| 1 | #!/usr/bin/env python |
| 2 | |
| 3 | """ |
| 4 | Create firmware for 8MB Bifferboards |
| 5 | Firmware does not include the config blocks |
| 6 | Firmware starts just after config |
| 7 | """ |
| 8 | |
| 9 | import struct, sys |
| 10 | |
| 11 | kernel_extent = 0x200000 |
| 12 | config = 0x6000 |
| 13 | |
| 14 | if __name__ == "__main__": |
| 15 | |
| 16 | if len(sys.argv) != 4: |
| 17 | print "usage: mkimg_bifferboard.py <kernel> <64k JFFS> <output file>" |
| 18 | sys.exit(0) |
| 19 | |
| 20 | bzimage = sys.argv[1] |
| 21 | rootfs = sys.argv[2] |
| 22 | target = sys.argv[3] |
| 23 | |
| 24 | # Kernel first |
| 25 | fw = file(bzimage).read() |
| 26 | if len(fw) > (kernel_extent - config): |
| 27 | raise IOError("Kernel too large") |
| 28 | |
| 29 | # Pad up to 0x200000 |
| 30 | while len(fw) < (kernel_extent - config): |
| 31 | fw += "\xff" |
| 32 | |
| 33 | fw += file(rootfs).read() |
| 34 | |
| 35 | # Check length of total |
| 36 | if len(fw) > (0x800000 - 0x10000 - 0x6000): |
| 37 | raise IOError("Rootfs too large") |
| 38 | |
| 39 | file(target,"wb").write(fw) |
| 40 | print "Firmware written to '%s'" % target |
| 41 | |
