Hi List, I am curious to know where is the MMU turned on in a Linux PPC system - is it the u-boot or the linux kernel? Since enabling of MMU shall be the point from where the CPU will have to generate virtual addresses - I think it should be somewhere in the kernel. The reason is that all the addresses that we give on the u-boot command line are physical addresses and not virtual, right (Thus implying MMU is not turned on?)? Or is it that kernel always gets the control with MMU on on PPC systems? How about other architectures? Thanks, Rick -- To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs