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41 lines
862 B
Python
41 lines
862 B
Python
#!/usr/bin/env python
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"""
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Create firmware for 8MB Bifferboards
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Firmware does not include the config blocks
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Firmware starts just after config
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"""
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import struct, sys
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kernel_extent = 0x200000
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config = 0x6000
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if __name__ == "__main__":
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if len(sys.argv) != 4:
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print "usage: mkimg_bifferboard.py <kernel> <64k JFFS> <output file>"
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sys.exit(0)
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bzimage = sys.argv[1]
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rootfs = sys.argv[2]
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target = sys.argv[3]
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# Kernel first
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fw = file(bzimage).read()
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if len(fw) > (kernel_extent - config):
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raise IOError("Kernel too large")
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# Pad up to 0x200000
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while len(fw) < (kernel_extent - config):
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fw += "\xff"
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fw += file(rootfs).read()
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# Check length of total
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if len(fw) > (0x800000 - 0x10000 - 0x6000):
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raise IOError("Rootfs too large")
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file(target,"wb").write(fw)
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print "Firmware written to '%s'" % target
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