Hi

2009/7/8 Ulrich Gerster gersteru@dhbw-loerrach.de:

Hello,

I have a board with a i.MX31, NAND-Flash and RAM. On the Board a RedBoot is preinstalled and runs properly. I want to replace the RedBoot with my U-Boot port.

How can I test U-Boot out of RedBoot when I load the u-boot image in the RAM? What do I have to configure in my u-boot if i want to test it from ram before burning it into the nand flash?

You should define CONFIG_SKIP_LOWLEVEL_INIT since redboot has already setup the SDRAM. If you load U-boot to the address it's set up to execute from you should also define CONFIG_SKIP_RELOCATE_UBOOT.

It's been a long while since I used redboot to start u-boot (on the i.MX31 PDK) so I don't remember the correct redboot command but make sure the MMU is off when jumping to U-Boot.

Regards, Magnus