cmd/fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2007
   4  * Gerald Van Baren, Custom IDEAS, [email protected]
   5  * Based on code written by:
   6  *   Pantelis Antoniou <[email protected]> and
   7  *   Matthew McClintock <[email protected]>
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <linux/ctype.h>
  15 #include <linux/types.h>
  16 #include <asm/global_data.h>
  17 #include <linux/libfdt.h>
  18 #include <fdt_support.h>
  19 #include <mapmem.h>
  20 #include <asm/io.h>
  21
  22 #define MAX_LEVEL       32              /* how deeply nested we will go */
  23 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  31 static int fdt_print(const char *pathp, char *prop, int depth);
  32 static int is_printable_string(const void *data, int len);
  33
  34 /*
  35  * The working_fdt points to our working flattened device tree.
  36  */
  37 struct fdt_header *working_fdt;
  38
  39 void set_working_fdt_addr(ulong addr)
  40 {
  41         void *buf;
  42
  43         printf("Working FDT set to %lx\n", addr);
  44         buf = map_sysmem(addr, 0);
  45         working_fdt = buf;
  46         env_set_hex("fdtaddr", addr);
  47 }
  48
  49 /*
  50  * Get a value from the fdt and format it to be set in the environment
  51  */
  52 static int fdt_value_env_set(const void *nodep, int len,
  53                              const char *var, int index)
  54 {
  55         if (is_printable_string(nodep, len)) {
  56                 const char *nodec = (const char *)nodep;
  57                 int i;
  58
  59                 /*
  60                  * Iterate over all members in stringlist and find the one at
  61                  * offset $index. If no such index exists, indicate failure.
  62                  */
  63                 for (i = 0; i < len; ) {
  64                         if (index-- > 0) {
  65                                 i += strlen(nodec) + 1;
  66                                 nodec += strlen(nodec) + 1;
  67                                 continue;
  68                         }
  69
  70                         env_set(var, nodec);
  71                         return 0;
  72                 }
  73
  74                 return 1;
  75         } else if (len == 4) {
  76                 char buf[11];
  77
  78                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  79                 env_set(var, buf);
  80         } else if (len%4 == 0 && len <= 20) {
  81                 /* Needed to print things like sha1 hashes. */
  82                 char buf[41];
  83                 int i;
  84
  85                 for (i = 0; i < len; i += sizeof(unsigned int))
  86                         sprintf(buf + (i * 2), "%08x",
  87                                 *(unsigned int *)(nodep + i));
  88                 env_set(var, buf);
  89         } else {
  90                 printf("error: unprintable value\n");
  91                 return 1;
  92         }
  93         return 0;
  94 }
  95
  96 static const char * const fdt_member_table[] = {
  97         "magic",
  98         "totalsize",
  99         "off_dt_struct",
 100         "off_dt_strings",
 101         "off_mem_rsvmap",
 102         "version",
 103         "last_comp_version",
 104         "boot_cpuid_phys",
 105         "size_dt_strings",
 106         "size_dt_struct",
 107 };
 108
 109 static int fdt_get_header_value(int argc, char *const argv[])
 110 {
 111         fdt32_t *fdtp = (fdt32_t *)working_fdt;
 112         ulong val;
 113         int i;
 114
 115         if (argv[2][0] != 'g')
 116                 return CMD_RET_FAILURE;
 117
 118         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 119                 if (strcmp(fdt_member_table[i], argv[4]))
 120                         continue;
 121
 122                 val = fdt32_to_cpu(fdtp[i]);
 123                 env_set_hex(argv[3], val);
 124                 return CMD_RET_SUCCESS;
 125         }
 126
 127         return CMD_RET_FAILURE;
 128 }
 129
 130 /*
 131  * Flattened Device Tree command, see the help for parameter definitions.
 132  */
 133 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 134 {
 135         if (argc < 2)
 136                 return CMD_RET_USAGE;
 137
 138         /* fdt addr: Set the address of the fdt */
 139         if (strncmp(argv[1], "ad", 2) == 0) {
 140                 unsigned long addr;
 141                 int control = 0;
 142                 int quiet = 0;
 143                 struct fdt_header *blob;
 144
 145                 /* Set the address [and length] of the fdt */
 146                 argc -= 2;
 147                 argv += 2;
 148                 while (argc > 0 && **argv == '-') {
 149                         char *arg = *argv;
 150
 151                         while (*++arg) {
 152                                 switch (*arg) {
 153                                 case 'c':
 154                                         control = 1;
 155                                         break;
 156                                 case 'q':
 157                                         quiet = 1;
 158                                         break;
 159                                 default:
 160                                         return CMD_RET_USAGE;
 161                                 }
 162                         }
 163                         argc--;
 164                         argv++;
 165                 }
 166                 if (argc == 0) {
 167                         if (control)
 168                                 blob = (struct fdt_header *)gd->fdt_blob;
 169                         else
 170                                 blob = working_fdt;
 171                         if (!blob || !fdt_valid(&blob))
 172                                 return 1;
 173                         printf("%s fdt: %08lx\n",
 174                                control ? "Control" : "Working",
 175                                control ? (ulong)map_to_sysmem(blob) :
 176                                env_get_hex("fdtaddr", 0));
 177                         return 0;
 178                 }
 179
 180                 addr = hextoul(argv[0], NULL);
 181                 blob = map_sysmem(addr, 0);
 182                 if ((quiet && fdt_check_header(blob)) ||
 183                     (!quiet && !fdt_valid(&blob)))
 184                         return 1;
 185                 if (control)
 186                         gd->fdt_blob = blob;
 187                 else
 188                         set_working_fdt_addr(addr);
 189
 190                 if (argc >= 2) {
 191                         int  len;
 192                         int  err;
 193
 194                         /* Optional new length */
 195                         len = hextoul(argv[1], NULL);
 196                         if (len < fdt_totalsize(blob)) {
 197                                 if (!quiet)
 198                                         printf("New length %d < existing length %d, ignoring\n",
 199                                                len, fdt_totalsize(blob));
 200                         } else {
 201                                 /* Open in place with a new length */
 202                                 err = fdt_open_into(blob, blob, len);
 203                                 if (!quiet && err != 0) {
 204                                         printf("libfdt fdt_open_into(): %s\n",
 205                                                fdt_strerror(err));
 206                                 }
 207                         }
 208                 }
 209
 210                 return CMD_RET_SUCCESS;
 211
 212         /*
 213          * Move the working_fdt
 214          */
 215         } else if (strncmp(argv[1], "mo", 2) == 0) {
 216                 struct fdt_header *newaddr;
 217                 int  len;
 218                 int  err;
 219
 220                 if (argc < 4)
 221                         return CMD_RET_USAGE;
 222
 223                 /*
 224                  * Set the address and length of the fdt.
 225                  */
 226                 working_fdt = map_sysmem(hextoul(argv[2], NULL), 0);
 227                 if (!fdt_valid(&working_fdt))
 228                         return 1;
 229
 230                 newaddr = map_sysmem(hextoul(argv[3], NULL), 0);
 231
 232                 /*
 233                  * If the user specifies a length, use that.  Otherwise use the
 234                  * current length.
 235                  */
 236                 if (argc <= 4) {
 237                         len = fdt_totalsize(working_fdt);
 238                 } else {
 239                         len = hextoul(argv[4], NULL);
 240                         if (len < fdt_totalsize(working_fdt)) {
 241                                 printf ("New length 0x%X < existing length "
 242                                         "0x%X, aborting.\n",
 243                                         len, fdt_totalsize(working_fdt));
 244                                 return 1;
 245                         }
 246                 }
 247
 248                 /*
 249                  * Copy to the new location.
 250                  */
 251                 err = fdt_open_into(working_fdt, newaddr, len);
 252                 if (err != 0) {
 253                         printf ("libfdt fdt_open_into(): %s\n",
 254                                 fdt_strerror(err));
 255                         return 1;
 256                 }
 257                 set_working_fdt_addr(map_to_sysmem(newaddr));
 258
 259                 return CMD_RET_SUCCESS;
 260         }
 261
 262         if (!working_fdt) {
 263                 puts("No FDT memory address configured. Please configure\n"
 264                      "the FDT address via \"fdt addr <address>\" command.\n"
 265                      "Aborting!\n");
 266                 return CMD_RET_FAILURE;
 267         }
 268
 269 #ifdef CONFIG_OF_SYSTEM_SETUP
 270         /* Call the board-specific fixup routine */
 271         if (strncmp(argv[1], "sys", 3) == 0) {
 272                 int err = ft_system_setup(working_fdt, gd->bd);
 273
 274                 if (err) {
 275                         printf("Failed to add system information to FDT: %s\n",
 276                                fdt_strerror(err));
 277                         return CMD_RET_FAILURE;
 278                 }
 279
 280                 return CMD_RET_SUCCESS;
 281         }
 282 #endif
 283         /*
 284          * Make a new node
 285          */
 286         if (strncmp(argv[1], "mk", 2) == 0) {
 287                 char *pathp;            /* path */
 288                 char *nodep;            /* new node to add */
 289                 int  nodeoffset;        /* node offset from libfdt */
 290                 int  err;
 291
 292                 /*
 293                  * Parameters: Node path, new node to be appended to the path.
 294                  */
 295                 if (argc < 4)
 296                         return CMD_RET_USAGE;
 297
 298                 pathp = argv[2];
 299                 nodep = argv[3];
 300
 301                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 302                 if (nodeoffset < 0) {
 303                         /*
 304                          * Not found or something else bad happened.
 305                          */
 306                         printf ("libfdt fdt_path_offset() returned %s\n",
 307                                 fdt_strerror(nodeoffset));
 308                         return 1;
 309                 }
 310                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 311                 if (err < 0) {
 312                         printf ("libfdt fdt_add_subnode(): %s\n",
 313                                 fdt_strerror(err));
 314                         return 1;
 315                 }
 316
 317         /*
 318          * Set the value of a property in the working_fdt.
 319          */
 320         } else if (strncmp(argv[1], "se", 2) == 0) {
 321                 char *pathp;            /* path */
 322                 char *prop;             /* property */
 323                 int  nodeoffset;        /* node offset from libfdt */
 324                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 325                 const void *ptmp;
 326                 int  len;               /* new length of the property */
 327                 int  ret;               /* return value */
 328
 329                 /*
 330                  * Parameters: Node path, property, optional value.
 331                  */
 332                 if (argc < 4)
 333                         return CMD_RET_USAGE;
 334
 335                 pathp  = argv[2];
 336                 prop   = argv[3];
 337
 338                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 339                 if (nodeoffset < 0) {
 340                         /*
 341                          * Not found or something else bad happened.
 342                          */
 343                         printf ("libfdt fdt_path_offset() returned %s\n",
 344                                 fdt_strerror(nodeoffset));
 345                         return 1;
 346                 }
 347
 348                 if (argc == 4) {
 349                         len = 0;
 350                 } else {
 351                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 352                         if (len > SCRATCHPAD) {
 353                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 354                                        len);
 355                                 return 1;
 356                         }
 357                         if (ptmp != NULL)
 358                                 memcpy(data, ptmp, len);
 359
 360                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 361                         if (ret != 0)
 362                                 return ret;
 363                 }
 364
 365                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 366                 if (ret < 0) {
 367                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 368                         return 1;
 369                 }
 370
 371         /********************************************************************
 372          * Get the value of a property in the working_fdt.
 373          ********************************************************************/
 374         } else if (argv[1][0] == 'g') {
 375                 char *subcmd;           /* sub-command */
 376                 char *pathp;            /* path */
 377                 char *prop;             /* property */
 378                 char *var;              /* variable to store result */
 379                 int  nodeoffset;        /* node offset from libfdt */
 380                 const void *nodep;      /* property node pointer */
 381                 int  len = 0;           /* new length of the property */
 382
 383                 /*
 384                  * Parameters: Node path, property, optional value.
 385                  */
 386                 if (argc < 5)
 387                         return CMD_RET_USAGE;
 388
 389                 subcmd = argv[2];
 390
 391                 if (argc < 6 && subcmd[0] != 's')
 392                         return CMD_RET_USAGE;
 393
 394                 var    = argv[3];
 395                 pathp  = argv[4];
 396                 prop   = argv[5];
 397
 398                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 399                 if (nodeoffset < 0) {
 400                         /*
 401                          * Not found or something else bad happened.
 402                          */
 403                         printf("libfdt fdt_path_offset() returned %s\n",
 404                                 fdt_strerror(nodeoffset));
 405                         return 1;
 406                 }
 407
 408                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 409                         int req_index = -1;
 410                         int startDepth = fdt_node_depth(
 411                                 working_fdt, nodeoffset);
 412                         int curDepth = startDepth;
 413                         int cur_index = -1;
 414                         int nextNodeOffset = fdt_next_node(
 415                                 working_fdt, nodeoffset, &curDepth);
 416
 417                         if (subcmd[0] == 'n')
 418                                 req_index = hextoul(argv[5], NULL);
 419
 420                         while (curDepth > startDepth) {
 421                                 if (curDepth == startDepth + 1)
 422                                         cur_index++;
 423                                 if (subcmd[0] == 'n' &&
 424                                     cur_index == req_index) {
 425                                         const char *node_name;
 426
 427                                         node_name = fdt_get_name(working_fdt,
 428                                                                  nextNodeOffset,
 429                                                                  NULL);
 430                                         env_set(var, node_name);
 431                                         return 0;
 432                                 }
 433                                 nextNodeOffset = fdt_next_node(
 434                                         working_fdt, nextNodeOffset, &curDepth);
 435                                 if (nextNodeOffset < 0)
 436                                         break;
 437                         }
 438                         if (subcmd[0] == 's') {
 439                                 /* get the num nodes at this level */
 440                                 env_set_ulong(var, cur_index + 1);
 441                         } else {
 442                                 /* node index not found */
 443                                 printf("libfdt node not found\n");
 444                                 return 1;
 445                         }
 446                 } else {
 447                         nodep = fdt_getprop(
 448                                 working_fdt, nodeoffset, prop, &len);
 449                         if (nodep && len >= 0) {
 450                                 if (subcmd[0] == 'v') {
 451                                         int index = 0;
 452                                         int ret;
 453
 454                                         if (len == 0) {
 455                                                 /* no property value */
 456                                                 env_set(var, "");
 457                                                 return 0;
 458                                         }
 459
 460                                         if (argc == 7)
 461                                                 index = simple_strtoul(argv[6], NULL, 10);
 462
 463                                         ret = fdt_value_env_set(nodep, len,
 464                                                                 var, index);
 465                                         if (ret != 0)
 466                                                 return ret;
 467                                 } else if (subcmd[0] == 'a') {
 468                                         /* Get address */
 469                                         char buf[11];
 470
 471                                         sprintf(buf, "0x%p", nodep);
 472                                         env_set(var, buf);
 473                                 } else if (subcmd[0] == 's') {
 474                                         /* Get size */
 475                                         char buf[11];
 476
 477                                         sprintf(buf, "0x%08X", len);
 478                                         env_set(var, buf);
 479                                 } else
 480                                         return CMD_RET_USAGE;
 481                                 return 0;
 482                         } else {
 483                                 printf("libfdt fdt_getprop(): %s\n",
 484                                         fdt_strerror(len));
 485                                 return 1;
 486                         }
 487                 }
 488
 489         /*
 490          * Print (recursive) / List (single level)
 491          */
 492         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 493                 int depth = MAX_LEVEL;  /* how deep to print */
 494                 char *pathp;            /* path */
 495                 char *prop;             /* property */
 496                 int  ret;               /* return value */
 497                 static char root[2] = "/";
 498
 499                 /*
 500                  * list is an alias for print, but limited to 1 level
 501                  */
 502                 if (argv[1][0] == 'l') {
 503                         depth = 1;
 504                 }
 505
 506                 /*
 507                  * Get the starting path.  The root node is an oddball,
 508                  * the offset is zero and has no name.
 509                  */
 510                 if (argc == 2)
 511                         pathp = root;
 512                 else
 513                         pathp = argv[2];
 514                 if (argc > 3)
 515                         prop = argv[3];
 516                 else
 517                         prop = NULL;
 518
 519                 ret = fdt_print(pathp, prop, depth);
 520                 if (ret != 0)
 521                         return ret;
 522
 523         /*
 524          * Remove a property/node
 525          */
 526         } else if (strncmp(argv[1], "rm", 2) == 0) {
 527                 int  nodeoffset;        /* node offset from libfdt */
 528                 int  err;
 529
 530                 /*
 531                  * Get the path.  The root node is an oddball, the offset
 532                  * is zero and has no name.
 533                  */
 534                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 535                 if (nodeoffset < 0) {
 536                         /*
 537                          * Not found or something else bad happened.
 538                          */
 539                         printf ("libfdt fdt_path_offset() returned %s\n",
 540                                 fdt_strerror(nodeoffset));
 541                         return 1;
 542                 }
 543                 /*
 544                  * Do the delete.  A fourth parameter means delete a property,
 545                  * otherwise delete the node.
 546                  */
 547                 if (argc > 3) {
 548                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 549                         if (err < 0) {
 550                                 printf("libfdt fdt_delprop():  %s\n",
 551                                         fdt_strerror(err));
 552                                 return err;
 553                         }
 554                 } else {
 555                         err = fdt_del_node(working_fdt, nodeoffset);
 556                         if (err < 0) {
 557                                 printf("libfdt fdt_del_node():  %s\n",
 558                                         fdt_strerror(err));
 559                                 return err;
 560                         }
 561                 }
 562
 563         /*
 564          * Display header info
 565          */
 566         } else if (argv[1][0] == 'h') {
 567                 if (argc == 5)
 568                         return fdt_get_header_value(argc, argv);
 569
 570                 u32 version = fdt_version(working_fdt);
 571                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 572                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 573                        fdt_totalsize(working_fdt));
 574                 printf("off_dt_struct:\t\t0x%x\n",
 575                        fdt_off_dt_struct(working_fdt));
 576                 printf("off_dt_strings:\t\t0x%x\n",
 577                        fdt_off_dt_strings(working_fdt));
 578                 printf("off_mem_rsvmap:\t\t0x%x\n",
 579                        fdt_off_mem_rsvmap(working_fdt));
 580                 printf("version:\t\t%d\n", version);
 581                 printf("last_comp_version:\t%d\n",
 582                        fdt_last_comp_version(working_fdt));
 583                 if (version >= 2)
 584                         printf("boot_cpuid_phys:\t0x%x\n",
 585                                 fdt_boot_cpuid_phys(working_fdt));
 586                 if (version >= 3)
 587                         printf("size_dt_strings:\t0x%x\n",
 588                                 fdt_size_dt_strings(working_fdt));
 589                 if (version >= 17)
 590                         printf("size_dt_struct:\t\t0x%x\n",
 591                                 fdt_size_dt_struct(working_fdt));
 592                 printf("number mem_rsv:\t\t0x%x\n",
 593                        fdt_num_mem_rsv(working_fdt));
 594                 printf("\n");
 595
 596         /*
 597          * Set boot cpu id
 598          */
 599         } else if (strncmp(argv[1], "boo", 3) == 0) {
 600                 unsigned long tmp = hextoul(argv[2], NULL);
 601                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 602
 603         /*
 604          * memory command
 605          */
 606         } else if (strncmp(argv[1], "me", 2) == 0) {
 607                 uint64_t addr, size;
 608                 int err;
 609                 addr = simple_strtoull(argv[2], NULL, 16);
 610                 size = simple_strtoull(argv[3], NULL, 16);
 611                 err = fdt_fixup_memory(working_fdt, addr, size);
 612                 if (err < 0)
 613                         return err;
 614
 615         /*
 616          * mem reserve commands
 617          */
 618         } else if (strncmp(argv[1], "rs", 2) == 0) {
 619                 if (argv[2][0] == 'p') {
 620                         uint64_t addr, size;
 621                         int total = fdt_num_mem_rsv(working_fdt);
 622                         int j, err;
 623                         printf("index\t\t   start\t\t    size\n");
 624                         printf("-------------------------------"
 625                                 "-----------------\n");
 626                         for (j = 0; j < total; j++) {
 627                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 628                                 if (err < 0) {
 629                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 630                                                         fdt_strerror(err));
 631                                         return err;
 632                                 }
 633                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 634                                         (u32)(addr >> 32),
 635                                         (u32)(addr & 0xffffffff),
 636                                         (u32)(size >> 32),
 637                                         (u32)(size & 0xffffffff));
 638                         }
 639                 } else if (argv[2][0] == 'a') {
 640                         uint64_t addr, size;
 641                         int err;
 642                         addr = simple_strtoull(argv[3], NULL, 16);
 643                         size = simple_strtoull(argv[4], NULL, 16);
 644                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 645
 646                         if (err < 0) {
 647                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 648                                         fdt_strerror(err));
 649                                 return err;
 650                         }
 651                 } else if (argv[2][0] == 'd') {
 652                         unsigned long idx = hextoul(argv[3], NULL);
 653                         int err = fdt_del_mem_rsv(working_fdt, idx);
 654
 655                         if (err < 0) {
 656                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 657                                         fdt_strerror(err));
 658                                 return err;
 659                         }
 660                 } else {
 661                         /* Unrecognized command */
 662                         return CMD_RET_USAGE;
 663                 }
 664         }
 665 #ifdef CONFIG_OF_BOARD_SETUP
 666         /* Call the board-specific fixup routine */
 667         else if (strncmp(argv[1], "boa", 3) == 0) {
 668                 int err = ft_board_setup(working_fdt, gd->bd);
 669
 670                 if (err) {
 671                         printf("Failed to update board information in FDT: %s\n",
 672                                fdt_strerror(err));
 673                         return CMD_RET_FAILURE;
 674                 }
 675 #ifdef CONFIG_ARCH_KEYSTONE
 676                 ft_board_setup_ex(working_fdt, gd->bd);
 677 #endif
 678         }
 679 #endif
 680         /* Create a chosen node */
 681         else if (strncmp(argv[1], "cho", 3) == 0) {
 682                 unsigned long initrd_start = 0, initrd_end = 0;
 683
 684                 if ((argc != 2) && (argc != 4))
 685                         return CMD_RET_USAGE;
 686
 687                 if (argc == 4) {
 688                         initrd_start = hextoul(argv[2], NULL);
 689                         initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
 690                 }
 691
 692                 fdt_chosen(working_fdt);
 693                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 694
 695 #if defined(CONFIG_FIT_SIGNATURE)
 696         } else if (strncmp(argv[1], "che", 3) == 0) {
 697                 int cfg_noffset;
 698                 int ret;
 699                 unsigned long addr;
 700                 struct fdt_header *blob;
 701
 702                 if (!working_fdt)
 703                         return CMD_RET_FAILURE;
 704
 705                 if (argc > 2) {
 706                         addr = hextoul(argv[2], NULL);
 707                         blob = map_sysmem(addr, 0);
 708                 } else {
 709                         blob = (struct fdt_header *)gd->fdt_blob;
 710                 }
 711                 if (!fdt_valid(&blob))
 712                         return 1;
 713
 714                 gd->fdt_blob = blob;
 715                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 716                 if (!cfg_noffset) {
 717                         printf("Could not find configuration node: %s\n",
 718                                fdt_strerror(cfg_noffset));
 719                         return CMD_RET_FAILURE;
 720                 }
 721
 722                 ret = fit_config_verify(working_fdt, cfg_noffset);
 723                 if (ret == 0)
 724                         return CMD_RET_SUCCESS;
 725                 else
 726                         return CMD_RET_FAILURE;
 727 #endif
 728
 729         }
 730 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 731         /* apply an overlay */
 732         else if (strncmp(argv[1], "ap", 2) == 0) {
 733                 unsigned long addr;
 734                 struct fdt_header *blob;
 735                 int ret;
 736
 737                 if (argc != 3)
 738                         return CMD_RET_USAGE;
 739
 740                 if (!working_fdt)
 741                         return CMD_RET_FAILURE;
 742
 743                 addr = hextoul(argv[2], NULL);
 744                 blob = map_sysmem(addr, 0);
 745                 if (!fdt_valid(&blob))
 746                         return CMD_RET_FAILURE;
 747
 748                 /* apply method prints messages on error */
 749                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 750                 if (ret)
 751                         return CMD_RET_FAILURE;
 752         }
 753 #endif
 754         /* resize the fdt */
 755         else if (strncmp(argv[1], "re", 2) == 0) {
 756                 uint extrasize;
 757                 if (argc > 2)
 758                         extrasize = hextoul(argv[2], NULL);
 759                 else
 760                         extrasize = 0;
 761                 fdt_shrink_to_minimum(working_fdt, extrasize);
 762         }
 763         else {
 764                 /* Unrecognized command */
 765                 return CMD_RET_USAGE;
 766         }
 767
 768         return 0;
 769 }
 770
 771 /****************************************************************************/
 772
 773 /*
 774  * Parse the user's input, partially heuristic.  Valid formats:
 775  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 776  *                      C conventions.
 777  * [00 11 22 .. nn] - byte stream
 778  * "string"     - If the the value doesn't start with "<" or "[", it is
 779  *                      treated as a string.  Note that the quotes are
 780  *                      stripped by the parser before we get the string.
 781  * newval: An array of strings containing the new property as specified
 782  *      on the command line
 783  * count: The number of strings in the array
 784  * data: A bytestream to be placed in the property
 785  * len: The length of the resulting bytestream
 786  */
 787 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 788 {
 789         char *cp;               /* temporary char pointer */
 790         char *newp;             /* temporary newval char pointer */
 791         unsigned long tmp;      /* holds converted values */
 792         int stridx = 0;
 793
 794         *len = 0;
 795         newp = newval[0];
 796
 797         /* An array of cells */
 798         if (*newp == '<') {
 799                 newp++;
 800                 while ((*newp != '>') && (stridx < count)) {
 801                         /*
 802                          * Keep searching until we find that last ">"
 803                          * That way users don't have to escape the spaces
 804                          */
 805                         if (*newp == '\0') {
 806                                 newp = newval[++stridx];
 807                                 continue;
 808                         }
 809
 810                         cp = newp;
 811                         tmp = simple_strtoul(cp, &newp, 0);
 812                         if (*cp != '?')
 813                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 814                         else
 815                                 newp++;
 816
 817                         data  += 4;
 818                         *len += 4;
 819
 820                         /* If the ptr didn't advance, something went wrong */
 821                         if ((newp - cp) <= 0) {
 822                                 printf("Sorry, I could not convert \"%s\"\n",
 823                                         cp);
 824                                 return 1;
 825                         }
 826
 827                         while (*newp == ' ')
 828                                 newp++;
 829                 }
 830
 831                 if (*newp != '>') {
 832                         printf("Unexpected character '%c'\n", *newp);
 833                         return 1;
 834                 }
 835         } else if (*newp == '[') {
 836                 /*
 837                  * Byte stream.  Convert the values.
 838                  */
 839                 newp++;
 840                 while ((stridx < count) && (*newp != ']')) {
 841                         while (*newp == ' ')
 842                                 newp++;
 843                         if (*newp == '\0') {
 844                                 newp = newval[++stridx];
 845                                 continue;
 846                         }
 847                         if (!isxdigit(*newp))
 848                                 break;
 849                         tmp = hextoul(newp, &newp);
 850                         *data++ = tmp & 0xFF;
 851                         *len    = *len + 1;
 852                 }
 853                 if (*newp != ']') {
 854                         printf("Unexpected character '%c'\n", *newp);
 855                         return 1;
 856                 }
 857         } else {
 858                 /*
 859                  * Assume it is one or more strings.  Copy it into our
 860                  * data area for convenience (including the
 861                  * terminating '\0's).
 862                  */
 863                 while (stridx < count) {
 864                         size_t length = strlen(newp) + 1;
 865                         strcpy(data, newp);
 866                         data += length;
 867                         *len += length;
 868                         newp = newval[++stridx];
 869                 }
 870         }
 871         return 0;
 872 }
 873
 874 /****************************************************************************/
 875
 876 /*
 877  * Heuristic to guess if this is a string or concatenated strings.
 878  */
 879
 880 static int is_printable_string(const void *data, int len)
 881 {
 882         const char *s = data;
 883         const char *ss, *se;
 884
 885         /* zero length is not */
 886         if (len == 0)
 887                 return 0;
 888
 889         /* must terminate with zero */
 890         if (s[len - 1] != '\0')
 891                 return 0;
 892
 893         se = s + len;
 894
 895         while (s < se) {
 896                 ss = s;
 897                 while (s < se && *s && isprint((unsigned char)*s))
 898                         s++;
 899
 900                 /* not zero, or not done yet */
 901                 if (*s != '\0' || s == ss)
 902                         return 0;
 903
 904                 s++;
 905         }
 906
 907         return 1;
 908 }
 909
 910 /*
 911  * Print the property in the best format, a heuristic guess.  Print as
 912  * a string, concatenated strings, a byte, word, double word, or (if all
 913  * else fails) it is printed as a stream of bytes.
 914  */
 915 static void print_data(const void *data, int len)
 916 {
 917         int j;
 918         const char *env_max_dump;
 919         ulong max_dump = ULONG_MAX;
 920
 921         /* no data, don't print */
 922         if (len == 0)
 923                 return;
 924
 925         env_max_dump = env_get("fdt_max_dump");
 926         if (env_max_dump)
 927                 max_dump = hextoul(env_max_dump, NULL);
 928
 929         /*
 930          * It is a string, but it may have multiple strings (embedded '\0's).
 931          */
 932         if (is_printable_string(data, len)) {
 933                 puts("\"");
 934                 j = 0;
 935                 while (j < len) {
 936                         if (j > 0)
 937                                 puts("\", \"");
 938                         puts(data);
 939                         j    += strlen(data) + 1;
 940                         data += strlen(data) + 1;
 941                 }
 942                 puts("\"");
 943                 return;
 944         }
 945
 946         if ((len %4) == 0) {
 947                 if (len > max_dump)
 948                         printf("* 0x%p [0x%08x]", data, len);
 949                 else {
 950                         const __be32 *p;
 951
 952                         printf("<");
 953                         for (j = 0, p = data; j < len/4; j++)
 954                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 955                                         j < (len/4 - 1) ? " " : "");
 956                         printf(">");
 957                 }
 958         } else { /* anything else... hexdump */
 959                 if (len > max_dump)
 960                         printf("* 0x%p [0x%08x]", data, len);
 961                 else {
 962                         const u8 *s;
 963
 964                         printf("[");
 965                         for (j = 0, s = data; j < len; j++)
 966                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 967                         printf("]");
 968                 }
 969         }
 970 }
 971
 972 /****************************************************************************/
 973
 974 /*
 975  * Recursively print (a portion of) the working_fdt.  The depth parameter
 976  * determines how deeply nested the fdt is printed.
 977  */
 978 static int fdt_print(const char *pathp, char *prop, int depth)
 979 {
 980         static char tabs[MAX_LEVEL+1] =
 981                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 982                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 983         const void *nodep;      /* property node pointer */
 984         int  nodeoffset;        /* node offset from libfdt */
 985         int  nextoffset;        /* next node offset from libfdt */
 986         uint32_t tag;           /* tag */
 987         int  len;               /* length of the property */
 988         int  level = 0;         /* keep track of nesting level */
 989         const struct fdt_property *fdt_prop;
 990
 991         nodeoffset = fdt_path_offset (working_fdt, pathp);
 992         if (nodeoffset < 0) {
 993                 /*
 994                  * Not found or something else bad happened.
 995                  */
 996                 printf ("libfdt fdt_path_offset() returned %s\n",
 997                         fdt_strerror(nodeoffset));
 998                 return 1;
 999         }
1000         /*
1001          * The user passed in a property as well as node path.
1002          * Print only the given property and then return.
1003          */
1004         if (prop) {
1005                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1006                 if (len == 0) {
1007                         /* no property value */
1008                         printf("%s %s\n", pathp, prop);
1009                         return 0;
1010                 } else if (nodep && len > 0) {
1011                         printf("%s = ", prop);
1012                         print_data (nodep, len);
1013                         printf("\n");
1014                         return 0;
1015                 } else {
1016                         printf ("libfdt fdt_getprop(): %s\n",
1017                                 fdt_strerror(len));
1018                         return 1;
1019                 }
1020         }
1021
1022         /*
1023          * The user passed in a node path and no property,
1024          * print the node and all subnodes.
1025          */
1026         while(level >= 0) {
1027                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1028                 switch(tag) {
1029                 case FDT_BEGIN_NODE:
1030                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1031                         if (level <= depth) {
1032                                 if (pathp == NULL)
1033                                         pathp = "/* NULL pointer error */";
1034                                 if (*pathp == '\0')
1035                                         pathp = "/";    /* root is nameless */
1036                                 printf("%s%s {\n",
1037                                         &tabs[MAX_LEVEL - level], pathp);
1038                         }
1039                         level++;
1040                         if (level >= MAX_LEVEL) {
1041                                 printf("Nested too deep, aborting.\n");
1042                                 return 1;
1043                         }
1044                         break;
1045                 case FDT_END_NODE:
1046                         level--;
1047                         if (level <= depth)
1048                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1049                         if (level == 0) {
1050                                 level = -1;             /* exit the loop */
1051                         }
1052                         break;
1053                 case FDT_PROP:
1054                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1055                                         sizeof(*fdt_prop));
1056                         pathp    = fdt_string(working_fdt,
1057                                         fdt32_to_cpu(fdt_prop->nameoff));
1058                         len      = fdt32_to_cpu(fdt_prop->len);
1059                         nodep    = fdt_prop->data;
1060                         if (len < 0) {
1061                                 printf ("libfdt fdt_getprop(): %s\n",
1062                                         fdt_strerror(len));
1063                                 return 1;
1064                         } else if (len == 0) {
1065                                 /* the property has no value */
1066                                 if (level <= depth)
1067                                         printf("%s%s;\n",
1068                                                 &tabs[MAX_LEVEL - level],
1069                                                 pathp);
1070                         } else {
1071                                 if (level <= depth) {
1072                                         printf("%s%s = ",
1073                                                 &tabs[MAX_LEVEL - level],
1074                                                 pathp);
1075                                         print_data (nodep, len);
1076                                         printf(";\n");
1077                                 }
1078                         }
1079                         break;
1080                 case FDT_NOP:
1081                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1082                         break;
1083                 case FDT_END:
1084                         return 1;
1085                 default:
1086                         if (level <= depth)
1087                                 printf("Unknown tag 0x%08X\n", tag);
1088                         return 1;
1089                 }
1090                 nodeoffset = nextoffset;
1091         }
1092         return 0;
1093 }
1094
1095 /********************************************************************/
1096 #ifdef CONFIG_SYS_LONGHELP
1097 static char fdt_help_text[] =
1098         "addr [-c] [-q] <addr> [<size>]  - Set the [control] fdt location to <addr>\n"
1099 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1100         "fdt apply <addr>                    - Apply overlay to the DT\n"
1101 #endif
1102 #ifdef CONFIG_OF_BOARD_SETUP
1103         "fdt boardsetup                      - Do board-specific set up\n"
1104 #endif
1105 #ifdef CONFIG_OF_SYSTEM_SETUP
1106         "fdt systemsetup                     - Do system-specific set up\n"
1107 #endif
1108         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1109         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1110         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1111         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1112         "fdt get value <var> <path> <prop> [<index>] - Get <property> and store in <var>\n"
1113         "                                      In case of stringlist property, use optional <index>\n"
1114         "                                      to select string within the stringlist. Default is 0.\n"
1115         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1116         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1117         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1118         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1119         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1120         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1121         "fdt header [get <var> <member>]     - Display header info\n"
1122         "                                      get - get header member <member> and store it in <var>\n"
1123         "fdt bootcpu <id>                    - Set boot cpuid\n"
1124         "fdt memory <addr> <size>            - Add/Update memory node\n"
1125         "fdt rsvmem print                    - Show current mem reserves\n"
1126         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1127         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1128         "fdt chosen [<start> <size>]         - Add/update the /chosen branch in the tree\n"
1129         "                                        <start>/<size> - initrd start addr/size\n"
1130 #if defined(CONFIG_FIT_SIGNATURE)
1131         "fdt checksign [<addr>]              - check FIT signature\n"
1132         "                                        <start> - addr of key blob\n"
1133         "                                                  default gd->fdt_blob\n"
1134 #endif
1135         "NOTE: Dereference aliases by omitting the leading '/', "
1136                 "e.g. fdt print ethernet0.";
1137 #endif
1138
1139 U_BOOT_CMD(
1140         fdt,    255,    0,      do_fdt,
1141         "flattened device tree utility commands", fdt_help_text
1142 );