On Wed, 20 Dec 2006 17:29:25 +0300, Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx> wrote:
> > How about this? You should still fix pnx8550_hpt_read() anyway, but I
> > suppose gettimeofday() on PNX8550 was broken long time.
>
> And nobody noticed. :-)
I changed my mind a bit. The pre-clocksource gettimeofday() might
work well on PNX8550. There was timerlo variable which hold COUNT
value on last timer interrupt and fixed_gettimeoffset() subtracted
timerlo from COUNT value at the time.
On Wed, 20 Dec 2006 17:29:25 +0300, Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx> wrote:
> > +static cycle_t pnx8550_hpt_read(void)
> > +{
> > + /* FIXME: we should use timer2 or timer3 as freerun counter */
> > + return read_c0_count();
> > +}
>
> I'd suggest read_c0_count2() here, possibly adding an interrupt
> handler for it since it will interrupt upon hitting compare2
> reg. value (but we could probably just mask the IRQ off), and
> enabling the timer 2, of course (the current code disables it)...
It would be right direction. And we should set set count2 frequency
to mips_hpt_frequency. But I cannot test it by myself so I'd like to
leave it for others. Good exercise ;)
---
Atsushi Nemoto
