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 phandle_format = PHANDLE_BOTH;      /* Use linux,phandle or phandle properties */
  34
  35 static void fill_fullpaths(struct node *tree, const char *prefix)
  36 {
  37         struct node *child;
  38         const char *unit;
  39
  40         tree->fullpath = join_path(prefix, tree->name);
  41
  42         unit = strchr(tree->name, '@');
  43         if (unit)
  44                 tree->basenamelen = unit - tree->name;
  45         else
  46                 tree->basenamelen = strlen(tree->name);
  47
  48         for_each_child(tree, child)
  49                 fill_fullpaths(child, tree->fullpath);
  50 }
  51
  52 /* Usage related data. */
  53 #define FDT_VERSION(version)    _FDT_VERSION(version)
  54 #define _FDT_VERSION(version)   #version
  55 static const char usage_synopsis[] = "dtc [options] <input file>";
  56 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv";
  57 static struct option const usage_long_opts[] = {
  58         {"quiet",            no_argument, NULL, 'q'},
  59         {"in-format",         a_argument, NULL, 'I'},
  60         {"out",               a_argument, NULL, 'o'},
  61         {"out-format",        a_argument, NULL, 'O'},
  62         {"out-version",       a_argument, NULL, 'V'},
  63         {"out-dependency",    a_argument, NULL, 'd'},
  64         {"reserve",           a_argument, NULL, 'R'},
  65         {"space",             a_argument, NULL, 'S'},
  66         {"pad",               a_argument, NULL, 'p'},
  67         {"boot-cpu",          a_argument, NULL, 'b'},
  68         {"force",            no_argument, NULL, 'f'},
  69         {"include",           a_argument, NULL, 'i'},
  70         {"sort",             no_argument, NULL, 's'},
  71         {"phandle",           a_argument, NULL, 'H'},
  72         {"warning",           a_argument, NULL, 'W'},
  73         {"error",             a_argument, NULL, 'E'},
  74         {"help",             no_argument, NULL, 'h'},
  75         {"version",          no_argument, NULL, 'v'},
  76         {NULL,               no_argument, NULL, 0x0},
  77 };
  78 static const char * const usage_opts_help[] = {
  79         "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
  80         "\n\tInput formats are:\n"
  81          "\t\tdts - device tree source text\n"
  82          "\t\tdtb - device tree blob\n"
  83          "\t\tfs  - /proc/device-tree style directory",
  84         "\n\tOutput file",
  85         "\n\tOutput formats are:\n"
  86          "\t\tdts - device tree source text\n"
  87          "\t\tdtb - device tree blob\n"
  88          "\t\tasm - assembler source",
  89         "\n\tBlob version to produce, defaults to "FDT_VERSION(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
  90         "\n\tOutput dependency file",
  91         "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
  92         "\n\tMake the blob at least <bytes> long (extra space)",
  93         "\n\tAdd padding to the blob of <bytes> long (extra space)",
  94         "\n\tSet the physical boot cpu",
  95         "\n\tTry to produce output even if the input tree has errors",
  96         "\n\tAdd a path to search for include files",
  97         "\n\tSort nodes and properties before outputting (useful for comparing trees)",
  98         "\n\tValid phandle formats are:\n"
  99          "\t\tlegacy - \"linux,phandle\" properties only\n"
 100          "\t\tepapr  - \"phandle\" properties only\n"
 101          "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
 102         "\n\tEnable/disable warnings (prefix with \"no-\")",
 103         "\n\tEnable/disable errors (prefix with \"no-\")",
 104         "\n\tPrint this help and exit",
 105         "\n\tPrint version and exit",
 106         NULL,
 107 };
 108
 109 static const char *guess_type_by_name(const char *fname, const char *fallback)
 110 {
 111         const char *s;
 112
 113         s = strrchr(fname, '.');
 114         if (s == NULL)
 115                 return fallback;
 116         if (!strcasecmp(s, ".dts"))
 117                 return "dts";
 118         if (!strcasecmp(s, ".dtb"))
 119                 return "dtb";
 120         return fallback;
 121 }
 122
 123 static const char *guess_input_format(const char *fname, const char *fallback)
 124 {
 125         struct stat statbuf;
 126         uint32_t magic;
 127         FILE *f;
 128
 129         if (stat(fname, &statbuf) != 0)
 130                 return fallback;
 131
 132         if (S_ISDIR(statbuf.st_mode))
 133                 return "fs";
 134
 135         if (!S_ISREG(statbuf.st_mode))
 136                 return fallback;
 137
 138         f = fopen(fname, "r");
 139         if (f == NULL)
 140                 return fallback;
 141         if (fread(&magic, 4, 1, f) != 1) {
 142                 fclose(f);
 143                 return fallback;
 144         }
 145         fclose(f);
 146
 147         magic = fdt32_to_cpu(magic);
 148         if (magic == FDT_MAGIC)
 149                 return "dtb";
 150
 151         return guess_type_by_name(fname, fallback);
 152 }
 153
 154 int main(int argc, char *argv[])
 155 {
 156         struct boot_info *bi;
 157         const char *inform = NULL;
 158         const char *outform = NULL;
 159         const char *outname = "-";
 160         const char *depname = NULL;
 161         bool force = false, sort = false;
 162         const char *arg;
 163         int opt;
 164         FILE *outf = NULL;
 165         int outversion = DEFAULT_FDT_VERSION;
 166         long long cmdline_boot_cpuid = -1;
 167
 168         quiet      = 0;
 169         reservenum = 0;
 170         minsize    = 0;
 171         padsize    = 0;
 172
 173         while ((opt = util_getopt_long()) != EOF) {
 174                 switch (opt) {
 175                 case 'I':
 176                         inform = optarg;
 177                         break;
 178                 case 'O':
 179                         outform = optarg;
 180                         break;
 181                 case 'o':
 182                         outname = optarg;
 183                         break;
 184                 case 'V':
 185                         outversion = strtol(optarg, NULL, 0);
 186                         break;
 187                 case 'd':
 188                         depname = optarg;
 189                         break;
 190                 case 'R':
 191                         reservenum = strtol(optarg, NULL, 0);
 192                         break;
 193                 case 'S':
 194                         minsize = strtol(optarg, NULL, 0);
 195                         break;
 196                 case 'p':
 197                         padsize = strtol(optarg, NULL, 0);
 198                         break;
 199                 case 'f':
 200                         force = true;
 201                         break;
 202                 case 'q':
 203                         quiet++;
 204                         break;
 205                 case 'b':
 206                         cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
 207                         break;
 208                 case 'i':
 209                         srcfile_add_search_path(optarg);
 210                         break;
 211                 case 'v':
 212                         util_version();
 213                 case 'H':
 214                         if (streq(optarg, "legacy"))
 215                                 phandle_format = PHANDLE_LEGACY;
 216                         else if (streq(optarg, "epapr"))
 217                                 phandle_format = PHANDLE_EPAPR;
 218                         else if (streq(optarg, "both"))
 219                                 phandle_format = PHANDLE_BOTH;
 220                         else
 221                                 die("Invalid argument \"%s\" to -H option\n",
 222                                     optarg);
 223                         break;
 224
 225                 case 's':
 226                         sort = true;
 227                         break;
 228
 229                 case 'W':
 230                         parse_checks_option(true, false, optarg);
 231                         break;
 232
 233                 case 'E':
 234                         parse_checks_option(false, true, optarg);
 235                         break;
 236
 237                 case 'h':
 238                         usage(NULL);
 239                 default:
 240                         usage("unknown option");
 241                 }
 242         }
 243
 244         if (argc > (optind+1))
 245                 usage("missing files");
 246         else if (argc < (optind+1))
 247                 arg = "-";
 248         else
 249                 arg = argv[optind];
 250
 251         /* minsize and padsize are mutually exclusive */
 252         if (minsize && padsize)
 253                 die("Can't set both -p and -S\n");
 254
 255         if (depname) {
 256                 depfile = fopen(depname, "w");
 257                 if (!depfile)
 258                         die("Couldn't open dependency file %s: %s\n", depname,
 259                             strerror(errno));
 260                 fprintf(depfile, "%s:", outname);
 261         }
 262
 263         if (inform == NULL)
 264                 inform = guess_input_format(arg, "dts");
 265         if (outform == NULL) {
 266                 outform = guess_type_by_name(outname, NULL);
 267                 if (outform == NULL) {
 268                         if (streq(inform, "dts"))
 269                                 outform = "dtb";
 270                         else
 271                                 outform = "dts";
 272                 }
 273         }
 274         if (streq(inform, "dts"))
 275                 bi = dt_from_source(arg);
 276         else if (streq(inform, "fs"))
 277                 bi = dt_from_fs(arg);
 278         else if(streq(inform, "dtb"))
 279                 bi = dt_from_blob(arg);
 280         else
 281                 die("Unknown input format \"%s\"\n", inform);
 282
 283         if (depfile) {
 284                 fputc('\n', depfile);
 285                 fclose(depfile);
 286         }
 287
 288         if (cmdline_boot_cpuid != -1)
 289                 bi->boot_cpuid_phys = cmdline_boot_cpuid;
 290
 291         fill_fullpaths(bi->dt, "");
 292         process_checks(force, bi);
 293
 294         if (sort)
 295                 sort_tree(bi);
 296
 297         if (streq(outname, "-")) {
 298                 outf = stdout;
 299         } else {
 300                 outf = fopen(outname, "wb");
 301                 if (! outf)
 302                         die("Couldn't open output file %s: %s\n",
 303                             outname, strerror(errno));
 304         }
 305
 306         if (streq(outform, "dts")) {
 307                 dt_to_source(outf, bi);
 308         } else if (streq(outform, "dtb")) {
 309                 dt_to_blob(outf, bi, outversion);
 310         } else if (streq(outform, "asm")) {
 311                 dt_to_asm(outf, bi, outversion);
 312         } else if (streq(outform, "null")) {
 313                 /* do nothing */
 314         } else {
 315                 die("Unknown output format \"%s\"\n", outform);
 316         }
 317
 318         exit(0);
 319 }