xref: /openbmc/linux/scripts/dtc/dtc.c (revision b96fc2f3)
1 /*
2  * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
3  *
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation; either version 2 of the
8  * License, or (at your option) any later version.
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  *  General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License
16  *  along with this program; if not, write to the Free Software
17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
18  *                                                                   USA
19  */
20 
21 #include "dtc.h"
22 #include "srcpos.h"
23 
24 /*
25  * Command line options
26  */
27 int quiet;		/* Level of quietness */
28 int reservenum;		/* Number of memory reservation slots */
29 int minsize;		/* Minimum blob size */
30 int padsize;		/* Additional padding to blob */
31 int phandle_format = PHANDLE_BOTH;	/* Use linux,phandle or phandle properties */
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 #define FDT_VERSION(version)	_FDT_VERSION(version)
52 #define _FDT_VERSION(version)	#version
53 static const char usage_synopsis[] = "dtc [options] <input file>";
54 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv";
55 static struct option const usage_long_opts[] = {
56 	{"quiet",            no_argument, NULL, 'q'},
57 	{"in-format",         a_argument, NULL, 'I'},
58 	{"out",               a_argument, NULL, 'o'},
59 	{"out-format",        a_argument, NULL, 'O'},
60 	{"out-version",       a_argument, NULL, 'V'},
61 	{"out-dependency",    a_argument, NULL, 'd'},
62 	{"reserve",           a_argument, NULL, 'R'},
63 	{"space",             a_argument, NULL, 'S'},
64 	{"pad",               a_argument, NULL, 'p'},
65 	{"boot-cpu",          a_argument, NULL, 'b'},
66 	{"force",            no_argument, NULL, 'f'},
67 	{"include",           a_argument, NULL, 'i'},
68 	{"sort",             no_argument, NULL, 's'},
69 	{"phandle",           a_argument, NULL, 'H'},
70 	{"warning",           a_argument, NULL, 'W'},
71 	{"error",             a_argument, NULL, 'E'},
72 	{"help",             no_argument, NULL, 'h'},
73 	{"version",          no_argument, NULL, 'v'},
74 	{NULL,               no_argument, NULL, 0x0},
75 };
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",
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"
86 	 "\t\tasm - assembler source",
87 	"\n\tBlob version to produce, defaults to "FDT_VERSION(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
88 	"\n\tOutput dependency file",
89 	"\n\tMake space for <number> reserve map entries (for dtb and asm output)",
90 	"\n\tMake the blob at least <bytes> long (extra space)",
91 	"\n\tAdd padding to the blob of <bytes> long (extra space)",
92 	"\n\tSet the physical boot cpu",
93 	"\n\tTry to produce output even if the input tree has errors",
94 	"\n\tAdd a path to search for include files",
95 	"\n\tSort nodes and properties before outputting (useful for comparing trees)",
96 	"\n\tValid phandle formats are:\n"
97 	 "\t\tlegacy - \"linux,phandle\" properties only\n"
98 	 "\t\tepapr  - \"phandle\" properties only\n"
99 	 "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
100 	"\n\tEnable/disable warnings (prefix with \"no-\")",
101 	"\n\tEnable/disable errors (prefix with \"no-\")",
102 	"\n\tPrint this help and exit",
103 	"\n\tPrint version and exit",
104 	NULL,
105 };
106 
107 int main(int argc, char *argv[])
108 {
109 	struct boot_info *bi;
110 	const char *inform = "dts";
111 	const char *outform = "dts";
112 	const char *outname = "-";
113 	const char *depname = NULL;
114 	bool force = false, sort = false;
115 	const char *arg;
116 	int opt;
117 	FILE *outf = NULL;
118 	int outversion = DEFAULT_FDT_VERSION;
119 	long long cmdline_boot_cpuid = -1;
120 
121 	quiet      = 0;
122 	reservenum = 0;
123 	minsize    = 0;
124 	padsize    = 0;
125 
126 	while ((opt = util_getopt_long()) != EOF) {
127 		switch (opt) {
128 		case 'I':
129 			inform = optarg;
130 			break;
131 		case 'O':
132 			outform = optarg;
133 			break;
134 		case 'o':
135 			outname = optarg;
136 			break;
137 		case 'V':
138 			outversion = strtol(optarg, NULL, 0);
139 			break;
140 		case 'd':
141 			depname = optarg;
142 			break;
143 		case 'R':
144 			reservenum = strtol(optarg, NULL, 0);
145 			break;
146 		case 'S':
147 			minsize = strtol(optarg, NULL, 0);
148 			break;
149 		case 'p':
150 			padsize = strtol(optarg, NULL, 0);
151 			break;
152 		case 'f':
153 			force = true;
154 			break;
155 		case 'q':
156 			quiet++;
157 			break;
158 		case 'b':
159 			cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
160 			break;
161 		case 'i':
162 			srcfile_add_search_path(optarg);
163 			break;
164 		case 'v':
165 			util_version();
166 		case 'H':
167 			if (streq(optarg, "legacy"))
168 				phandle_format = PHANDLE_LEGACY;
169 			else if (streq(optarg, "epapr"))
170 				phandle_format = PHANDLE_EPAPR;
171 			else if (streq(optarg, "both"))
172 				phandle_format = PHANDLE_BOTH;
173 			else
174 				die("Invalid argument \"%s\" to -H option\n",
175 				    optarg);
176 			break;
177 
178 		case 's':
179 			sort = true;
180 			break;
181 
182 		case 'W':
183 			parse_checks_option(true, false, optarg);
184 			break;
185 
186 		case 'E':
187 			parse_checks_option(false, true, optarg);
188 			break;
189 
190 		case 'h':
191 			usage(NULL);
192 		default:
193 			usage("unknown option");
194 		}
195 	}
196 
197 	if (argc > (optind+1))
198 		usage("missing files");
199 	else if (argc < (optind+1))
200 		arg = "-";
201 	else
202 		arg = argv[optind];
203 
204 	/* minsize and padsize are mutually exclusive */
205 	if (minsize && padsize)
206 		die("Can't set both -p and -S\n");
207 
208 	if (depname) {
209 		depfile = fopen(depname, "w");
210 		if (!depfile)
211 			die("Couldn't open dependency file %s: %s\n", depname,
212 			    strerror(errno));
213 		fprintf(depfile, "%s:", outname);
214 	}
215 
216 	if (streq(inform, "dts"))
217 		bi = dt_from_source(arg);
218 	else if (streq(inform, "fs"))
219 		bi = dt_from_fs(arg);
220 	else if(streq(inform, "dtb"))
221 		bi = dt_from_blob(arg);
222 	else
223 		die("Unknown input format \"%s\"\n", inform);
224 
225 	if (depfile) {
226 		fputc('\n', depfile);
227 		fclose(depfile);
228 	}
229 
230 	if (cmdline_boot_cpuid != -1)
231 		bi->boot_cpuid_phys = cmdline_boot_cpuid;
232 
233 	fill_fullpaths(bi->dt, "");
234 	process_checks(force, bi);
235 
236 	if (sort)
237 		sort_tree(bi);
238 
239 	if (streq(outname, "-")) {
240 		outf = stdout;
241 	} else {
242 		outf = fopen(outname, "wb");
243 		if (! outf)
244 			die("Couldn't open output file %s: %s\n",
245 			    outname, strerror(errno));
246 	}
247 
248 	if (streq(outform, "dts")) {
249 		dt_to_source(outf, bi);
250 	} else if (streq(outform, "dtb")) {
251 		dt_to_blob(outf, bi, outversion);
252 	} else if (streq(outform, "asm")) {
253 		dt_to_asm(outf, bi, outversion);
254 	} else if (streq(outform, "null")) {
255 		/* do nothing */
256 	} else {
257 		die("Unknown output format \"%s\"\n", outform);
258 	}
259 
260 	exit(0);
261 }
262