[U-Boot] Port to at91sam9g45-ekes
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
1. Use some other smaller bootloader to boot u-boot. 2. Use a tiny version of u-boot to boot the real u-boot. 3. Use pieces u-boot, e.g. by replacing start_armboot
... or should I just use man fantasy? ;-)
Regards,
Morten Kristiansen
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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...
- 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.
- Use a tiny version of u-boot to boot the real u-boot.
We don't have that (yet) for AT91.
- 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
participants (2)
-
Morten Kristiansen -
Reinhard Meyer