Re: [PATCH][MIPS] Use CP0 Count register to implement more granular ndelay

[Ralf Baechle <ralf@linux-mips.org>]

On Fri, Mar 13, 2009 at 10:29:07AM +0100, Thomas Bogendoerfer wrote:

> > +config MIPS4
> > +   bool
> > +   default y if CPU_R8000 || CPU_R10000
> > +
> 
> what about all the R5k CPUs ?

There is cpu_has_counter which return if a processor actually has a cp0
counter.  Also cpu_has_mfc0_count_bug() which indicates usability of
the counter.  The cp0 counter should rather not be used on early R4000
processors, for example.

  Ralf