1 /* $NetBSD: dtc.c,v 1.1.1.3 2019/12/22 12:34:03 skrll Exp $ */ 2 3 // SPDX-License-Identifier: GPL-2.0-or-later 4 /* 5 * (C) Copyright David Gibson <dwg (at) au1.ibm.com>, IBM Corporation. 2005. 6 */ 7 8 #include <sys/stat.h> 9 10 #include "dtc.h" 11 #include "srcpos.h" 12 13 /* 14 * Command line options 15 */ 16 int quiet; /* Level of quietness */ 17 int reservenum; /* Number of memory reservation slots */ 18 int minsize; /* Minimum blob size */ 19 int padsize; /* Additional padding to blob */ 20 int alignsize; /* Additional padding to blob accroding to the alignsize */ 21 int phandle_format = PHANDLE_EPAPR; /* Use linux,phandle or phandle properties */ 22 int generate_symbols; /* enable symbols & fixup support */ 23 int generate_fixups; /* suppress generation of fixups on symbol support */ 24 int auto_label_aliases; /* auto generate labels -> aliases */ 25 int annotate; /* Level of annotation: 1 for input source location 26 >1 for full input source location. */ 27 28 static int is_power_of_2(int x) 29 { 30 return (x > 0) && ((x & (x - 1)) == 0); 31 } 32 33 static void fill_fullpaths(struct node *tree, const char *prefix) 34 { 35 struct node *child; 36 const char *unit; 37 38 tree->fullpath = join_path(prefix, tree->name); 39 40 unit = strchr(tree->name, '@'); 41 if (unit) 42 tree->basenamelen = unit - tree->name; 43 else 44 tree->basenamelen = strlen(tree->name); 45 46 for_each_child(tree, child) 47 fill_fullpaths(child, tree->fullpath); 48 } 49 50 /* Usage related data. */ 51 static const char usage_synopsis[] = "dtc [options] <input file>"; 52 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@AThv"; 53 static struct option const usage_long_opts[] = { 54 {"quiet", no_argument, NULL, 'q'}, 55 {"in-format", a_argument, NULL, 'I'}, 56 {"out", a_argument, NULL, 'o'}, 57 {"out-format", a_argument, NULL, 'O'}, 58 {"out-version", a_argument, NULL, 'V'}, 59 {"out-dependency", a_argument, NULL, 'd'}, 60 {"reserve", a_argument, NULL, 'R'}, 61 {"space", a_argument, NULL, 'S'}, 62 {"pad", a_argument, NULL, 'p'}, 63 {"align", a_argument, NULL, 'a'}, 64 {"boot-cpu", a_argument, NULL, 'b'}, 65 {"force", no_argument, NULL, 'f'}, 66 {"include", a_argument, NULL, 'i'}, 67 {"sort", no_argument, NULL, 's'}, 68 {"phandle", a_argument, NULL, 'H'}, 69 {"warning", a_argument, NULL, 'W'}, 70 {"error", a_argument, NULL, 'E'}, 71 {"symbols", no_argument, NULL, '@'}, 72 {"auto-alias", no_argument, NULL, 'A'}, 73 {"annotate", no_argument, NULL, 'T'}, 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 #ifndef NO_YAML 89 "\t\tyaml - device tree encoded as YAML\n" 90 #endif 91 "\t\tasm - assembler source", 92 "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)", 93 "\n\tOutput dependency file", 94 "\n\tMake space for <number> reserve map entries (for dtb and asm output)", 95 "\n\tMake the blob at least <bytes> long (extra space)", 96 "\n\tAdd padding to the blob of <bytes> long (extra space)", 97 "\n\tMake the blob align to the <bytes> (extra space)", 98 "\n\tSet the physical boot cpu", 99 "\n\tTry to produce output even if the input tree has errors", 100 "\n\tAdd a path to search for include files", 101 "\n\tSort nodes and properties before outputting (useful for comparing trees)", 102 "\n\tValid phandle formats are:\n" 103 "\t\tlegacy - \"linux,phandle\" properties only\n" 104 "\t\tepapr - \"phandle\" properties only\n" 105 "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties", 106 "\n\tEnable/disable warnings (prefix with \"no-\")", 107 "\n\tEnable/disable errors (prefix with \"no-\")", 108 "\n\tEnable generation of symbols", 109 "\n\tEnable auto-alias of labels", 110 "\n\tAnnotate output .dts with input source file and line (-T -T for more details)", 111 "\n\tPrint this help and exit", 112 "\n\tPrint version and exit", 113 NULL, 114 }; 115 116 static const char *guess_type_by_name(const char *fname, const char *fallback) 117 { 118 const char *s; 119 120 s = strrchr(fname, '.'); 121 if (s == NULL) 122 return fallback; 123 if (!strcasecmp(s, ".dts")) 124 return "dts"; 125 if (!strcasecmp(s, ".yaml")) 126 return "yaml"; 127 if (!strcasecmp(s, ".dtb")) 128 return "dtb"; 129 return fallback; 130 } 131 132 static const char *guess_input_format(const char *fname, const char *fallback) 133 { 134 struct stat statbuf; 135 fdt32_t magic; 136 FILE *f; 137 138 if (stat(fname, &statbuf) != 0) 139 return fallback; 140 141 if (S_ISDIR(statbuf.st_mode)) 142 return "fs"; 143 144 if (!S_ISREG(statbuf.st_mode)) 145 return fallback; 146 147 f = fopen(fname, "r"); 148 if (f == NULL) 149 return fallback; 150 if (fread(&magic, 4, 1, f) != 1) { 151 fclose(f); 152 return fallback; 153 } 154 fclose(f); 155 156 if (fdt32_to_cpu(magic) == FDT_MAGIC) 157 return "dtb"; 158 159 return guess_type_by_name(fname, fallback); 160 } 161 162 int main(int argc, char *argv[]) 163 { 164 struct dt_info *dti; 165 const char *inform = NULL; 166 const char *outform = NULL; 167 const char *outname = "-"; 168 const char *depname = NULL; 169 bool force = false, sort = false; 170 const char *arg; 171 int opt; 172 FILE *outf = NULL; 173 int outversion = DEFAULT_FDT_VERSION; 174 long long cmdline_boot_cpuid = -1; 175 176 quiet = 0; 177 reservenum = 0; 178 minsize = 0; 179 padsize = 0; 180 alignsize = 0; 181 182 while ((opt = util_getopt_long()) != EOF) { 183 switch (opt) { 184 case 'I': 185 inform = optarg; 186 break; 187 case 'O': 188 outform = optarg; 189 break; 190 case 'o': 191 outname = optarg; 192 break; 193 case 'V': 194 outversion = strtol(optarg, NULL, 0); 195 break; 196 case 'd': 197 depname = optarg; 198 break; 199 case 'R': 200 reservenum = strtol(optarg, NULL, 0); 201 break; 202 case 'S': 203 minsize = strtol(optarg, NULL, 0); 204 break; 205 case 'p': 206 padsize = strtol(optarg, NULL, 0); 207 break; 208 case 'a': 209 alignsize = strtol(optarg, NULL, 0); 210 if (!is_power_of_2(alignsize)) 211 die("Invalid argument \"%d\" to -a option\n", 212 alignsize); 213 break; 214 case 'f': 215 force = true; 216 break; 217 case 'q': 218 quiet++; 219 break; 220 case 'b': 221 cmdline_boot_cpuid = strtoll(optarg, NULL, 0); 222 break; 223 case 'i': 224 srcfile_add_search_path(optarg); 225 break; 226 case 'v': 227 util_version(); 228 case 'H': 229 if (streq(optarg, "legacy")) 230 phandle_format = PHANDLE_LEGACY; 231 else if (streq(optarg, "epapr")) 232 phandle_format = PHANDLE_EPAPR; 233 else if (streq(optarg, "both")) 234 phandle_format = PHANDLE_BOTH; 235 else 236 die("Invalid argument \"%s\" to -H option\n", 237 optarg); 238 break; 239 240 case 's': 241 sort = true; 242 break; 243 244 case 'W': 245 parse_checks_option(true, false, optarg); 246 break; 247 248 case 'E': 249 parse_checks_option(false, true, optarg); 250 break; 251 252 case '@': 253 generate_symbols = 1; 254 break; 255 case 'A': 256 auto_label_aliases = 1; 257 break; 258 case 'T': 259 annotate++; 260 break; 261 262 case 'h': 263 usage(NULL); 264 default: 265 usage("unknown option"); 266 } 267 } 268 269 if (argc > (optind+1)) 270 usage("missing files"); 271 else if (argc < (optind+1)) 272 arg = "-"; 273 else 274 arg = argv[optind]; 275 276 /* minsize and padsize are mutually exclusive */ 277 if (minsize && padsize) 278 die("Can't set both -p and -S\n"); 279 280 if (depname) { 281 depfile = fopen(depname, "w"); 282 if (!depfile) 283 die("Couldn't open dependency file %s: %s\n", depname, 284 strerror(errno)); 285 fprintf(depfile, "%s:", outname); 286 } 287 288 if (inform == NULL) 289 inform = guess_input_format(arg, "dts"); 290 if (outform == NULL) { 291 outform = guess_type_by_name(outname, NULL); 292 if (outform == NULL) { 293 if (streq(inform, "dts")) 294 outform = "dtb"; 295 else 296 outform = "dts"; 297 } 298 } 299 if (annotate && (!streq(inform, "dts") || !streq(outform, "dts"))) 300 die("--annotate requires -I dts -O dts\n"); 301 if (streq(inform, "dts")) 302 dti = dt_from_source(arg); 303 else if (streq(inform, "fs")) 304 dti = dt_from_fs(arg); 305 else if(streq(inform, "dtb")) 306 dti = dt_from_blob(arg); 307 else 308 die("Unknown input format \"%s\"\n", inform); 309 310 dti->outname = outname; 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, ""); 321 322 /* on a plugin, generate by default */ 323 if (dti->dtsflags & DTSF_PLUGIN) { 324 generate_fixups = 1; 325 } 326 327 process_checks(force, dti); 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 #ifndef NO_YAML 355 } else if (streq(outform, "yaml")) { 356 if (!streq(inform, "dts")) 357 die("YAML output format requires dts input format\n"); 358 dt_to_yaml(outf, dti); 359 #endif 360 } else if (streq(outform, "dtb")) { 361 dt_to_blob(outf, dti, outversion); 362 } else if (streq(outform, "asm")) { 363 dt_to_asm(outf, dti, outversion); 364 } else if (streq(outform, "null")) { 365 /* do nothing */ 366 } else { 367 die("Unknown output format \"%s\"\n", outform); 368 } 369 370 exit(0); 371 } 372
Indexes created Thu Jul 23 00:25:05 UTC 2026