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          "\t\tasm - assembler source",
  99         "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
 100         "\n\tOutput dependency file",
 101         "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
 102         "\n\tMake the blob at least <bytes> long (extra space)",
 103         "\n\tAdd padding to the blob of <bytes> long (extra space)",
 104         "\n\tMake the blob align to the <bytes> (extra space)",
 105         "\n\tSet the physical boot cpu",
 106         "\n\tTry to produce output even if the input tree has errors",
 107         "\n\tAdd a path to search for include files",
 108         "\n\tSort nodes and properties before outputting (useful for comparing trees)",
 109         "\n\tValid phandle formats are:\n"
 110          "\t\tlegacy - \"linux,phandle\" properties only\n"
 111          "\t\tepapr  - \"phandle\" properties only\n"
 112          "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
 113         "\n\tEnable/disable warnings (prefix with \"no-\")",
 114         "\n\tEnable/disable errors (prefix with \"no-\")",
 115         "\n\tEnable generation of symbols",
 116         "\n\tEnable auto-alias of labels",
 117         "\n\tPrint this help and exit",
 118         "\n\tPrint version and exit",
 119         NULL,
 120 };
 121
 122 static const char *guess_type_by_name(const char *fname, const char *fallback)
 123 {
 124         const char *s;
 125
 126         s = strrchr(fname, '.');
 127         if (s == NULL)
 128                 return fallback;
 129         if (!strcasecmp(s, ".dts"))
 130                 return "dts";
 131         if (!strcasecmp(s, ".dtb"))
 132                 return "dtb";
 133         return fallback;
 134 }
 135
 136 static const char *guess_input_format(const char *fname, const char *fallback)
 137 {
 138         struct stat statbuf;
 139         fdt32_t magic;
 140         FILE *f;
 141
 142         if (stat(fname, &statbuf) != 0)
 143                 return fallback;
 144
 145         if (S_ISDIR(statbuf.st_mode))
 146                 return "fs";
 147
 148         if (!S_ISREG(statbuf.st_mode))
 149                 return fallback;
 150
 151         f = fopen(fname, "r");
 152         if (f == NULL)
 153                 return fallback;
 154         if (fread(&magic, 4, 1, f) != 1) {
 155                 fclose(f);
 156                 return fallback;
 157         }
 158         fclose(f);
 159
 160         if (fdt32_to_cpu(magic) == FDT_MAGIC)
 161                 return "dtb";
 162
 163         return guess_type_by_name(fname, fallback);
 164 }
 165
 166 int main(int argc, char *argv[])
 167 {
 168         struct dt_info *dti;
 169         const char *inform = NULL;
 170         const char *outform = NULL;
 171         const char *outname = "-";
 172         const char *depname = NULL;
 173         bool force = false, sort = false;
 174         const char *arg;
 175         int opt;
 176         FILE *outf = NULL;
 177         int outversion = DEFAULT_FDT_VERSION;
 178         long long cmdline_boot_cpuid = -1;
 179
 180         quiet      = 0;
 181         reservenum = 0;
 182         minsize    = 0;
 183         padsize    = 0;
 184         alignsize  = 0;
 185
 186         while ((opt = util_getopt_long()) != EOF) {
 187                 switch (opt) {
 188                 case 'I':
 189                         inform = optarg;
 190                         break;
 191                 case 'O':
 192                         outform = optarg;
 193                         break;
 194                 case 'o':
 195                         outname = optarg;
 196                         break;
 197                 case 'V':
 198                         outversion = strtol(optarg, NULL, 0);
 199                         break;
 200                 case 'd':
 201                         depname = optarg;
 202                         break;
 203                 case 'R':
 204                         reservenum = strtol(optarg, NULL, 0);
 205                         break;
 206                 case 'S':
 207                         minsize = strtol(optarg, NULL, 0);
 208                         break;
 209                 case 'p':
 210                         padsize = strtol(optarg, NULL, 0);
 211                         break;
 212                 case 'a':
 213                         alignsize = strtol(optarg, NULL, 0);
 214                         if (!is_power_of_2(alignsize))
 215                                 die("Invalid argument \"%d\" to -a option\n",
 216                                     alignsize);
 217                         break;
 218                 case 'f':
 219                         force = true;
 220                         break;
 221                 case 'q':
 222                         quiet++;
 223                         break;
 224                 case 'b':
 225                         cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
 226                         break;
 227                 case 'i':
 228                         srcfile_add_search_path(optarg);
 229                         break;
 230                 case 'v':
 231                         util_version();
 232                 case 'H':
 233                         if (streq(optarg, "legacy"))
 234                                 phandle_format = PHANDLE_LEGACY;
 235                         else if (streq(optarg, "epapr"))
 236                                 phandle_format = PHANDLE_EPAPR;
 237                         else if (streq(optarg, "both"))
 238                                 phandle_format = PHANDLE_BOTH;
 239                         else
 240                                 die("Invalid argument \"%s\" to -H option\n",
 241                                     optarg);
 242                         break;
 243
 244                 case 's':
 245                         sort = true;
 246                         break;
 247
 248                 case 'W':
 249                         parse_checks_option(true, false, optarg);
 250                         break;
 251
 252                 case 'E':
 253                         parse_checks_option(false, true, optarg);
 254                         break;
 255
 256                 case '@':
 257                         generate_symbols = 1;
 258                         break;
 259                 case 'A':
 260                         auto_label_aliases = 1;
 261                         break;
 262
 263                 case 'h':
 264                         usage(NULL);
 265                 default:
 266                         usage("unknown option");
 267                 }
 268         }
 269
 270         if (argc > (optind+1))
 271                 usage("missing files");
 272         else if (argc < (optind+1))
 273                 arg = "-";
 274         else
 275                 arg = argv[optind];
 276
 277         /* minsize and padsize are mutually exclusive */
 278         if (minsize && padsize)
 279                 die("Can't set both -p and -S\n");
 280
 281         if (depname) {
 282                 depfile = fopen(depname, "w");
 283                 if (!depfile)
 284                         die("Couldn't open dependency file %s: %s\n", depname,
 285                             strerror(errno));
 286                 fprintf(depfile, "%s:", outname);
 287         }
 288
 289         if (inform == NULL)
 290                 inform = guess_input_format(arg, "dts");
 291         if (outform == NULL) {
 292                 outform = guess_type_by_name(outname, NULL);
 293                 if (outform == NULL) {
 294                         if (streq(inform, "dts"))
 295                                 outform = "dtb";
 296                         else
 297                                 outform = "dts";
 298                 }
 299         }
 300         if (streq(inform, "dts"))
 301                 dti = dt_from_source(arg);
 302         else if (streq(inform, "fs"))
 303                 dti = dt_from_fs(arg);
 304         else if(streq(inform, "dtb"))
 305                 dti = dt_from_blob(arg);
 306         else
 307                 die("Unknown input format \"%s\"\n", inform);
 308
 309         dti->outname = outname;
 310
 311         if (depfile) {
 312                 fputc('\n', depfile);
 313                 fclose(depfile);
 314         }
 315
 316         if (cmdline_boot_cpuid != -1)
 317                 dti->boot_cpuid_phys = cmdline_boot_cpuid;
 318
 319         fill_fullpaths(dti->dt, "");
 320
 321         /* on a plugin, generate by default */
 322         if (dti->dtsflags & DTSF_PLUGIN) {
 323                 generate_fixups = 1;
 324         }
 325
 326         process_checks(force, dti);
 327
 328         if (auto_label_aliases)
 329                 generate_label_tree(dti, "aliases", false);
 330
 331         if (generate_symbols)
 332                 generate_label_tree(dti, "__symbols__", true);
 333
 334         if (generate_fixups) {
 335                 generate_fixups_tree(dti, "__fixups__");
 336                 generate_local_fixups_tree(dti, "__local_fixups__");
 337         }
 338
 339         if (sort)
 340                 sort_tree(dti);
 341
 342         if (streq(outname, "-")) {
 343                 outf = stdout;
 344         } else {
 345                 outf = fopen(outname, "wb");
 346                 if (! outf)
 347                         die("Couldn't open output file %s: %s\n",
 348                             outname, strerror(errno));
 349         }
 350
 351         if (streq(outform, "dts")) {
 352                 dt_to_source(outf, dti);
 353         } else if (streq(outform, "dtb")) {
 354                 dt_to_blob(outf, dti, outversion);
 355         } else if (streq(outform, "asm")) {
 356                 dt_to_asm(outf, dti, outversion);
 357         } else if (streq(outform, "null")) {
 358                 /* do nothing */
 359         } else {
 360                 die("Unknown output format \"%s\"\n", outform);
 361         }
 362
 363         exit(0);
 364 }