check MMU state

Thomas Gleixner tglx at
Sun Apr 6 02:15:40 EST 2003

On Saturday 05 April 2003 16:49, Benjamin Herrenschmidt wrote:
> > Is there a clean way to check, if the MMU is enabled on kernel entry ? I
> > have to port Linux to a PMC-module, where the bootloader code should not
> > be changed.
> The kernel entry can cope with both cases, provided that early_init
> properly returns the physical address where the kernel is loaded,
> regardless of the translations setup by the bootloader. Also, the
> kernel has to be contiguous in physical memory.
I don't reach early_init. The CPU is a 860 and I'm using 2.4.20-ben8. I get
lost in initial_mmu. If I turn off the mmu before "bl initial_mmu" everything
is fine.

linutronix - competence in embedded & realtime linux
mail: tglx at

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