fdt_loader_cmd.c revision 265065
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 265065 2014-04-29 00:09:48Z 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 s = ub_env_get("fdtaddr"); 271 if (s != NULL && *s != '\0') { 272 hdr = (struct fdt_header *)strtoul(s, &p, 16); 273 if (*p == '\0') { 274 printf("Using DTB provided by U-Boot.\n"); 275 return fdt_load_dtb_addr(hdr); 276 } 277 } 278 279 if ((va = fdt_find_static_dtb()) != 0) { 280 printf("Using DTB compiled into kernel.\n"); 281 return (fdt_load_dtb(va)); 282 } 283 284 command_errmsg = "no device tree blob found!"; 285 return (1); 286} 287 288#define fdt_strtovect(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 289 (cellbuf), (lim), (cellsize), 0); 290 291/* Force using base 16 */ 292#define fdt_strtovectx(str, cellbuf, lim, cellsize) _fdt_strtovect((str), \ 293 (cellbuf), (lim), (cellsize), 16); 294 295static int 296_fdt_strtovect(char *str, void *cellbuf, int lim, unsigned char cellsize, 297 uint8_t base) 298{ 299 char *buf = str; 300 char *end = str + strlen(str) - 2; 301 uint32_t *u32buf = NULL; 302 uint8_t *u8buf = NULL; 303 int cnt = 0; 304 305 if (cellsize == sizeof(uint32_t)) 306 u32buf = (uint32_t *)cellbuf; 307 else 308 u8buf = (uint8_t *)cellbuf; 309 310 if (lim == 0) 311 return (0); 312 313 while (buf < end) { 314 315 /* Skip white whitespace(s)/separators */ 316 while (!isxdigit(*buf) && buf < end) 317 buf++; 318 319 if (u32buf != NULL) 320 u32buf[cnt] = 321 cpu_to_fdt32((uint32_t)strtol(buf, NULL, base)); 322 323 else 324 u8buf[cnt] = (uint8_t)strtol(buf, NULL, base); 325 326 if (cnt + 1 <= lim - 1) 327 cnt++; 328 else 329 break; 330 buf++; 331 /* Find another number */ 332 while ((isxdigit(*buf) || *buf == 'x') && buf < end) 333 buf++; 334 } 335 return (cnt); 336} 337 338#define TMP_MAX_ETH 8 339 340static void 341fixup_ethernet(const char *env, char *ethstr, int *eth_no, int len) 342{ 343 char *end, *str; 344 uint8_t tmp_addr[6]; 345 int i, n; 346 347 /* Extract interface number */ 348 i = strtol(env + 3, &end, 10); 349 if (end == (env + 3)) 350 /* 'ethaddr' means interface 0 address */ 351 n = 0; 352 else 353 n = i; 354 355 if (n > TMP_MAX_ETH) 356 return; 357 358 str = ub_env_get(env); 359 360 /* Convert macaddr string into a vector of uints */ 361 fdt_strtovectx(str, &tmp_addr, 6, sizeof(uint8_t)); 362 if (n != 0) { 363 i = strlen(env) - 7; 364 strncpy(ethstr + 8, env + 3, i); 365 } 366 /* Set actual property to a value from vect */ 367 fdt_setprop(fdtp, fdt_path_offset(fdtp, ethstr), 368 "local-mac-address", &tmp_addr, 6 * sizeof(uint8_t)); 369 370 /* Clear ethernet..XXXX.. string */ 371 bzero(ethstr + 8, len - 8); 372 373 if (n + 1 > *eth_no) 374 *eth_no = n + 1; 375} 376 377static void 378fixup_cpubusfreqs(unsigned long cpufreq, unsigned long busfreq) 379{ 380 int lo, o = 0, o2, maxo = 0, depth; 381 const uint32_t zero = 0; 382 383 /* We want to modify every subnode of /cpus */ 384 o = fdt_path_offset(fdtp, "/cpus"); 385 if (o < 0) 386 return; 387 388 /* maxo should contain offset of node next to /cpus */ 389 depth = 0; 390 maxo = o; 391 while (depth != -1) 392 maxo = fdt_next_node(fdtp, maxo, &depth); 393 394 /* Find CPU frequency properties */ 395 o = fdt_node_offset_by_prop_value(fdtp, o, "clock-frequency", 396 &zero, sizeof(uint32_t)); 397 398 o2 = fdt_node_offset_by_prop_value(fdtp, o, "bus-frequency", &zero, 399 sizeof(uint32_t)); 400 401 lo = MIN(o, o2); 402 403 while (o != -FDT_ERR_NOTFOUND && o2 != -FDT_ERR_NOTFOUND) { 404 405 o = fdt_node_offset_by_prop_value(fdtp, lo, 406 "clock-frequency", &zero, sizeof(uint32_t)); 407 408 o2 = fdt_node_offset_by_prop_value(fdtp, lo, "bus-frequency", 409 &zero, sizeof(uint32_t)); 410 411 /* We're only interested in /cpus subnode(s) */ 412 if (lo > maxo) 413 break; 414 415 fdt_setprop_inplace_cell(fdtp, lo, "clock-frequency", 416 (uint32_t)cpufreq); 417 418 fdt_setprop_inplace_cell(fdtp, lo, "bus-frequency", 419 (uint32_t)busfreq); 420 421 lo = MIN(o, o2); 422 } 423} 424 425static int 426fdt_reg_valid(uint32_t *reg, int len, int addr_cells, int size_cells) 427{ 428 int cells_in_tuple, i, tuples, tuple_size; 429 uint32_t cur_start, cur_size; 430 431 cells_in_tuple = (addr_cells + size_cells); 432 tuple_size = cells_in_tuple * sizeof(uint32_t); 433 tuples = len / tuple_size; 434 if (tuples == 0) 435 return (EINVAL); 436 437 for (i = 0; i < tuples; i++) { 438 if (addr_cells == 2) 439 cur_start = fdt64_to_cpu(reg[i * cells_in_tuple]); 440 else 441 cur_start = fdt32_to_cpu(reg[i * cells_in_tuple]); 442 443 if (size_cells == 2) 444 cur_size = fdt64_to_cpu(reg[i * cells_in_tuple + 2]); 445 else 446 cur_size = fdt32_to_cpu(reg[i * cells_in_tuple + 1]); 447 448 if (cur_size == 0) 449 return (EINVAL); 450 451 debugf(" reg#%d (start: 0x%0x size: 0x%0x) valid!\n", 452 i, cur_start, cur_size); 453 } 454 return (0); 455} 456 457static void 458fixup_memory(struct sys_info *si) 459{ 460 struct mem_region *curmr; 461 uint32_t addr_cells, size_cells; 462 uint32_t *addr_cellsp, *reg, *size_cellsp; 463 int err, i, len, memory, realmrno, root; 464 uint8_t *buf, *sb; 465 uint64_t rstart, rsize; 466 int reserved; 467 468 root = fdt_path_offset(fdtp, "/"); 469 if (root < 0) { 470 sprintf(command_errbuf, "Could not find root node !"); 471 return; 472 } 473 474 memory = fdt_path_offset(fdtp, "/memory"); 475 if (memory <= 0) { 476 /* Create proper '/memory' node. */ 477 memory = fdt_add_subnode(fdtp, root, "memory"); 478 if (memory <= 0) { 479 sprintf(command_errbuf, "Could not fixup '/memory' " 480 "node, error code : %d!\n", memory); 481 return; 482 } 483 484 err = fdt_setprop(fdtp, memory, "device_type", "memory", 485 sizeof("memory")); 486 487 if (err < 0) 488 return; 489 } 490 491 addr_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#address-cells", 492 NULL); 493 size_cellsp = (uint32_t *)fdt_getprop(fdtp, root, "#size-cells", NULL); 494 495 if (addr_cellsp == NULL || size_cellsp == NULL) { 496 sprintf(command_errbuf, "Could not fixup '/memory' node : " 497 "%s %s property not found in root node!\n", 498 (!addr_cellsp) ? "#address-cells" : "", 499 (!size_cellsp) ? "#size-cells" : ""); 500 return; 501 } 502 503 addr_cells = fdt32_to_cpu(*addr_cellsp); 504 size_cells = fdt32_to_cpu(*size_cellsp); 505 506 /* 507 * Convert memreserve data to memreserve property 508 * Check if property already exists 509 */ 510 reserved = fdt_num_mem_rsv(fdtp); 511 if (reserved && 512 (fdt_getprop(fdtp, root, "memreserve", NULL) == NULL)) { 513 len = (addr_cells + size_cells) * reserved * sizeof(uint32_t); 514 sb = buf = (uint8_t *)malloc(len); 515 if (!buf) 516 return; 517 518 bzero(buf, len); 519 520 for (i = 0; i < reserved; i++) { 521 curmr = &si->mr[i]; 522 if (fdt_get_mem_rsv(fdtp, i, &rstart, &rsize)) 523 break; 524 if (rsize) { 525 /* Ensure endianess, and put cells into a buffer */ 526 if (addr_cells == 2) 527 *(uint64_t *)buf = 528 cpu_to_fdt64(rstart); 529 else 530 *(uint32_t *)buf = 531 cpu_to_fdt32(rstart); 532 533 buf += sizeof(uint32_t) * addr_cells; 534 if (size_cells == 2) 535 *(uint64_t *)buf = 536 cpu_to_fdt64(rsize); 537 else 538 *(uint32_t *)buf = 539 cpu_to_fdt32(rsize); 540 541 buf += sizeof(uint32_t) * size_cells; 542 } 543 } 544 545 /* Set property */ 546 if ((err = fdt_setprop(fdtp, root, "memreserve", sb, len)) < 0) 547 printf("Could not fixup 'memreserve' property.\n"); 548 549 free(sb); 550 } 551 552 /* Count valid memory regions entries in sysinfo. */ 553 realmrno = si->mr_no; 554 for (i = 0; i < si->mr_no; i++) 555 if (si->mr[i].start == 0 && si->mr[i].size == 0) 556 realmrno--; 557 558 if (realmrno == 0) { 559 sprintf(command_errbuf, "Could not fixup '/memory' node : " 560 "sysinfo doesn't contain valid memory regions info!\n"); 561 return; 562 } 563 564 if ((reg = (uint32_t *)fdt_getprop(fdtp, memory, "reg", 565 &len)) != NULL) { 566 567 if (fdt_reg_valid(reg, len, addr_cells, size_cells) == 0) 568 /* 569 * Do not apply fixup if existing 'reg' property 570 * seems to be valid. 571 */ 572 return; 573 } 574 575 len = (addr_cells + size_cells) * realmrno * sizeof(uint32_t); 576 sb = buf = (uint8_t *)malloc(len); 577 if (!buf) 578 return; 579 580 bzero(buf, len); 581 582 for (i = 0; i < si->mr_no; i++) { 583 curmr = &si->mr[i]; 584 if (curmr->size != 0) { 585 /* Ensure endianess, and put cells into a buffer */ 586 if (addr_cells == 2) 587 *(uint64_t *)buf = 588 cpu_to_fdt64(curmr->start); 589 else 590 *(uint32_t *)buf = 591 cpu_to_fdt32(curmr->start); 592 593 buf += sizeof(uint32_t) * addr_cells; 594 if (size_cells == 2) 595 *(uint64_t *)buf = 596 cpu_to_fdt64(curmr->size); 597 else 598 *(uint32_t *)buf = 599 cpu_to_fdt32(curmr->size); 600 601 buf += sizeof(uint32_t) * size_cells; 602 } 603 } 604 605 /* Set property */ 606 if ((err = fdt_setprop(fdtp, memory, "reg", sb, len)) < 0) 607 sprintf(command_errbuf, "Could not fixup '/memory' node.\n"); 608 609 free(sb); 610} 611 612static void 613fixup_stdout(const char *env) 614{ 615 const char *str; 616 char *ptr; 617 int serialno; 618 int len, no, sero; 619 const struct fdt_property *prop; 620 char *tmp[10]; 621 622 str = ub_env_get(env); 623 ptr = (char *)str + strlen(str) - 1; 624 while (ptr > str && isdigit(*(str - 1))) 625 str--; 626 627 if (ptr == str) 628 return; 629 630 serialno = (int)strtol(ptr, NULL, 0); 631 no = fdt_path_offset(fdtp, "/chosen"); 632 if (no < 0) 633 return; 634 635 prop = fdt_get_property(fdtp, no, "stdout", &len); 636 637 /* If /chosen/stdout does not extist, create it */ 638 if (prop == NULL || (prop != NULL && len == 0)) { 639 640 bzero(tmp, 10 * sizeof(char)); 641 strcpy((char *)&tmp, "serial"); 642 if (strlen(ptr) > 3) 643 /* Serial number too long */ 644 return; 645 646 strncpy((char *)tmp + 6, ptr, 3); 647 sero = fdt_path_offset(fdtp, (const char *)tmp); 648 if (sero < 0) 649 /* 650 * If serial device we're trying to assign 651 * stdout to doesn't exist in DT -- return. 652 */ 653 return; 654 655 fdt_setprop(fdtp, no, "stdout", &tmp, 656 strlen((char *)&tmp) + 1); 657 fdt_setprop(fdtp, no, "stdin", &tmp, 658 strlen((char *)&tmp) + 1); 659 } 660} 661 662/* 663 * Locate the blob, fix it up and return its location. 664 */ 665static int 666fdt_fixup(void) 667{ 668 const char *env; 669 char *ethstr; 670 int chosen, eth_no, len; 671 struct sys_info *si; 672 673 env = NULL; 674 eth_no = 0; 675 ethstr = NULL; 676 len = 0; 677 678 if (fdtp == NULL && fdt_setup_fdtp() != 0) 679 return (0); 680 681 /* Create /chosen node (if not exists) */ 682 if ((chosen = fdt_subnode_offset(fdtp, 0, "chosen")) == 683 -FDT_ERR_NOTFOUND) 684 chosen = fdt_add_subnode(fdtp, 0, "chosen"); 685 686 /* Value assigned to fixup-applied does not matter. */ 687 if (fdt_getprop(fdtp, chosen, "fixup-applied", NULL)) 688 return (1); 689 690 /* Acquire sys_info */ 691 si = ub_get_sys_info(); 692 693 while ((env = ub_env_enum(env)) != NULL) { 694 if (strncmp(env, "eth", 3) == 0 && 695 strncmp(env + (strlen(env) - 4), "addr", 4) == 0) { 696 /* 697 * Handle Ethernet addrs: parse uboot env eth%daddr 698 */ 699 700 if (!eth_no) { 701 /* 702 * Check how many chars we will need to store 703 * maximal eth iface number. 704 */ 705 len = strlen(STRINGIFY(TMP_MAX_ETH)) + 706 strlen("ethernet"); 707 708 /* 709 * Reserve mem for string "ethernet" and len 710 * chars for iface no. 711 */ 712 ethstr = (char *)malloc(len * sizeof(char)); 713 bzero(ethstr, len * sizeof(char)); 714 strcpy(ethstr, "ethernet0"); 715 } 716 717 /* Modify blob */ 718 fixup_ethernet(env, ethstr, ð_no, len); 719 720 } else if (strcmp(env, "consoledev") == 0) 721 fixup_stdout(env); 722 } 723 724 /* Modify cpu(s) and bus clock frequenties in /cpus node [Hz] */ 725 fixup_cpubusfreqs(si->clk_cpu, si->clk_bus); 726 727 /* Fixup memory regions */ 728 fixup_memory(si); 729 730 fdt_setprop(fdtp, chosen, "fixup-applied", NULL, 0); 731 return (1); 732} 733 734/* 735 * Copy DTB blob to specified location and return size 736 */ 737int 738fdt_copy(vm_offset_t va) 739{ 740 int err; 741 742 if (fdtp == NULL) { 743 err = fdt_setup_fdtp(); 744 if (err) { 745 printf("No valid device tree blob found!\n"); 746 return (0); 747 } 748 } 749 750 if (fdt_fixup() == 0) 751 return (0); 752 753 if (fdtp_va != 0) { 754 /* Overwrite the FDT with the fixed version. */ 755 /* XXX Is this really appropriate? */ 756 COPYIN(fdtp, fdtp_va, fdtp_size); 757 } 758 COPYIN(fdtp, va, fdtp_size); 759 return (fdtp_size); 760} 761 762 763 764int 765command_fdt_internal(int argc, char *argv[]) 766{ 767 cmdf_t *cmdh; 768 int flags; 769 char *cmd; 770 int i, err; 771 772 if (argc < 2) { 773 command_errmsg = "usage is 'fdt <command> [<args>]"; 774 return (CMD_ERROR); 775 } 776 777 /* 778 * Validate fdt <command>. 779 */ 780 cmd = strdup(argv[1]); 781 i = 0; 782 cmdh = NULL; 783 while (!(commands[i].name == NULL)) { 784 if (strcmp(cmd, commands[i].name) == 0) { 785 /* found it */ 786 cmdh = commands[i].handler; 787 flags = commands[i].flags; 788 break; 789 } 790 i++; 791 } 792 if (cmdh == NULL) { 793 command_errmsg = "unknown command"; 794 return (CMD_ERROR); 795 } 796 797 if (flags & CMD_REQUIRES_BLOB) { 798 /* 799 * Check if uboot env vars were parsed already. If not, do it now. 800 */ 801 if (fdt_fixup() == 0) 802 return (CMD_ERROR); 803 } 804 805 /* 806 * Call command handler. 807 */ 808 err = (*cmdh)(argc, argv); 809 810 return (err); 811} 812 813static int 814fdt_cmd_addr(int argc, char *argv[]) 815{ 816 struct preloaded_file *fp; 817 struct fdt_header *hdr; 818 const char *addr; 819 char *cp; 820 821 fdt_to_load = NULL; 822 823 if (argc > 2) 824 addr = argv[2]; 825 else { 826 sprintf(command_errbuf, "no address specified"); 827 return (CMD_ERROR); 828 } 829 830 hdr = (struct fdt_header *)strtoul(addr, &cp, 16); 831 if (cp == addr) { 832 sprintf(command_errbuf, "Invalid address: %s", addr); 833 return (CMD_ERROR); 834 } 835 836 while ((fp = file_findfile(NULL, "dtb")) != NULL) { 837 file_discard(fp); 838 } 839 840 fdt_to_load = hdr; 841 return (CMD_OK); 842} 843 844static int 845fdt_cmd_cd(int argc, char *argv[]) 846{ 847 char *path; 848 char tmp[FDT_CWD_LEN]; 849 int len, o; 850 851 path = (argc > 2) ? argv[2] : "/"; 852 853 if (path[0] == '/') { 854 len = strlen(path); 855 if (len >= FDT_CWD_LEN) 856 goto fail; 857 } else { 858 /* Handle path specification relative to cwd */ 859 len = strlen(cwd) + strlen(path) + 1; 860 if (len >= FDT_CWD_LEN) 861 goto fail; 862 863 strcpy(tmp, cwd); 864 strcat(tmp, "/"); 865 strcat(tmp, path); 866 path = tmp; 867 } 868 869 o = fdt_path_offset(fdtp, path); 870 if (o < 0) { 871 sprintf(command_errbuf, "could not find node: '%s'", path); 872 return (CMD_ERROR); 873 } 874 875 strcpy(cwd, path); 876 return (CMD_OK); 877 878fail: 879 sprintf(command_errbuf, "path too long: %d, max allowed: %d", 880 len, FDT_CWD_LEN - 1); 881 return (CMD_ERROR); 882} 883 884static int 885fdt_cmd_hdr(int argc __unused, char *argv[] __unused) 886{ 887 char line[80]; 888 int ver; 889 890 if (fdtp == NULL) { 891 command_errmsg = "no device tree blob pointer?!"; 892 return (CMD_ERROR); 893 } 894 895 ver = fdt_version(fdtp); 896 pager_open(); 897 sprintf(line, "\nFlattened device tree header (%p):\n", fdtp); 898 pager_output(line); 899 sprintf(line, " magic = 0x%08x\n", fdt_magic(fdtp)); 900 pager_output(line); 901 sprintf(line, " size = %d\n", fdt_totalsize(fdtp)); 902 pager_output(line); 903 sprintf(line, " off_dt_struct = 0x%08x\n", 904 fdt_off_dt_struct(fdtp)); 905 pager_output(line); 906 sprintf(line, " off_dt_strings = 0x%08x\n", 907 fdt_off_dt_strings(fdtp)); 908 pager_output(line); 909 sprintf(line, " off_mem_rsvmap = 0x%08x\n", 910 fdt_off_mem_rsvmap(fdtp)); 911 pager_output(line); 912 sprintf(line, " version = %d\n", ver); 913 pager_output(line); 914 sprintf(line, " last compatible version = %d\n", 915 fdt_last_comp_version(fdtp)); 916 pager_output(line); 917 if (ver >= 2) { 918 sprintf(line, " boot_cpuid = %d\n", 919 fdt_boot_cpuid_phys(fdtp)); 920 pager_output(line); 921 } 922 if (ver >= 3) { 923 sprintf(line, " size_dt_strings = %d\n", 924 fdt_size_dt_strings(fdtp)); 925 pager_output(line); 926 } 927 if (ver >= 17) { 928 sprintf(line, " size_dt_struct = %d\n", 929 fdt_size_dt_struct(fdtp)); 930 pager_output(line); 931 } 932 pager_close(); 933 934 return (CMD_OK); 935} 936 937static int 938fdt_cmd_ls(int argc, char *argv[]) 939{ 940 const char *prevname[FDT_MAX_DEPTH] = { NULL }; 941 const char *name; 942 char *path; 943 int i, o, depth, len; 944 945 path = (argc > 2) ? argv[2] : NULL; 946 if (path == NULL) 947 path = cwd; 948 949 o = fdt_path_offset(fdtp, path); 950 if (o < 0) { 951 sprintf(command_errbuf, "could not find node: '%s'", path); 952 return (CMD_ERROR); 953 } 954 955 for (depth = 0; 956 (o >= 0) && (depth >= 0); 957 o = fdt_next_node(fdtp, o, &depth)) { 958 959 name = fdt_get_name(fdtp, o, &len); 960 961 if (depth > FDT_MAX_DEPTH) { 962 printf("max depth exceeded: %d\n", depth); 963 continue; 964 } 965 966 prevname[depth] = name; 967 968 /* Skip root (i = 1) when printing devices */ 969 for (i = 1; i <= depth; i++) { 970 if (prevname[i] == NULL) 971 break; 972 973 if (strcmp(cwd, "/") == 0) 974 printf("/"); 975 printf("%s", prevname[i]); 976 } 977 printf("\n"); 978 } 979 980 return (CMD_OK); 981} 982 983static __inline int 984isprint(int c) 985{ 986 987 return (c >= ' ' && c <= 0x7e); 988} 989 990static int 991fdt_isprint(const void *data, int len, int *count) 992{ 993 const char *d; 994 char ch; 995 int yesno, i; 996 997 if (len == 0) 998 return (0); 999 1000 d = (const char *)data; 1001 if (d[len - 1] != '\0') 1002 return (0); 1003 1004 *count = 0; 1005 yesno = 1; 1006 for (i = 0; i < len; i++) { 1007 ch = *(d + i); 1008 if (isprint(ch) || (ch == '\0' && i > 0)) { 1009 /* Count strings */ 1010 if (ch == '\0') 1011 (*count)++; 1012 continue; 1013 } 1014 1015 yesno = 0; 1016 break; 1017 } 1018 1019 return (yesno); 1020} 1021 1022static int 1023fdt_data_str(const void *data, int len, int count, char **buf) 1024{ 1025 char *b, *tmp; 1026 const char *d; 1027 int buf_len, i, l; 1028 1029 /* 1030 * Calculate the length for the string and allocate memory. 1031 * 1032 * Note that 'len' already includes at least one terminator. 1033 */ 1034 buf_len = len; 1035 if (count > 1) { 1036 /* 1037 * Each token had already a terminator buried in 'len', but we 1038 * only need one eventually, don't count space for these. 1039 */ 1040 buf_len -= count - 1; 1041 1042 /* Each consecutive token requires a ", " separator. */ 1043 buf_len += count * 2; 1044 } 1045 1046 /* Add some space for surrounding double quotes. */ 1047 buf_len += count * 2; 1048 1049 /* Note that string being put in 'tmp' may be as big as 'buf_len'. */ 1050 b = (char *)malloc(buf_len); 1051 tmp = (char *)malloc(buf_len); 1052 if (b == NULL) 1053 goto error; 1054 1055 if (tmp == NULL) { 1056 free(b); 1057 goto error; 1058 } 1059 1060 b[0] = '\0'; 1061 1062 /* 1063 * Now that we have space, format the string. 1064 */ 1065 i = 0; 1066 do { 1067 d = (const char *)data + i; 1068 l = strlen(d) + 1; 1069 1070 sprintf(tmp, "\"%s\"%s", d, 1071 (i + l) < len ? ", " : ""); 1072 strcat(b, tmp); 1073 1074 i += l; 1075 1076 } while (i < len); 1077 *buf = b; 1078 1079 free(tmp); 1080 1081 return (0); 1082error: 1083 return (1); 1084} 1085 1086static int 1087fdt_data_cell(const void *data, int len, char **buf) 1088{ 1089 char *b, *tmp; 1090 const uint32_t *c; 1091 int count, i, l; 1092 1093 /* Number of cells */ 1094 count = len / 4; 1095 1096 /* 1097 * Calculate the length for the string and allocate memory. 1098 */ 1099 1100 /* Each byte translates to 2 output characters */ 1101 l = len * 2; 1102 if (count > 1) { 1103 /* Each consecutive cell requires a " " separator. */ 1104 l += (count - 1) * 1; 1105 } 1106 /* Each cell will have a "0x" prefix */ 1107 l += count * 2; 1108 /* Space for surrounding <> and terminator */ 1109 l += 3; 1110 1111 b = (char *)malloc(l); 1112 tmp = (char *)malloc(l); 1113 if (b == NULL) 1114 goto error; 1115 1116 if (tmp == NULL) { 1117 free(b); 1118 goto error; 1119 } 1120 1121 b[0] = '\0'; 1122 strcat(b, "<"); 1123 1124 for (i = 0; i < len; i += 4) { 1125 c = (const uint32_t *)((const uint8_t *)data + i); 1126 sprintf(tmp, "0x%08x%s", fdt32_to_cpu(*c), 1127 i < (len - 4) ? " " : ""); 1128 strcat(b, tmp); 1129 } 1130 strcat(b, ">"); 1131 *buf = b; 1132 1133 free(tmp); 1134 1135 return (0); 1136error: 1137 return (1); 1138} 1139 1140static int 1141fdt_data_bytes(const void *data, int len, char **buf) 1142{ 1143 char *b, *tmp; 1144 const char *d; 1145 int i, l; 1146 1147 /* 1148 * Calculate the length for the string and allocate memory. 1149 */ 1150 1151 /* Each byte translates to 2 output characters */ 1152 l = len * 2; 1153 if (len > 1) 1154 /* Each consecutive byte requires a " " separator. */ 1155 l += (len - 1) * 1; 1156 /* Each byte will have a "0x" prefix */ 1157 l += len * 2; 1158 /* Space for surrounding [] and terminator. */ 1159 l += 3; 1160 1161 b = (char *)malloc(l); 1162 tmp = (char *)malloc(l); 1163 if (b == NULL) 1164 goto error; 1165 1166 if (tmp == NULL) { 1167 free(b); 1168 goto error; 1169 } 1170 1171 b[0] = '\0'; 1172 strcat(b, "["); 1173 1174 for (i = 0, d = data; i < len; i++) { 1175 sprintf(tmp, "0x%02x%s", d[i], i < len - 1 ? " " : ""); 1176 strcat(b, tmp); 1177 } 1178 strcat(b, "]"); 1179 *buf = b; 1180 1181 free(tmp); 1182 1183 return (0); 1184error: 1185 return (1); 1186} 1187 1188static int 1189fdt_data_fmt(const void *data, int len, char **buf) 1190{ 1191 int count; 1192 1193 if (len == 0) { 1194 *buf = NULL; 1195 return (1); 1196 } 1197 1198 if (fdt_isprint(data, len, &count)) 1199 return (fdt_data_str(data, len, count, buf)); 1200 1201 else if ((len % 4) == 0) 1202 return (fdt_data_cell(data, len, buf)); 1203 1204 else 1205 return (fdt_data_bytes(data, len, buf)); 1206} 1207 1208static int 1209fdt_prop(int offset) 1210{ 1211 char *line, *buf; 1212 const struct fdt_property *prop; 1213 const char *name; 1214 const void *data; 1215 int len, rv; 1216 1217 line = NULL; 1218 prop = fdt_offset_ptr(fdtp, offset, sizeof(*prop)); 1219 if (prop == NULL) 1220 return (1); 1221 1222 name = fdt_string(fdtp, fdt32_to_cpu(prop->nameoff)); 1223 len = fdt32_to_cpu(prop->len); 1224 1225 rv = 0; 1226 buf = NULL; 1227 if (len == 0) { 1228 /* Property without value */ 1229 line = (char *)malloc(strlen(name) + 2); 1230 if (line == NULL) { 1231 rv = 2; 1232 goto out2; 1233 } 1234 sprintf(line, "%s\n", name); 1235 goto out1; 1236 } 1237 1238 /* 1239 * Process property with value 1240 */ 1241 data = prop->data; 1242 1243 if (fdt_data_fmt(data, len, &buf) != 0) { 1244 rv = 3; 1245 goto out2; 1246 } 1247 1248 line = (char *)malloc(strlen(name) + strlen(FDT_PROP_SEP) + 1249 strlen(buf) + 2); 1250 if (line == NULL) { 1251 sprintf(command_errbuf, "could not allocate space for string"); 1252 rv = 4; 1253 goto out2; 1254 } 1255 1256 sprintf(line, "%s" FDT_PROP_SEP "%s\n", name, buf); 1257 1258out1: 1259 pager_open(); 1260 pager_output(line); 1261 pager_close(); 1262 1263out2: 1264 if (buf) 1265 free(buf); 1266 1267 if (line) 1268 free(line); 1269 1270 return (rv); 1271} 1272 1273static int 1274fdt_modprop(int nodeoff, char *propname, void *value, char mode) 1275{ 1276 uint32_t cells[100]; 1277 char *buf; 1278 int len, rv; 1279 const struct fdt_property *p; 1280 1281 p = fdt_get_property(fdtp, nodeoff, propname, NULL); 1282 1283 if (p != NULL) { 1284 if (mode == 1) { 1285 /* Adding inexistant value in mode 1 is forbidden */ 1286 sprintf(command_errbuf, "property already exists!"); 1287 return (CMD_ERROR); 1288 } 1289 } else if (mode == 0) { 1290 sprintf(command_errbuf, "property does not exist!"); 1291 return (CMD_ERROR); 1292 } 1293 len = strlen(value); 1294 rv = 0; 1295 buf = (char *)value; 1296 1297 switch (*buf) { 1298 case '&': 1299 /* phandles */ 1300 break; 1301 case '<': 1302 /* Data cells */ 1303 len = fdt_strtovect(buf, (void *)&cells, 100, 1304 sizeof(uint32_t)); 1305 1306 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1307 len * sizeof(uint32_t)); 1308 break; 1309 case '[': 1310 /* Data bytes */ 1311 len = fdt_strtovect(buf, (void *)&cells, 100, 1312 sizeof(uint8_t)); 1313 1314 rv = fdt_setprop(fdtp, nodeoff, propname, &cells, 1315 len * sizeof(uint8_t)); 1316 break; 1317 case '"': 1318 default: 1319 /* Default -- string */ 1320 rv = fdt_setprop_string(fdtp, nodeoff, propname, value); 1321 break; 1322 } 1323 1324 if (rv != 0) { 1325 if (rv == -FDT_ERR_NOSPACE) 1326 sprintf(command_errbuf, 1327 "Device tree blob is too small!\n"); 1328 else 1329 sprintf(command_errbuf, 1330 "Could not add/modify property!\n"); 1331 } 1332 return (rv); 1333} 1334 1335/* Merge strings from argv into a single string */ 1336static int 1337fdt_merge_strings(int argc, char *argv[], int start, char **buffer) 1338{ 1339 char *buf; 1340 int i, idx, sz; 1341 1342 *buffer = NULL; 1343 sz = 0; 1344 1345 for (i = start; i < argc; i++) 1346 sz += strlen(argv[i]); 1347 1348 /* Additional bytes for whitespaces between args */ 1349 sz += argc - start; 1350 1351 buf = (char *)malloc(sizeof(char) * sz); 1352 bzero(buf, sizeof(char) * sz); 1353 1354 if (buf == NULL) { 1355 sprintf(command_errbuf, "could not allocate space " 1356 "for string"); 1357 return (1); 1358 } 1359 1360 idx = 0; 1361 for (i = start, idx = 0; i < argc; i++) { 1362 strcpy(buf + idx, argv[i]); 1363 idx += strlen(argv[i]); 1364 buf[idx] = ' '; 1365 idx++; 1366 } 1367 buf[sz - 1] = '\0'; 1368 *buffer = buf; 1369 return (0); 1370} 1371 1372/* Extract offset and name of node/property from a given path */ 1373static int 1374fdt_extract_nameloc(char **pathp, char **namep, int *nodeoff) 1375{ 1376 int o; 1377 char *path = *pathp, *name = NULL, *subpath = NULL; 1378 1379 subpath = strrchr(path, '/'); 1380 if (subpath == NULL) { 1381 o = fdt_path_offset(fdtp, cwd); 1382 name = path; 1383 path = (char *)&cwd; 1384 } else { 1385 *subpath = '\0'; 1386 if (strlen(path) == 0) 1387 path = cwd; 1388 1389 name = subpath + 1; 1390 o = fdt_path_offset(fdtp, path); 1391 } 1392 1393 if (strlen(name) == 0) { 1394 sprintf(command_errbuf, "name not specified"); 1395 return (1); 1396 } 1397 if (o < 0) { 1398 sprintf(command_errbuf, "could not find node: '%s'", path); 1399 return (1); 1400 } 1401 *namep = name; 1402 *nodeoff = o; 1403 *pathp = path; 1404 return (0); 1405} 1406 1407static int 1408fdt_cmd_prop(int argc, char *argv[]) 1409{ 1410 char *path, *propname, *value; 1411 int o, next, depth, rv; 1412 uint32_t tag; 1413 1414 path = (argc > 2) ? argv[2] : NULL; 1415 1416 value = NULL; 1417 1418 if (argc > 3) { 1419 /* Merge property value strings into one */ 1420 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1421 return (CMD_ERROR); 1422 } else 1423 value = NULL; 1424 1425 if (path == NULL) 1426 path = cwd; 1427 1428 rv = CMD_OK; 1429 1430 if (value) { 1431 /* If value is specified -- try to modify prop. */ 1432 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1433 return (CMD_ERROR); 1434 1435 rv = fdt_modprop(o, propname, value, 0); 1436 if (rv) 1437 return (CMD_ERROR); 1438 return (CMD_OK); 1439 1440 } 1441 /* User wants to display properties */ 1442 o = fdt_path_offset(fdtp, path); 1443 1444 if (o < 0) { 1445 sprintf(command_errbuf, "could not find node: '%s'", path); 1446 rv = CMD_ERROR; 1447 goto out; 1448 } 1449 1450 depth = 0; 1451 while (depth >= 0) { 1452 tag = fdt_next_tag(fdtp, o, &next); 1453 switch (tag) { 1454 case FDT_NOP: 1455 break; 1456 case FDT_PROP: 1457 if (depth > 1) 1458 /* Don't process properties of nested nodes */ 1459 break; 1460 1461 if (fdt_prop(o) != 0) { 1462 sprintf(command_errbuf, "could not process " 1463 "property"); 1464 rv = CMD_ERROR; 1465 goto out; 1466 } 1467 break; 1468 case FDT_BEGIN_NODE: 1469 depth++; 1470 if (depth > FDT_MAX_DEPTH) { 1471 printf("warning: nesting too deep: %d\n", 1472 depth); 1473 goto out; 1474 } 1475 break; 1476 case FDT_END_NODE: 1477 depth--; 1478 if (depth == 0) 1479 /* 1480 * This is the end of our starting node, force 1481 * the loop finish. 1482 */ 1483 depth--; 1484 break; 1485 } 1486 o = next; 1487 } 1488out: 1489 return (rv); 1490} 1491 1492static int 1493fdt_cmd_mkprop(int argc, char *argv[]) 1494{ 1495 int o; 1496 char *path, *propname, *value; 1497 1498 path = (argc > 2) ? argv[2] : NULL; 1499 1500 value = NULL; 1501 1502 if (argc > 3) { 1503 /* Merge property value strings into one */ 1504 if (fdt_merge_strings(argc, argv, 3, &value) != 0) 1505 return (CMD_ERROR); 1506 } else 1507 value = NULL; 1508 1509 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1510 return (CMD_ERROR); 1511 1512 if (fdt_modprop(o, propname, value, 1)) 1513 return (CMD_ERROR); 1514 1515 return (CMD_OK); 1516} 1517 1518static int 1519fdt_cmd_rm(int argc, char *argv[]) 1520{ 1521 int o, rv; 1522 char *path = NULL, *propname; 1523 1524 if (argc > 2) 1525 path = argv[2]; 1526 else { 1527 sprintf(command_errbuf, "no node/property name specified"); 1528 return (CMD_ERROR); 1529 } 1530 1531 o = fdt_path_offset(fdtp, path); 1532 if (o < 0) { 1533 /* If node not found -- try to find & delete property */ 1534 if (fdt_extract_nameloc(&path, &propname, &o) != 0) 1535 return (CMD_ERROR); 1536 1537 if ((rv = fdt_delprop(fdtp, o, propname)) != 0) { 1538 sprintf(command_errbuf, "could not delete" 1539 "%s\n", (rv == -FDT_ERR_NOTFOUND) ? 1540 "(property/node does not exist)" : ""); 1541 return (CMD_ERROR); 1542 1543 } else 1544 return (CMD_OK); 1545 } 1546 /* If node exists -- remove node */ 1547 rv = fdt_del_node(fdtp, o); 1548 if (rv) { 1549 sprintf(command_errbuf, "could not delete node"); 1550 return (CMD_ERROR); 1551 } 1552 return (CMD_OK); 1553} 1554 1555static int 1556fdt_cmd_mknode(int argc, char *argv[]) 1557{ 1558 int o, rv; 1559 char *path = NULL, *nodename = NULL; 1560 1561 if (argc > 2) 1562 path = argv[2]; 1563 else { 1564 sprintf(command_errbuf, "no node name specified"); 1565 return (CMD_ERROR); 1566 } 1567 1568 if (fdt_extract_nameloc(&path, &nodename, &o) != 0) 1569 return (CMD_ERROR); 1570 1571 rv = fdt_add_subnode(fdtp, o, nodename); 1572 1573 if (rv < 0) { 1574 if (rv == -FDT_ERR_NOSPACE) 1575 sprintf(command_errbuf, 1576 "Device tree blob is too small!\n"); 1577 else 1578 sprintf(command_errbuf, 1579 "Could not add node!\n"); 1580 return (CMD_ERROR); 1581 } 1582 return (CMD_OK); 1583} 1584 1585static int 1586fdt_cmd_pwd(int argc, char *argv[]) 1587{ 1588 char line[FDT_CWD_LEN]; 1589 1590 pager_open(); 1591 sprintf(line, "%s\n", cwd); 1592 pager_output(line); 1593 pager_close(); 1594 return (CMD_OK); 1595} 1596 1597static int 1598fdt_cmd_mres(int argc, char *argv[]) 1599{ 1600 uint64_t start, size; 1601 int i, total; 1602 char line[80]; 1603 1604 pager_open(); 1605 total = fdt_num_mem_rsv(fdtp); 1606 if (total > 0) { 1607 pager_output("Reserved memory regions:\n"); 1608 for (i = 0; i < total; i++) { 1609 fdt_get_mem_rsv(fdtp, i, &start, &size); 1610 sprintf(line, "reg#%d: (start: 0x%jx, size: 0x%jx)\n", 1611 i, start, size); 1612 pager_output(line); 1613 } 1614 } else 1615 pager_output("No reserved memory regions\n"); 1616 pager_close(); 1617 1618 return (CMD_OK); 1619} 1620 1621static int 1622fdt_cmd_nyi(int argc, char *argv[]) 1623{ 1624 1625 printf("command not yet implemented\n"); 1626 return (CMD_ERROR); 1627} 1628