[U-Boot-Users] u-boot r1 machine type value to AT91RM9200 2.6.12 kernel

Hello, I tried to use the linux 2.6.12 release for AT91RM9200, but when I started with u-boot 1.1.2 the Kernel stopped. I can configure a working kernel with the option 'config NAKED_Boot= y ', but with this option it's not possible to pass any bootarguments to the kernel. How can I pass the corret R1 value for the machine type ('0xfb') from u-boot 1.1.2 to the kernel? The last working kernel in combination with u-boot was 2.6.12rc4. What changes in the u-boot source do I have to maintain relating to these boot options? Or is it possible to pass the r1 value in between the 'bootargs' of the u-boot enviroment?

Any help would be appreciated Regards Sascha