cregit-Linux how code gets into the kernel

Release 4.15 scripts/dtc/dtc.c

Directory: scripts/dtc
 * (C) Copyright David Gibson <>, 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
 *  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 <sys/stat.h>

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

int alignsize;		
/* Additional padding to blob accroding to the alignsize */

int phandle_format = PHANDLE_EPAPR;	
/* Use linux,phandle or phandle properties */

int generate_symbols;	
/* enable symbols & fixup support */

int generate_fixups;		
/* suppress generation of fixups on symbol support */

int auto_label_aliases;		
/* auto generate labels -> aliases */

static int is_power_of_2(int x) { return (x > 0) && ((x & (x - 1)) == 0); }


Rob Herring30100.00%1100.00%

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); }


David Gibson91100.00%2100.00%

/* Usage related data. */ #define FDT_VERSION(version) _FDT_VERSION(version) #define _FDT_VERSION(version) #version static const char usage_synopsis[] = "dtc [options] <input file>"; static const char usage_short_opts[] = "qI:O:o:V:d:R:S:p:a:fb:i:H:sW:E:@Ahv"; static struct option const usage_long_opts[] = { {"quiet", no_argument, NULL, 'q'}, {"in-format", a_argument, NULL, 'I'}, {"out", a_argument, NULL, 'o'}, {"out-format", a_argument, NULL, 'O'}, {"out-version", a_argument, NULL, 'V'}, {"out-dependency", a_argument, NULL, 'd'}, {"reserve", a_argument, NULL, 'R'}, {"space", a_argument, NULL, 'S'}, {"pad", a_argument, NULL, 'p'}, {"align", a_argument, NULL, 'a'}, {"boot-cpu", a_argument, NULL, 'b'}, {"force", no_argument, NULL, 'f'}, {"include", a_argument, NULL, 'i'}, {"sort", no_argument, NULL, 's'}, {"phandle", a_argument, NULL, 'H'}, {"warning", a_argument, NULL, 'W'}, {"error", a_argument, NULL, 'E'}, {"symbols", no_argument, NULL, '@'}, {"auto-alias", no_argument, NULL, 'A'}, {"help", no_argument, NULL, 'h'}, {"version", no_argument, NULL, 'v'}, {NULL, no_argument, NULL, 0x0}, }; static const char * const usage_opts_help[] = { "\n\tQuiet: -q suppress warnings, -qq errors, -qqq all", "\n\tInput formats are:\n" "\t\tdts - device tree source text\n" "\t\tdtb - device tree blob\n" "\t\tfs - /proc/device-tree style directory", "\n\tOutput file", "\n\tOutput formats are:\n" "\t\tdts - device tree source text\n" "\t\tdtb - device tree blob\n" "\t\tasm - assembler source", "\n\tBlob version to produce, defaults to "FDT_VERSION(DEFAULT_FDT_VERSION)" (for dtb and asm output)", "\n\tOutput dependency file", "\n\tMake space for <number> reserve map entries (for dtb and asm output)", "\n\tMake the blob at least <bytes> long (extra space)", "\n\tAdd padding to the blob of <bytes> long (extra space)", "\n\tMake the blob align to the <bytes> (extra space)", "\n\tSet the physical boot cpu", "\n\tTry to produce output even if the input tree has errors", "\n\tAdd a path to search for include files", "\n\tSort nodes and properties before outputting (useful for comparing trees)", "\n\tValid phandle formats are:\n" "\t\tlegacy - \"linux,phandle\" properties only\n" "\t\tepapr - \"phandle\" properties only\n" "\t\tboth - Both \"linux,phandle\" and \"phandle\" properties", "\n\tEnable/disable warnings (prefix with \"no-\")", "\n\tEnable/disable errors (prefix with \"no-\")", "\n\tEnable generation of symbols", "\n\tEnable auto-alias of labels", "\n\tPrint this help and exit", "\n\tPrint version and exit", NULL, };
static const char *guess_type_by_name(const char *fname, const char *fallback) { const char *s; s = strrchr(fname, '.'); if (s == NULL) return fallback; if (!strcasecmp(s, ".dts")) return "dts"; if (!strcasecmp(s, ".dtb")) return "dtb"; return fallback; }


Rob Herring70100.00%1100.00%

static const char *guess_input_format(const char *fname, const char *fallback) { struct stat statbuf; fdt32_t magic; FILE *f; if (stat(fname, &statbuf) != 0) return fallback; if (S_ISDIR(statbuf.st_mode)) return "fs"; if (!S_ISREG(statbuf.st_mode)) return fallback; f = fopen(fname, "r"); if (f == NULL) return fallback; if (fread(&magic, 4, 1, f) != 1) { fclose(f); return fallback; } fclose(f); if (fdt32_to_cpu(magic) == FDT_MAGIC) return "dtb"; return guess_type_by_name(fname, fallback); }


Rob Herring138100.00%2100.00%

int main(int argc, char *argv[]) { struct dt_info *dti; const char *inform = NULL; const char *outform = NULL; const char *outname = "-"; const char *depname = NULL; bool force = false, sort = false; 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; alignsize = 0; while ((opt = util_getopt_long()) != 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 'd': depname = optarg; 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 'a': alignsize = strtol(optarg, NULL, 0); if (!is_power_of_2(alignsize)) die("Invalid argument \"%d\" to -a option\n", alignsize); break; case 'f': force = true; break; case 'q': quiet++; break; case 'b': cmdline_boot_cpuid = strtoll(optarg, NULL, 0); break; case 'i': srcfile_add_search_path(optarg); break; case 'v': util_version(); case 'H': if (streq(optarg, "legacy")) phandle_format = PHANDLE_LEGACY; else if (streq(optarg, "epapr")) phandle_format = PHANDLE_EPAPR; else if (streq(optarg, "both")) phandle_format = PHANDLE_BOTH; else die("Invalid argument \"%s\" to -H option\n", optarg); break; case 's': sort = true; break; case 'W': parse_checks_option(true, false, optarg); break; case 'E': parse_checks_option(false, true, optarg); break; case '@': generate_symbols = 1; break; case 'A': auto_label_aliases = 1; break; case 'h': usage(NULL); default: usage("unknown option"); } } if (argc > (optind+1)) usage("missing files"); 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"); if (depname) { depfile = fopen(depname, "w"); if (!depfile) die("Couldn't open dependency file %s: %s\n", depname, strerror(errno)); fprintf(depfile, "%s:", outname); } if (inform == NULL) inform = guess_input_format(arg, "dts"); if (outform == NULL) { outform = guess_type_by_name(outname, NULL); if (outform == NULL) { if (streq(inform, "dts")) outform = "dtb"; else outform = "dts"; } } if (streq(inform, "dts")) dti = dt_from_source(arg); else if (streq(inform, "fs")) dti = dt_from_fs(arg); else if(streq(inform, "dtb")) dti = dt_from_blob(arg); else die("Unknown input format \"%s\"\n", inform); dti->outname = outname; if (depfile) { fputc('\n', depfile); fclose(depfile); } if (cmdline_boot_cpuid != -1) dti->boot_cpuid_phys = cmdline_boot_cpuid; fill_fullpaths(dti->dt, ""); process_checks(force, dti); /* on a plugin, generate by default */ if (dti->dtsflags & DTSF_PLUGIN) { generate_fixups = 1; } if (auto_label_aliases) generate_label_tree(dti, "aliases", false); if (generate_symbols) generate_label_tree(dti, "__symbols__", true); if (generate_fixups) { generate_fixups_tree(dti, "__fixups__"); generate_local_fixups_tree(dti, "__local_fixups__"); } if (sort) sort_tree(dti); if (streq(outname, "-")) { outf = stdout; } else { outf = fopen(outname, "wb"); if (! outf) die("Couldn't open output file %s: %s\n", outname, strerror(errno)); } if (streq(outform, "dts")) { dt_to_source(outf, dti); } else if (streq(outform, "dtb")) { dt_to_blob(outf, dti, outversion); } else if (streq(outform, "asm")) { dt_to_asm(outf, dti, outversion); } else if (streq(outform, "null")) { /* do nothing */ } else { die("Unknown output format \"%s\"\n", outform); } exit(0); }


David Gibson47554.85%220.00%
Rob Herring19522.52%440.00%
Stephen Warren10912.59%220.00%
John Bonesio728.31%110.00%
Grant C. Likely151.73%110.00%

Overall Contributors

David Gibson59637.91%218.18%
Rob Herring51132.51%545.45%
Grant C. Likely28217.94%19.09%
Stephen Warren1096.93%218.18%
John Bonesio744.71%19.09%
Directory: scripts/dtc
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