On Tue, Oct 10, 2000 at 11:25:41AM +0900, Noriyuki Soda wrote:
> > Me and Maki have hit a dead end in our work.  Basically, we are
> > seeing clock interrupts (INT4) *before* the clock is being enabled
> > by initclock().  This is what's causing _splnone() to hang in
> > cpu_configure().  When it enables all interrupts, so many clock
> > interrupts have been queued up as to overflow and hang the kernel.
> 
> Hmmm.
> Maybe..., not only R4030_SYS_EXT_IMASK, but also R4030_SYS_IT_STAT
> might work differently in the Magnum 4000SC.
> If so, pica/picabus.c:pica_clkintr() cannot clear clock interrupt,
> and this describes the reason why clock interrupts hang the kernel.
> --
> soda

Exactly.  This is a strong possibility right now.  Do you have any way of
verifying the technical specs?

Thanks!
-Mark