fdt_loader_cmd.c revision 265066
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 265066 2014-04-29 00:13:25Z 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 sym_count = symtab = strtab = 0; 132 strp = NULL; 133 134 offs = __elfN(relocation_offset); 135 136 kfp = file_findfile(NULL, NULL); 137 if (kfp == NULL) 138 return (0); 139 140 /* Locate the dynamic symbols and strtab. */ 141 md = file_findmetadata(kfp, MODINFOMD_ELFHDR); 142 if (md == NULL) 143 return (0); 144 ehdr = (Elf_Ehdr *)md->md_data; 145 146 md = file_findmetadata(kfp, MODINFOMD_SHDR); 147 if (md == NULL) 148 return (0); 149 shdr = (Elf_Shdr *)md->md_data; 150 151 for (i = 0; i < ehdr->e_shnum; ++i) { 152 if (shdr[i].sh_type == SHT_DYNSYM && symtab == 0) { 153 symtab = shdr[i].sh_addr + offs; 154 sym_count = shdr[i].sh_size / sizeof(Elf_Sym); 155 } else if (shdr[i].sh_type == SHT_STRTAB && strtab == 0) { 156 strtab = shdr[i].sh_addr + offs; 157 } 158 } 159 160 /* 161 * The most efficent way to find a symbol would be to calculate a 162 * hash, find proper bucket and chain, and thus find a symbol. 163 * However, that would involve code duplication (e.g. for hash 164 * function). So we're using simpler and a bit slower way: we're 165 * iterating through symbols, searching for the one which name is 166 * 'equal' to 'fdt_static_dtb'. To speed up the process a little bit, 167 * we are eliminating symbols type of which is not STT_NOTYPE, or(and) 168 * those which binding attribute is not STB_GLOBAL. 169 */ 170 fdt_start = 0; 171 while (sym_count > 0 && fdt_start == 0) { 172 COPYOUT(symtab, &sym, sizeof(sym)); 173 symtab += sizeof(sym); 174 --sym_count; 175 if (ELF_ST_BIND(sym.st_info) != STB_GLOBAL || 176 ELF_ST_TYPE(sym.st_info) != STT_NOTYPE) 177 continue; 178 strp = strdupout(strtab + sym.st_name); 179 if (strcmp(strp, FDT_STATIC_DTB_SYMBOL) == 0) 180 fdt_start = (vm_offset_t)sym.st_value + offs; 181 free(strp); 182 } 183 return (fdt_start); 184} 185 186static int 187fdt_load_dtb(vm_offset_t va) 188{ 189 struct fdt_header header; 190 int err; 191 192 COPYOUT(va, &header, sizeof(header)); 193 err = fdt_check_header(&header); 194 if (err < 0) { 195 if (err == -FDT_ERR_BADVERSION) 196 sprintf(command_errbuf, 197 "incompatible blob version: %d, should be: %d", 198 fdt_version(fdtp), FDT_LAST_SUPPORTED_VERSION); 199 200 else 201 sprintf(command_errbuf, "error validating blob: %s", 202 fdt_strerror(err)); 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 fdtp_va = va; 221 COPYOUT(va, fdtp, fdtp_size); 222 debugf("DTB blob found at 0x%jx, size: 0x%jx\n", (uintmax_t)va, (uintmax_t)fdtp_size); 223 224 return (0); 225} 226 227static int 228fdt_load_dtb_addr(struct fdt_header *header) 229{ 230 int err; 231 232 fdtp_size = fdt_totalsize(header); 233 err = fdt_check_header(header); 234 if (err < 0) { 235 sprintf(command_errbuf, "error validating blob: %s", 236 fdt_strerror(err)); 237 return (err); 238 } 239 free(fdtp); 240 if ((fdtp = malloc(fdtp_size)) == NULL) { 241 command_errmsg = "can't allocate memory for device tree copy"; 242 return (1); 243 } 244 245 fdtp_va = 0; // Don't write this back into module or kernel. 246 bcopy(header, fdtp, fdtp_size); 247 return (0); 248} 249 250static int 251fdt_setup_fdtp() 252{ 253 struct preloaded_file *bfp; 254 struct fdt_header *hdr; 255 const char *s; 256 char *p; 257 vm_offset_t va; 258 259 if ((bfp = file_findfile(NULL, "dtb")) != NULL) { 260 printf("Using DTB from loaded file.\n"); 261 return fdt_load_dtb(bfp->f_addr); 262 } 263 264 if (fdt_to_load != NULL) { 265 printf("Using DTB from memory address 0x%08X.\n", 266 (unsigned int)fdt_to_load); 267 return fdt_load_dtb_addr(fdt_to_load); 268 } 269 270 /* Board vendors use both fdtaddr and fdt_addr names. Grrrr. */ 271 s = ub_env_get("fdtaddr"); 272 if (s == NULL) 273 s = ub_env_get("fdt_addr"); 274 if (s != NULL && *s != '\0') { 275 hdr = (struct fdt_header *)strtoul(s, &p, 16); 276 if (*p == '\0') { 277 printf("Using DTB provided by U-Boot.\n"); 278 return fdt_load_dtb_addr(hdr); 279 } 280 } 281 282 if ((va = fdt_find_static_dtb()) != 0) { 283 printf("Using DTB compiled into kernel.\n"); 284 return (fdt_load_dtb(va)); 285 } 286 287 command_errmsg = "no device tree blob found!"; 288 return (1); 289} 290 291#define fdt_strtovect(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 292 (cellbuf), (lim), (cellsize), 0); 293 294/* Force using base 16 */ 295#define fdt_strtovectx(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 296 (cellbuf), (lim), (cellsize), 16); 297 298static int 299_fdt_strtovect(char *str, void *cellbuf, int lim, unsigned char cellsize, 300 uint8_t base) 301{ 302 char *buf = str; 303 char *end = str + strlen(str) - 2; 304 uint32_t *u32buf = NULL; 305 uint8_t *u8buf = NULL; 306 int cnt = 0; 307 308 if (cellsize == sizeof(uint32_t)) 309 u32buf = (uint32_t *)cellbuf; 310 else 311 u8buf = (uint8_t *)cellbuf; 312 313 if (lim == 0) 314 return (0); 315 316 while (buf < end) { 317 318 /* Skip white whitespace(s)/separators */ 319 while (!isxdigit(*buf) && buf < end) 320 buf++; 321 322 if (u32buf != NULL) 323 u32buf[cnt] = 324 cpu_to_fdt32((uint32_t)strtol(buf, NULL, base)); 325 326 else 327 u8buf[cnt] = (uint8_t)strtol(buf, NULL, base); 328 329 if (cnt + 1 <= lim - 1) 330 cnt++; 331 else 332 break; 333 buf++; 334 /* Find another number */ 335 while ((isxdigit(*buf) || *buf == 'x') && buf < end) 336 buf++; 337 } 338 return (cnt); 339} 340 341#define TMP_MAX_ETH 8 342 343static void 344fixup_ethernet(const char *env, char *ethstr, int *eth_no, int len) 345{ 346 char *end, *str; 347 uint8_t tmp_addr[6]; 348 int i, n; 349 350 /* Extract interface number */ 351 i = strtol(env + 3, &end, 10); 352 if (end == (env + 3)) 353 /* 'ethaddr' means interface 0 address */ 354 n = 0; 355 else 356 n = i; 357 358 if (n > TMP_MAX_ETH) 359 return; 360 361 str = ub_env_get(env); 362 363 /* Convert macaddr string into a vector of uints */ 364 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t)); 365 if (n != 0) { 366 i = strlen(env) - 7; 367 strncpy(ethstr + 8, env + 3, i); 368 } 369 /* Set actual property to a value from vect */ 370 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr), 371 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t)); 372 373 /* Clear ethernet..XXXX.. string */ 374 bzero(ethstr + 8, len - 8); 375 376 if (n + 1 > *eth_no) 377 *eth_no = n + 1; 378} 379 380static void 381fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq) 382{ 383 int lo, o = 0, o2, maxo = 0, depth; 384 const uint32_t zero = 0; 385 386 /* We want to modify every subnode of /cpus */ 387 o = fdt_path_offset(fdtp, "/cpus"); 388 if (o < 0) 389 return; 390 391 /* maxo should contain offset of node next to /cpus */ 392 depth = 0; 393 maxo = o; 394 while (depth != -1) 395 maxo = fdt_next_node(fdtp, maxo, &depth); 396 397 /* Find CPU frequency properties */ 398 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency", 399 &zero, sizeof(uint32_t)); 400 401 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero, 402 sizeof(uint32_t)); 403 404 lo = MIN(o, o2); 405 406 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) { 407 408 o = fdt_node_offset_by_prop_value(fdtp, lo, 409 "clock-frequency", &zero, sizeof(uint32_t)); 410 411 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency", 412 &zero, sizeof(uint32_t)); 413 414 /* We're only interested in /cpus subnode(s) */ 415 if (lo > maxo) 416 break; 417 418 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency", 419 (uint32_t)cpufreq); 420 421 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency", 422 (uint32_t)busfreq); 423 424 lo = MIN(o, o2); 425 } 426} 427 428static int 429fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells) 430{ 431 int cells_in_tuple, i, tuples, tuple_size; 432 uint32_t cur_start, cur_size; 433 434 cells_in_tuple = (addr_cells + size_cells); 435 tuple_size = cells_in_tuple * sizeof(uint32_t); 436 tuples = len / tuple_size; 437 if (tuples == 0) 438 return (EINVAL); 439 440 for (i = 0; i < tuples; i++) { 441 if (addr_cells == 2) 442 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]); 443 else 444 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]); 445 446 if (size_cells == 2) 447 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]); 448 else 449 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]); 450 451 if (cur_size == 0) 452 return (EINVAL); 453 454 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n", 455 i, cur_start, cur_size); 456 } 457 return (0); 458} 459 460static void 461fixup_memory(struct sys_info *si) 462{ 463 struct mem_region *curmr; 464 uint32_t addr_cells, size_cells; 465 uint32_t *addr_cellsp, *reg, *size_cellsp; 466 int err, i, len, memory, realmrno, root; 467 uint8_t *buf, *sb; 468 uint64_t rstart, rsize; 469 int reserved; 470 471 root = fdt_path_offset(fdtp, "/"); 472 if (root < 0) { 473 sprintf(command_errbuf, "Could not find root node !"); 474 return; 475 } 476 477 memory = fdt_path_offset(fdtp, "/memory"); 478 if (memory <= 0) { 479 /* Create proper '/memory' node. */ 480 memory = fdt_add_subnode(fdtp, root, "memory"); 481 if (memory <= 0) { 482 sprintf(command_errbuf, "Could not fixup '/memory' " 483 "node, error code : %d!\n", memory); 484 return; 485 } 486 487 err = fdt_setprop(fdtp, memory, "device_type", "memory", 488 sizeof("memory")); 489 490 if (err < 0) 491 return; 492 } 493 494 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells", 495 NULL); 496 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL); 497 498 if (addr_cellsp == NULL || size_cellsp == NULL) { 499 sprintf(command_errbuf, "Could not fixup '/memory' node : " 500 "%s %s property not found in root node!\n", 501 (!addr_cellsp) ? "#address-cells" : "", 502 (!size_cellsp) ? "#size-cells" : ""); 503 return; 504 } 505 506 addr_cells = fdt32_to_cpu(*addr_cellsp); 507 size_cells = fdt32_to_cpu(*size_cellsp); 508 509 /* 510 * Convert memreserve data to memreserve property 511 * Check if property already exists 512 */ 513 reserved = fdt_num_mem_rsv(fdtp); 514 if (reserved && 515 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) { 516 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t); 517 sb = buf = (uint8_t *)malloc(len); 518 if (!buf) 519 return; 520 521 bzero(buf, len); 522 523 for (i = 0; i < reserved; i++) { 524 curmr = &si->mr[i]; 525 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize)) 526 break; 527 if (rsize) { 528 /* Ensure endianess, and put cells into a buffer */ 529 if (addr_cells == 2) 530 *(uint64_t *)buf = 531 cpu_to_fdt64(rstart); 532 else 533 *(uint32_t *)buf = 534 cpu_to_fdt32(rstart); 535 536 buf += sizeof(uint32_t) * addr_cells; 537 if (size_cells == 2) 538 *(uint64_t *)buf = 539 cpu_to_fdt64(rsize); 540 else 541 *(uint32_t *)buf = 542 cpu_to_fdt32(rsize); 543 544 buf += sizeof(uint32_t) * size_cells; 545 } 546 } 547 548 /* Set property */ 549 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0) 550 printf("Could not fixup 'memreserve' property.\n"); 551 552 free(sb); 553 } 554 555 /* Count valid memory regions entries in sysinfo. */ 556 realmrno = si->mr_no; 557 for (i = 0; i < si->mr_no; i++) 558 if (si->mr[i].start == 0 && si->mr[i].size == 0) 559 realmrno--; 560 561 if (realmrno == 0) { 562 sprintf(command_errbuf, "Could not fixup '/memory' node : " 563 "sysinfo doesn't contain valid memory regions info!\n"); 564 return; 565 } 566 567 if ((reg = (uint32_t *)fdt_getprop(fdtp, memory, "reg", 568 &len)) != NULL) { 569 570 if (fdt_reg_valid(reg, len, addr_cells, size_cells) == 0) 571 /* 572 * Do not apply fixup if existing 'reg' property 573 * seems to be valid. 574 */ 575 return; 576 } 577 578 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t); 579 sb = buf = (uint8_t *)malloc(len); 580 if (!buf) 581 return; 582 583 bzero(buf, len); 584 585 for (i = 0; i < si->mr_no; i++) { 586 curmr = &si->mr[i]; 587 if (curmr->size != 0) { 588 /* Ensure endianess, and put cells into a buffer */ 589 if (addr_cells == 2) 590 *(uint64_t *)buf = 591 cpu_to_fdt64(curmr->start); 592 else 593 *(uint32_t *)buf = 594 cpu_to_fdt32(curmr->start); 595 596 buf += sizeof(uint32_t) * addr_cells; 597 if (size_cells == 2) 598 *(uint64_t *)buf = 599 cpu_to_fdt64(curmr->size); 600 else 601 *(uint32_t *)buf = 602 cpu_to_fdt32(curmr->size); 603 604 buf += sizeof(uint32_t) * size_cells; 605 } 606 } 607 608 /* Set property */ 609 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0) 610 sprintf(command_errbuf, "Could not fixup '/memory' node.\n"); 611 612 free(sb); 613} 614 615static void 616fixup_stdout(const char *env) 617{ 618 const char *str; 619 char *ptr; 620 int serialno; 621 int len, no, sero; 622 const struct fdt_property *prop; 623 char *tmp[10]; 624 625 str = ub_env_get(env); 626 ptr = (char *)str + strlen(str) - 1; 627 while (ptr > str && isdigit(*(str - 1))) 628 str--; 629 630 if (ptr == str) 631 return; 632 633 serialno = (int)strtol(ptr, NULL, 0); 634 no = fdt_path_offset(fdtp, "/chosen"); 635 if (no < 0) 636 return; 637 638 prop = fdt_get_property(fdtp, no, "stdout", &len); 639 640 /* If /chosen/stdout does not extist, create it */ 641 if (prop == NULL || (prop != NULL && len == 0)) { 642 643 bzero(tmp, 10 * sizeof(char)); 644 strcpy((char *)&tmp, "serial"); 645 if (strlen(ptr) > 3) 646 /* Serial number too long */ 647 return; 648 649 strncpy((char *)tmp + 6, ptr, 3); 650 sero = fdt_path_offset(fdtp, (const char *)tmp); 651 if (sero < 0) 652 /* 653 * If serial device we're trying to assign 654 * stdout to doesn't exist in DT -- return. 655 */ 656 return; 657 658 fdt_setprop(fdtp, no, "stdout", &tmp, 659 strlen((char *)&tmp) + 1); 660 fdt_setprop(fdtp, no, "stdin", &tmp, 661 strlen((char *)&tmp) + 1); 662 } 663} 664 665/* 666 * Locate the blob, fix it up and return its location. 667 */ 668static int 669fdt_fixup(void) 670{ 671 const char *env; 672 char *ethstr; 673 int chosen, eth_no, len; 674 struct sys_info *si; 675 676 env = NULL; 677 eth_no = 0; 678 ethstr = NULL; 679 len = 0; 680 681 if (fdtp == NULL && fdt_setup_fdtp() != 0) 682 return (0); 683 684 /* Create /chosen node (if not exists) */ 685 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) == 686 -FDT_ERR_NOTFOUND) 687 chosen = fdt_add_subnode(fdtp, 0, "chosen"); 688 689 /* Value assigned to fixup-applied does not matter. */ 690 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL)) 691 return (1); 692 693 /* Acquire sys_info */ 694 si = ub_get_sys_info(); 695 696 while ((env = ub_env_enum(env)) != NULL) { 697 if (strncmp(env, "eth", 3) == 0 && 698 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) { 699 /* 700 * Handle Ethernet addrs: parse uboot env eth%daddr 701 */ 702 703 if (!eth_no) { 704 /* 705 * Check how many chars we will need to store 706 * maximal eth iface number. 707 */ 708 len = strlen(STRINGIFY(TMP_MAX_ETH)) + 709 strlen("ethernet"); 710 711 /* 712 * Reserve mem for string "ethernet" and len 713 * chars for iface no. 714 */ 715 ethstr = (char *)malloc(len * sizeof(char)); 716 bzero(ethstr, len * sizeof(char)); 717 strcpy(ethstr, "ethernet0"); 718 } 719 720 /* Modify blob */ 721 fixup_ethernet(env, ethstr, ð_no, len); 722 723 } else if (strcmp(env, "consoledev") == 0) 724 fixup_stdout(env); 725 } 726 727 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */ 728 fixup_cpubusfreqs(si->clk_cpu, si->clk_bus); 729 730 /* Fixup memory regions */ 731 fixup_memory(si); 732 733 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0); 734 return (1); 735} 736 737/* 738 * Copy DTB blob to specified location and return size 739 */ 740int 741fdt_copy(vm_offset_t va) 742{ 743 int err; 744 745 if (fdtp == NULL) { 746 err = fdt_setup_fdtp(); 747 if (err) { 748 printf("No valid device tree blob found!\n"); 749 return (0); 750 } 751 } 752 753 if (fdt_fixup() == 0) 754 return (0); 755 756 if (fdtp_va != 0) { 757 /* Overwrite the FDT with the fixed version. */ 758 /* XXX Is this really appropriate? */ 759 COPYIN(fdtp, fdtp_va, fdtp_size); 760 } 761 COPYIN(fdtp, va, fdtp_size); 762 return (fdtp_size); 763} 764 765 766 767int 768command_fdt_internal(int argc, char *argv[]) 769{ 770 cmdf_t *cmdh; 771 int flags; 772 char *cmd; 773 int i, err; 774 775 if (argc < 2) { 776 command_errmsg = "usage is 'fdt <command> [<args>]"; 777 return (CMD_ERROR); 778 } 779 780 /* 781 * Validate fdt <command>. 782 */ 783 cmd = strdup(argv[1]); 784 i = 0; 785 cmdh = NULL; 786 while (!(commands[i].name == NULL)) { 787 if (strcmp(cmd, commands[i].name) == 0) { 788 /* found it */ 789 cmdh = commands[i].handler; 790 flags = commands[i].flags; 791 break; 792 } 793 i++; 794 } 795 if (cmdh == NULL) { 796 command_errmsg = "unknown command"; 797 return (CMD_ERROR); 798 } 799 800 if (flags & CMD_REQUIRES_BLOB) { 801 /* 802 * Check if uboot env vars were parsed already. If not, do it now. 803 */ 804 if (fdt_fixup() == 0) 805 return (CMD_ERROR); 806 } 807 808 /* 809 * Call command handler. 810 */ 811 err = (*cmdh)(argc, argv); 812 813 return (err); 814} 815 816static int 817fdt_cmd_addr(int argc, char *argv[]) 818{ 819 struct preloaded_file *fp; 820 struct fdt_header *hdr; 821 const char *addr; 822 char *cp; 823 824 fdt_to_load = NULL; 825 826 if (argc > 2) 827 addr = argv[2]; 828 else { 829 sprintf(command_errbuf, "no address specified"); 830 return (CMD_ERROR); 831 } 832 833 hdr = (struct fdt_header *)strtoul(addr, &cp, 16); 834 if (cp == addr) { 835 sprintf(command_errbuf, "Invalid address: %s", addr); 836 return (CMD_ERROR); 837 } 838 839 while ((fp = file_findfile(NULL, "dtb")) != NULL) { 840 file_discard(fp); 841 } 842 843 fdt_to_load = hdr; 844 return (CMD_OK); 845} 846 847static int 848fdt_cmd_cd(int argc, char *argv[]) 849{ 850 char *path; 851 char tmp[FDT_CWD_LEN]; 852 int len, o; 853 854 path = (argc > 2) ? argv[2] : "/"; 855 856 if (path[0] == '/') { 857 len = strlen(path); 858 if (len >= FDT_CWD_LEN) 859 goto fail; 860 } else { 861 /* Handle path specification relative to cwd */ 862 len = strlen(cwd) + strlen(path) + 1; 863 if (len >= FDT_CWD_LEN) 864 goto fail; 865 866 strcpy(tmp, cwd); 867 strcat(tmp, "/"); 868 strcat(tmp, path); 869 path = tmp; 870 } 871 872 o = fdt_path_offset(fdtp, path); 873 if (o < 0) { 874 sprintf(command_errbuf, "could not find node: '%s'", path); 875 return (CMD_ERROR); 876 } 877 878 strcpy(cwd, path); 879 return (CMD_OK); 880 881fail: 882 sprintf(command_errbuf, "path too long: %d, max allowed: %d", 883 len, FDT_CWD_LEN - 1); 884 return (CMD_ERROR); 885} 886 887static int 888fdt_cmd_hdr(int argc __unused, char *argv[] __unused) 889{ 890 char line[80]; 891 int ver; 892 893 if (fdtp == NULL) { 894 command_errmsg = "no device tree blob pointer?!"; 895 return (CMD_ERROR); 896 } 897 898 ver = fdt_version(fdtp); 899 pager_open(); 900 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp); 901 pager_output(line); 902 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp)); 903 pager_output(line); 904 sprintf(line, " size = %d\n", fdt_totalsize(fdtp)); 905 pager_output(line); 906 sprintf(line, " off_dt_struct = 0x%08x\n", 907 fdt_off_dt_struct(fdtp)); 908 pager_output(line); 909 sprintf(line, " off_dt_strings = 0x%08x\n", 910 fdt_off_dt_strings(fdtp)); 911 pager_output(line); 912 sprintf(line, " off_mem_rsvmap = 0x%08x\n", 913 fdt_off_mem_rsvmap(fdtp)); 914 pager_output(line); 915 sprintf(line, " version = %d\n", ver); 916 pager_output(line); 917 sprintf(line, " last compatible version = %d\n", 918 fdt_last_comp_version(fdtp)); 919 pager_output(line); 920 if (ver >= 2) { 921 sprintf(line, " boot_cpuid = %d\n", 922 fdt_boot_cpuid_phys(fdtp)); 923 pager_output(line); 924 } 925 if (ver >= 3) { 926 sprintf(line, " size_dt_strings = %d\n", 927 fdt_size_dt_strings(fdtp)); 928 pager_output(line); 929 } 930 if (ver >= 17) { 931 sprintf(line, " size_dt_struct = %d\n", 932 fdt_size_dt_struct(fdtp)); 933 pager_output(line); 934 } 935 pager_close(); 936 937 return (CMD_OK); 938} 939 940static int 941fdt_cmd_ls(int argc, char *argv[]) 942{ 943 const char *prevname[FDT_MAX_DEPTH] = { NULL }; 944 const char *name; 945 char *path; 946 int i, o, depth, len; 947 948 path = (argc > 2) ? argv[2] : NULL; 949 if (path == NULL) 950 path = cwd; 951 952 o = fdt_path_offset(fdtp, path); 953 if (o < 0) { 954 sprintf(command_errbuf, "could not find node: '%s'", path); 955 return (CMD_ERROR); 956 } 957 958 for (depth = 0; 959 (o >= 0) && (depth >= 0); 960 o = fdt_next_node(fdtp, o, &depth)) { 961 962 name = fdt_get_name(fdtp, o, &len); 963 964 if (depth > FDT_MAX_DEPTH) { 965 printf("max depth exceeded: %d\n", depth); 966 continue; 967 } 968 969 prevname[depth] = name; 970 971 /* Skip root (i = 1) when printing devices */ 972 for (i = 1; i <= depth; i++) { 973 if (prevname[i] == NULL) 974 break; 975 976 if (strcmp(cwd, "/") == 0) 977 printf("/"); 978 printf("%s", prevname[i]); 979 } 980 printf("\n"); 981 } 982 983 return (CMD_OK); 984} 985 986static __inline int 987isprint(int c) 988{ 989 990 return (c >= ' ' && c <= 0x7e); 991} 992 993static int 994fdt_isprint(const void *data, int len, int *count) 995{ 996 const char *d; 997 char ch; 998 int yesno, i; 999 1000 if (len == 0) 1001 return (0); 1002 1003 d = (const char *)data; 1004 if (d[len - 1] != '\0') 1005 return (0); 1006 1007 *count = 0; 1008 yesno = 1; 1009 for (i = 0; i < len; i++) { 1010 ch = *(d + i); 1011 if (isprint(ch) || (ch == '\0' && i > 0)) { 1012 /* Count strings */ 1013 if (ch == '\0') 1014 (*count)++; 1015 continue; 1016 } 1017 1018 yesno = 0; 1019 break; 1020 } 1021 1022 return (yesno); 1023} 1024 1025static int 1026fdt_data_str(const void *data, int len, int count, char **buf) 1027{ 1028 char *b, *tmp; 1029 const char *d; 1030 int buf_len, i, l; 1031 1032 /* 1033 * Calculate the length for the string and allocate memory. 1034 * 1035 * Note that 'len' already includes at least one terminator. 1036 */ 1037 buf_len = len; 1038 if (count > 1) { 1039 /* 1040 * Each token had already a terminator buried in 'len', but we 1041 * only need one eventually, don't count space for these. 1042 */ 1043 buf_len -= count - 1; 1044 1045 /* Each consecutive token requires a ", " separator. */ 1046 buf_len += count * 2; 1047 } 1048 1049 /* Add some space for surrounding double quotes. */ 1050 buf_len += count * 2; 1051 1052 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */ 1053 b = (char *)malloc(buf_len); 1054 tmp = (char *)malloc(buf_len); 1055 if (b == NULL) 1056 goto error; 1057 1058 if (tmp == NULL) { 1059 free(b); 1060 goto error; 1061 } 1062 1063 b[0] = '\0'; 1064 1065 /* 1066 * Now that we have space, format the string. 1067 */ 1068 i = 0; 1069 do { 1070 d = (const char *)data + i; 1071 l = strlen(d) + 1; 1072 1073 sprintf(tmp, "\"%s\"%s", d, 1074 (i + l) < len ? ", " : ""); 1075 strcat(b, tmp); 1076 1077 i += l; 1078 1079 } while (i < len); 1080 *buf = b; 1081 1082 free(tmp); 1083 1084 return (0); 1085error: 1086 return (1); 1087} 1088 1089static int 1090fdt_data_cell(const void *data, int len, char **buf) 1091{ 1092 char *b, *tmp; 1093 const uint32_t *c; 1094 int count, i, l; 1095 1096 /* Number of cells */ 1097 count = len / 4; 1098 1099 /* 1100 * Calculate the length for the string and allocate memory. 1101 */ 1102 1103 /* Each byte translates to 2 output characters */ 1104 l = len * 2; 1105 if (count > 1) { 1106 /* Each consecutive cell requires a " " separator. */ 1107 l += (count - 1) * 1; 1108 } 1109 /* Each cell will have a "0x" prefix */ 1110 l += count * 2; 1111 /* Space for surrounding <> and terminator */ 1112 l += 3; 1113 1114 b = (char *)malloc(l); 1115 tmp = (char *)malloc(l); 1116 if (b == NULL) 1117 goto error; 1118 1119 if (tmp == NULL) { 1120 free(b); 1121 goto error; 1122 } 1123 1124 b[0] = '\0'; 1125 strcat(b, "<"); 1126 1127 for (i = 0; i < len; i += 4) { 1128 c = (const uint32_t *)((const uint8_t *)data + i); 1129 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c), 1130 i < (len - 4) ? " " : ""); 1131 strcat(b, tmp); 1132 } 1133 strcat(b, ">"); 1134 *buf = b; 1135 1136 free(tmp); 1137 1138 return (0); 1139error: 1140 return (1); 1141} 1142 1143static int 1144fdt_data_bytes(const void *data, int len, char **buf) 1145{ 1146 char *b, *tmp; 1147 const char *d; 1148 int i, l; 1149 1150 /* 1151 * Calculate the length for the string and allocate memory. 1152 */ 1153 1154 /* Each byte translates to 2 output characters */ 1155 l = len * 2; 1156 if (len > 1) 1157 /* Each consecutive byte requires a " " separator. */ 1158 l += (len - 1) * 1; 1159 /* Each byte will have a "0x" prefix */ 1160 l += len * 2; 1161 /* Space for surrounding [] and terminator. */ 1162 l += 3; 1163 1164 b = (char *)malloc(l); 1165 tmp = (char *)malloc(l); 1166 if (b == NULL) 1167 goto error; 1168 1169 if (tmp == NULL) { 1170 free(b); 1171 goto error; 1172 } 1173 1174 b[0] = '\0'; 1175 strcat(b, "["); 1176 1177 for (i = 0, d = data; i < len; i++) { 1178 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : ""); 1179 strcat(b, tmp); 1180 } 1181 strcat(b, "]"); 1182 *buf = b; 1183 1184 free(tmp); 1185 1186 return (0); 1187error: 1188 return (1); 1189} 1190 1191static int 1192fdt_data_fmt(const void *data, int len, char **buf) 1193{ 1194 int count; 1195 1196 if (len == 0) { 1197 *buf = NULL; 1198 return (1); 1199 } 1200 1201 if (fdt_isprint(data, len, &count)) 1202 return (fdt_data_str(data, len, count, buf)); 1203 1204 else if ((len % 4) == 0) 1205 return (fdt_data_cell(data, len, buf)); 1206 1207 else 1208 return (fdt_data_bytes(data, len, buf)); 1209} 1210 1211static int 1212fdt_prop(int offset) 1213{ 1214 char *line, *buf; 1215 const struct fdt_property *prop; 1216 const char *name; 1217 const void *data; 1218 int len, rv; 1219 1220 line = NULL; 1221 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop)); 1222 if (prop == NULL) 1223 return (1); 1224 1225 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)); 1226 len = fdt32_to_cpu(prop->len); 1227 1228 rv = 0; 1229 buf = NULL; 1230 if (len == 0) { 1231 /* Property without value */ 1232 line = (char *)malloc(strlen(name) + 2); 1233 if (line == NULL) { 1234 rv = 2; 1235 goto out2; 1236 } 1237 sprintf(line, "%s\n", name); 1238 goto out1; 1239 } 1240 1241 /* 1242 * Process property with value 1243 */ 1244 data = prop->data; 1245 1246 if (fdt_data_fmt(data, len, &buf) != 0) { 1247 rv = 3; 1248 goto out2; 1249 } 1250 1251 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) + 1252 strlen(buf) + 2); 1253 if (line == NULL) { 1254 sprintf(command_errbuf, "could not allocate space for string"); 1255 rv = 4; 1256 goto out2; 1257 } 1258 1259 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf); 1260 1261out1: 1262 pager_open(); 1263 pager_output(line); 1264 pager_close(); 1265 1266out2: 1267 if (buf) 1268 free(buf); 1269 1270 if (line) 1271 free(line); 1272 1273 return (rv); 1274} 1275 1276static int 1277fdt_modprop(int nodeoff, char *propname, void *value, char mode) 1278{ 1279 uint32_t cells[100]; 1280 char *buf; 1281 int len, rv; 1282 const struct fdt_property *p; 1283 1284 p = fdt_get_property(fdtp, nodeoff, propname, NULL); 1285 1286 if (p != NULL) { 1287 if (mode == 1) { 1288 /* Adding inexistant value in mode 1 is forbidden */ 1289 sprintf(command_errbuf, "property already exists!"); 1290 return (CMD_ERROR); 1291 } 1292 } else if (mode == 0) { 1293 sprintf(command_errbuf, "property does not exist!"); 1294 return (CMD_ERROR); 1295 } 1296 len = strlen(value); 1297 rv = 0; 1298 buf = (char *)value; 1299 1300 switch (*buf) { 1301 case '&': 1302 /* phandles */ 1303 break; 1304 case '<': 1305 /* Data cells */ 1306 len = fdt_strtovect(buf, (void *)&cells, 100, 1307 sizeof(uint32_t)); 1308 1309 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1310 len * sizeof(uint32_t)); 1311 break; 1312 case '[': 1313 /* Data bytes */ 1314 len = fdt_strtovect(buf, (void *)&cells, 100, 1315 sizeof(uint8_t)); 1316 1317 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1318 len * sizeof(uint8_t)); 1319 break; 1320 case '"': 1321 default: 1322 /* Default -- string */ 1323 rv = fdt_setprop_string(fdtp, nodeoff, propname, value); 1324 break; 1325 } 1326 1327 if (rv != 0) { 1328 if (rv == -FDT_ERR_NOSPACE) 1329 sprintf(command_errbuf, 1330 "Device tree blob is too small!\n"); 1331 else 1332 sprintf(command_errbuf, 1333 "Could not add/modify property!\n"); 1334 } 1335 return (rv); 1336} 1337 1338/* Merge strings from argv into a single string */ 1339static int 1340fdt_merge_strings(int argc, char *argv[], int start, char **buffer) 1341{ 1342 char *buf; 1343 int i, idx, sz; 1344 1345 *buffer = NULL; 1346 sz = 0; 1347 1348 for (i = start; i < argc; i++) 1349 sz += strlen(argv[i]); 1350 1351 /* Additional bytes for whitespaces between args */ 1352 sz += argc - start; 1353 1354 buf = (char *)malloc(sizeof(char) * sz); 1355 bzero(buf, sizeof(char) * sz); 1356 1357 if (buf == NULL) { 1358 sprintf(command_errbuf, "could not allocate space " 1359 "for string"); 1360 return (1); 1361 } 1362 1363 idx = 0; 1364 for (i = start, idx = 0; i < argc; i++) { 1365 strcpy(buf + idx, argv[i]); 1366 idx += strlen(argv[i]); 1367 buf[idx] = ' '; 1368 idx++; 1369 } 1370 buf[sz - 1] = '\0'; 1371 *buffer = buf; 1372 return (0); 1373} 1374 1375/* Extract offset and name of node/property from a given path */ 1376static int 1377fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff) 1378{ 1379 int o; 1380 char *path = *pathp, *name = NULL, *subpath = NULL; 1381 1382 subpath = strrchr(path, '/'); 1383 if (subpath == NULL) { 1384 o = fdt_path_offset(fdtp, cwd); 1385 name = path; 1386 path = (char *)&cwd; 1387 } else { 1388 *subpath = '\0'; 1389 if (strlen(path) == 0) 1390 path = cwd; 1391 1392 name = subpath + 1; 1393 o = fdt_path_offset(fdtp, path); 1394 } 1395 1396 if (strlen(name) == 0) { 1397 sprintf(command_errbuf, "name not specified"); 1398 return (1); 1399 } 1400 if (o < 0) { 1401 sprintf(command_errbuf, "could not find node: '%s'", path); 1402 return (1); 1403 } 1404 *namep = name; 1405 *nodeoff = o; 1406 *pathp = path; 1407 return (0); 1408} 1409 1410static int 1411fdt_cmd_prop(int argc, char *argv[]) 1412{ 1413 char *path, *propname, *value; 1414 int o, next, depth, rv; 1415 uint32_t tag; 1416 1417 path = (argc > 2) ? argv[2] : NULL; 1418 1419 value = NULL; 1420 1421 if (argc > 3) { 1422 /* Merge property value strings into one */ 1423 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1424 return (CMD_ERROR); 1425 } else 1426 value = NULL; 1427 1428 if (path == NULL) 1429 path = cwd; 1430 1431 rv = CMD_OK; 1432 1433 if (value) { 1434 /* If value is specified -- try to modify prop. */ 1435 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1436 return (CMD_ERROR); 1437 1438 rv = fdt_modprop(o, propname, value, 0); 1439 if (rv) 1440 return (CMD_ERROR); 1441 return (CMD_OK); 1442 1443 } 1444 /* User wants to display properties */ 1445 o = fdt_path_offset(fdtp, path); 1446 1447 if (o < 0) { 1448 sprintf(command_errbuf, "could not find node: '%s'", path); 1449 rv = CMD_ERROR; 1450 goto out; 1451 } 1452 1453 depth = 0; 1454 while (depth >= 0) { 1455 tag = fdt_next_tag(fdtp, o, &next); 1456 switch (tag) { 1457 case FDT_NOP: 1458 break; 1459 case FDT_PROP: 1460 if (depth > 1) 1461 /* Don't process properties of nested nodes */ 1462 break; 1463 1464 if (fdt_prop(o) != 0) { 1465 sprintf(command_errbuf, "could not process " 1466 "property"); 1467 rv = CMD_ERROR; 1468 goto out; 1469 } 1470 break; 1471 case FDT_BEGIN_NODE: 1472 depth++; 1473 if (depth > FDT_MAX_DEPTH) { 1474 printf("warning: nesting too deep: %d\n", 1475 depth); 1476 goto out; 1477 } 1478 break; 1479 case FDT_END_NODE: 1480 depth--; 1481 if (depth == 0) 1482 /* 1483 * This is the end of our starting node, force 1484 * the loop finish. 1485 */ 1486 depth--; 1487 break; 1488 } 1489 o = next; 1490 } 1491out: 1492 return (rv); 1493} 1494 1495static int 1496fdt_cmd_mkprop(int argc, char *argv[]) 1497{ 1498 int o; 1499 char *path, *propname, *value; 1500 1501 path = (argc > 2) ? argv[2] : NULL; 1502 1503 value = NULL; 1504 1505 if (argc > 3) { 1506 /* Merge property value strings into one */ 1507 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1508 return (CMD_ERROR); 1509 } else 1510 value = NULL; 1511 1512 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1513 return (CMD_ERROR); 1514 1515 if (fdt_modprop(o, propname, value, 1)) 1516 return (CMD_ERROR); 1517 1518 return (CMD_OK); 1519} 1520 1521static int 1522fdt_cmd_rm(int argc, char *argv[]) 1523{ 1524 int o, rv; 1525 char *path = NULL, *propname; 1526 1527 if (argc > 2) 1528 path = argv[2]; 1529 else { 1530 sprintf(command_errbuf, "no node/property name specified"); 1531 return (CMD_ERROR); 1532 } 1533 1534 o = fdt_path_offset(fdtp, path); 1535 if (o < 0) { 1536 /* If node not found -- try to find & delete property */ 1537 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1538 return (CMD_ERROR); 1539 1540 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) { 1541 sprintf(command_errbuf, "could not delete" 1542 "%s\n", (rv == -FDT_ERR_NOTFOUND) ? 1543 "(property/node does not exist)" : ""); 1544 return (CMD_ERROR); 1545 1546 } else 1547 return (CMD_OK); 1548 } 1549 /* If node exists -- remove node */ 1550 rv = fdt_del_node(fdtp, o); 1551 if (rv) { 1552 sprintf(command_errbuf, "could not delete node"); 1553 return (CMD_ERROR); 1554 } 1555 return (CMD_OK); 1556} 1557 1558static int 1559fdt_cmd_mknode(int argc, char *argv[]) 1560{ 1561 int o, rv; 1562 char *path = NULL, *nodename = NULL; 1563 1564 if (argc > 2) 1565 path = argv[2]; 1566 else { 1567 sprintf(command_errbuf, "no node name specified"); 1568 return (CMD_ERROR); 1569 } 1570 1571 if (fdt_extract_nameloc(&path, &nodename, &o) != 0) 1572 return (CMD_ERROR); 1573 1574 rv = fdt_add_subnode(fdtp, o, nodename); 1575 1576 if (rv < 0) { 1577 if (rv == -FDT_ERR_NOSPACE) 1578 sprintf(command_errbuf, 1579 "Device tree blob is too small!\n"); 1580 else 1581 sprintf(command_errbuf, 1582 "Could not add node!\n"); 1583 return (CMD_ERROR); 1584 } 1585 return (CMD_OK); 1586} 1587 1588static int 1589fdt_cmd_pwd(int argc, char *argv[]) 1590{ 1591 char line[FDT_CWD_LEN]; 1592 1593 pager_open(); 1594 sprintf(line, "%s\n", cwd); 1595 pager_output(line); 1596 pager_close(); 1597 return (CMD_OK); 1598} 1599 1600static int 1601fdt_cmd_mres(int argc, char *argv[]) 1602{ 1603 uint64_t start, size; 1604 int i, total; 1605 char line[80]; 1606 1607 pager_open(); 1608 total = fdt_num_mem_rsv(fdtp); 1609 if (total > 0) { 1610 pager_output("Reserved memory regions:\n"); 1611 for (i = 0; i < total; i++) { 1612 fdt_get_mem_rsv(fdtp, i, &start, &size); 1613 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n", 1614 i, start, size); 1615 pager_output(line); 1616 } 1617 } else 1618 pager_output("No reserved memory regions\n"); 1619 pager_close(); 1620 1621 return (CMD_OK); 1622} 1623 1624static int 1625fdt_cmd_nyi(int argc, char *argv[]) 1626{ 1627 1628 printf("command not yet implemented\n"); 1629 return (CMD_ERROR); 1630} 1631