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-rw-r--r--tools/firmware-utils/src/ptgen.c219
1 files changed, 219 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/ptgen.c b/tools/firmware-utils/src/ptgen.c
new file mode 100644
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+++ b/tools/firmware-utils/src/ptgen.c
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+/*
+ * ptgen - partition table generator
+ * Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
+ *
+ * uses parts of afdisk
+ * Copyright (C) 2002 by David Roetzel <david@roetzel.de>
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <fcntl.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_le16(x) bswap_16(x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_le16(x) (x)
+#else
+#error unknown endianness!
+#endif
+
+/* Partition table entry */
+struct pte {
+ unsigned char active;
+ unsigned char chs_start[3];
+ unsigned char type;
+ unsigned char chs_end[3];
+ unsigned int start;
+ unsigned int length;
+};
+
+struct partinfo {
+ unsigned long size;
+ int type;
+};
+
+int verbose = 0;
+int active = 1;
+int heads = -1;
+int sectors = -1;
+struct partinfo parts[4];
+char *filename = NULL;
+
+
+/*
+ * parse the size argument, which is either
+ * a simple number (K assumed) or
+ * K, M or G
+ *
+ * returns the size in KByte
+ */
+static long to_kbytes(const char *string) {
+ int exp = 0;
+ long result;
+ char *end;
+
+ result = strtoul(string, &end, 0);
+ switch (tolower(*end)) {
+ case 'k' :
+ case '\0' : exp = 0; break;
+ case 'm' : exp = 1; break;
+ case 'g' : exp = 2; break;
+ default: return 0;
+ }
+
+ if (*end)
+ end++;
+
+ if (*end) {
+ fprintf(stderr, "garbage after end of number\n");
+ return 0;
+ }
+
+ /* result: number + 1024^(exp) */
+ return result * ((2 << ((10 * exp) - 1)) ?: 1);
+}
+
+/* convert the sector number into a CHS value for the partition table */
+static void to_chs(long sect, unsigned char chs[3]) {
+ int c,h,s;
+
+ s = (sect % sectors) + 1;
+ sect = sect / sectors;
+ h = sect % heads;
+ sect = sect / heads;
+ c = sect;
+
+ chs[0] = h;
+ chs[1] = s | ((c >> 2) & 0xC0);
+ chs[2] = c & 0xFF;
+
+ return;
+}
+
+/* round the sector number up to the next cylinder */
+static inline unsigned long round_to_cyl(long sect) {
+ int cyl_size = heads * sectors;
+
+ return sect + cyl_size - ((sect % cyl_size) ?: cyl_size);
+}
+
+/* check the partition sizes and write the partition table */
+static int gen_ptable(int nr)
+{
+ struct pte pte[4];
+ unsigned long sect = 0;
+ int i, fd, ret = -1, start, len;
+
+ memset(pte, 0, sizeof(struct pte) * 4);
+ for (i = 0; i < nr; i++) {
+ if (!parts[i].size) {
+ fprintf(stderr, "Invalid size in partition %d!\n", i);
+ return -1;
+ }
+ pte[i].active = ((i + 1) == active) ? 0x80 : 0;
+ pte[i].type = parts[i].type;
+ pte[i].start = cpu_to_le16(start = sect + sectors);
+ sect = round_to_cyl(start + parts[i].size * 2);
+ pte[i].length = cpu_to_le16(len = sect - start);
+ to_chs(start, pte[i].chs_start);
+ to_chs(start + len - 1, pte[i].chs_end);
+ if (verbose)
+ fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n", i, (long) start * 512, ((long) start + (long) len) * 512, (long) len * 512);
+ printf("%ld\n", ((long) start * 512));
+ }
+
+ if ((fd = open(filename, O_WRONLY|O_CREAT, 0644)) < 0) {
+ fprintf(stderr, "Can't open output file '%s'\n",filename);
+ return -1;
+ }
+
+ lseek(fd, 446, SEEK_SET);
+ if (write(fd, pte, sizeof(struct pte) * 4) != sizeof(struct pte) * 4) {
+ fprintf(stderr, "write failed.\n");
+ goto fail;
+ }
+ lseek(fd, 510, SEEK_SET);
+ if (write(fd, "\x55\xaa", 2) != 2) {
+ fprintf(stderr, "write failed.\n");
+ goto fail;
+ }
+
+ ret = 0;
+fail:
+ close(fd);
+ return ret;
+}
+
+static void usage(char *prog)
+{
+ fprintf(stderr, "Usage: %s [-v] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [[-t <type>] -p <size>...] \n", prog);
+ exit(1);
+}
+
+int main (int argc, char **argv)
+{
+ char type = 0x83;
+ int ch;
+ int part = 0;
+
+ while ((ch = getopt(argc, argv, "h:s:p:a:t:o:v")) != -1) {
+ switch (ch) {
+ case 'o':
+ filename = optarg;
+ break;
+ case 'v':
+ verbose++;
+ break;
+ case 'h':
+ heads = (int) strtoul(optarg, NULL, 0);
+ break;
+ case 's':
+ sectors = (int) strtoul(optarg, NULL, 0);
+ break;
+ case 'p':
+ if (part > 3) {
+ fprintf(stderr, "Too many partitions\n");
+ exit(1);
+ }
+ parts[part].size = to_kbytes(optarg);
+ parts[part++].type = type;
+ break;
+ case 't':
+ type = (char) strtoul(optarg, NULL, 16);
+ break;
+ case 'a':
+ active = (int) strtoul(optarg, NULL, 0);
+ if ((active < 0) || (active > 4))
+ active = 0;
+ break;
+ case '?':
+ default:
+ usage(argv[0]);
+ }
+ }
+ argc -= optind;
+ if (argc || (heads <= 0) || (sectors <= 0) || !filename)
+ usage(argv[0]);
+
+ return gen_ptable(part);
+}