xref: /openbmc/linux/scripts/dtc/dtc.c (revision 275876e2)
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 static const char usage_synopsis[] = "dtc [options] <input file>";
52 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:fb:i:H:sW:E:hv";
53 static struct option const usage_long_opts[] = {
54 	{"quiet",            no_argument, NULL, 'q'},
55 	{"in-format",         a_argument, NULL, 'I'},
56 	{"out",               a_argument, NULL, 'o'},
57 	{"out-format",        a_argument, NULL, 'O'},
58 	{"out-version",       a_argument, NULL, 'V'},
59 	{"out-dependency",    a_argument, NULL, 'd'},
60 	{"reserve",           a_argument, NULL, 'R'},
61 	{"space",             a_argument, NULL, 'S'},
62 	{"pad",               a_argument, NULL, 'p'},
63 	{"boot-cpu",          a_argument, NULL, 'b'},
64 	{"force",            no_argument, NULL, 'f'},
65 	{"include",           a_argument, NULL, 'i'},
66 	{"sort",             no_argument, NULL, 's'},
67 	{"phandle",           a_argument, NULL, 'H'},
68 	{"warning",           a_argument, NULL, 'W'},
69 	{"error",             a_argument, NULL, 'E'},
70 	{"help",             no_argument, NULL, 'h'},
71 	{"version",          no_argument, NULL, 'v'},
72 	{NULL,               no_argument, NULL, 0x0},
73 };
74 static const char * const usage_opts_help[] = {
75 	"\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
76 	"\n\tInput formats are:\n"
77 	 "\t\tdts - device tree source text\n"
78 	 "\t\tdtb - device tree blob\n"
79 	 "\t\tfs  - /proc/device-tree style directory",
80 	"\n\tOutput file",
81 	"\n\tOutput formats are:\n"
82 	 "\t\tdts - device tree source text\n"
83 	 "\t\tdtb - device tree blob\n"
84 	 "\t\tasm - assembler source",
85 	"\n\tBlob version to produce, defaults to %d (for dtb and asm output)", //, DEFAULT_FDT_VERSION);
86 	"\n\tOutput dependency file",
87 	"\n\ttMake space for <number> reserve map entries (for dtb and asm output)",
88 	"\n\tMake the blob at least <bytes> long (extra space)",
89 	"\n\tAdd padding to the blob of <bytes> long (extra space)",
90 	"\n\tSet the physical boot cpu",
91 	"\n\tTry to produce output even if the input tree has errors",
92 	"\n\tAdd a path to search for include files",
93 	"\n\tSort nodes and properties before outputting (useful for comparing trees)",
94 	"\n\tValid phandle formats are:\n"
95 	 "\t\tlegacy - \"linux,phandle\" properties only\n"
96 	 "\t\tepapr  - \"phandle\" properties only\n"
97 	 "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
98 	"\n\tEnable/disable warnings (prefix with \"no-\")",
99 	"\n\tEnable/disable errors (prefix with \"no-\")",
100 	"\n\tPrint this help and exit",
101 	"\n\tPrint version and exit",
102 	NULL,
103 };
104 
105 int main(int argc, char *argv[])
106 {
107 	struct boot_info *bi;
108 	const char *inform = "dts";
109 	const char *outform = "dts";
110 	const char *outname = "-";
111 	const char *depname = NULL;
112 	int force = 0, sort = 0;
113 	const char *arg;
114 	int opt;
115 	FILE *outf = NULL;
116 	int outversion = DEFAULT_FDT_VERSION;
117 	long long cmdline_boot_cpuid = -1;
118 
119 	quiet      = 0;
120 	reservenum = 0;
121 	minsize    = 0;
122 	padsize    = 0;
123 
124 	while ((opt = util_getopt_long()) != EOF) {
125 		switch (opt) {
126 		case 'I':
127 			inform = optarg;
128 			break;
129 		case 'O':
130 			outform = optarg;
131 			break;
132 		case 'o':
133 			outname = optarg;
134 			break;
135 		case 'V':
136 			outversion = strtol(optarg, NULL, 0);
137 			break;
138 		case 'd':
139 			depname = optarg;
140 			break;
141 		case 'R':
142 			reservenum = strtol(optarg, NULL, 0);
143 			break;
144 		case 'S':
145 			minsize = strtol(optarg, NULL, 0);
146 			break;
147 		case 'p':
148 			padsize = strtol(optarg, NULL, 0);
149 			break;
150 		case 'f':
151 			force = 1;
152 			break;
153 		case 'q':
154 			quiet++;
155 			break;
156 		case 'b':
157 			cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
158 			break;
159 		case 'i':
160 			srcfile_add_search_path(optarg);
161 			break;
162 		case 'v':
163 			util_version();
164 		case 'H':
165 			if (streq(optarg, "legacy"))
166 				phandle_format = PHANDLE_LEGACY;
167 			else if (streq(optarg, "epapr"))
168 				phandle_format = PHANDLE_EPAPR;
169 			else if (streq(optarg, "both"))
170 				phandle_format = PHANDLE_BOTH;
171 			else
172 				die("Invalid argument \"%s\" to -H option\n",
173 				    optarg);
174 			break;
175 
176 		case 's':
177 			sort = 1;
178 			break;
179 
180 		case 'W':
181 			parse_checks_option(true, false, optarg);
182 			break;
183 
184 		case 'E':
185 			parse_checks_option(false, true, optarg);
186 			break;
187 
188 		case 'h':
189 			usage(NULL);
190 		default:
191 			usage("unknown option");
192 		}
193 	}
194 
195 	if (argc > (optind+1))
196 		usage("missing files");
197 	else if (argc < (optind+1))
198 		arg = "-";
199 	else
200 		arg = argv[optind];
201 
202 	/* minsize and padsize are mutually exclusive */
203 	if (minsize && padsize)
204 		die("Can't set both -p and -S\n");
205 
206 	if (depname) {
207 		depfile = fopen(depname, "w");
208 		if (!depfile)
209 			die("Couldn't open dependency file %s: %s\n", depname,
210 			    strerror(errno));
211 		fprintf(depfile, "%s:", outname);
212 	}
213 
214 	if (streq(inform, "dts"))
215 		bi = dt_from_source(arg);
216 	else if (streq(inform, "fs"))
217 		bi = dt_from_fs(arg);
218 	else if(streq(inform, "dtb"))
219 		bi = dt_from_blob(arg);
220 	else
221 		die("Unknown input format \"%s\"\n", inform);
222 
223 	if (depfile) {
224 		fputc('\n', depfile);
225 		fclose(depfile);
226 	}
227 
228 	if (cmdline_boot_cpuid != -1)
229 		bi->boot_cpuid_phys = cmdline_boot_cpuid;
230 
231 	fill_fullpaths(bi->dt, "");
232 	process_checks(force, bi);
233 
234 	if (sort)
235 		sort_tree(bi);
236 
237 	if (streq(outname, "-")) {
238 		outf = stdout;
239 	} else {
240 		outf = fopen(outname, "w");
241 		if (! outf)
242 			die("Couldn't open output file %s: %s\n",
243 			    outname, strerror(errno));
244 	}
245 
246 	if (streq(outform, "dts")) {
247 		dt_to_source(outf, bi);
248 	} else if (streq(outform, "dtb")) {
249 		dt_to_blob(outf, bi, outversion);
250 	} else if (streq(outform, "asm")) {
251 		dt_to_asm(outf, bi, outversion);
252 	} else if (streq(outform, "null")) {
253 		/* do nothing */
254 	} else {
255 		die("Unknown output format \"%s\"\n", outform);
256 	}
257 
258 	exit(0);
259 }
260