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TOMOYO Linux Cross Reference
Linux/scripts/dtc/dtc.c

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  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 <sys/stat.h>
 22 
 23 #include "dtc.h"
 24 #include "srcpos.h"
 25 
 26 /*
 27  * Command line options
 28  */
 29 int quiet;              /* Level of quietness */
 30 int reservenum;         /* Number of memory reservation slots */
 31 int minsize;            /* Minimum blob size */
 32 int padsize;            /* Additional padding to blob */
 33 int alignsize;          /* Additional padding to blob accroding to the alignsize */
 34 int phandle_format = PHANDLE_EPAPR;     /* Use linux,phandle or phandle properties */
 35 int generate_symbols;   /* enable symbols & fixup support */
 36 int generate_fixups;            /* suppress generation of fixups on symbol support */
 37 int auto_label_aliases;         /* auto generate labels -> aliases */
 38 
 39 static int is_power_of_2(int x)
 40 {
 41         return (x > 0) && ((x & (x - 1)) == 0);
 42 }
 43 
 44 static void fill_fullpaths(struct node *tree, const char *prefix)
 45 {
 46         struct node *child;
 47         const char *unit;
 48 
 49         tree->fullpath = join_path(prefix, tree->name);
 50 
 51         unit = strchr(tree->name, '@');
 52         if (unit)
 53                 tree->basenamelen = unit - tree->name;
 54         else
 55                 tree->basenamelen = strlen(tree->name);
 56 
 57         for_each_child(tree, child)
 58                 fill_fullpaths(child, tree->fullpath);
 59 }
 60 
 61 /* Usage related data. */
 62 static const char usage_synopsis[] = "dtc [options] <input file>";
 63 static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv";
 64 static struct option const usage_long_opts[] = {
 65         {"quiet",            no_argument, NULL, 'q'},
 66         {"in-format",         a_argument, NULL, 'I'},
 67         {"out",               a_argument, NULL, 'o'},
 68         {"out-format",        a_argument, NULL, 'O'},
 69         {"out-version",       a_argument, NULL, 'V'},
 70         {"out-dependency",    a_argument, NULL, 'd'},
 71         {"reserve",           a_argument, NULL, 'R'},
 72         {"space",             a_argument, NULL, 'S'},
 73         {"pad",               a_argument, NULL, 'p'},
 74         {"align",             a_argument, NULL, 'a'},
 75         {"boot-cpu",          a_argument, NULL, 'b'},
 76         {"force",            no_argument, NULL, 'f'},
 77         {"include",           a_argument, NULL, 'i'},
 78         {"sort",             no_argument, NULL, 's'},
 79         {"phandle",           a_argument, NULL, 'H'},
 80         {"warning",           a_argument, NULL, 'W'},
 81         {"error",             a_argument, NULL, 'E'},
 82         {"symbols",          no_argument, NULL, '@'},
 83         {"auto-alias",       no_argument, NULL, 'A'},
 84         {"help",             no_argument, NULL, 'h'},
 85         {"version",          no_argument, NULL, 'v'},
 86         {NULL,               no_argument, NULL, 0x0},
 87 };
 88 static const char * const usage_opts_help[] = {
 89         "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all",
 90         "\n\tInput formats are:\n"
 91          "\t\tdts - device tree source text\n"
 92          "\t\tdtb - device tree blob\n"
 93          "\t\tfs  - /proc/device-tree style directory",
 94         "\n\tOutput file",
 95         "\n\tOutput formats are:\n"
 96          "\t\tdts - device tree source text\n"
 97          "\t\tdtb - device tree blob\n"
 98 #ifndef NO_YAML
 99          "\t\tyaml - device tree encoded as YAML\n"
100 #endif
101          "\t\tasm - assembler source",
102         "\n\tBlob version to produce, defaults to "stringify(DEFAULT_FDT_VERSION)" (for dtb and asm output)",
103         "\n\tOutput dependency file",
104         "\n\tMake space for <number> reserve map entries (for dtb and asm output)",
105         "\n\tMake the blob at least <bytes> long (extra space)",
106         "\n\tAdd padding to the blob of <bytes> long (extra space)",
107         "\n\tMake the blob align to the <bytes> (extra space)",
108         "\n\tSet the physical boot cpu",
109         "\n\tTry to produce output even if the input tree has errors",
110         "\n\tAdd a path to search for include files",
111         "\n\tSort nodes and properties before outputting (useful for comparing trees)",
112         "\n\tValid phandle formats are:\n"
113          "\t\tlegacy - \"linux,phandle\" properties only\n"
114          "\t\tepapr  - \"phandle\" properties only\n"
115          "\t\tboth   - Both \"linux,phandle\" and \"phandle\" properties",
116         "\n\tEnable/disable warnings (prefix with \"no-\")",
117         "\n\tEnable/disable errors (prefix with \"no-\")",
118         "\n\tEnable generation of symbols",
119         "\n\tEnable auto-alias of labels",
120         "\n\tPrint this help and exit",
121         "\n\tPrint version and exit",
122         NULL,
123 };
124 
125 static const char *guess_type_by_name(const char *fname, const char *fallback)
126 {
127         const char *s;
128 
129         s = strrchr(fname, '.');
130         if (s == NULL)
131                 return fallback;
132         if (!strcasecmp(s, ".dts"))
133                 return "dts";
134         if (!strcasecmp(s, ".yaml"))
135                 return "yaml";
136         if (!strcasecmp(s, ".dtb"))
137                 return "dtb";
138         return fallback;
139 }
140 
141 static const char *guess_input_format(const char *fname, const char *fallback)
142 {
143         struct stat statbuf;
144         fdt32_t magic;
145         FILE *f;
146 
147         if (stat(fname, &statbuf) != 0)
148                 return fallback;
149 
150         if (S_ISDIR(statbuf.st_mode))
151                 return "fs";
152 
153         if (!S_ISREG(statbuf.st_mode))
154                 return fallback;
155 
156         f = fopen(fname, "r");
157         if (f == NULL)
158                 return fallback;
159         if (fread(&magic, 4, 1, f) != 1) {
160                 fclose(f);
161                 return fallback;
162         }
163         fclose(f);
164 
165         if (fdt32_to_cpu(magic) == FDT_MAGIC)
166                 return "dtb";
167 
168         return guess_type_by_name(fname, fallback);
169 }
170 
171 int main(int argc, char *argv[])
172 {
173         struct dt_info *dti;
174         const char *inform = NULL;
175         const char *outform = NULL;
176         const char *outname = "-";
177         const char *depname = NULL;
178         bool force = false, sort = false;
179         const char *arg;
180         int opt;
181         FILE *outf = NULL;
182         int outversion = DEFAULT_FDT_VERSION;
183         long long cmdline_boot_cpuid = -1;
184 
185         quiet      = 0;
186         reservenum = 0;
187         minsize    = 0;
188         padsize    = 0;
189         alignsize  = 0;
190 
191         while ((opt = util_getopt_long()) != EOF) {
192                 switch (opt) {
193                 case 'I':
194                         inform = optarg;
195                         break;
196                 case 'O':
197                         outform = optarg;
198                         break;
199                 case 'o':
200                         outname = optarg;
201                         break;
202                 case 'V':
203                         outversion = strtol(optarg, NULL, 0);
204                         break;
205                 case 'd':
206                         depname = optarg;
207                         break;
208                 case 'R':
209                         reservenum = strtol(optarg, NULL, 0);
210                         break;
211                 case 'S':
212                         minsize = strtol(optarg, NULL, 0);
213                         break;
214                 case 'p':
215                         padsize = strtol(optarg, NULL, 0);
216                         break;
217                 case 'a':
218                         alignsize = strtol(optarg, NULL, 0);
219                         if (!is_power_of_2(alignsize))
220                                 die("Invalid argument \"%d\" to -a option\n",
221                                     alignsize);
222                         break;
223                 case 'f':
224                         force = true;
225                         break;
226                 case 'q':
227                         quiet++;
228                         break;
229                 case 'b':
230                         cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
231                         break;
232                 case 'i':
233                         srcfile_add_search_path(optarg);
234                         break;
235                 case 'v':
236                         util_version();
237                 case 'H':
238                         if (streq(optarg, "legacy"))
239                                 phandle_format = PHANDLE_LEGACY;
240                         else if (streq(optarg, "epapr"))
241                                 phandle_format = PHANDLE_EPAPR;
242                         else if (streq(optarg, "both"))
243                                 phandle_format = PHANDLE_BOTH;
244                         else
245                                 die("Invalid argument \"%s\" to -H option\n",
246                                     optarg);
247                         break;
248 
249                 case 's':
250                         sort = true;
251                         break;
252 
253                 case 'W':
254                         parse_checks_option(true, false, optarg);
255                         break;
256 
257                 case 'E':
258                         parse_checks_option(false, true, optarg);
259                         break;
260 
261                 case '@':
262                         generate_symbols = 1;
263                         break;
264                 case 'A':
265                         auto_label_aliases = 1;
266                         break;
267 
268                 case 'h':
269                         usage(NULL);
270                 default:
271                         usage("unknown option");
272                 }
273         }
274 
275         if (argc > (optind+1))
276                 usage("missing files");
277         else if (argc < (optind+1))
278                 arg = "-";
279         else
280                 arg = argv[optind];
281 
282         /* minsize and padsize are mutually exclusive */
283         if (minsize && padsize)
284                 die("Can't set both -p and -S\n");
285 
286         if (depname) {
287                 depfile = fopen(depname, "w");
288                 if (!depfile)
289                         die("Couldn't open dependency file %s: %s\n", depname,
290                             strerror(errno));
291                 fprintf(depfile, "%s:", outname);
292         }
293 
294         if (inform == NULL)
295                 inform = guess_input_format(arg, "dts");
296         if (outform == NULL) {
297                 outform = guess_type_by_name(outname, NULL);
298                 if (outform == NULL) {
299                         if (streq(inform, "dts"))
300                                 outform = "dtb";
301                         else
302                                 outform = "dts";
303                 }
304         }
305         if (streq(inform, "dts"))
306                 dti = dt_from_source(arg);
307         else if (streq(inform, "fs"))
308                 dti = dt_from_fs(arg);
309         else if(streq(inform, "dtb"))
310                 dti = dt_from_blob(arg);
311         else
312                 die("Unknown input format \"%s\"\n", inform);
313 
314         dti->outname = outname;
315 
316         if (depfile) {
317                 fputc('\n', depfile);
318                 fclose(depfile);
319         }
320 
321         if (cmdline_boot_cpuid != -1)
322                 dti->boot_cpuid_phys = cmdline_boot_cpuid;
323 
324         fill_fullpaths(dti->dt, "");
325 
326         /* on a plugin, generate by default */
327         if (dti->dtsflags & DTSF_PLUGIN) {
328                 generate_fixups = 1;
329         }
330 
331         process_checks(force, dti);
332 
333         if (auto_label_aliases)
334                 generate_label_tree(dti, "aliases", false);
335 
336         if (generate_symbols)
337                 generate_label_tree(dti, "__symbols__", true);
338 
339         if (generate_fixups) {
340                 generate_fixups_tree(dti, "__fixups__");
341                 generate_local_fixups_tree(dti, "__local_fixups__");
342         }
343 
344         if (sort)
345                 sort_tree(dti);
346 
347         if (streq(outname, "-")) {
348                 outf = stdout;
349         } else {
350                 outf = fopen(outname, "wb");
351                 if (! outf)
352                         die("Couldn't open output file %s: %s\n",
353                             outname, strerror(errno));
354         }
355 
356         if (streq(outform, "dts")) {
357                 dt_to_source(outf, dti);
358 #ifndef NO_YAML
359         } else if (streq(outform, "yaml")) {
360                 if (!streq(inform, "dts"))
361                         die("YAML output format requires dts input format\n");
362                 dt_to_yaml(outf, dti);
363 #endif
364         } else if (streq(outform, "dtb")) {
365                 dt_to_blob(outf, dti, outversion);
366         } else if (streq(outform, "asm")) {
367                 dt_to_asm(outf, dti, outversion);
368         } else if (streq(outform, "null")) {
369                 /* do nothing */
370         } else {
371                 die("Unknown output format \"%s\"\n", outform);
372         }
373 
374         exit(0);
375 }
376 

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