Dual G3's in Umax S900?

[Robert E Brose II]

User Benjamin Herrenschmidt says:
> >> No. Doing SMP with G3s is a terrible nightmare as those CPUs don't
> >> have the necessary coherency protocols.
> >>
> >Is MEI not enough for Linux? Instruction cache coherency problems? Or is it
> >because of the rudimentary implementation of tlbie/tlbia? Just curious.
>
> I don't have all in mind, from memory, the lack of bus broadcast for tlbie
> is one, the lack of bus coherency for cache inval is another, but I am not
> sure.
>
> I think in the past, we used to have BeBox (dual 603) working, which I suppose
> is pretty similar, but still hell. No way I support that for pmac kernels.
>
> Ben.

I assume then that the 604e has what's needed because IBM has RS6ks with
multiples of these??

Bob
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