[U-Boot] Port to at91sam9g45-ekes
Reinhard Meyer
u-boot at emk-elektronik.de
Wed Dec 8 20:47:57 CET 2010
Dear Morten Kristiansen,
> Hi U-boot members. I have ported u-boot to the AT91SAM9G45-EKES board. I
> have, however, run into a little problem. The internal boot-ROM in the
> SAM9G45 processor only accepts boot-loaders up to 60K and the loader I have
> is already 70K. I therefore need an chainloader in between. Is there a
> recommended approach for this, something like
You are likely to end near 200k...
>
> 1. Use some other smaller bootloader to boot u-boot.
That would usually be AT91BOOTSTRAP, which initializes SDRAM and loads software
from NAND, SPI, MMC etc.
> 2. Use a tiny version of u-boot to boot the real u-boot.
We don't have that (yet) for AT91.
> 3. Use pieces u-boot, e.g. by replacing start_armboot
Are you using current u-boot, like at least the released 2010.09 ?
Regards,
Reinhard
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