> > I accidently erased it, so my journey for unbricking the device began. > > at91bootstrap, openocd, barebox - they all once supported A9G20, but > > nowadays all of them were broken. Well, I fixed openocd and barebox > > mostly so far, the bootstrap is still the missing piece. > > You may be hit by the newer gcc optimize the delays in > the sdram init code in at91bootstrap. The issue was something else: SAM-BA failed to flash the bootstrap because it couldn't get the SDRAM initialized before. I still didn't figure out why. Flashing the bootstrap with barebox never got it executed. I now found out that SAM-BA is modifying one vector at runtime before flashing. What is 'endaddress of blob in RAM' becomes 'filesize of blob'. If I modify my binary bootstrap like this, I can flash it with barebox and finally have a working device again. Phew!
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