Andrew Fleming writes:
>
> On Monday, Mar 10, 2003, at 20:14 US/Central, Segher Boessenkool wrote:
>
> > Albert Cahalan wrote:
> >> On Sun, 2003-03-09 at 22:50, Segher Boessenkool wrote:
> >>> Benjamin Herrenschmidt wrote:
> >>>> Beware though that some G4s have a nasty bug that
> >>>> prevents using the performance counter interrupt
> >>>> (and the thermal interrupt as well).
> >>>
> >>> MPC7400 version 1.2 and lower have this problem.
> >> MPC7410 you mean, right? Are those early revisions
> >> even popular?
> >
> > 7400 and 7410 core versions are identical, afaik. I don't
> > think any 7410 core lower than version 2.0 was ever used
> > in any consumer machines. ymmv.
>
> I've been looking into this, and all versions of the 7410 before 1.3
> (where it was fixed) have this errata. And there is no version of the
> 7410 above 1.4. Some of the machines with 7410s, and all of the
> machines with 7400s have this problem, I believe.
Is this bug restricted to 7400/7410 only, or does it affect the
750 (and relatives) and 604/604e too?
I'm thinking about ppc support for my perfctr driver, and whether
overflow interrupts are worth supporting or not given the errata.
/Mikael
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This archive was generated by hypermail 2b29 : Sat Mar 15 2003 - 22:00:28 EST