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1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
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2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
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4 */
5
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6#include <sys/stat.h>
7
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8#include "dtc.h"
9#include "srcpos.h"
10
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11/*
12 * Command line options
13 */
14int quiet; /* Level of quietness */
15int reservenum; /* Number of memory reservation slots */
16int minsize; /* Minimum blob size */
17int padsize; /* Additional padding to blob */
6f05afcb 18int alignsize; /* Additional padding to blob accroding to the alignsize */
4201d057 19int phandle_format = PHANDLE_EPAPR; /* Use linux,phandle or phandle properties */
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20int generate_symbols; /* enable symbols & fixup support */
21int generate_fixups; /* suppress generation of fixups on symbol support */
22int auto_label_aliases; /* auto generate labels -> aliases */
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23int annotate; /* Level of annotation: 1 for input source location
24 >1 for full input source location. */
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25
26static int is_power_of_2(int x)
27{
28 return (x > 0) && ((x & (x - 1)) == 0);
29}
a4da2e3e 30
ed95d745 31static void fill_fullpaths(struct node *tree, const char *prefix)
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32{
33 struct node *child;
34 const char *unit;
35
36 tree->fullpath = join_path(prefix, tree->name);
37
38 unit = strchr(tree->name, '@');
39 if (unit)
40 tree->basenamelen = unit - tree->name;
41 else
42 tree->basenamelen = strlen(tree->name);
43
44 for_each_child(tree, child)
45 fill_fullpaths(child, tree->fullpath);
46}
47
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48/* Usage related data. */
49static const char usage_synopsis[] = "dtc [options] <input file>";
c2e7075c 50static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@AThv";
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51static 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'},
6f05afcb 61 {"align", a_argument, NULL, 'a'},
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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'},
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69 {"symbols", no_argument, NULL, '@'},
70 {"auto-alias", no_argument, NULL, 'A'},
c2e7075c 71 {"annotate", no_argument, NULL, 'T'},
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72 {"help", no_argument, NULL, 'h'},
73 {"version", no_argument, NULL, 'v'},
74 {NULL, no_argument, NULL, 0x0},
75};
76static 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",
82 "\n\tOutput file",
83 "\n\tOutput formats are:\n"
84 "\t\tdts - device tree source text\n"
85 "\t\tdtb - device tree blob\n"
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86#ifndef NO_YAML
87 "\t\tyaml - device tree encoded as YAML\n"
88#endif
73ab39b1 89 "\t\tasm - assembler source",
9130ba88 90 "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
73ab39b1 91 "\n\tOutput dependency file",
47605971 92 "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
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93 "\n\tMake the blob at least <bytes> long (extra space)",
94 "\n\tAdd padding to the blob of <bytes> long (extra space)",
6f05afcb 95 "\n\tMake the blob align to the <bytes> (extra space)",
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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-\")",
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106 "\n\tEnable generation of symbols",
107 "\n\tEnable auto-alias of labels",
c2e7075c 108 "\n\tAnnotate output .dts with input source file and line (-T -T for more details)",
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109 "\n\tPrint this help and exit",
110 "\n\tPrint version and exit",
111 NULL,
112};
a4da2e3e 113
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114static const char *guess_type_by_name(const char *fname, const char *fallback)
115{
116 const char *s;
117
118 s = strrchr(fname, '.');
119 if (s == NULL)
120 return fallback;
121 if (!strcasecmp(s, ".dts"))
122 return "dts";
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123 if (!strcasecmp(s, ".yaml"))
124 return "yaml";
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125 if (!strcasecmp(s, ".dtb"))
126 return "dtb";
127 return fallback;
128}
129
130static const char *guess_input_format(const char *fname, const char *fallback)
131{
132 struct stat statbuf;
89d12310 133 fdt32_t magic;
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134 FILE *f;
135
136 if (stat(fname, &statbuf) != 0)
137 return fallback;
138
139 if (S_ISDIR(statbuf.st_mode))
140 return "fs";
141
142 if (!S_ISREG(statbuf.st_mode))
143 return fallback;
144
145 f = fopen(fname, "r");
146 if (f == NULL)
147 return fallback;
148 if (fread(&magic, 4, 1, f) != 1) {
149 fclose(f);
150 return fallback;
151 }
152 fclose(f);
153
89d12310 154 if (fdt32_to_cpu(magic) == FDT_MAGIC)
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155 return "dtb";
156
157 return guess_type_by_name(fname, fallback);
158}
159
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160int main(int argc, char *argv[])
161{
6f05afcb 162 struct dt_info *dti;
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163 const char *inform = NULL;
164 const char *outform = NULL;
a4da2e3e 165 const char *outname = "-";
136ec204 166 const char *depname = NULL;
47605971 167 bool force = false, sort = false;
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168 const char *arg;
169 int opt;
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170 FILE *outf = NULL;
171 int outversion = DEFAULT_FDT_VERSION;
ed95d745 172 long long cmdline_boot_cpuid = -1;
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173
174 quiet = 0;
175 reservenum = 0;
176 minsize = 0;
177 padsize = 0;
6f05afcb 178 alignsize = 0;
a4da2e3e 179
73ab39b1 180 while ((opt = util_getopt_long()) != EOF) {
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181 switch (opt) {
182 case 'I':
183 inform = optarg;
184 break;
185 case 'O':
186 outform = optarg;
187 break;
188 case 'o':
189 outname = optarg;
190 break;
191 case 'V':
192 outversion = strtol(optarg, NULL, 0);
193 break;
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194 case 'd':
195 depname = optarg;
196 break;
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197 case 'R':
198 reservenum = strtol(optarg, NULL, 0);
199 break;
200 case 'S':
201 minsize = strtol(optarg, NULL, 0);
202 break;
203 case 'p':
204 padsize = strtol(optarg, NULL, 0);
205 break;
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206 case 'a':
207 alignsize = strtol(optarg, NULL, 0);
208 if (!is_power_of_2(alignsize))
209 die("Invalid argument \"%d\" to -a option\n",
89d12310 210 alignsize);
6f05afcb 211 break;
a4da2e3e 212 case 'f':
47605971 213 force = true;
a4da2e3e 214 break;
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215 case 'q':
216 quiet++;
217 break;
218 case 'b':
ed95d745 219 cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
a4da2e3e 220 break;
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221 case 'i':
222 srcfile_add_search_path(optarg);
223 break;
a4da2e3e 224 case 'v':
73ab39b1 225 util_version();
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226 case 'H':
227 if (streq(optarg, "legacy"))
228 phandle_format = PHANDLE_LEGACY;
229 else if (streq(optarg, "epapr"))
230 phandle_format = PHANDLE_EPAPR;
231 else if (streq(optarg, "both"))
232 phandle_format = PHANDLE_BOTH;
233 else
234 die("Invalid argument \"%s\" to -H option\n",
235 optarg);
236 break;
237
238 case 's':
47605971 239 sort = true;
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240 break;
241
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242 case 'W':
243 parse_checks_option(true, false, optarg);
244 break;
245
246 case 'E':
247 parse_checks_option(false, true, optarg);
248 break;
249
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250 case '@':
251 generate_symbols = 1;
252 break;
253 case 'A':
254 auto_label_aliases = 1;
255 break;
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256 case 'T':
257 annotate++;
258 break;
6f05afcb 259
a4da2e3e 260 case 'h':
73ab39b1 261 usage(NULL);
a4da2e3e 262 default:
73ab39b1 263 usage("unknown option");
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264 }
265 }
266
267 if (argc > (optind+1))
73ab39b1 268 usage("missing files");
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269 else if (argc < (optind+1))
270 arg = "-";
271 else
272 arg = argv[optind];
273
274 /* minsize and padsize are mutually exclusive */
ed95d745 275 if (minsize && padsize)
a4da2e3e 276 die("Can't set both -p and -S\n");
a4da2e3e 277
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278 if (depname) {
279 depfile = fopen(depname, "w");
280 if (!depfile)
281 die("Couldn't open dependency file %s: %s\n", depname,
282 strerror(errno));
283 fprintf(depfile, "%s:", outname);
284 }
285
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286 if (inform == NULL)
287 inform = guess_input_format(arg, "dts");
288 if (outform == NULL) {
289 outform = guess_type_by_name(outname, NULL);
290 if (outform == NULL) {
291 if (streq(inform, "dts"))
292 outform = "dtb";
293 else
294 outform = "dts";
295 }
296 }
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297 if (annotate && (!streq(inform, "dts") || !streq(outform, "dts")))
298 die("--annotate requires -I dts -O dts\n");
ed95d745 299 if (streq(inform, "dts"))
6f05afcb 300 dti = dt_from_source(arg);
ed95d745 301 else if (streq(inform, "fs"))
6f05afcb 302 dti = dt_from_fs(arg);
ed95d745 303 else if(streq(inform, "dtb"))
6f05afcb 304 dti = dt_from_blob(arg);
ed95d745 305 else
a4da2e3e 306 die("Unknown input format \"%s\"\n", inform);
a4da2e3e 307
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308 dti->outname = outname;
309
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310 if (depfile) {
311 fputc('\n', depfile);
312 fclose(depfile);
313 }
314
ed95d745 315 if (cmdline_boot_cpuid != -1)
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316 dti->boot_cpuid_phys = cmdline_boot_cpuid;
317
318 fill_fullpaths(dti->dt, "");
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319
320 /* on a plugin, generate by default */
321 if (dti->dtsflags & DTSF_PLUGIN) {
322 generate_fixups = 1;
323 }
a4da2e3e 324
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325 process_checks(force, dti);
326
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327 if (auto_label_aliases)
328 generate_label_tree(dti, "aliases", false);
329
330 if (generate_symbols)
331 generate_label_tree(dti, "__symbols__", true);
332
333 if (generate_fixups) {
334 generate_fixups_tree(dti, "__fixups__");
335 generate_local_fixups_tree(dti, "__local_fixups__");
336 }
a4da2e3e 337
658f29a5 338 if (sort)
6f05afcb 339 sort_tree(dti);
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340
341 if (streq(outname, "-")) {
342 outf = stdout;
343 } else {
47605971 344 outf = fopen(outname, "wb");
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345 if (! outf)
346 die("Couldn't open output file %s: %s\n",
347 outname, strerror(errno));
348 }
349
350 if (streq(outform, "dts")) {
6f05afcb 351 dt_to_source(outf, dti);
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352#ifndef NO_YAML
353 } else if (streq(outform, "yaml")) {
354 if (!streq(inform, "dts"))
355 die("YAML output format requires dts input format\n");
356 dt_to_yaml(outf, dti);
357#endif
a4da2e3e 358 } else if (streq(outform, "dtb")) {
6f05afcb 359 dt_to_blob(outf, dti, outversion);
a4da2e3e 360 } else if (streq(outform, "asm")) {
6f05afcb 361 dt_to_asm(outf, dti, outversion);
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362 } else if (streq(outform, "null")) {
363 /* do nothing */
364 } else {
365 die("Unknown output format \"%s\"\n", outform);
366 }
367
368 exit(0);
369}