1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
12 * Command line options
14 int quiet; /* Level of quietness */
15 unsigned int reservenum;/* Number of memory reservation slots */
16 int minsize; /* Minimum blob size */
17 int padsize; /* Additional padding to blob */
18 int alignsize; /* Additional padding to blob accroding to the alignsize */
19 int phandle_format = PHANDLE_EPAPR; /* Use linux,phandle or phandle properties */
20 int generate_symbols; /* enable symbols & fixup support */
21 int generate_fixups; /* suppress generation of fixups on symbol support */
22 int auto_label_aliases; /* auto generate labels -> aliases */
23 int annotate; /* Level of annotation: 1 for input source location
24 >1 for full input source location. */
26 static int is_power_of_2(int x)
28 return (x > 0) && ((x & (x - 1)) == 0);
31 static void fill_fullpaths(struct node *tree, const char *prefix)
36 tree->fullpath = join_path(prefix, tree->name);
38 unit = strchr(tree->name, '@');
40 tree->basenamelen = unit - tree->name;
42 tree->basenamelen = strlen(tree->name);
44 for_each_child(tree, child)
45 fill_fullpaths(child, tree->fullpath);
48 /* Usage related data. */
49 static const char usage_synopsis[] = "dtc [options] <input file>";
50 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@AThv";
51 static struct option const usage_long_opts[] = {
52 {"quiet", no_argument, NULL, 'q'},
53 {"in-format", a_argument, NULL, 'I'},
54 {"out", a_argument, NULL, 'o'},
55 {"out-format", a_argument, NULL, 'O'},
56 {"out-version", a_argument, NULL, 'V'},
57 {"out-dependency", a_argument, NULL, 'd'},
58 {"reserve", a_argument, NULL, 'R'},
59 {"space", a_argument, NULL, 'S'},
60 {"pad", a_argument, NULL, 'p'},
61 {"align", a_argument, NULL, 'a'},
62 {"boot-cpu", a_argument, NULL, 'b'},
63 {"force", no_argument, NULL, 'f'},
64 {"include", a_argument, NULL, 'i'},
65 {"sort", no_argument, NULL, 's'},
66 {"phandle", a_argument, NULL, 'H'},
67 {"warning", a_argument, NULL, 'W'},
68 {"error", a_argument, NULL, 'E'},
69 {"symbols", no_argument, NULL, '@'},
70 {"auto-alias", no_argument, NULL, 'A'},
71 {"annotate", no_argument, NULL, 'T'},
72 {"help", no_argument, NULL, 'h'},
73 {"version", no_argument, NULL, 'v'},
74 {NULL, no_argument, NULL, 0x0},
76 static const char * const usage_opts_help[] = {
77 "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
78 "\n\tInput formats are:\n"
79 "\t\tdts - device tree source text\n"
80 "\t\tdtb - device tree blob\n"
81 "\t\tfs - /proc/device-tree style directory",
83 "\n\tOutput formats are:\n"
84 "\t\tdts - device tree source text\n"
85 "\t\tdtb - device tree blob\n"
87 "\t\tyaml - device tree encoded as YAML\n"
89 "\t\tasm - assembler source",
90 "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
91 "\n\tOutput dependency file",
92 "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
93 "\n\tMake the blob at least <bytes> long (extra space)",
94 "\n\tAdd padding to the blob of <bytes> long (extra space)",
95 "\n\tMake the blob align to the <bytes> (extra space)",
96 "\n\tSet the physical boot cpu",
97 "\n\tTry to produce output even if the input tree has errors",
98 "\n\tAdd a path to search for include files",
99 "\n\tSort nodes and properties before outputting (useful for comparing trees)",
100 "\n\tValid phandle formats are:\n"
101 "\t\tlegacy - \"linux,phandle\" properties only\n"
102 "\t\tepapr - \"phandle\" properties only\n"
103 "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties",
104 "\n\tEnable/disable warnings (prefix with \"no-\")",
105 "\n\tEnable/disable errors (prefix with \"no-\")",
106 "\n\tEnable generation of symbols",
107 "\n\tEnable auto-alias of labels",
108 "\n\tAnnotate output .dts with input source file and line (-T -T for more details)",
109 "\n\tPrint this help and exit",
110 "\n\tPrint version and exit",
114 static const char *guess_type_by_name(const char *fname, const char *fallback)
118 s = strrchr(fname, '.');
121 if (!strcasecmp(s, ".dts"))
123 if (!strcasecmp(s, ".yaml"))
125 if (!strcasecmp(s, ".dtbo"))
127 if (!strcasecmp(s, ".dtb"))
132 static const char *guess_input_format(const char *fname, const char *fallback)
138 if (stat(fname, &statbuf) != 0)
141 if (S_ISDIR(statbuf.st_mode))
144 if (!S_ISREG(statbuf.st_mode))
147 f = fopen(fname, "r");
150 if (fread(&magic, 4, 1, f) != 1) {
156 if (fdt32_to_cpu(magic) == FDT_MAGIC)
159 return guess_type_by_name(fname, fallback);
162 int main(int argc, char *argv[])
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;
173 int outversion = DEFAULT_FDT_VERSION;
174 long long cmdline_boot_cpuid = -1;
182 while ((opt = util_getopt_long()) != EOF) {
194 outversion = strtol(optarg, NULL, 0);
200 reservenum = strtoul(optarg, NULL, 0);
203 minsize = strtol(optarg, NULL, 0);
206 padsize = strtol(optarg, NULL, 0);
209 alignsize = strtol(optarg, NULL, 0);
210 if (!is_power_of_2(alignsize))
211 die("Invalid argument \"%d\" to -a option\n",
221 cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
224 srcfile_add_search_path(optarg);
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;
236 die("Invalid argument \"%s\" to -H option\n",
245 parse_checks_option(true, false, optarg);
249 parse_checks_option(false, true, optarg);
253 generate_symbols = 1;
256 auto_label_aliases = 1;
265 usage("unknown option");
269 if (argc > (optind+1))
270 usage("missing files");
271 else if (argc < (optind+1))
276 /* minsize and padsize are mutually exclusive */
277 if (minsize && padsize)
278 die("Can't set both -p and -S\n");
281 depfile = fopen(depname, "w");
283 die("Couldn't open dependency file %s: %s\n", depname,
285 fprintf(depfile, "%s:", outname);
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"))
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);
308 die("Unknown input format \"%s\"\n", inform);
310 dti->outname = outname;
313 fputc('\n', depfile);
317 if (cmdline_boot_cpuid != -1)
318 dti->boot_cpuid_phys = cmdline_boot_cpuid;
320 fill_fullpaths(dti->dt, "");
322 /* on a plugin, generate by default */
323 if (dti->dtsflags & DTSF_PLUGIN) {
327 process_checks(force, dti);
329 if (auto_label_aliases)
330 generate_label_tree(dti, "aliases", false);
332 if (generate_symbols)
333 generate_label_tree(dti, "__symbols__", true);
335 if (generate_fixups) {
336 generate_fixups_tree(dti, "__fixups__");
337 generate_local_fixups_tree(dti, "__local_fixups__");
343 if (streq(outname, "-")) {
346 outf = fopen(outname, "wb");
348 die("Couldn't open output file %s: %s\n",
349 outname, strerror(errno));
352 if (streq(outform, "dts")) {
353 dt_to_source(outf, dti);
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);
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")) {
367 die("Unknown output format \"%s\"\n", outform);