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@ -1,21 +1,31 @@ |
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#!/usr/bin/env python |
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#!/usr/bin/env python |
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""" |
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""" |
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Create firmware for 8MB Bifferboards |
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Create firmware for 4/8MB Bifferboards, suitable for uploading using |
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Firmware does not include the config blocks |
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either bb_upload8.py or bb_eth_upload8.py |
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Firmware starts just after config |
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""" |
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""" |
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import struct, sys |
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import struct, sys |
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kernel_extent = 0x200000 |
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# Increase the kmax value if the script gives errors about the kernel being |
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config = 0x6000 |
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# too large. You need to set the Biffboot kmax value to the same value you |
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# use here. |
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kmax = 0x10 |
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# No need to change this for 4MB devices, it's only used to tell you if |
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# the firmware is too large! |
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flash_size = 0x800000 |
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# This is always the same, for 1MB, 4MB and 8MB devices |
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config_extent = 0x6000 |
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kernel_extent = kmax * 0x10000 |
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if __name__ == "__main__": |
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if __name__ == "__main__": |
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if len(sys.argv) != 4: |
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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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print "usage: mkimg_bifferboard.py <kernel> <rootfs> <output file>" |
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sys.exit(0) |
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sys.exit(-1) |
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bzimage = sys.argv[1] |
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bzimage = sys.argv[1] |
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rootfs = sys.argv[2] |
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rootfs = sys.argv[2] |
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@ -23,17 +33,17 @@ if __name__ == "__main__": |
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# Kernel first |
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# Kernel first |
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fw = file(bzimage).read() |
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fw = file(bzimage).read() |
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if len(fw) > (kernel_extent - config): |
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if len(fw) > (kernel_extent - config_extent): |
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raise IOError("Kernel too large") |
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raise IOError("Kernel too large") |
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# Pad up to 0x200000 |
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# Pad up to end of kernel partition |
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while len(fw) < (kernel_extent - config): |
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while len(fw) < (kernel_extent - config_extent): |
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fw += "\xff" |
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fw += "\xff" |
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fw += file(rootfs).read() |
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fw += file(rootfs).read() |
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# Check length of total |
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# Check length of total |
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if len(fw) > (0x800000 - 0x10000 - 0x6000): |
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if len(fw) > (flash_size - 0x10000 - config_extent): |
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raise IOError("Rootfs too large") |
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raise IOError("Rootfs too large") |
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file(target,"wb").write(fw) |
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file(target,"wb").write(fw) |
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