Re: [patch] oprofile for ppc

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