From 9fffb55f66127b52c937ede5196ebfa0c0d50bce Mon Sep 17 00:00:00 2001 From: David Gibson Date: Thu, 30 Apr 2009 15:25:53 +1000 Subject: Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc The powerpc kernel always requires an Open Firmware like device tree to supply device information. On systems without OF, this comes from a flattened device tree blob. This blob is usually generated by dtc, a tool which compiles a text description of the device tree into the flattened format used by the kernel. Sometimes, the bootwrapper makes small changes to the pre-compiled device tree blob (e.g. filling in the size of RAM). To do this it uses the libfdt library. Because these are only used on powerpc, the code for both these tools is included under arch/powerpc/boot (these were imported and are periodically updated from the upstream dtc tree). However, the microblaze architecture, currently being prepared for merging to mainline also uses dtc to produce device tree blobs. A few other archs have also mentioned some interest in using dtc. Therefore, this patch moves dtc and libfdt from arch/powerpc into scripts, where it can be used by any architecture. The vast bulk of this patch is a literal move, the rest is adjusting the various Makefiles to use dtc and libfdt correctly from their new locations. Signed-off-by: David Gibson Signed-off-by: Linus Torvalds --- scripts/dtc/dtc.c | 226 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 226 insertions(+) create mode 100644 scripts/dtc/dtc.c (limited to 'scripts/dtc/dtc.c') diff --git a/scripts/dtc/dtc.c b/scripts/dtc/dtc.c new file mode 100644 index 000000000000..d8fd43b4ac1a --- /dev/null +++ b/scripts/dtc/dtc.c @@ -0,0 +1,226 @@ +/* + * (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 + * 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] \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 \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 \n"); + fprintf(stderr, "\t-O \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 \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 \n"); + fprintf(stderr, "\t\tMake space for reserve map entries (relevant for \n\t\tdtb and asm output only)\n"); + fprintf(stderr, "\t-S \n"); + fprintf(stderr, "\t\tMake the blob at least long (extra space)\n"); + fprintf(stderr, "\t-p \n"); + fprintf(stderr, "\t\tAdd padding to the blob of long (extra space)\n"); + fprintf(stderr, "\t-b \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); +} -- cgit v1.2.3-59-g8ed1b