target/linux/rdc/image/mkimg_bifferboard.py

   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