scripts/dtc/dtc.c

   1 /*
   2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
   3  *
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  18  *                                                                   USA
  19  */
  20
  21 #include <sys/stat.h>
  22
  23 #include "dtc.h"
  24 #include "srcpos.h"
  25
  26 /*
  27  * Command line options
  28  */
  29 int quiet;              /* Level of quietness */
  30 int reservenum;         /* Number of memory reservation slots */
  31 int minsize;            /* Minimum blob size */
  32 int padsize;            /* Additional padding to blob */
  33 int alignsize;          /* Additional padding to blob accroding to the alignsize */
  34 int phandle_format = PHANDLE_EPAPR;     /* Use linux,phandle or phandle properties */
  35 int generate_symbols;   /* enable symbols & fixup support */
  36 int generate_fixups;            /* suppress generation of fixups on symbol support */
  37 int auto_label_aliases;         /* auto generate labels -> aliases */
  38
  39 static int is_power_of_2(int x)
  40 {
  41         return (x > 0) && ((x & (x - 1)) == 0);
  42 }
  43
  44 static void fill_fullpaths(struct node *tree, const char *prefix)
  45 {
  46         struct node *child;
  47         const char *unit;
  48
  49         tree->fullpath = join_path(prefix, tree->name);
  50
  51         unit = strchr(tree->name, '@');
  52         if (unit)
  53                 tree->basenamelen = unit - tree->name;
  54         else
  55                 tree->basenamelen = strlen(tree->name);
  56
  57         for_each_child(tree, child)
  58                 fill_fullpaths(child, tree->fullpath);
  59 }
  60
  61 /* Usage related data. */
  62 static const char usage_synopsis[] = "dtc [options] <input file>";
  63 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv";
  64 static struct option const usage_long_opts[] = {
  65         {"quiet",            no_argument, NULL, 'q'},
  66         {"in-format",         a_argument, NULL, 'I'},
  67         {"out",               a_argument, NULL, 'o'},
  68         {"out-format",        a_argument, NULL, 'O'},
  69         {"out-version",       a_argument, NULL, 'V'},
  70         {"out-dependency",    a_argument, NULL, 'd'},
  71         {"reserve",           a_argument, NULL, 'R'},
  72         {"space",             a_argument, NULL, 'S'},
  73         {"pad",               a_argument, NULL, 'p'},
  74         {"align",             a_argument, NULL, 'a'},
  75         {"boot-cpu",          a_argument, NULL, 'b'},
  76         {"force",            no_argument, NULL, 'f'},
  77         {"include",           a_argument, NULL, 'i'},
  78         {"sort",             no_argument, NULL, 's'},
  79         {"phandle",           a_argument, NULL, 'H'},
  80         {"warning",           a_argument, NULL, 'W'},
  81         {"error",             a_argument, NULL, 'E'},
  82         {"symbols",          no_argument, NULL, '@'},
  83         {"auto-alias",       no_argument, NULL, 'A'},
  84         {"help",             no_argument, NULL, 'h'},
  85         {"version",          no_argument, NULL, 'v'},
  86         {NULL,               no_argument, NULL, 0x0},
  87 };
  88 static const char * const usage_opts_help[] = {
  89         "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
  90         "\n\tInput formats are:\n"
  91          "\t\tdts - device tree source text\n"
  92          "\t\tdtb - device tree blob\n"
  93          "\t\tfs  - /proc/device-tree style directory",
  94         "\n\tOutput file",
  95         "\n\tOutput formats are:\n"
  96          "\t\tdts - device tree source text\n"
  97          "\t\tdtb - device tree blob\n"
  98 #ifndef NO_YAML
  99          "\t\tyaml - device tree encoded as YAML\n"
 100 #endif
 101          "\t\tasm - assembler source",
 102         "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
 103         "\n\tOutput dependency file",
 104         "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
 105         "\n\tMake the blob at least <bytes> long (extra space)",
 106         "\n\tAdd padding to the blob of <bytes> long (extra space)",
 107         "\n\tMake the blob align to the <bytes> (extra space)",
 108         "\n\tSet the physical boot cpu",
 109         "\n\tTry to produce output even if the input tree has errors",
 110         "\n\tAdd a path to search for include files",
 111         "\n\tSort nodes and properties before outputting (useful for comparing trees)",
 112         "\n\tValid phandle formats are:\n"
 113          "\t\tlegacy - \"linux,phandle\" properties only\n"
 114          "\t\tepapr  - \"phandle\" properties only\n"
 115          "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
 116         "\n\tEnable/disable warnings (prefix with \"no-\")",
 117         "\n\tEnable/disable errors (prefix with \"no-\")",
 118         "\n\tEnable generation of symbols",
 119         "\n\tEnable auto-alias of labels",
 120         "\n\tPrint this help and exit",
 121         "\n\tPrint version and exit",
 122         NULL,
 123 };
 124
 125 static const char *guess_type_by_name(const char *fname, const char *fallback)
 126 {
 127         const char *s;
 128
 129         s = strrchr(fname, '.');
 130         if (s == NULL)
 131                 return fallback;
 132         if (!strcasecmp(s, ".dts"))
 133                 return "dts";
 134         if (!strcasecmp(s, ".yaml"))
 135                 return "yaml";
 136         if (!strcasecmp(s, ".dtb"))
 137                 return "dtb";
 138         return fallback;
 139 }
 140
 141 static const char *guess_input_format(const char *fname, const char *fallback)
 142 {
 143         struct stat statbuf;
 144         fdt32_t magic;
 145         FILE *f;
 146
 147         if (stat(fname, &statbuf) != 0)
 148                 return fallback;
 149
 150         if (S_ISDIR(statbuf.st_mode))
 151                 return "fs";
 152
 153         if (!S_ISREG(statbuf.st_mode))
 154                 return fallback;
 155
 156         f = fopen(fname, "r");
 157         if (f == NULL)
 158                 return fallback;
 159         if (fread(&magic, 4, 1, f) != 1) {
 160                 fclose(f);
 161                 return fallback;
 162         }
 163         fclose(f);
 164
 165         if (fdt32_to_cpu(magic) == FDT_MAGIC)
 166                 return "dtb";
 167
 168         return guess_type_by_name(fname, fallback);
 169 }
 170
 171 int main(int argc, char *argv[])
 172 {
 173         struct dt_info *dti;
 174         const char *inform = NULL;
 175         const char *outform = NULL;
 176         const char *outname = "-";
 177         const char *depname = NULL;
 178         bool force = false, sort = false;
 179         const char *arg;
 180         int opt;
 181         FILE *outf = NULL;
 182         int outversion = DEFAULT_FDT_VERSION;
 183         long long cmdline_boot_cpuid = -1;
 184
 185         quiet      = 0;
 186         reservenum = 0;
 187         minsize    = 0;
 188         padsize    = 0;
 189         alignsize  = 0;
 190
 191         while ((opt = util_getopt_long()) != EOF) {
 192                 switch (opt) {
 193                 case 'I':
 194                         inform = optarg;
 195                         break;
 196                 case 'O':
 197                         outform = optarg;
 198                         break;
 199                 case 'o':
 200                         outname = optarg;
 201                         break;
 202                 case 'V':
 203                         outversion = strtol(optarg, NULL, 0);
 204                         break;
 205                 case 'd':
 206                         depname = optarg;
 207                         break;
 208                 case 'R':
 209                         reservenum = strtol(optarg, NULL, 0);
 210                         break;
 211                 case 'S':
 212                         minsize = strtol(optarg, NULL, 0);
 213                         break;
 214                 case 'p':
 215                         padsize = strtol(optarg, NULL, 0);
 216                         break;
 217                 case 'a':
 218                         alignsize = strtol(optarg, NULL, 0);
 219                         if (!is_power_of_2(alignsize))
 220                                 die("Invalid argument \"%d\" to -a option\n",
 221                                     alignsize);
 222                         break;
 223                 case 'f':
 224                         force = true;
 225                         break;
 226                 case 'q':
 227                         quiet++;
 228                         break;
 229                 case 'b':
 230                         cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
 231                         break;
 232                 case 'i':
 233                         srcfile_add_search_path(optarg);
 234                         break;
 235                 case 'v':
 236                         util_version();
 237                 case 'H':
 238                         if (streq(optarg, "legacy"))
 239                                 phandle_format = PHANDLE_LEGACY;
 240                         else if (streq(optarg, "epapr"))
 241                                 phandle_format = PHANDLE_EPAPR;
 242                         else if (streq(optarg, "both"))
 243                                 phandle_format = PHANDLE_BOTH;
 244                         else
 245                                 die("Invalid argument \"%s\" to -H option\n",
 246                                     optarg);
 247                         break;
 248
 249                 case 's':
 250                         sort = true;
 251                         break;
 252
 253                 case 'W':
 254                         parse_checks_option(true, false, optarg);
 255                         break;
 256
 257                 case 'E':
 258                         parse_checks_option(false, true, optarg);
 259                         break;
 260
 261                 case '@':
 262                         generate_symbols = 1;
 263                         break;
 264                 case 'A':
 265                         auto_label_aliases = 1;
 266                         break;
 267
 268                 case 'h':
 269                         usage(NULL);
 270                 default:
 271                         usage("unknown option");
 272                 }
 273         }
 274
 275         if (argc > (optind+1))
 276                 usage("missing files");
 277         else if (argc < (optind+1))
 278                 arg = "-";
 279         else
 280                 arg = argv[optind];
 281
 282         /* minsize and padsize are mutually exclusive */
 283         if (minsize && padsize)
 284                 die("Can't set both -p and -S\n");
 285
 286         if (depname) {
 287                 depfile = fopen(depname, "w");
 288                 if (!depfile)
 289                         die("Couldn't open dependency file %s: %s\n", depname,
 290                             strerror(errno));
 291                 fprintf(depfile, "%s:", outname);
 292         }
 293
 294         if (inform == NULL)
 295                 inform = guess_input_format(arg, "dts");
 296         if (outform == NULL) {
 297                 outform = guess_type_by_name(outname, NULL);
 298                 if (outform == NULL) {
 299                         if (streq(inform, "dts"))
 300                                 outform = "dtb";
 301                         else
 302                                 outform = "dts";
 303                 }
 304         }
 305         if (streq(inform, "dts"))
 306                 dti = dt_from_source(arg);
 307         else if (streq(inform, "fs"))
 308                 dti = dt_from_fs(arg);
 309         else if(streq(inform, "dtb"))
 310                 dti = dt_from_blob(arg);
 311         else
 312                 die("Unknown input format \"%s\"\n", inform);
 313
 314         dti->outname = outname;
 315
 316         if (depfile) {
 317                 fputc('\n', depfile);
 318                 fclose(depfile);
 319         }
 320
 321         if (cmdline_boot_cpuid != -1)
 322                 dti->boot_cpuid_phys = cmdline_boot_cpuid;
 323
 324         fill_fullpaths(dti->dt, "");
 325
 326         /* on a plugin, generate by default */
 327         if (dti->dtsflags & DTSF_PLUGIN) {
 328                 generate_fixups = 1;
 329         }
 330
 331         process_checks(force, dti);
 332
 333         if (auto_label_aliases)
 334                 generate_label_tree(dti, "aliases", false);
 335
 336         if (generate_symbols)
 337                 generate_label_tree(dti, "__symbols__", true);
 338
 339         if (generate_fixups) {
 340                 generate_fixups_tree(dti, "__fixups__");
 341                 generate_local_fixups_tree(dti, "__local_fixups__");
 342         }
 343
 344         if (sort)
 345                 sort_tree(dti);
 346
 347         if (streq(outname, "-")) {
 348                 outf = stdout;
 349         } else {
 350                 outf = fopen(outname, "wb");
 351                 if (! outf)
 352                         die("Couldn't open output file %s: %s\n",
 353                             outname, strerror(errno));
 354         }
 355
 356         if (streq(outform, "dts")) {
 357                 dt_to_source(outf, dti);
 358 #ifndef NO_YAML
 359         } else if (streq(outform, "yaml")) {
 360                 if (!streq(inform, "dts"))
 361                         die("YAML output format requires dts input format\n");
 362                 dt_to_yaml(outf, dti);
 363 #endif
 364         } else if (streq(outform, "dtb")) {
 365                 dt_to_blob(outf, dti, outversion);
 366         } else if (streq(outform, "asm")) {
 367                 dt_to_asm(outf, dti, outversion);
 368         } else if (streq(outform, "null")) {
 369                 /* do nothing */
 370         } else {
 371                 die("Unknown output format \"%s\"\n", outform);
 372         }
 373
 374         exit(0);
 375 }