dcbz works on 862 everywhere!

[Joakim Tjernlund]

> Joakim Tjernlund wrote:
>
> > I am still intrested in trying copy-on-write but I can't figure out
> > how. Is it a big job? Any pointers?
>
> The 8xx properly implements copy-on-write now.  I don't remember when
> I updated this, maybe somewhere in the mid 2.3.xxx timeframe.  All of
> the processor specific MM functions have to be changed, it isn't
> something that is likely going to be a configuration option. due to
> all of the common #define, macros, and page table functions.  It
> does remove three instructions and a branch from the TLBmiss handler :-)

Ahh, that explanins why I had such a hard time trying to find
where it didn't do copy-on-write :-)

 Thanks
         Jocke


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