summaryrefslogtreecommitdiff
path: root/scripts/dtc/dtc.c
blob: a4edf4c7aebfb368319041d2bf960a66490780e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
/*
 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *                                                                   USA
 */

#include <sys/stat.h>

#include "dtc.h"
#include "srcpos.h"

/*
 * Command line options
 */
int quiet;		/* Level of quietness */
int reservenum;		/* Number of memory reservation slots */
int minsize;		/* Minimum blob size */
int padsize;		/* Additional padding to blob */
int alignsize;		/* Additional padding to blob accroding to the alignsize */
int phandle_format = PHANDLE_BOTH;	/* Use linux,phandle or phandle properties */
int generate_symbols;	/* enable symbols & fixup support */
int generate_fixups;		/* suppress generation of fixups on symbol support */
int auto_label_aliases;		/* auto generate labels -> aliases */

static int is_power_of_2(int x)
{
	return (x > 0) && ((x & (x - 1)) == 0);
}

static void fill_fullpaths(struct node *tree, const char *prefix)
{
	struct node *child;
	const char *unit;

	tree->fullpath = join_path(prefix, tree->name);

	unit = strchr(tree->name, '@');
	if (unit)
		tree->basenamelen = unit - tree->name;
	else
		tree->basenamelen = strlen(tree->name);

	for_each_child(tree, child)
		fill_fullpaths(child, tree->fullpath);
}

/* Usage related data. */
#define FDT_VERSION(version)	_FDT_VERSION(version)
#define _FDT_VERSION(version)	#version
static const char usage_synopsis[] = "dtc [options] <input file>";
static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv";
static struct option const usage_long_opts[] = {
	{"quiet",            no_argument, NULL, 'q'},
	{"in-format",         a_argument, NULL, 'I'},
	{"out",               a_argument, NULL, 'o'},
	{"out-format",        a_argument, NULL, 'O'},
	{"out-version",       a_argument, NULL, 'V'},
	{"out-dependency",    a_argument, NULL, 'd'},
	{"reserve",           a_argument, NULL, 'R'},
	{"space",             a_argument, NULL, 'S'},
	{"pad",               a_argument, NULL, 'p'},
	{"align",             a_argument, NULL, 'a'},
	{"boot-cpu",          a_argument, NULL, 'b'},
	{"force",            no_argument, NULL, 'f'},
	{"include",           a_argument, NULL, 'i'},
	{"sort",             no_argument, NULL, 's'},
	{"phandle",           a_argument, NULL, 'H'},
	{"warning",           a_argument, NULL, 'W'},
	{"error",             a_argument, NULL, 'E'},
	{"symbols",	     no_argument, NULL, '@'},
	{"auto-alias",       no_argument, NULL, 'A'},
	{"help",             no_argument, NULL, 'h'},
	{"version",          no_argument, NULL, 'v'},
	{NULL,               no_argument, NULL, 0x0},
};
static const char * const usage_opts_help[] = {
	"\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
	"\n\tInput formats are:\n"
	 "\t\tdts - device tree source text\n"
	 "\t\tdtb - device tree blob\n"
	 "\t\tfs  - /proc/device-tree style directory",
	"\n\tOutput file",
	"\n\tOutput formats are:\n"
	 "\t\tdts - device tree source text\n"
	 "\t\tdtb - device tree blob\n"
	 "\t\tasm - assembler source",
	"\n\tBlob version to produce, defaults to "FDT_VERSION(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
	"\n\tOutput dependency file",
	"\n\tMake space for <number> reserve map entries (for dtb and asm output)",
	"\n\tMake the blob at least <bytes> long (extra space)",
	"\n\tAdd padding to the blob of <bytes> long (extra space)",
	"\n\tMake the blob align to the <bytes> (extra space)",
	"\n\tSet the physical boot cpu",
	"\n\tTry to produce output even if the input tree has errors",
	"\n\tAdd a path to search for include files",
	"\n\tSort nodes and properties before outputting (useful for comparing trees)",
	"\n\tValid phandle formats are:\n"
	 "\t\tlegacy - \"linux,phandle\" properties only\n"
	 "\t\tepapr  - \"phandle\" properties only\n"
	 "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
	"\n\tEnable/disable warnings (prefix with \"no-\")",
	"\n\tEnable/disable errors (prefix with \"no-\")",
	"\n\tEnable generation of symbols",
	"\n\tEnable auto-alias of labels",
	"\n\tPrint this help and exit",
	"\n\tPrint version and exit",
	NULL,
};

static const char *guess_type_by_name(const char *fname, const char *fallback)
{
	const char *s;

	s = strrchr(fname, '.');
	if (s == NULL)
		return fallback;
	if (!strcasecmp(s, ".dts"))
		return "dts";
	if (!strcasecmp(s, ".dtb"))
		return "dtb";
	return fallback;
}

static const char *guess_input_format(const char *fname, const char *fallback)
{
	struct stat statbuf;
	uint32_t magic;
	FILE *f;

	if (stat(fname, &statbuf) != 0)
		return fallback;

	if (S_ISDIR(statbuf.st_mode))
		return "fs";

	if (!S_ISREG(statbuf.st_mode))
		return fallback;

	f = fopen(fname, "r");
	if (f == NULL)
		return fallback;
	if (fread(&magic, 4, 1, f) != 1) {
		fclose(f);
		return fallback;
	}
	fclose(f);

	magic = fdt32_to_cpu(magic);
	if (magic == FDT_MAGIC)
		return "dtb";

	return guess_type_by_name(fname, fallback);
}

int main(int argc, char *argv[])
{
	struct dt_info *dti;
	const char *inform = NULL;
	const char *outform = NULL;
	const char *outname = "-";
	const char *depname = NULL;
	bool force = false, sort = false;
	const char *arg;
	int opt;
	FILE *outf = NULL;
	int outversion = DEFAULT_FDT_VERSION;
	long long cmdline_boot_cpuid = -1;

	quiet      = 0;
	reservenum = 0;
	minsize    = 0;
	padsize    = 0;
	alignsize  = 0;

	while ((opt = util_getopt_long()) != EOF) {
		switch (opt) {
		case 'I':
			inform = optarg;
			break;
		case 'O':
			outform = optarg;
			break;
		case 'o':
			outname = optarg;
			break;
		case 'V':
			outversion = strtol(optarg, NULL, 0);
			break;
		case 'd':
			depname = optarg;
			break;
		case 'R':
			reservenum = strtol(optarg, NULL, 0);
			break;
		case 'S':
			minsize = strtol(optarg, NULL, 0);
			break;
		case 'p':
			padsize = strtol(optarg, NULL, 0);
			break;
		case 'a':
			alignsize = strtol(optarg, NULL, 0);
			if (!is_power_of_2(alignsize))
				die("Invalid argument \"%d\" to -a option\n",
				    optarg);
			break;
		case 'f':
			force = true;
			break;
		case 'q':
			quiet++;
			break;
		case 'b':
			cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
			break;
		case 'i':
			srcfile_add_search_path(optarg);
			break;
		case 'v':
			util_version();
		case 'H':
			if (streq(optarg, "legacy"))
				phandle_format = PHANDLE_LEGACY;
			else if (streq(optarg, "epapr"))
				phandle_format = PHANDLE_EPAPR;
			else if (streq(optarg, "both"))
				phandle_format = PHANDLE_BOTH;
			else
				die("Invalid argument \"%s\" to -H option\n",
				    optarg);
			break;

		case 's':
			sort = true;
			break;

		case 'W':
			parse_checks_option(true, false, optarg);
			break;

		case 'E':
			parse_checks_option(false, true, optarg);
			break;

		case '@':
			generate_symbols = 1;
			break;
		case 'A':
			auto_label_aliases = 1;
			break;

		case 'h':
			usage(NULL);
		default:
			usage("unknown option");
		}
	}

	if (argc > (optind+1))
		usage("missing files");
	else if (argc < (optind+1))
		arg = "-";
	else
		arg = argv[optind];

	/* minsize and padsize are mutually exclusive */
	if (minsize && padsize)
		die("Can't set both -p and -S\n");

	if (depname) {
		depfile = fopen(depname, "w");
		if (!depfile)
			die("Couldn't open dependency file %s: %s\n", depname,
			    strerror(errno));
		fprintf(depfile, "%s:", outname);
	}

	if (inform == NULL)
		inform = guess_input_format(arg, "dts");
	if (outform == NULL) {
		outform = guess_type_by_name(outname, NULL);
		if (outform == NULL) {
			if (streq(inform, "dts"))
				outform = "dtb";
			else
				outform = "dts";
		}
	}
	if (streq(inform, "dts"))
		dti = dt_from_source(arg);
	else if (streq(inform, "fs"))
		dti = dt_from_fs(arg);
	else if(streq(inform, "dtb"))
		dti = dt_from_blob(arg);
	else
		die("Unknown input format \"%s\"\n", inform);

	if (depfile) {
		fputc('\n', depfile);
		fclose(depfile);
	}

	if (cmdline_boot_cpuid != -1)
		dti->boot_cpuid_phys = cmdline_boot_cpuid;

	fill_fullpaths(dti->dt, "");
	process_checks(force, dti);

	/* on a plugin, generate by default */
	if (dti->dtsflags & DTSF_PLUGIN) {
		generate_fixups = 1;
	}

	if (auto_label_aliases)
		generate_label_tree(dti, "aliases", false);

	if (generate_symbols)
		generate_label_tree(dti, "__symbols__", true);

	if (generate_fixups) {
		generate_fixups_tree(dti, "__fixups__");
		generate_local_fixups_tree(dti, "__local_fixups__");
	}

	if (sort)
		sort_tree(dti);

	if (streq(outname, "-")) {
		outf = stdout;
	} else {
		outf = fopen(outname, "wb");
		if (! outf)
			die("Couldn't open output file %s: %s\n",
			    outname, strerror(errno));
	}

	if (streq(outform, "dts")) {
		dt_to_source(outf, dti);
	} else if (streq(outform, "dtb")) {
		dt_to_blob(outf, dti, outversion);
	} else if (streq(outform, "asm")) {
		dt_to_asm(outf, dti, outversion);
	} else if (streq(outform, "null")) {
		/* do nothing */
	} else {
		die("Unknown output format \"%s\"\n", outform);
	}

	exit(0);
}