1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6#include <sys/stat.h>
7
8#include "dtc.h"
9#include "srcpos.h"
10
11/*
12 * Command line options
13 */
14int quiet; /* Level of quietness */
15unsigned int reservenum;/* Number of memory reservation slots */
16int minsize; /* Minimum blob size */
17int padsize; /* Additional padding to blob */
18int alignsize; /* Additional padding to blob accroding to the alignsize */
19int phandle_format = PHANDLE_EPAPR; /* Use linux,phandle or phandle properties */
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 */
23int annotate; /* Level of annotation: 1 for input source location
24 >1 for full input source location. */
25
26static int is_power_of_2(int x)
27{
28 return (x > 0) && ((x & (x - 1)) == 0);
29}
30
31static void fill_fullpaths(struct node *tree, const char *prefix)
32{
33 struct node *child;
34 const char *unit;
35
36 tree->fullpath = join_path(path: prefix, name: tree->name);
37
38 unit = strchr(s: tree->name, c: '@');
39 if (unit)
40 tree->basenamelen = unit - tree->name;
41 else
42 tree->basenamelen = strlen(s: tree->name);
43
44 for_each_child(tree, child)
45 fill_fullpaths(tree: child, prefix: tree->fullpath);
46}
47
48/* Usage related data. */
49static const char usage_synopsis[] = "dtc [options] <input file>";
50static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@LAThv";
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'},
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 {"local-fixups", no_argument, NULL, 'L'},
71 {"auto-alias", no_argument, NULL, 'A'},
72 {"annotate", no_argument, NULL, 'T'},
73 {"help", no_argument, NULL, 'h'},
74 {"version", no_argument, NULL, 'v'},
75 {NULL, no_argument, NULL, 0x0},
76};
77static const char * const usage_opts_help[] = {
78 "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
79 "\n\tInput formats are:\n"
80 "\t\tdts - device tree source text\n"
81 "\t\tdtb - device tree blob\n"
82 "\t\tfs - /proc/device-tree style directory",
83 "\n\tOutput file",
84 "\n\tOutput formats are:\n"
85 "\t\tdts - device tree source text\n"
86 "\t\tdtb - device tree blob\n"
87#ifndef NO_YAML
88 "\t\tyaml - device tree encoded as YAML\n"
89#endif
90 "\t\tasm - assembler source",
91 "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
92 "\n\tOutput dependency file",
93 "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
94 "\n\tMake the blob at least <bytes> long (extra space)",
95 "\n\tAdd padding to the blob of <bytes> long (extra space)",
96 "\n\tMake the blob align to the <bytes> (extra space)",
97 "\n\tSet the physical boot cpu",
98 "\n\tTry to produce output even if the input tree has errors",
99 "\n\tAdd a path to search for include files",
100 "\n\tSort nodes and properties before outputting (useful for comparing trees)",
101 "\n\tValid phandle formats are:\n"
102 "\t\tlegacy - \"linux,phandle\" properties only\n"
103 "\t\tepapr - \"phandle\" properties only\n"
104 "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties",
105 "\n\tEnable/disable warnings (prefix with \"no-\")",
106 "\n\tEnable/disable errors (prefix with \"no-\")",
107 "\n\tEnable generation of symbols",
108 "\n\tPossibly generates a __local_fixups__ and a __fixups__ node at the root node",
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
116static const char *guess_type_by_name(const char *fname, const char *fallback)
117{
118 const char *s;
119
120 s = strrchr(s: fname, c: '.');
121 if (s == NULL)
122 return fallback;
123 if (!strcasecmp(s1: s, s2: ".dts"))
124 return "dts";
125 if (!strcasecmp(s1: s, s2: ".yaml"))
126 return "yaml";
127 if (!strcasecmp(s1: s, s2: ".dtbo"))
128 return "dtb";
129 if (!strcasecmp(s1: s, s2: ".dtb"))
130 return "dtb";
131 return fallback;
132}
133
134static const char *guess_input_format(const char *fname, const char *fallback)
135{
136 struct stat statbuf;
137 fdt32_t magic;
138 FILE *f;
139
140 if (stat(file: fname, buf: &statbuf) != 0)
141 return fallback;
142
143 if (S_ISDIR(statbuf.st_mode))
144 return "fs";
145
146 if (!S_ISREG(statbuf.st_mode))
147 return fallback;
148
149 f = fopen(filename: fname, modes: "r");
150 if (f == NULL)
151 return fallback;
152 if (fread(ptr: &magic, size: 4, n: 1, stream: f) != 1) {
153 fclose(stream: f);
154 return fallback;
155 }
156 fclose(stream: f);
157
158 if (fdt32_to_cpu(magic) == FDT_MAGIC)
159 return "dtb";
160
161 return guess_type_by_name(fname, fallback);
162}
163
164int main(int argc, char *argv[])
165{
166 struct dt_info *dti;
167 const char *inform = NULL;
168 const char *outform = NULL;
169 const char *outname = "-";
170 const char *depname = NULL;
171 bool force = false, sort = false;
172 const char *arg;
173 int opt;
174 FILE *outf = NULL;
175 int outversion = DEFAULT_FDT_VERSION;
176 long long cmdline_boot_cpuid = -1;
177
178 quiet = 0;
179 reservenum = 0;
180 minsize = 0;
181 padsize = 0;
182 alignsize = 0;
183
184 while ((opt = util_getopt_long()) != EOF) {
185 switch (opt) {
186 case 'I':
187 inform = optarg;
188 break;
189 case 'O':
190 outform = optarg;
191 break;
192 case 'o':
193 outname = optarg;
194 break;
195 case 'V':
196 outversion = strtol(nptr: optarg, NULL, base: 0);
197 break;
198 case 'd':
199 depname = optarg;
200 break;
201 case 'R':
202 reservenum = strtoul(nptr: optarg, NULL, base: 0);
203 break;
204 case 'S':
205 minsize = strtol(nptr: optarg, NULL, base: 0);
206 break;
207 case 'p':
208 padsize = strtol(nptr: optarg, NULL, base: 0);
209 break;
210 case 'a':
211 alignsize = strtol(nptr: optarg, NULL, base: 0);
212 if (!is_power_of_2(x: alignsize))
213 die(str: "Invalid argument \"%d\" to -a option\n",
214 alignsize);
215 break;
216 case 'f':
217 force = true;
218 break;
219 case 'q':
220 quiet++;
221 break;
222 case 'b':
223 cmdline_boot_cpuid = strtoll(nptr: optarg, NULL, base: 0);
224 break;
225 case 'i':
226 srcfile_add_search_path(dirname: optarg);
227 break;
228 case 'v':
229 util_version();
230 case 'H':
231 if (streq(optarg, "legacy"))
232 phandle_format = PHANDLE_LEGACY;
233 else if (streq(optarg, "epapr"))
234 phandle_format = PHANDLE_EPAPR;
235 else if (streq(optarg, "both"))
236 phandle_format = PHANDLE_BOTH;
237 else
238 die(str: "Invalid argument \"%s\" to -H option\n",
239 optarg);
240 break;
241
242 case 's':
243 sort = true;
244 break;
245
246 case 'W':
247 parse_checks_option(true, false, arg: optarg);
248 break;
249
250 case 'E':
251 parse_checks_option(false, true, arg: optarg);
252 break;
253
254 case '@':
255 generate_symbols = 1;
256 break;
257
258 case 'L':
259 generate_fixups = 1;
260 break;
261
262 case 'A':
263 auto_label_aliases = 1;
264 break;
265 case 'T':
266 annotate++;
267 break;
268
269 case 'h':
270 usage(NULL);
271 default:
272 usage("unknown option");
273 }
274 }
275
276 if (argc > (optind+1))
277 usage("missing files");
278 else if (argc < (optind+1))
279 arg = "-";
280 else
281 arg = argv[optind];
282
283 /* minsize and padsize are mutually exclusive */
284 if (minsize && padsize)
285 die(str: "Can't set both -p and -S\n");
286
287 if (depname) {
288 depfile = fopen(filename: depname, modes: "w");
289 if (!depfile)
290 die(str: "Couldn't open dependency file %s: %s\n", depname,
291 strerror(errno));
292 fprintf(stream: depfile, format: "%s:", outname);
293 }
294
295 if (inform == NULL)
296 inform = guess_input_format(fname: arg, fallback: "dts");
297 if (outform == NULL) {
298 outform = guess_type_by_name(fname: outname, NULL);
299 if (outform == NULL) {
300 if (streq(inform, "dts"))
301 outform = "dtb";
302 else
303 outform = "dts";
304 }
305 }
306 if (annotate && (!streq(inform, "dts") || !streq(outform, "dts")))
307 die(str: "--annotate requires -I dts -O dts\n");
308 if (streq(inform, "dts"))
309 dti = dt_from_source(f: arg);
310 else if (streq(inform, "fs"))
311 dti = dt_from_fs(dirname: arg);
312 else if(streq(inform, "dtb"))
313 dti = dt_from_blob(fname: arg);
314 else
315 die(str: "Unknown input format \"%s\"\n", inform);
316
317 dti->outname = outname;
318
319 if (depfile) {
320 fputc(c: '\n', stream: depfile);
321 fclose(stream: depfile);
322 }
323
324 if (cmdline_boot_cpuid != -1)
325 dti->boot_cpuid_phys = cmdline_boot_cpuid;
326
327 fill_fullpaths(tree: dti->dt, prefix: "");
328
329 /* on a plugin, generate by default */
330 if (dti->dtsflags & DTSF_PLUGIN) {
331 generate_fixups = 1;
332 }
333
334 process_checks(force, dti);
335
336 if (auto_label_aliases)
337 generate_label_tree(dti, name: "aliases", false);
338
339 if (generate_symbols)
340 generate_label_tree(dti, name: "__symbols__", true);
341
342 if (generate_fixups) {
343 generate_fixups_tree(dti, name: "__fixups__");
344 generate_local_fixups_tree(dti, name: "__local_fixups__");
345 }
346
347 if (sort)
348 sort_tree(dti);
349
350 if (streq(outname, "-")) {
351 outf = stdout;
352 } else {
353 outf = fopen(filename: outname, modes: "wb");
354 if (! outf)
355 die(str: "Couldn't open output file %s: %s\n",
356 outname, strerror(errno));
357 }
358
359 if (streq(outform, "dts")) {
360 dt_to_source(f: outf, dti);
361#ifndef NO_YAML
362 } else if (streq(outform, "yaml")) {
363 if (!streq(inform, "dts"))
364 die("YAML output format requires dts input format\n");
365 dt_to_yaml(outf, dti);
366#endif
367 } else if (streq(outform, "dtb")) {
368 dt_to_blob(f: outf, dti, version: outversion);
369 } else if (streq(outform, "asm")) {
370 dt_to_asm(f: outf, dti, version: outversion);
371 } else if (streq(outform, "null")) {
372 /* do nothing */
373 } else {
374 die(str: "Unknown output format \"%s\"\n", outform);
375 }
376
377 exit(status: 0);
378}
379

source code of linux/scripts/dtc/dtc.c