On 22/03/2012 15:48, Züger Martin wrote:

Dear Stefano

Hi Martin,

please do not remove the ML when you post an answer. Your experience can be helpful for other people, too.

Thank you very much for your help! I've downloaded u-boot to 0x81200000 like you told me and it works! After that, I used the U-Boot running from RAM to write u-boot-nand.bin to flash. It works too, after a reset RedBoot was gone and U-Boot started.

Fine

The base address where U-Boot is linked to for a specific board, is this always the CONFIG_SYS_NAND_U_BOOT_DST address?

Generally, they can share the same value, but they have different meaning. For TX25, the link address is set in board/karo/tx25/config.mk. However, this is the old way to do things. Currently, CONFIG_SYS_TEXT_BASE (link address) must be set into the board configuration file (tx25.h).

CONFIG_SYS_NAND_U_BOOT_DST tells the first loader (nand_spl) where u-boot code must be copied. If u-boot has a small header that must be also copied, the two address are different. On tx25, they have the same value.

Best regards, Stefano Babic