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_BOTH; /* 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 uint32_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 magic = fdt32_to_cpu(magic); 163 if (magic == FDT_MAGIC) 164 return "dtb"; 165 166 return guess_type_by_name(fname, fallback); 167 } 168 169 int main(int argc, char *argv[]) 170 { 171 struct dt_info *dti; 172 const char *inform = NULL; 173 const char *outform = NULL; 174 const char *outname = "-"; 175 const char *depname = NULL; 176 bool force = false, sort = false; 177 const char *arg; 178 int opt; 179 FILE *outf = NULL; 180 int outversion = DEFAULT_FDT_VERSION; 181 long long cmdline_boot_cpuid = -1; 182 183 quiet = 0; 184 reservenum = 0; 185 minsize = 0; 186 padsize = 0; 187 alignsize = 0; 188 189 while ((opt = util_getopt_long()) != EOF) { 190 switch (opt) { 191 case 'I': 192 inform = optarg; 193 break; 194 case 'O': 195 outform = optarg; 196 break; 197 case 'o': 198 outname = optarg; 199 break; 200 case 'V': 201 outversion = strtol(optarg, NULL, 0); 202 break; 203 case 'd': 204 depname = optarg; 205 break; 206 case 'R': 207 reservenum = strtol(optarg, NULL, 0); 208 break; 209 case 'S': 210 minsize = strtol(optarg, NULL, 0); 211 break; 212 case 'p': 213 padsize = strtol(optarg, NULL, 0); 214 break; 215 case 'a': 216 alignsize = strtol(optarg, NULL, 0); 217 if (!is_power_of_2(alignsize)) 218 die("Invalid argument \"%d\" to -a option\n", 219 optarg); 220 break; 221 case 'f': 222 force = true; 223 break; 224 case 'q': 225 quiet++; 226 break; 227 case 'b': 228 cmdline_boot_cpuid = strtoll(optarg, NULL, 0); 229 break; 230 case 'i': 231 srcfile_add_search_path(optarg); 232 break; 233 case 'v': 234 util_version(); 235 case 'H': 236 if (streq(optarg, "legacy")) 237 phandle_format = PHANDLE_LEGACY; 238 else if (streq(optarg, "epapr")) 239 phandle_format = PHANDLE_EPAPR; 240 else if (streq(optarg, "both")) 241 phandle_format = PHANDLE_BOTH; 242 else 243 die("Invalid argument \"%s\" to -H option\n", 244 optarg); 245 break; 246 247 case 's': 248 sort = true; 249 break; 250 251 case 'W': 252 parse_checks_option(true, false, optarg); 253 break; 254 255 case 'E': 256 parse_checks_option(false, true, optarg); 257 break; 258 259 case '@': 260 generate_symbols = 1; 261 break; 262 case 'A': 263 auto_label_aliases = 1; 264 break; 265 266 case 'h': 267 usage(NULL); 268 default: 269 usage("unknown option"); 270 } 271 } 272 273 if (argc > (optind+1)) 274 usage("missing files"); 275 else if (argc < (optind+1)) 276 arg = "-"; 277 else 278 arg = argv[optind]; 279 280 /* minsize and padsize are mutually exclusive */ 281 if (minsize && padsize) 282 die("Can't set both -p and -S\n"); 283 284 if (depname) { 285 depfile = fopen(depname, "w"); 286 if (!depfile) 287 die("Couldn't open dependency file %s: %s\n", depname, 288 strerror(errno)); 289 fprintf(depfile, "%s:", outname); 290 } 291 292 if (inform == NULL) 293 inform = guess_input_format(arg, "dts"); 294 if (outform == NULL) { 295 outform = guess_type_by_name(outname, NULL); 296 if (outform == NULL) { 297 if (streq(inform, "dts")) 298 outform = "dtb"; 299 else 300 outform = "dts"; 301 } 302 } 303 if (streq(inform, "dts")) 304 dti = dt_from_source(arg); 305 else if (streq(inform, "fs")) 306 dti = dt_from_fs(arg); 307 else if(streq(inform, "dtb")) 308 dti = dt_from_blob(arg); 309 else 310 die("Unknown input format \"%s\"\n", inform); 311 312 if (depfile) { 313 fputc('\n', depfile); 314 fclose(depfile); 315 } 316 317 if (cmdline_boot_cpuid != -1) 318 dti->boot_cpuid_phys = cmdline_boot_cpuid; 319 320 fill_fullpaths(dti->dt, ""); 321 process_checks(force, dti); 322 323 /* on a plugin, generate by default */ 324 if (dti->dtsflags & DTSF_PLUGIN) { 325 generate_fixups = 1; 326 } 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