Chris Gilbert <chris@dokein.co.uk> said;

> I was wondering if anyone had seen the new Arm11 based system/board yet?
> Arm mentions them:
> http://www.arm.com/armtech/ARM11PrimeXsys
> ...
> I suspect that it would need a rewrite of a fair chunk of low level
> handling code to make the best use of it (yes it's that different
> according to the above doc, but is backward comptible)  The pmap could
> really be reworked, as i think it's now using physical tagging in the
> cache.

That's the quite big move of ARM processor.  Virtual address tagged cache
is proven inadequate long time ago.  ARM camp has historically
paid little attention on how significant the cache machinary is to OS
foundation and ARM documents tend to be terse about cache systems.
I recently trapped by cache design change in 920T->926E.

Toru Nishimura/ALKYL Technology