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 #define FDT_VERSION(version) _FDT_VERSION(version) 63 #define _FDT_VERSION(version) #version 64 static const char usage_synopsis[] = "dtc [options] <input file>"; 65 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv"; 66 static struct option const usage_long_opts[] = { 67 {"quiet", no_argument, NULL, 'q'}, 68 {"in-format", a_argument, NULL, 'I'}, 69 {"out", a_argument, NULL, 'o'}, 70 {"out-format", a_argument, NULL, 'O'}, 71 {"out-version", a_argument, NULL, 'V'}, 72 {"out-dependency", a_argument, NULL, 'd'}, 73 {"reserve", a_argument, NULL, 'R'}, 74 {"space", a_argument, NULL, 'S'}, 75 {"pad", a_argument, NULL, 'p'}, 76 {"align", a_argument, NULL, 'a'}, 77 {"boot-cpu", a_argument, NULL, 'b'}, 78 {"force", no_argument, NULL, 'f'}, 79 {"include", a_argument, NULL, 'i'}, 80 {"sort", no_argument, NULL, 's'}, 81 {"phandle", a_argument, NULL, 'H'}, 82 {"warning", a_argument, NULL, 'W'}, 83 {"error", a_argument, NULL, 'E'}, 84 {"symbols", no_argument, NULL, '@'}, 85 {"auto-alias", no_argument, NULL, 'A'}, 86 {"help", no_argument, NULL, 'h'}, 87 {"version", no_argument, NULL, 'v'}, 88 {NULL, no_argument, NULL, 0x0}, 89 }; 90 static const char * const usage_opts_help[] = { 91 "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all", 92 "\n\tInput formats are:\n" 93 "\t\tdts - device tree source text\n" 94 "\t\tdtb - device tree blob\n" 95 "\t\tfs - /proc/device-tree style directory", 96 "\n\tOutput file", 97 "\n\tOutput formats are:\n" 98 "\t\tdts - device tree source text\n" 99 "\t\tdtb - device tree blob\n" 100 "\t\tasm - assembler source", 101 "\n\tBlob version to produce, defaults to "FDT_VERSION(DEFAULT_FDT_VERSION)" (for dtb and asm output)", 102 "\n\tOutput dependency file", 103 "\n\tMake space for <number> reserve map entries (for dtb and asm output)", 104 "\n\tMake the blob at least <bytes> long (extra space)", 105 "\n\tAdd padding to the blob of <bytes> long (extra space)", 106 "\n\tMake the blob align to the <bytes> (extra space)", 107 "\n\tSet the physical boot cpu", 108 "\n\tTry to produce output even if the input tree has errors", 109 "\n\tAdd a path to search for include files", 110 "\n\tSort nodes and properties before outputting (useful for comparing trees)", 111 "\n\tValid phandle formats are:\n" 112 "\t\tlegacy - \"linux,phandle\" properties only\n" 113 "\t\tepapr - \"phandle\" properties only\n" 114 "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties", 115 "\n\tEnable/disable warnings (prefix with \"no-\")", 116 "\n\tEnable/disable errors (prefix with \"no-\")", 117 "\n\tEnable generation of symbols", 118 "\n\tEnable auto-alias of labels", 119 "\n\tPrint this help and exit", 120 "\n\tPrint version and exit", 121 NULL, 122 }; 123 124 static const char *guess_type_by_name(const char *fname, const char *fallback) 125 { 126 const char *s; 127 128 s = strrchr(fname, '.'); 129 if (s == NULL) 130 return fallback; 131 if (!strcasecmp(s, ".dts")) 132 return "dts"; 133 if (!strcasecmp(s, ".dtb")) 134 return "dtb"; 135 return fallback; 136 } 137 138 static const char *guess_input_format(const char *fname, const char *fallback) 139 { 140 struct stat statbuf; 141 fdt32_t magic; 142 FILE *f; 143 144 if (stat(fname, &statbuf) != 0) 145 return fallback; 146 147 if (S_ISDIR(statbuf.st_mode)) 148 return "fs"; 149 150 if (!S_ISREG(statbuf.st_mode)) 151 return fallback; 152 153 f = fopen(fname, "r"); 154 if (f == NULL) 155 return fallback; 156 if (fread(&magic, 4, 1, f) != 1) { 157 fclose(f); 158 return fallback; 159 } 160 fclose(f); 161 162 if (fdt32_to_cpu(magic) == FDT_MAGIC) 163 return "dtb"; 164 165 return guess_type_by_name(fname, fallback); 166 } 167 168 int main(int argc, char *argv[]) 169 { 170 struct dt_info *dti; 171 const char *inform = NULL; 172 const char *outform = NULL; 173 const char *outname = "-"; 174 const char *depname = NULL; 175 bool force = false, sort = false; 176 const char *arg; 177 int opt; 178 FILE *outf = NULL; 179 int outversion = DEFAULT_FDT_VERSION; 180 long long cmdline_boot_cpuid = -1; 181 182 quiet = 0; 183 reservenum = 0; 184 minsize = 0; 185 padsize = 0; 186 alignsize = 0; 187 188 while ((opt = util_getopt_long()) != EOF) { 189 switch (opt) { 190 case 'I': 191 inform = optarg; 192 break; 193 case 'O': 194 outform = optarg; 195 break; 196 case 'o': 197 outname = optarg; 198 break; 199 case 'V': 200 outversion = strtol(optarg, NULL, 0); 201 break; 202 case 'd': 203 depname = optarg; 204 break; 205 case 'R': 206 reservenum = strtol(optarg, NULL, 0); 207 break; 208 case 'S': 209 minsize = strtol(optarg, NULL, 0); 210 break; 211 case 'p': 212 padsize = strtol(optarg, NULL, 0); 213 break; 214 case 'a': 215 alignsize = strtol(optarg, NULL, 0); 216 if (!is_power_of_2(alignsize)) 217 die("Invalid argument \"%d\" to -a option\n", 218 alignsize); 219 break; 220 case 'f': 221 force = true; 222 break; 223 case 'q': 224 quiet++; 225 break; 226 case 'b': 227 cmdline_boot_cpuid = strtoll(optarg, NULL, 0); 228 break; 229 case 'i': 230 srcfile_add_search_path(optarg); 231 break; 232 case 'v': 233 util_version(); 234 case 'H': 235 if (streq(optarg, "legacy")) 236 phandle_format = PHANDLE_LEGACY; 237 else if (streq(optarg, "epapr")) 238 phandle_format = PHANDLE_EPAPR; 239 else if (streq(optarg, "both")) 240 phandle_format = PHANDLE_BOTH; 241 else 242 die("Invalid argument \"%s\" to -H option\n", 243 optarg); 244 break; 245 246 case 's': 247 sort = true; 248 break; 249 250 case 'W': 251 parse_checks_option(true, false, optarg); 252 break; 253 254 case 'E': 255 parse_checks_option(false, true, optarg); 256 break; 257 258 case '@': 259 generate_symbols = 1; 260 break; 261 case 'A': 262 auto_label_aliases = 1; 263 break; 264 265 case 'h': 266 usage(NULL); 267 default: 268 usage("unknown option"); 269 } 270 } 271 272 if (argc > (optind+1)) 273 usage("missing files"); 274 else if (argc < (optind+1)) 275 arg = "-"; 276 else 277 arg = argv[optind]; 278 279 /* minsize and padsize are mutually exclusive */ 280 if (minsize && padsize) 281 die("Can't set both -p and -S\n"); 282 283 if (depname) { 284 depfile = fopen(depname, "w"); 285 if (!depfile) 286 die("Couldn't open dependency file %s: %s\n", depname, 287 strerror(errno)); 288 fprintf(depfile, "%s:", outname); 289 } 290 291 if (inform == NULL) 292 inform = guess_input_format(arg, "dts"); 293 if (outform == NULL) { 294 outform = guess_type_by_name(outname, NULL); 295 if (outform == NULL) { 296 if (streq(inform, "dts")) 297 outform = "dtb"; 298 else 299 outform = "dts"; 300 } 301 } 302 if (streq(inform, "dts")) 303 dti = dt_from_source(arg); 304 else if (streq(inform, "fs")) 305 dti = dt_from_fs(arg); 306 else if(streq(inform, "dtb")) 307 dti = dt_from_blob(arg); 308 else 309 die("Unknown input format \"%s\"\n", inform); 310 311 dti->outname = outname; 312 313 if (depfile) { 314 fputc('\n', depfile); 315 fclose(depfile); 316 } 317 318 if (cmdline_boot_cpuid != -1) 319 dti->boot_cpuid_phys = cmdline_boot_cpuid; 320 321 fill_fullpaths(dti->dt, ""); 322 process_checks(force, dti); 323 324 /* on a plugin, generate by default */ 325 if (dti->dtsflags & DTSF_PLUGIN) { 326 generate_fixups = 1; 327 } 328 329 if (auto_label_aliases) 330 generate_label_tree(dti, "aliases", false); 331 332 if (generate_symbols) 333 generate_label_tree(dti, "__symbols__", true); 334 335 if (generate_fixups) { 336 generate_fixups_tree(dti, "__fixups__"); 337 generate_local_fixups_tree(dti, "__local_fixups__"); 338 } 339 340 if (sort) 341 sort_tree(dti); 342 343 if (streq(outname, "-")) { 344 outf = stdout; 345 } else { 346 outf = fopen(outname, "wb"); 347 if (! outf) 348 die("Couldn't open output file %s: %s\n", 349 outname, strerror(errno)); 350 } 351 352 if (streq(outform, "dts")) { 353 dt_to_source(outf, dti); 354 } else if (streq(outform, "dtb")) { 355 dt_to_blob(outf, dti, outversion); 356 } else if (streq(outform, "asm")) { 357 dt_to_asm(outf, dti, outversion); 358 } else if (streq(outform, "null")) { 359 /* do nothing */ 360 } else { 361 die("Unknown output format \"%s\"\n", outform); 362 } 363 364 exit(0); 365 } 366