Rick Brown wrote:
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?
It is Linux. u-boot uses the flat memory system.
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?)?
yes. MMU is not turned on in u-boot
compare the data sheet and head_32.S for powerpc arch to know how the
MMU is initialized .
Or is it that kernel always gets the control with MMU on on PPC systems?
How about other architectures?
Thanks,
Rick
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Regards,
Mohamed Thalib H
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