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authorLinus Nielsen Feltzing <linus@haxx.se>2005-01-28 12:28:35 +0000
committerLinus Nielsen Feltzing <linus@haxx.se>2005-01-28 12:28:35 +0000
commitabf3ea672aeaa928a3bc0ad87f35e9f2f4318895 (patch)
tree79d5db82c06e955ebce7833ff62aabcbe1e806aa /tools/mkboot.c
parent35c27b82c3cbe7060c371eb055119f1e8d65546a (diff)
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New tool to insert the rockbox boot loader into the original firmware (iRiver)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5690 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'tools/mkboot.c')
-rw-r--r--tools/mkboot.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/tools/mkboot.c b/tools/mkboot.c
new file mode 100644
index 0000000000..e2d971d740
--- /dev/null
+++ b/tools/mkboot.c
@@ -0,0 +1,162 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2005 by Linus Nielsen Feltzing
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <stdlib.h>
+
+void usage(void)
+{
+ printf("usage: mkboot <firmware file> <boot file> <output file>\n");
+
+ exit(1);
+}
+
+char image[0x200000 + 0x220 + 0x200000/0x200];
+
+int main(int argc, char *argv[])
+{
+ char *infile, *bootfile, *outfile;
+ FILE *f;
+ long pos;
+ int i;
+ int file_length;
+ int len;
+ int actual_length, total_length, binary_length, num_chksums;
+
+ if(argc < 3) {
+ usage();
+ }
+
+ infile = argv[1];
+ bootfile = argv[2];
+ outfile = argv[3];
+
+ memset(image, 0xff, sizeof(image));
+
+ /* First, read the iriver original firmware into the image */
+ f = fopen(infile, "rb");
+ if(!f) {
+ perror(infile);
+ exit(1);
+ }
+
+ i = fread(image, 1, 16, f);
+ if(i < 16) {
+ perror(infile);
+ exit(1);
+ }
+
+ /* This is the length of the binary image without the scrambling
+ overhead (but including the ESTFBINR header) */
+ binary_length = image[4] + (image[5] << 8) +
+ (image[6] << 16) + (image[7] << 24);
+
+ /* Read the rest of the binary data, but not the checksum block */
+ len = binary_length+0x200-16;
+ i = fread(image+16, 1, len, f);
+ if(i < len) {
+ perror(infile);
+ exit(1);
+ }
+
+ fclose(f);
+
+ /* Now, read the boot loader into the image */
+ f = fopen(bootfile, "rb");
+ if(!f) {
+ perror(bootfile);
+ exit(1);
+ }
+
+ fseek(f, 0, SEEK_END);
+ len = ftell(f);
+
+ fseek(f, 0, SEEK_SET);
+
+ i = fread(image+0x220 + 0x1f0000, 1, len, f);
+ if(i < len) {
+ perror(bootfile);
+ exit(1);
+ }
+
+ fclose(f);
+
+ f = fopen(outfile, "wb");
+ if(!f) {
+ perror(outfile);
+ exit(1);
+ }
+
+ /* Patch the reset vector to start the boot loader */
+ image[0x220 + 4] = image[0x1f0000 + 0x220 + 4];
+ image[0x220 + 5] = image[0x1f0000 + 0x220 + 5];
+ image[0x220 + 6] = image[0x1f0000 + 0x220 + 6];
+ image[0x220 + 7] = image[0x1f0000 + 0x220 + 7];
+
+ /* This is the actual length of the binary, excluding all headers */
+ actual_length = 0x1f0000 + len;
+
+ /* Patch the ESTFBINR header */
+ image[0x20c] = (actual_length >> 24) & 0xff;
+ image[0x20d] = (actual_length >> 16) & 0xff;
+ image[0x20e] = (actual_length >> 8) & 0xff;
+ image[0x20f] = actual_length & 0xff;
+
+ image[0x21c] = (actual_length >> 24) & 0xff;
+ image[0x21d] = (actual_length >> 16) & 0xff;
+ image[0x21e] = (actual_length >> 8) & 0xff;
+ image[0x21f] = actual_length & 0xff;
+
+ /* This is the length of the binary, including the ESTFBINR header and
+ rounded up to the nearest 0x200 boundary */
+ binary_length = (actual_length + 0x20 + 0x1ff) & 0xfffffe00;
+
+ /* The number of checksums, i.e number of 0x200 byte blocks */
+ num_chksums = binary_length / 0x200;
+
+ /* The total file length, including all headers and checksums */
+ total_length = binary_length + num_chksums + 0x200;
+
+ /* Patch the scrambler header with the new length info */
+ image[0] = total_length & 0xff;
+ image[1] = (total_length >> 8) & 0xff;
+ image[2] = (total_length >> 16) & 0xff;
+ image[3] = (total_length >> 24) & 0xff;
+
+ image[4] = binary_length & 0xff;
+ image[5] = (binary_length >> 8) & 0xff;
+ image[6] = (binary_length >> 16) & 0xff;
+ image[7] = (binary_length >> 24) & 0xff;
+
+ image[8] = num_chksums & 0xff;
+ image[9] = (num_chksums >> 8) & 0xff;
+ image[10] = (num_chksums >> 16) & 0xff;
+ image[11] = (num_chksums >> 24) & 0xff;
+
+ i = fwrite(image, 1, total_length, f);
+ if(i < total_length) {
+ perror(outfile);
+ exit(1);
+ }
+
+ printf("Wrote 0x%x bytes in %s\n", total_length, outfile);
+
+ fclose(f);
+
+ return 0;
+}