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 "dtc.h"
  22#include "srcpos.h"
  23
  24#include "version_gen.h"
  25
  26/*
  27 * Command line options
  28 */
  29int quiet;              /* Level of quietness */
  30int reservenum;         /* Number of memory reservation slots */
  31int minsize;            /* Minimum blob size */
  32int padsize;            /* Additional padding to blob */
  33int phandle_format = PHANDLE_BOTH;      /* Use linux,phandle or phandle properties */
  34
  35static void fill_fullpaths(struct node *tree, const char *prefix)
  36{
  37        struct node *child;
  38        const char *unit;
  39
  40        tree->fullpath = join_path(prefix, tree->name);
  41
  42        unit = strchr(tree->name, '@');
  43        if (unit)
  44                tree->basenamelen = unit - tree->name;
  45        else
  46                tree->basenamelen = strlen(tree->name);
  47
  48        for_each_child(tree, child)
  49                fill_fullpaths(child, tree->fullpath);
  50}
  51
  52static void  __attribute__ ((noreturn)) usage(void)
  53{
  54        fprintf(stderr, "Usage:\n");
  55        fprintf(stderr, "\tdtc [options] <input file>\n");
  56        fprintf(stderr, "\nOptions:\n");
  57        fprintf(stderr, "\t-h\n");
  58        fprintf(stderr, "\t\tThis help text\n");
  59        fprintf(stderr, "\t-q\n");
  60        fprintf(stderr, "\t\tQuiet: -q suppress warnings, -qq errors, -qqq all\n");
  61        fprintf(stderr, "\t-I <input format>\n");
  62        fprintf(stderr, "\t\tInput formats are:\n");
  63        fprintf(stderr, "\t\t\tdts - device tree source text\n");
  64        fprintf(stderr, "\t\t\tdtb - device tree blob\n");
  65        fprintf(stderr, "\t\t\tfs - /proc/device-tree style directory\n");
  66        fprintf(stderr, "\t-o <output file>\n");
  67        fprintf(stderr, "\t-O <output format>\n");
  68        fprintf(stderr, "\t\tOutput formats are:\n");
  69        fprintf(stderr, "\t\t\tdts - device tree source text\n");
  70        fprintf(stderr, "\t\t\tdtb - device tree blob\n");
  71        fprintf(stderr, "\t\t\tasm - assembler source\n");
  72        fprintf(stderr, "\t-V <output version>\n");
  73        fprintf(stderr, "\t\tBlob version to produce, defaults to %d (relevant for dtb\n\t\tand asm output only)\n", DEFAULT_FDT_VERSION);
  74        fprintf(stderr, "\t-d <output dependency file>\n");
  75        fprintf(stderr, "\t-R <number>\n");
  76        fprintf(stderr, "\t\tMake space for <number> reserve map entries (relevant for \n\t\tdtb and asm output only)\n");
  77        fprintf(stderr, "\t-S <bytes>\n");
  78        fprintf(stderr, "\t\tMake the blob at least <bytes> long (extra space)\n");
  79        fprintf(stderr, "\t-p <bytes>\n");
  80        fprintf(stderr, "\t\tAdd padding to the blob of <bytes> long (extra space)\n");
  81        fprintf(stderr, "\t-b <number>\n");
  82        fprintf(stderr, "\t\tSet the physical boot cpu\n");
  83        fprintf(stderr, "\t-f\n");
  84        fprintf(stderr, "\t\tForce - try to produce output even if the input tree has errors\n");
  85        fprintf(stderr, "\t-s\n");
  86        fprintf(stderr, "\t\tSort nodes and properties before outputting (only useful for\n\t\tcomparing trees)\n");
  87        fprintf(stderr, "\t-v\n");
  88        fprintf(stderr, "\t\tPrint DTC version and exit\n");
  89        fprintf(stderr, "\t-H <phandle format>\n");
  90        fprintf(stderr, "\t\tphandle formats are:\n");
  91        fprintf(stderr, "\t\t\tlegacy - \"linux,phandle\" properties only\n");
  92        fprintf(stderr, "\t\t\tepapr - \"phandle\" properties only\n");
  93        fprintf(stderr, "\t\t\tboth - Both \"linux,phandle\" and \"phandle\" properties\n");
  94        exit(3);
  95}
  96
  97int main(int argc, char *argv[])
  98{
  99        struct boot_info *bi;
 100        const char *inform = "dts";
 101        const char *outform = "dts";
 102        const char *outname = "-";
 103        const char *depname = NULL;
 104        int force = 0, check = 0, sort = 0;
 105        const char *arg;
 106        int opt;
 107        FILE *outf = NULL;
 108        int outversion = DEFAULT_FDT_VERSION;
 109        long long cmdline_boot_cpuid = -1;
 110
 111        quiet      = 0;
 112        reservenum = 0;
 113        minsize    = 0;
 114        padsize    = 0;
 115
 116        while ((opt = getopt(argc, argv, "hI:O:o:V:d:R:S:p:fcqb:vH:s"))
 117                        != EOF) {
 118                switch (opt) {
 119                case 'I':
 120                        inform = optarg;
 121                        break;
 122                case 'O':
 123                        outform = optarg;
 124                        break;
 125                case 'o':
 126                        outname = optarg;
 127                        break;
 128                case 'V':
 129                        outversion = strtol(optarg, NULL, 0);
 130                        break;
 131                case 'd':
 132                        depname = optarg;
 133                        break;
 134                case 'R':
 135                        reservenum = strtol(optarg, NULL, 0);
 136                        break;
 137                case 'S':
 138                        minsize = strtol(optarg, NULL, 0);
 139                        break;
 140                case 'p':
 141                        padsize = strtol(optarg, NULL, 0);
 142                        break;
 143                case 'f':
 144                        force = 1;
 145                        break;
 146                case 'c':
 147                        check = 1;
 148                        break;
 149                case 'q':
 150                        quiet++;
 151                        break;
 152                case 'b':
 153                        cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
 154                        break;
 155                case 'v':
 156                        printf("Version: %s\n", DTC_VERSION);
 157                        exit(0);
 158                case 'H':
 159                        if (streq(optarg, "legacy"))
 160                                phandle_format = PHANDLE_LEGACY;
 161                        else if (streq(optarg, "epapr"))
 162                                phandle_format = PHANDLE_EPAPR;
 163                        else if (streq(optarg, "both"))
 164                                phandle_format = PHANDLE_BOTH;
 165                        else
 166                                die("Invalid argument \"%s\" to -H option\n",
 167                                    optarg);
 168                        break;
 169
 170                case 's':
 171                        sort = 1;
 172                        break;
 173
 174                case 'h':
 175                default:
 176                        usage();
 177                }
 178        }
 179
 180        if (argc > (optind+1))
 181                usage();
 182        else if (argc < (optind+1))
 183                arg = "-";
 184        else
 185                arg = argv[optind];
 186
 187        /* minsize and padsize are mutually exclusive */
 188        if (minsize && padsize)
 189                die("Can't set both -p and -S\n");
 190
 191        if (minsize)
 192                fprintf(stderr, "DTC: Use of \"-S\" is deprecated; it will be removed soon, use \"-p\" instead\n");
 193
 194        fprintf(stderr, "DTC: %s->%s  on file \"%s\"\n",
 195                inform, outform, arg);
 196
 197        if (depname) {
 198                depfile = fopen(depname, "w");
 199                if (!depfile)
 200                        die("Couldn't open dependency file %s: %s\n", depname,
 201                            strerror(errno));
 202                fprintf(depfile, "%s:", outname);
 203        }
 204
 205        if (streq(inform, "dts"))
 206                bi = dt_from_source(arg);
 207        else if (streq(inform, "fs"))
 208                bi = dt_from_fs(arg);
 209        else if(streq(inform, "dtb"))
 210                bi = dt_from_blob(arg);
 211        else
 212                die("Unknown input format \"%s\"\n", inform);
 213
 214        if (depfile) {
 215                fputc('\n', depfile);
 216                fclose(depfile);
 217        }
 218
 219        if (cmdline_boot_cpuid != -1)
 220                bi->boot_cpuid_phys = cmdline_boot_cpuid;
 221
 222        fill_fullpaths(bi->dt, "");
 223        process_checks(force, bi);
 224
 225        if (sort)
 226                sort_tree(bi);
 227
 228        if (streq(outname, "-")) {
 229                outf = stdout;
 230        } else {
 231                outf = fopen(outname, "w");
 232                if (! outf)
 233                        die("Couldn't open output file %s: %s\n",
 234                            outname, strerror(errno));
 235        }
 236
 237        if (streq(outform, "dts")) {
 238                dt_to_source(outf, bi);
 239        } else if (streq(outform, "dtb")) {
 240                dt_to_blob(outf, bi, outversion);
 241        } else if (streq(outform, "asm")) {
 242                dt_to_asm(outf, bi, outversion);
 243        } else if (streq(outform, "null")) {
 244                /* do nothing */
 245        } else {
 246                die("Unknown output format \"%s\"\n", outform);
 247        }
 248
 249        exit(0);
 250}
 251