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 } 365