Each byte will have a "0x" prefix */ 1230 l += len * 2; 1231 /* Space for surrounding [] and terminator. */ 1232 l += 3; 1233 1234 b = (char *)malloc(l); 1235 tmp = (char *)malloc(l); 1236 if (b == NULL) 1237 goto error; 1238 1239 if (tmp == NULL) { 1240 free(b); 1241 goto error; 1242 } 1243 1244 b[0] = '\0'; 1245 strcat(b, "["); 1246 1247 for (i = 0, d = data; i < len; i++) { 1248 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : ""); 1249 strcat(b, tmp); 1250 } 1251 strcat(b, "]"); 1252 *buf = b; 1253 1254 free(tmp); 1255 1256 return (0); 1257error: 1258 return (1); 1259} 1260 1261static int 1262fdt_data_fmt(const void *data, int len, char **buf) 1263{ 1264 int count; 1265 1266 if (len == 0) { 1267 *buf = NULL; 1268 return (1); 1269 } 1270 1271 if (fdt_isprint(data, len, &count)) 1272 return (fdt_data_str(data, len, count, buf)); 1273 1274 else if ((len % 4) == 0) 1275 return (fdt_data_cell(data, len, buf)); 1276 1277 else 1278 return (fdt_data_bytes(data, len, buf)); 1279} 1280 1281static int 1282fdt_prop(int offset) 1283{ 1284 char *line, *buf; 1285 const struct fdt_property *prop; 1286 const char *name; 1287 const void *data; 1288 int len, rv; 1289 1290 line = NULL; 1291 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop)); 1292 if (prop == NULL) 1293 return (1); 1294 1295 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)); 1296 len = fdt32_to_cpu(prop->len); 1297 1298 rv = 0; 1299 buf = NULL; 1300 if (len == 0) { 1301 /* Property without value */ 1302 line = (char *)malloc(strlen(name) + 2); 1303 if (line == NULL) { 1304 rv = 2; 1305 goto out2; 1306 } 1307 sprintf(line, "%s\n", name); 1308 goto out1; 1309 } 1310 1311 /* 1312 * Process property with value 1313 */ 1314 data = prop->data; 1315 1316 if (fdt_data_fmt(data, len, &buf) != 0) { 1317 rv = 3; 1318 goto out2; 1319 } 1320 1321 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) + 1322 strlen(buf) + 2); 1323 if (line == NULL) { 1324 sprintf(command_errbuf, "could not allocate space for string"); 1325 rv = 4; 1326 goto out2; 1327 } 1328 1329 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf); 1330 1331out1: 1332 pager_open(); 1333 pager_output(line); 1334 pager_close(); 1335 1336out2: 1337 if (buf) 1338 free(buf); 1339 1340 if (line) 1341 free(line); 1342 1343 return (rv); 1344} 1345 1346static int 1347fdt_modprop(int nodeoff, char *propname, void *value, char mode) 1348{ 1349 uint32_t cells[100]; 1350 char *buf; 1351 int len, rv; 1352 const struct fdt_property *p; 1353 1354 p = fdt_get_property(fdtp, nodeoff, propname, NULL); 1355 1356 if (p != NULL) { 1357 if (mode == 1) { 1358 /* Adding inexistant value in mode 1 is forbidden */ 1359 sprintf(command_errbuf, "property already exists!"); 1360 return (CMD_ERROR); 1361 } 1362 } else if (mode == 0) { 1363 sprintf(command_errbuf, "property does not exist!"); 1364 return (CMD_ERROR); 1365 } 1366 len = strlen(value); 1367 rv = 0; 1368 buf = (char *)value; 1369 1370 switch (*buf) { 1371 case '&': 1372 /* phandles */ 1373 break; 1374 case '<': 1375 /* Data cells */ 1376 len = fdt_strtovect(buf, (void *)&cells, 100, 1377 sizeof(uint32_t)); 1378 1379 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1380 len * sizeof(uint32_t)); 1381 break; 1382 case '[': 1383 /* Data bytes */ 1384 len = fdt_strtovect(buf, (void *)&cells, 100, 1385 sizeof(uint8_t)); 1386 1387 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1388 len * sizeof(uint8_t)); 1389 break; 1390 case '"': 1391 default: 1392 /* Default -- string */ 1393 rv = fdt_setprop_string(fdtp, nodeoff, propname, value); 1394 break; 1395 } 1396 1397 if (rv != 0) { 1398 if (rv == -FDT_ERR_NOSPACE) 1399 sprintf(command_errbuf, 1400 "Device tree blob is too small!\n"); 1401 else 1402 sprintf(command_errbuf, 1403 "Could not add/modify property!\n"); 1404 } 1405 return (rv); 1406} 1407 1408/* Merge strings from argv into a single string */ 1409static int 1410fdt_merge_strings(int argc, char *argv[], int start, char **buffer) 1411{ 1412 char *buf; 1413 int i, idx, sz; 1414 1415 *buffer = NULL; 1416 sz = 0; 1417 1418 for (i = start; i < argc; i++) 1419 sz += strlen(argv[i]); 1420 1421 /* Additional bytes for whitespaces between args */ 1422 sz += argc - start; 1423 1424 buf = (char *)malloc(sizeof(char) * sz); 1425 bzero(buf, sizeof(char) * sz); 1426 1427 if (buf == NULL) { 1428 sprintf(command_errbuf, "could not allocate space " 1429 "for string"); 1430 return (1); 1431 } 1432 1433 idx = 0; 1434 for (i = start, idx = 0; i < argc; i++) { 1435 strcpy(buf + idx, argv[i]); 1436 idx += strlen(argv[i]); 1437 buf[idx] = ' '; 1438 idx++; 1439 } 1440 buf[sz - 1] = '\0'; 1441 *buffer = buf; 1442 return (0); 1443} 1444 1445/* Extract offset and name of node/property from a given path */ 1446static int 1447fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff) 1448{ 1449 int o; 1450 char *path = *pathp, *name = NULL, *subpath = NULL; 1451 1452 subpath = strrchr(path, '/'); 1453 if (subpath == NULL) { 1454 o = fdt_path_offset(fdtp, cwd); 1455 name = path; 1456 path = (char *)&cwd; 1457 } else { 1458 *subpath = '\0'; 1459 if (strlen(path) == 0) 1460 path = cwd; 1461 1462 name = subpath + 1; 1463 o = fdt_path_offset(fdtp, path); 1464 } 1465 1466 if (strlen(name) == 0) { 1467 sprintf(command_errbuf, "name not specified"); 1468 return (1); 1469 } 1470 if (o < 0) { 1471 sprintf(command_errbuf, "could not find node: '%s'", path); 1472 return (1); 1473 } 1474 *namep = name; 1475 *nodeoff = o; 1476 *pathp = path; 1477 return (0); 1478} 1479 1480static int 1481fdt_cmd_prop(int argc, char *argv[]) 1482{ 1483 char *path, *propname, *value; 1484 int o, next, depth, rv; 1485 uint32_t tag; 1486 1487 path = (argc > 2) ? argv[2] : NULL; 1488 1489 value = NULL; 1490 1491 if (argc > 3) { 1492 /* Merge property value strings into one */ 1493 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1494 return (CMD_ERROR); 1495 } else 1496 value = NULL; 1497 1498 if (path == NULL) 1499 path = cwd; 1500 1501 rv = CMD_OK; 1502 1503 if (value) { 1504 /* If value is specified -- try to modify prop. */ 1505 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1506 return (CMD_ERROR); 1507 1508 rv = fdt_modprop(o, propname, value, 0); 1509 if (rv) 1510 return (CMD_ERROR); 1511 return (CMD_OK); 1512 1513 } 1514 /* User wants to display properties */ 1515 o = fdt_path_offset(fdtp, path); 1516 1517 if (o < 0) { 1518 sprintf(command_errbuf, "could not find node: '%s'", path); 1519 rv = CMD_ERROR; 1520 goto out; 1521 } 1522 1523 depth = 0; 1524 while (depth >= 0) { 1525 tag = fdt_next_tag(fdtp, o, &next); 1526 switch (tag) { 1527 case FDT_NOP: 1528 break; 1529 case FDT_PROP: 1530 if (depth > 1) 1531 /* Don't process properties of nested nodes */ 1532 break; 1533 1534 if (fdt_prop(o) != 0) { 1535 sprintf(command_errbuf, "could not process " 1536 "property"); 1537 rv = CMD_ERROR; 1538 goto out; 1539 } 1540 break; 1541 case FDT_BEGIN_NODE: 1542 depth++; 1543 if (depth > FDT_MAX_DEPTH) { 1544 printf("warning: nesting too deep: %d\n", 1545 depth); 1546 goto out; 1547 } 1548 break; 1549 case FDT_END_NODE: 1550 depth--; 1551 if (depth == 0) 1552 /* 1553 * This is the end of our starting node, force 1554 * the loop finish. 1555 */ 1556 depth--; 1557 break; 1558 } 1559 o = next; 1560 } 1561out: 1562 return (rv); 1563} 1564 1565static int 1566fdt_cmd_mkprop(int argc, char *argv[]) 1567{ 1568 int o; 1569 char *path, *propname, *value; 1570 1571 path = (argc > 2) ? argv[2] : NULL; 1572 1573 value = NULL; 1574 1575 if (argc > 3) { 1576 /* Merge property value strings into one */ 1577 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1578 return (CMD_ERROR); 1579 } else 1580 value = NULL; 1581 1582 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1583 return (CMD_ERROR); 1584 1585 if (fdt_modprop(o, propname, value, 1)) 1586 return (CMD_ERROR); 1587 1588 return (CMD_OK); 1589} 1590 1591static int 1592fdt_cmd_rm(int argc, char *argv[]) 1593{ 1594 int o, rv; 1595 char *path = NULL, *propname; 1596 1597 if (argc > 2) 1598 path = argv[2]; 1599 else { 1600 sprintf(command_errbuf, "no node/property name specified"); 1601 return (CMD_ERROR); 1602 } 1603 1604 o = fdt_path_offset(fdtp, path); 1605 if (o < 0) { 1606 /* If node not found -- try to find & delete property */ 1607 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1608 return (CMD_ERROR); 1609 1610 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) { 1611 sprintf(command_errbuf, "could not delete" 1612 "%s\n", (rv == -FDT_ERR_NOTFOUND) ? 1613 "(property/node does not exist)" : ""); 1614 return (CMD_ERROR); 1615 1616 } else 1617 return (CMD_OK); 1618 } 1619 /* If node exists -- remove node */ 1620 rv = fdt_del_node(fdtp, o); 1621 if (rv) { 1622 sprintf(command_errbuf, "could not delete node"); 1623 return (CMD_ERROR); 1624 } 1625 return (CMD_OK); 1626} 1627 1628static int 1629fdt_cmd_mknode(int argc, char *argv[]) 1630{ 1631 int o, rv; 1632 char *path = NULL, *nodename = NULL; 1633 1634 if (argc > 2) 1635 path = argv[2]; 1636 else { 1637 sprintf(command_errbuf, "no node name specified"); 1638 return (CMD_ERROR); 1639 } 1640 1641 if (fdt_extract_nameloc(&path, &nodename, &o) != 0) 1642 return (CMD_ERROR); 1643 1644 rv = fdt_add_subnode(fdtp, o, nodename); 1645 1646 if (rv < 0) { 1647 if (rv == -FDT_ERR_NOSPACE) 1648 sprintf(command_errbuf, 1649 "Device tree blob is too small!\n"); 1650 else 1651 sprintf(command_errbuf, 1652 "Could not add node!\n"); 1653 return (CMD_ERROR); 1654 } 1655 return (CMD_OK); 1656} 1657 1658static int 1659fdt_cmd_pwd(int argc, char *argv[]) 1660{ 1661 char line[FDT_CWD_LEN]; 1662 1663 pager_open(); 1664 sprintf(line, "%s\n", cwd); 1665 pager_output(line); 1666 pager_close(); 1667 return (CMD_OK); 1668} 1669 1670static int 1671fdt_cmd_mres(int argc, char *argv[]) 1672{ 1673 uint64_t start, size; 1674 int i, total; 1675 char line[80]; 1676 1677 pager_open(); 1678 total = fdt_num_mem_rsv(fdtp); 1679 if (total > 0) { 1680 pager_output("Reserved memory regions:\n"); 1681 for (i = 0; i < total; i++) { 1682 fdt_get_mem_rsv(fdtp, i, &start, &size); 1683 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n", 1684 i, start, size); 1685 pager_output(line); 1686 } 1687 } else 1688 pager_output("No reserved memory regions\n"); 1689 pager_close(); 1690 1691 return (CMD_OK); 1692} 1693 1694static int 1695fdt_cmd_nyi(int argc, char *argv[]) 1696{ 1697 1698 printf("command not yet implemented\n"); 1699 return (CMD_ERROR); 1700} 1701