[U-Boot] RAM memory verification on boot

Hi all,

I am currently using u-boot version 1.1.6 on a powerpc embedded device which have increased from 64Mbyte RAM memory to 128Mbye size length. The problem is that my device does not recognize the 128Mbyte keeping the original 64Mbyte length. Does anyone know how to let u-boot and the linux bsp to recognize the new memory length?

Thanks in advance and best regards

Ethan