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 <command.h>
  11 #include <env.h>
  12 #include <image.h>
  13 #include <linux/ctype.h>
  14 #include <linux/types.h>
  15 #include <asm/global_data.h>
  16 #include <linux/libfdt.h>
  17 #include <fdt_support.h>
  18 #include <mapmem.h>
  19 #include <asm/io.h>
  20
  21 #define MAX_LEVEL       32              /* how deeply nested we will go */
  22 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  23
  24 /*
  25  * Global data (for the gd->bd)
  26  */
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  30 static int fdt_print(const char *pathp, char *prop, int depth);
  31 static int is_printable_string(const void *data, int len);
  32
  33 /*
  34  * The working_fdt points to our working flattened device tree.
  35  */
  36 struct fdt_header *working_fdt;
  37
  38 static void set_working_fdt_addr_quiet(ulong addr)
  39 {
  40         void *buf;
  41
  42         buf = map_sysmem(addr, 0);
  43         working_fdt = buf;
  44         env_set_hex("fdtaddr", addr);
  45 }
  46
  47 void set_working_fdt_addr(ulong addr)
  48 {
  49         printf("Working FDT set to %lx\n", addr);
  50         set_working_fdt_addr_quiet(addr);
  51 }
  52
  53 /*
  54  * Get a value from the fdt and format it to be set in the environment
  55  */
  56 static int fdt_value_env_set(const void *nodep, int len,
  57                              const char *var, int index)
  58 {
  59         if (is_printable_string(nodep, len)) {
  60                 const char *nodec = (const char *)nodep;
  61                 int i;
  62
  63                 /*
  64                  * Iterate over all members in stringlist and find the one at
  65                  * offset $index. If no such index exists, indicate failure.
  66                  */
  67                 for (i = 0; i < len; ) {
  68                         if (index-- > 0) {
  69                                 i += strlen(nodec) + 1;
  70                                 nodec += strlen(nodec) + 1;
  71                                 continue;
  72                         }
  73
  74                         env_set(var, nodec);
  75                         return 0;
  76                 }
  77
  78                 return 1;
  79         } else if (len == 4) {
  80                 char buf[11];
  81
  82                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  83                 env_set(var, buf);
  84         } else if (len % 4 == 0 && index >= 0) {
  85                 /* Needed to print integer arrays. */
  86                 const unsigned int *nodec = (const unsigned int *)nodep;
  87                 char buf[11];
  88
  89                 if (index * 4 >= len)
  90                         return 1;
  91
  92                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(nodec + index)));
  93                 env_set(var, buf);
  94         } else if (len % 4 == 0 && len <= 20) {
  95                 /* Needed to print things like sha1 hashes. */
  96                 char buf[41];
  97                 int i;
  98
  99                 for (i = 0; i < len; i += sizeof(unsigned int))
 100                         sprintf(buf + (i * 2), "%08x",
 101                                 *(unsigned int *)(nodep + i));
 102                 env_set(var, buf);
 103         } else {
 104                 printf("error: unprintable value\n");
 105                 return 1;
 106         }
 107         return 0;
 108 }
 109
 110 static const char * const fdt_member_table[] = {
 111         "magic",
 112         "totalsize",
 113         "off_dt_struct",
 114         "off_dt_strings",
 115         "off_mem_rsvmap",
 116         "version",
 117         "last_comp_version",
 118         "boot_cpuid_phys",
 119         "size_dt_strings",
 120         "size_dt_struct",
 121 };
 122
 123 static int fdt_get_header_value(int argc, char *const argv[])
 124 {
 125         fdt32_t *fdtp = (fdt32_t *)working_fdt;
 126         ulong val;
 127         int i;
 128
 129         if (argv[2][0] != 'g')
 130                 return CMD_RET_FAILURE;
 131
 132         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
 133                 if (strcmp(fdt_member_table[i], argv[4]))
 134                         continue;
 135
 136                 val = fdt32_to_cpu(fdtp[i]);
 137                 env_set_hex(argv[3], val);
 138                 return CMD_RET_SUCCESS;
 139         }
 140
 141         return CMD_RET_FAILURE;
 142 }
 143
 144 /*
 145  * Flattened Device Tree command, see the help for parameter definitions.
 146  */
 147 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 148 {
 149         if (argc < 2)
 150                 return CMD_RET_USAGE;
 151
 152         /* fdt addr: Set the address of the fdt */
 153         if (strncmp(argv[1], "ad", 2) == 0) {
 154                 unsigned long addr;
 155                 int control = 0;
 156                 int quiet = 0;
 157                 struct fdt_header *blob;
 158
 159                 /* Set the address [and length] of the fdt */
 160                 argc -= 2;
 161                 argv += 2;
 162                 while (argc > 0 && **argv == '-') {
 163                         char *arg = *argv;
 164
 165                         while (*++arg) {
 166                                 switch (*arg) {
 167                                 case 'c':
 168                                         control = 1;
 169                                         break;
 170                                 case 'q':
 171                                         quiet = 1;
 172                                         break;
 173                                 default:
 174                                         return CMD_RET_USAGE;
 175                                 }
 176                         }
 177                         argc--;
 178                         argv++;
 179                 }
 180                 if (argc == 0) {
 181                         if (control)
 182                                 blob = (struct fdt_header *)gd->fdt_blob;
 183                         else
 184                                 blob = working_fdt;
 185                         if (!blob || !fdt_valid(&blob))
 186                                 return 1;
 187                         printf("%s fdt: %08lx\n",
 188                                control ? "Control" : "Working",
 189                                control ? (ulong)map_to_sysmem(blob) :
 190                                env_get_hex("fdtaddr", 0));
 191                         return 0;
 192                 }
 193
 194                 addr = hextoul(argv[0], NULL);
 195                 blob = map_sysmem(addr, 0);
 196                 if ((quiet && fdt_check_header(blob)) ||
 197                     (!quiet && !fdt_valid(&blob)))
 198                         return 1;
 199                 if (control) {
 200                         gd->fdt_blob = blob;
 201                 } else {
 202                         if (quiet)
 203                                 set_working_fdt_addr_quiet(addr);
 204                         else
 205                                 set_working_fdt_addr(addr);
 206                 }
 207
 208                 if (argc >= 2) {
 209                         int  len;
 210                         int  err;
 211
 212                         /* Optional new length */
 213                         len = hextoul(argv[1], NULL);
 214                         if (len < fdt_totalsize(blob)) {
 215                                 if (!quiet)
 216                                         printf("New length %d < existing length %d, ignoring\n",
 217                                                len, fdt_totalsize(blob));
 218                         } else {
 219                                 /* Open in place with a new length */
 220                                 err = fdt_open_into(blob, blob, len);
 221                                 if (!quiet && err != 0) {
 222                                         printf("libfdt fdt_open_into(): %s\n",
 223                                                fdt_strerror(err));
 224                                 }
 225                         }
 226                 }
 227
 228                 return CMD_RET_SUCCESS;
 229
 230         /*
 231          * Move the working_fdt
 232          */
 233         } else if (strncmp(argv[1], "mo", 2) == 0) {
 234                 struct fdt_header *newaddr;
 235                 int  len;
 236                 int  err;
 237
 238                 if (argc < 4)
 239                         return CMD_RET_USAGE;
 240
 241                 /*
 242                  * Set the address and length of the fdt.
 243                  */
 244                 working_fdt = map_sysmem(hextoul(argv[2], NULL), 0);
 245                 if (!fdt_valid(&working_fdt))
 246                         return 1;
 247
 248                 newaddr = map_sysmem(hextoul(argv[3], NULL), 0);
 249
 250                 /*
 251                  * If the user specifies a length, use that.  Otherwise use the
 252                  * current length.
 253                  */
 254                 if (argc <= 4) {
 255                         len = fdt_totalsize(working_fdt);
 256                 } else {
 257                         len = hextoul(argv[4], NULL);
 258                         if (len < fdt_totalsize(working_fdt)) {
 259                                 printf ("New length 0x%X < existing length "
 260                                         "0x%X, aborting.\n",
 261                                         len, fdt_totalsize(working_fdt));
 262                                 return 1;
 263                         }
 264                 }
 265
 266                 /*
 267                  * Copy to the new location.
 268                  */
 269                 err = fdt_open_into(working_fdt, newaddr, len);
 270                 if (err != 0) {
 271                         printf ("libfdt fdt_open_into(): %s\n",
 272                                 fdt_strerror(err));
 273                         return 1;
 274                 }
 275                 set_working_fdt_addr(map_to_sysmem(newaddr));
 276
 277                 return CMD_RET_SUCCESS;
 278         }
 279
 280         if (!working_fdt) {
 281                 puts("No FDT memory address configured. Please configure\n"
 282                      "the FDT address via \"fdt addr <address>\" command.\n"
 283                      "Aborting!\n");
 284                 return CMD_RET_FAILURE;
 285         }
 286
 287 #ifdef CONFIG_OF_SYSTEM_SETUP
 288         /* Call the board-specific fixup routine */
 289         if (strncmp(argv[1], "sys", 3) == 0) {
 290                 int err = ft_system_setup(working_fdt, gd->bd);
 291
 292                 if (err) {
 293                         printf("Failed to add system information to FDT: %s\n",
 294                                fdt_strerror(err));
 295                         return CMD_RET_FAILURE;
 296                 }
 297
 298                 return CMD_RET_SUCCESS;
 299         }
 300 #endif
 301         /*
 302          * Make a new node
 303          */
 304         if (strncmp(argv[1], "mk", 2) == 0) {
 305                 char *pathp;            /* path */
 306                 char *nodep;            /* new node to add */
 307                 int  nodeoffset;        /* node offset from libfdt */
 308                 int  err;
 309
 310                 /*
 311                  * Parameters: Node path, new node to be appended to the path.
 312                  */
 313                 if (argc < 4)
 314                         return CMD_RET_USAGE;
 315
 316                 pathp = argv[2];
 317                 nodep = argv[3];
 318
 319                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 320                 if (nodeoffset < 0) {
 321                         /*
 322                          * Not found or something else bad happened.
 323                          */
 324                         printf ("libfdt fdt_path_offset() returned %s\n",
 325                                 fdt_strerror(nodeoffset));
 326                         return 1;
 327                 }
 328                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 329                 if (err < 0) {
 330                         printf ("libfdt fdt_add_subnode(): %s\n",
 331                                 fdt_strerror(err));
 332                         return 1;
 333                 }
 334
 335         /*
 336          * Set the value of a property in the working_fdt.
 337          */
 338         } else if (strncmp(argv[1], "se", 2) == 0) {
 339                 char *pathp;            /* path */
 340                 char *prop;             /* property */
 341                 int  nodeoffset;        /* node offset from libfdt */
 342                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 343                 const void *ptmp;
 344                 int  len;               /* new length of the property */
 345                 int  ret;               /* return value */
 346
 347                 /*
 348                  * Parameters: Node path, property, optional value.
 349                  */
 350                 if (argc < 4)
 351                         return CMD_RET_USAGE;
 352
 353                 pathp  = argv[2];
 354                 prop   = argv[3];
 355
 356                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 357                 if (nodeoffset < 0) {
 358                         /*
 359                          * Not found or something else bad happened.
 360                          */
 361                         printf ("libfdt fdt_path_offset() returned %s\n",
 362                                 fdt_strerror(nodeoffset));
 363                         return 1;
 364                 }
 365
 366                 if (argc == 4) {
 367                         len = 0;
 368                 } else {
 369                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 370                         if (len > SCRATCHPAD) {
 371                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 372                                        len);
 373                                 return 1;
 374                         }
 375                         if (ptmp != NULL)
 376                                 memcpy(data, ptmp, len);
 377
 378                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 379                         if (ret != 0)
 380                                 return ret;
 381                 }
 382
 383                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 384                 if (ret < 0) {
 385                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 386                         return 1;
 387                 }
 388
 389         /********************************************************************
 390          * Get the value of a property in the working_fdt.
 391          ********************************************************************/
 392         } else if (argv[1][0] == 'g') {
 393                 char *subcmd;           /* sub-command */
 394                 char *pathp;            /* path */
 395                 char *prop;             /* property */
 396                 char *var;              /* variable to store result */
 397                 int  nodeoffset;        /* node offset from libfdt */
 398                 const void *nodep;      /* property node pointer */
 399                 int  len = 0;           /* new length of the property */
 400
 401                 /*
 402                  * Parameters: Node path, property, optional value.
 403                  */
 404                 if (argc < 5)
 405                         return CMD_RET_USAGE;
 406
 407                 subcmd = argv[2];
 408
 409                 if (argc < 6 && subcmd[0] != 's')
 410                         return CMD_RET_USAGE;
 411
 412                 var    = argv[3];
 413                 pathp  = argv[4];
 414                 prop   = argv[5];
 415
 416                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 417                 if (nodeoffset < 0) {
 418                         /*
 419                          * Not found or something else bad happened.
 420                          */
 421                         printf("libfdt fdt_path_offset() returned %s\n",
 422                                 fdt_strerror(nodeoffset));
 423                         return 1;
 424                 }
 425
 426                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 427                         int req_index = -1;
 428                         int startDepth = fdt_node_depth(
 429                                 working_fdt, nodeoffset);
 430                         int curDepth = startDepth;
 431                         int cur_index = -1;
 432                         int nextNodeOffset = fdt_next_node(
 433                                 working_fdt, nodeoffset, &curDepth);
 434
 435                         if (subcmd[0] == 'n')
 436                                 req_index = hextoul(argv[5], NULL);
 437
 438                         while (curDepth > startDepth) {
 439                                 if (curDepth == startDepth + 1)
 440                                         cur_index++;
 441                                 if (subcmd[0] == 'n' &&
 442                                     cur_index == req_index) {
 443                                         const char *node_name;
 444
 445                                         node_name = fdt_get_name(working_fdt,
 446                                                                  nextNodeOffset,
 447                                                                  NULL);
 448                                         env_set(var, node_name);
 449                                         return 0;
 450                                 }
 451                                 nextNodeOffset = fdt_next_node(
 452                                         working_fdt, nextNodeOffset, &curDepth);
 453                                 if (nextNodeOffset < 0)
 454                                         break;
 455                         }
 456                         if (subcmd[0] == 's') {
 457                                 /* get the num nodes at this level */
 458                                 env_set_ulong(var, cur_index + 1);
 459                         } else {
 460                                 /* node index not found */
 461                                 printf("libfdt node not found\n");
 462                                 return 1;
 463                         }
 464                 } else {
 465                         nodep = fdt_getprop(
 466                                 working_fdt, nodeoffset, prop, &len);
 467                         if (nodep && len >= 0) {
 468                                 if (subcmd[0] == 'v') {
 469                                         int index = -1;
 470                                         int ret;
 471
 472                                         if (len == 0) {
 473                                                 /* no property value */
 474                                                 env_set(var, "");
 475                                                 return 0;
 476                                         }
 477
 478                                         if (argc == 7)
 479                                                 index = simple_strtoul(argv[6], NULL, 10);
 480
 481                                         ret = fdt_value_env_set(nodep, len,
 482                                                                 var, index);
 483                                         if (ret != 0)
 484                                                 return ret;
 485                                 } else if (subcmd[0] == 'a') {
 486                                         env_set_hex(var, (ulong)map_to_sysmem(nodep));
 487                                 } else if (subcmd[0] == 's') {
 488                                         env_set_hex(var, len);
 489                                 } else
 490                                         return CMD_RET_USAGE;
 491                                 return 0;
 492                         } else {
 493                                 printf("libfdt fdt_getprop(): %s\n",
 494                                         fdt_strerror(len));
 495                                 return 1;
 496                         }
 497                 }
 498
 499         /*
 500          * Print (recursive) / List (single level)
 501          */
 502         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 503                 int depth = MAX_LEVEL;  /* how deep to print */
 504                 char *pathp;            /* path */
 505                 char *prop;             /* property */
 506                 int  ret;               /* return value */
 507                 static char root[2] = "/";
 508
 509                 /*
 510                  * list is an alias for print, but limited to 1 level
 511                  */
 512                 if (argv[1][0] == 'l') {
 513                         depth = 1;
 514                 }
 515
 516                 /*
 517                  * Get the starting path.  The root node is an oddball,
 518                  * the offset is zero and has no name.
 519                  */
 520                 if (argc == 2)
 521                         pathp = root;
 522                 else
 523                         pathp = argv[2];
 524                 if (argc > 3)
 525                         prop = argv[3];
 526                 else
 527                         prop = NULL;
 528
 529                 ret = fdt_print(pathp, prop, depth);
 530                 if (ret != 0)
 531                         return ret;
 532
 533         /*
 534          * Remove a property/node
 535          */
 536         } else if (strncmp(argv[1], "rm", 2) == 0) {
 537                 int  nodeoffset;        /* node offset from libfdt */
 538                 int  err;
 539
 540                 /*
 541                  * Get the path.  The root node is an oddball, the offset
 542                  * is zero and has no name.
 543                  */
 544                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 545                 if (nodeoffset < 0) {
 546                         /*
 547                          * Not found or something else bad happened.
 548                          */
 549                         printf ("libfdt fdt_path_offset() returned %s\n",
 550                                 fdt_strerror(nodeoffset));
 551                         return 1;
 552                 }
 553                 /*
 554                  * Do the delete.  A fourth parameter means delete a property,
 555                  * otherwise delete the node.
 556                  */
 557                 if (argc > 3) {
 558                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 559                         if (err < 0) {
 560                                 printf("libfdt fdt_delprop(): %s\n",
 561                                         fdt_strerror(err));
 562                                 return CMD_RET_FAILURE;
 563                         }
 564                 } else {
 565                         err = fdt_del_node(working_fdt, nodeoffset);
 566                         if (err < 0) {
 567                                 printf("libfdt fdt_del_node(): %s\n",
 568                                         fdt_strerror(err));
 569                                 return CMD_RET_FAILURE;
 570                         }
 571                 }
 572
 573         /*
 574          * Display header info
 575          */
 576         } else if (argv[1][0] == 'h') {
 577                 if (argc == 5)
 578                         return fdt_get_header_value(argc, argv);
 579
 580                 u32 version = fdt_version(working_fdt);
 581                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 582                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 583                        fdt_totalsize(working_fdt));
 584                 printf("off_dt_struct:\t\t0x%x\n",
 585                        fdt_off_dt_struct(working_fdt));
 586                 printf("off_dt_strings:\t\t0x%x\n",
 587                        fdt_off_dt_strings(working_fdt));
 588                 printf("off_mem_rsvmap:\t\t0x%x\n",
 589                        fdt_off_mem_rsvmap(working_fdt));
 590                 printf("version:\t\t%d\n", version);
 591                 printf("last_comp_version:\t%d\n",
 592                        fdt_last_comp_version(working_fdt));
 593                 if (version >= 2)
 594                         printf("boot_cpuid_phys:\t0x%x\n",
 595                                 fdt_boot_cpuid_phys(working_fdt));
 596                 if (version >= 3)
 597                         printf("size_dt_strings:\t0x%x\n",
 598                                 fdt_size_dt_strings(working_fdt));
 599                 if (version >= 17)
 600                         printf("size_dt_struct:\t\t0x%x\n",
 601                                 fdt_size_dt_struct(working_fdt));
 602                 printf("number mem_rsv:\t\t0x%x\n",
 603                        fdt_num_mem_rsv(working_fdt));
 604                 printf("\n");
 605
 606         /*
 607          * Set boot cpu id
 608          */
 609         } else if (strncmp(argv[1], "boo", 3) == 0) {
 610                 unsigned long tmp;
 611
 612                 if (argc != 3)
 613                         return CMD_RET_USAGE;
 614
 615                 tmp = hextoul(argv[2], NULL);
 616                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 617
 618         /*
 619          * memory command
 620          */
 621         } else if (strncmp(argv[1], "me", 2) == 0) {
 622                 uint64_t addr, size;
 623                 int err;
 624
 625                 if (argc != 4)
 626                         return CMD_RET_USAGE;
 627
 628                 addr = simple_strtoull(argv[2], NULL, 16);
 629                 size = simple_strtoull(argv[3], NULL, 16);
 630                 err = fdt_fixup_memory(working_fdt, addr, size);
 631                 if (err < 0)
 632                         return err;
 633
 634         /*
 635          * mem reserve commands
 636          */
 637         } else if (strncmp(argv[1], "rs", 2) == 0) {
 638                 if (argv[2][0] == 'p') {
 639                         uint64_t addr, size;
 640                         int total = fdt_num_mem_rsv(working_fdt);
 641                         int j, err;
 642                         printf("index\t\t   start\t\t    size\n");
 643                         printf("-------------------------------"
 644                                 "-----------------\n");
 645                         for (j = 0; j < total; j++) {
 646                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 647                                 if (err < 0) {
 648                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 649                                                         fdt_strerror(err));
 650                                         return err;
 651                                 }
 652                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 653                                         (u32)(addr >> 32),
 654                                         (u32)(addr & 0xffffffff),
 655                                         (u32)(size >> 32),
 656                                         (u32)(size & 0xffffffff));
 657                         }
 658                 } else if (argv[2][0] == 'a') {
 659                         uint64_t addr, size;
 660                         int err;
 661                         addr = simple_strtoull(argv[3], NULL, 16);
 662                         size = simple_strtoull(argv[4], NULL, 16);
 663                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 664
 665                         if (err < 0) {
 666                                 printf("libfdt fdt_add_mem_rsv(): %s\n",
 667                                         fdt_strerror(err));
 668                                 return CMD_RET_FAILURE;
 669                         }
 670                 } else if (argv[2][0] == 'd') {
 671                         unsigned long idx = hextoul(argv[3], NULL);
 672                         int err = fdt_del_mem_rsv(working_fdt, idx);
 673
 674                         if (err < 0) {
 675                                 printf("libfdt fdt_del_mem_rsv(): %s\n",
 676                                         fdt_strerror(err));
 677                                 return CMD_RET_FAILURE;
 678                         }
 679                 } else {
 680                         /* Unrecognized command */
 681                         return CMD_RET_USAGE;
 682                 }
 683         }
 684 #ifdef CONFIG_OF_BOARD_SETUP
 685         /* Call the board-specific fixup routine */
 686         else if (strncmp(argv[1], "boa", 3) == 0) {
 687                 int err = ft_board_setup(working_fdt, gd->bd);
 688
 689                 if (err) {
 690                         printf("Failed to update board information in FDT: %s\n",
 691                                fdt_strerror(err));
 692                         return CMD_RET_FAILURE;
 693                 }
 694 #ifdef CONFIG_ARCH_KEYSTONE
 695                 ft_board_setup_ex(working_fdt, gd->bd);
 696 #endif
 697         }
 698 #endif
 699         /* Create a chosen node */
 700         else if (strncmp(argv[1], "cho", 3) == 0) {
 701                 unsigned long initrd_start = 0, initrd_end = 0;
 702
 703                 if ((argc != 2) && (argc != 4))
 704                         return CMD_RET_USAGE;
 705
 706                 if (argc == 4) {
 707                         initrd_start = hextoul(argv[2], NULL);
 708                         initrd_end = initrd_start + hextoul(argv[3], NULL) - 1;
 709                 }
 710
 711                 fdt_chosen(working_fdt);
 712                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 713
 714 #if defined(CONFIG_FIT_SIGNATURE)
 715         } else if (strncmp(argv[1], "che", 3) == 0) {
 716                 int cfg_noffset;
 717                 int ret;
 718                 unsigned long addr;
 719                 struct fdt_header *blob;
 720
 721                 if (!working_fdt)
 722                         return CMD_RET_FAILURE;
 723
 724                 if (argc > 2) {
 725                         addr = hextoul(argv[2], NULL);
 726                         blob = map_sysmem(addr, 0);
 727                 } else {
 728                         blob = (struct fdt_header *)gd->fdt_blob;
 729                 }
 730                 if (!fdt_valid(&blob))
 731                         return 1;
 732
 733                 gd->fdt_blob = blob;
 734                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 735                 if (cfg_noffset < 0) {
 736                         printf("Could not find configuration node: %s\n",
 737                                fdt_strerror(cfg_noffset));
 738                         return CMD_RET_FAILURE;
 739                 }
 740
 741                 ret = fit_config_verify(working_fdt, cfg_noffset);
 742                 if (ret == 0)
 743                         return CMD_RET_SUCCESS;
 744                 else
 745                         return CMD_RET_FAILURE;
 746 #endif
 747
 748         }
 749 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 750         /* apply an overlay */
 751         else if (strncmp(argv[1], "ap", 2) == 0) {
 752                 unsigned long addr;
 753                 struct fdt_header *blob;
 754                 int ret;
 755
 756                 if (argc != 3)
 757                         return CMD_RET_USAGE;
 758
 759                 if (!working_fdt)
 760                         return CMD_RET_FAILURE;
 761
 762                 addr = hextoul(argv[2], NULL);
 763                 blob = map_sysmem(addr, 0);
 764                 if (!fdt_valid(&blob))
 765                         return CMD_RET_FAILURE;
 766
 767                 /* apply method prints messages on error */
 768                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 769                 if (ret)
 770                         return CMD_RET_FAILURE;
 771         }
 772 #endif
 773         /* resize the fdt */
 774         else if (strncmp(argv[1], "re", 2) == 0) {
 775                 uint extrasize;
 776                 if (argc > 2)
 777                         extrasize = hextoul(argv[2], NULL);
 778                 else
 779                         extrasize = 0;
 780                 fdt_shrink_to_minimum(working_fdt, extrasize);
 781         }
 782         else {
 783                 /* Unrecognized command */
 784                 return CMD_RET_USAGE;
 785         }
 786
 787         return 0;
 788 }
 789
 790 /****************************************************************************/
 791
 792 /*
 793  * Parse the user's input, partially heuristic.  Valid formats:
 794  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 795  *                      C conventions.
 796  * [00 11 22 .. nn] - byte stream
 797  * "string"     - If the the value doesn't start with "<" or "[", it is
 798  *                      treated as a string.  Note that the quotes are
 799  *                      stripped by the parser before we get the string.
 800  * newval: An array of strings containing the new property as specified
 801  *      on the command line
 802  * count: The number of strings in the array
 803  * data: A bytestream to be placed in the property
 804  * len: The length of the resulting bytestream
 805  */
 806 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 807 {
 808         char *cp;               /* temporary char pointer */
 809         char *newp;             /* temporary newval char pointer */
 810         unsigned long tmp;      /* holds converted values */
 811         int stridx = 0;
 812
 813         *len = 0;
 814         newp = newval[0];
 815
 816         /* An array of cells */
 817         if (*newp == '<') {
 818                 newp++;
 819                 while ((*newp != '>') && (stridx < count)) {
 820                         /*
 821                          * Keep searching until we find that last ">"
 822                          * That way users don't have to escape the spaces
 823                          */
 824                         if (*newp == '\0') {
 825                                 newp = newval[++stridx];
 826                                 continue;
 827                         }
 828
 829                         cp = newp;
 830                         tmp = simple_strtoul(cp, &newp, 0);
 831                         if (*cp != '?')
 832                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 833                         else
 834                                 newp++;
 835
 836                         data  += 4;
 837                         *len += 4;
 838
 839                         /* If the ptr didn't advance, something went wrong */
 840                         if ((newp - cp) <= 0) {
 841                                 printf("Sorry, I could not convert \"%s\"\n",
 842                                         cp);
 843                                 return 1;
 844                         }
 845
 846                         while (*newp == ' ')
 847                                 newp++;
 848                 }
 849
 850                 if (*newp != '>') {
 851                         printf("Unexpected character '%c'\n", *newp);
 852                         return 1;
 853                 }
 854         } else if (*newp == '[') {
 855                 /*
 856                  * Byte stream.  Convert the values.
 857                  */
 858                 newp++;
 859                 while ((stridx < count) && (*newp != ']')) {
 860                         while (*newp == ' ')
 861                                 newp++;
 862                         if (*newp == '\0') {
 863                                 newp = newval[++stridx];
 864                                 continue;
 865                         }
 866                         if (!isxdigit(*newp))
 867                                 break;
 868                         tmp = hextoul(newp, &newp);
 869                         *data++ = tmp & 0xFF;
 870                         *len    = *len + 1;
 871                 }
 872                 if (*newp != ']') {
 873                         printf("Unexpected character '%c'\n", *newp);
 874                         return 1;
 875                 }
 876         } else {
 877                 /*
 878                  * Assume it is one or more strings.  Copy it into our
 879                  * data area for convenience (including the
 880                  * terminating '\0's).
 881                  */
 882                 while (stridx < count) {
 883                         size_t length = strlen(newp) + 1;
 884                         strcpy(data, newp);
 885                         data += length;
 886                         *len += length;
 887                         newp = newval[++stridx];
 888                 }
 889         }
 890         return 0;
 891 }
 892
 893 /****************************************************************************/
 894
 895 /*
 896  * Heuristic to guess if this is a string or concatenated strings.
 897  */
 898
 899 static int is_printable_string(const void *data, int len)
 900 {
 901         const char *s = data;
 902         const char *ss, *se;
 903
 904         /* zero length is not */
 905         if (len == 0)
 906                 return 0;
 907
 908         /* must terminate with zero */
 909         if (s[len - 1] != '\0')
 910                 return 0;
 911
 912         se = s + len;
 913
 914         while (s < se) {
 915                 ss = s;
 916                 while (s < se && *s && isprint((unsigned char)*s))
 917                         s++;
 918
 919                 /* not zero, or not done yet */
 920                 if (*s != '\0' || s == ss)
 921                         return 0;
 922
 923                 s++;
 924         }
 925
 926         return 1;
 927 }
 928
 929 /*
 930  * Print the property in the best format, a heuristic guess.  Print as
 931  * a string, concatenated strings, a byte, word, double word, or (if all
 932  * else fails) it is printed as a stream of bytes.
 933  */
 934 static void print_data(const void *data, int len)
 935 {
 936         int j;
 937         const char *env_max_dump;
 938         ulong max_dump = ULONG_MAX;
 939
 940         /* no data, don't print */
 941         if (len == 0)
 942                 return;
 943
 944         env_max_dump = env_get("fdt_max_dump");
 945         if (env_max_dump)
 946                 max_dump = hextoul(env_max_dump, NULL);
 947
 948         /*
 949          * It is a string, but it may have multiple strings (embedded '\0's).
 950          */
 951         if (is_printable_string(data, len)) {
 952                 puts("\"");
 953                 j = 0;
 954                 while (j < len) {
 955                         if (j > 0)
 956                                 puts("\", \"");
 957                         puts(data);
 958                         j    += strlen(data) + 1;
 959                         data += strlen(data) + 1;
 960                 }
 961                 puts("\"");
 962                 return;
 963         }
 964
 965         if ((len %4) == 0) {
 966                 if (len > max_dump)
 967                         printf("* 0x%p [0x%08x]", data, len);
 968                 else {
 969                         const __be32 *p;
 970
 971                         printf("<");
 972                         for (j = 0, p = data; j < len/4; j++)
 973                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 974                                         j < (len/4 - 1) ? " " : "");
 975                         printf(">");
 976                 }
 977         } else { /* anything else... hexdump */
 978                 if (len > max_dump)
 979                         printf("* 0x%p [0x%08x]", data, len);
 980                 else {
 981                         const u8 *s;
 982
 983                         printf("[");
 984                         for (j = 0, s = data; j < len; j++)
 985                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 986                         printf("]");
 987                 }
 988         }
 989 }
 990
 991 /****************************************************************************/
 992
 993 /*
 994  * Recursively print (a portion of) the working_fdt.  The depth parameter
 995  * determines how deeply nested the fdt is printed.
 996  */
 997 static int fdt_print(const char *pathp, char *prop, int depth)
 998 {
 999         static char tabs[MAX_LEVEL+1] =
1000                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
1001                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
1002         const void *nodep;      /* property node pointer */
1003         int  nodeoffset;        /* node offset from libfdt */
1004         int  nextoffset;        /* next node offset from libfdt */
1005         uint32_t tag;           /* tag */
1006         int  len;               /* length of the property */
1007         int  level = 0;         /* keep track of nesting level */
1008         const struct fdt_property *fdt_prop;
1009
1010         nodeoffset = fdt_path_offset (working_fdt, pathp);
1011         if (nodeoffset < 0) {
1012                 /*
1013                  * Not found or something else bad happened.
1014                  */
1015                 printf ("libfdt fdt_path_offset() returned %s\n",
1016                         fdt_strerror(nodeoffset));
1017                 return 1;
1018         }
1019         /*
1020          * The user passed in a property as well as node path.
1021          * Print only the given property and then return.
1022          */
1023         if (prop) {
1024                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
1025                 if (len == 0) {
1026                         /* no property value */
1027                         printf("%s %s\n", pathp, prop);
1028                         return 0;
1029                 } else if (nodep && len > 0) {
1030                         printf("%s = ", prop);
1031                         print_data (nodep, len);
1032                         printf("\n");
1033                         return 0;
1034                 } else {
1035                         printf ("libfdt fdt_getprop(): %s\n",
1036                                 fdt_strerror(len));
1037                         return 1;
1038                 }
1039         }
1040
1041         /*
1042          * The user passed in a node path and no property,
1043          * print the node and all subnodes.
1044          */
1045         while(level >= 0) {
1046                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
1047                 switch(tag) {
1048                 case FDT_BEGIN_NODE:
1049                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
1050                         if (level <= depth) {
1051                                 if (pathp == NULL)
1052                                         pathp = "/* NULL pointer error */";
1053                                 if (*pathp == '\0')
1054                                         pathp = "/";    /* root is nameless */
1055                                 printf("%s%s {\n",
1056                                         &tabs[MAX_LEVEL - level], pathp);
1057                         }
1058                         level++;
1059                         if (level >= MAX_LEVEL) {
1060                                 printf("Nested too deep, aborting.\n");
1061                                 return 1;
1062                         }
1063                         break;
1064                 case FDT_END_NODE:
1065                         level--;
1066                         if (level <= depth)
1067                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1068                         if (level == 0) {
1069                                 level = -1;             /* exit the loop */
1070                         }
1071                         break;
1072                 case FDT_PROP:
1073                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1074                                         sizeof(*fdt_prop));
1075                         pathp    = fdt_string(working_fdt,
1076                                         fdt32_to_cpu(fdt_prop->nameoff));
1077                         len      = fdt32_to_cpu(fdt_prop->len);
1078                         nodep    = fdt_prop->data;
1079                         if (len < 0) {
1080                                 printf ("libfdt fdt_getprop(): %s\n",
1081                                         fdt_strerror(len));
1082                                 return 1;
1083                         } else if (len == 0) {
1084                                 /* the property has no value */
1085                                 if (level <= depth)
1086                                         printf("%s%s;\n",
1087                                                 &tabs[MAX_LEVEL - level],
1088                                                 pathp);
1089                         } else {
1090                                 if (level <= depth) {
1091                                         printf("%s%s = ",
1092                                                 &tabs[MAX_LEVEL - level],
1093                                                 pathp);
1094                                         print_data (nodep, len);
1095                                         printf(";\n");
1096                                 }
1097                         }
1098                         break;
1099                 case FDT_NOP:
1100                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1101                         break;
1102                 case FDT_END:
1103                         return 1;
1104                 default:
1105                         if (level <= depth)
1106                                 printf("Unknown tag 0x%08X\n", tag);
1107                         return 1;
1108                 }
1109                 nodeoffset = nextoffset;
1110         }
1111         return 0;
1112 }
1113
1114 /********************************************************************/
1115 U_BOOT_LONGHELP(fdt,
1116         "addr [-c] [-q] <addr> [<size>]  - Set the [control] fdt location to <addr>\n"
1117 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1118         "fdt apply <addr>                    - Apply overlay to the DT\n"
1119 #endif
1120 #ifdef CONFIG_OF_BOARD_SETUP
1121         "fdt boardsetup                      - Do board-specific set up\n"
1122 #endif
1123 #ifdef CONFIG_OF_SYSTEM_SETUP
1124         "fdt systemsetup                     - Do system-specific set up\n"
1125 #endif
1126         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1127         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1128         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1129         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1130         "fdt get value <var> <path> <prop> [<index>] - Get <property> and store in <var>\n"
1131         "                                      In case of stringlist property, use optional <index>\n"
1132         "                                      to select string within the stringlist. Default is 0.\n"
1133         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1134         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1135         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1136         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1137         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1138         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1139         "fdt header [get <var> <member>]     - Display header info\n"
1140         "                                      get - get header member <member> and store it in <var>\n"
1141         "fdt bootcpu <id>                    - Set boot cpuid\n"
1142         "fdt memory <addr> <size>            - Add/Update memory node\n"
1143         "fdt rsvmem print                    - Show current mem reserves\n"
1144         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1145         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1146         "fdt chosen [<start> <size>]         - Add/update the /chosen branch in the tree\n"
1147         "                                        <start>/<size> - initrd start addr/size\n"
1148 #if defined(CONFIG_FIT_SIGNATURE)
1149         "fdt checksign [<addr>]              - check FIT signature\n"
1150         "                                      <addr> - address of key blob\n"
1151         "                                               default gd->fdt_blob\n"
1152 #endif
1153         "NOTE: Dereference aliases by omitting the leading '/', "
1154                 "e.g. fdt print ethernet0.");
1155
1156 U_BOOT_CMD(
1157         fdt,    255,    0,      do_fdt,
1158         "flattened device tree utility commands", fdt_help_text
1159 );