Benedict, Michael wrote:
David Hawkins wrote:
Confusing eh!?
Very! Thank you for explaining it.
Look at the p14, and follow along with that example, see if you can see the right bytes in memory.
Almost, but not quite. For one, the flash was locked, and that was why the flash erase/copy would not take before. Secondly, the eleventh byte is different, which I think just means I have a different rev than yours, 0x43 vs. 0x7f (and I can verify that it is a read-only register):
=> md.b f8000000 20 f8000000: 2f 0c 40 08 86 af 07 33 ff ff 43 12 ff ff ff 02 /.@....3..C..... f8000010: 22 07 05 19 24 ff ff ff ff ff ff ff ff ff ff ff "...$...........
Take the time to read the document I sent. Read the MPC8349 manual with regards to resetting the processor. Eventually it'll make sense. I found it confusing to start with. Hopefully this will help you.
Big help already, I was able to flash the new u-boot to fe000000, when I could not before. Unfortunately, I am still booting to the old u-boot at fff00000(?) I apologize if I am being dense, but I thought your document indicates flashing fe000000 with a u-boot.bin would be all that is required to boot from low memory. See below:
Not quite. The HRCW at fe000000 must indicate that you want to boot from fe000000 (actually, fe000100). To do that, configure U-Boot with "make MPC8349ITX_LOWBOOT_config" and flash that u-boot.bin at fe000000.
=> md fe000000 fe000000: 04040404 04040404 04040404 04040404 ................ fe000010: 00000000 00000000 00000000 00000000 ................ fe000020: b0b0b0b0 b0b0b0b0 60606060 60606060 ........```````` fe000030: a0a0a0a0 a0a0a0a0 00000000 00000000 ................
Your HRCW is 04040000 b060a000, which means lowboot. You must have something overriding your HRCW. How is J22 jumpered?