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dtc.c

/*
 * (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 "dtc.h"
#include "srcpos.h"

#include "version_gen.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 */

char *join_path(const char *path, const char *name)
{
      int lenp = strlen(path);
      int lenn = strlen(name);
      int len;
      int needslash = 1;
      char *str;

      len = lenp + lenn + 2;
      if ((lenp > 0) && (path[lenp-1] == '/')) {
            needslash = 0;
            len--;
      }

      str = xmalloc(len);
      memcpy(str, path, lenp);
      if (needslash) {
            str[lenp] = '/';
            lenp++;
      }
      memcpy(str+lenp, name, lenn+1);
      return str;
}

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);
}

static void  __attribute__ ((noreturn)) usage(void)
{
      fprintf(stderr, "Usage:\n");
      fprintf(stderr, "\tdtc [options] <input file>\n");
      fprintf(stderr, "\nOptions:\n");
      fprintf(stderr, "\t-h\n");
      fprintf(stderr, "\t\tThis help text\n");
      fprintf(stderr, "\t-q\n");
      fprintf(stderr, "\t\tQuiet: -q suppress warnings, -qq errors, -qqq all\n");
      fprintf(stderr, "\t-I <input format>\n");
      fprintf(stderr, "\t\tInput formats are:\n");
      fprintf(stderr, "\t\t\tdts - device tree source text\n");
      fprintf(stderr, "\t\t\tdtb - device tree blob\n");
      fprintf(stderr, "\t\t\tfs - /proc/device-tree style directory\n");
      fprintf(stderr, "\t-o <output file>\n");
      fprintf(stderr, "\t-O <output format>\n");
      fprintf(stderr, "\t\tOutput formats are:\n");
      fprintf(stderr, "\t\t\tdts - device tree source text\n");
      fprintf(stderr, "\t\t\tdtb - device tree blob\n");
      fprintf(stderr, "\t\t\tasm - assembler source\n");
      fprintf(stderr, "\t-V <output version>\n");
      fprintf(stderr, "\t\tBlob version to produce, defaults to %d (relevant for dtb\n\t\tand asm output only)\n", DEFAULT_FDT_VERSION);
      fprintf(stderr, "\t-R <number>\n");
      fprintf(stderr, "\t\tMake space for <number> reserve map entries (relevant for \n\t\tdtb and asm output only)\n");
      fprintf(stderr, "\t-S <bytes>\n");
      fprintf(stderr, "\t\tMake the blob at least <bytes> long (extra space)\n");
      fprintf(stderr, "\t-p <bytes>\n");
      fprintf(stderr, "\t\tAdd padding to the blob of <bytes> long (extra space)\n");
      fprintf(stderr, "\t-b <number>\n");
      fprintf(stderr, "\t\tSet the physical boot cpu\n");
      fprintf(stderr, "\t-f\n");
      fprintf(stderr, "\t\tForce - try to produce output even if the input tree has errors\n");
      fprintf(stderr, "\t-v\n");
      fprintf(stderr, "\t\tPrint DTC version and exit\n");
      exit(3);
}

int main(int argc, char *argv[])
{
      struct boot_info *bi;
      const char *inform = "dts";
      const char *outform = "dts";
      const char *outname = "-";
      int force = 0, check = 0;
      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;

      while ((opt = getopt(argc, argv, "hI:O:o:V:R:S:p:fcqb:v")) != 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 'R':
                  reservenum = strtol(optarg, NULL, 0);
                  break;
            case 'S':
                  minsize = strtol(optarg, NULL, 0);
                  break;
            case 'p':
                  padsize = strtol(optarg, NULL, 0);
                  break;
            case 'f':
                  force = 1;
                  break;
            case 'c':
                  check = 1;
                  break;
            case 'q':
                  quiet++;
                  break;
            case 'b':
                  cmdline_boot_cpuid = strtoll(optarg, NULL, 0);
                  break;
            case 'v':
                  printf("Version: %s\n", DTC_VERSION);
                  exit(0);
            case 'h':
            default:
                  usage();
            }
      }

      if (argc > (optind+1))
            usage();
      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");

      fprintf(stderr, "DTC: %s->%s  on file \"%s\"\n",
            inform, outform, arg);

      if (streq(inform, "dts"))
            bi = dt_from_source(arg);
      else if (streq(inform, "fs"))
            bi = dt_from_fs(arg);
      else if(streq(inform, "dtb"))
            bi = dt_from_blob(arg);
      else
            die("Unknown input format \"%s\"\n", inform);

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

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


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

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

      exit(0);
}

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