> >> In that case, your core is a 4Kc and not a 4KEc.
> >
> > Not quite true, early revisions of the 4KEc were only release 1. This
> > seems to be a bug in arch/mips/cpu-probe.c:
> >
> > static inline void cpu_probe_mips(struct cpuinfo_mips *c)
> > {
> > decode_configs(c);
> > switch (c->processor_id & 0xff00) {
> > case PRID_IMP_4KC:
> > c->cputype = CPU_4KC;
> > break;
> > case PRID_IMP_4KEC:
> > c->cputype = CPU_4KEC;
> > break;
> > case PRID_IMP_4KECR2:
> > c->cputype = CPU_4KEC;
> > break;
> > ...
> >
> > The type for PRID_IMP_4KEC should be CPU_4KC.
> >
> >
>
> Maybe the probing code should read the ISA revision level from the AR
> bits (12:10) of the Config0 register to figure out which revision of the
> ISA is implemented.
It does. c->cputype isn't what needs to be modulated here, it's c->isa_level,
which gets decoded as part of decode_configs(), as near as I can tell correctly
in the most recent source tree I've got. And it's isa_level that's being tested
by the cpu_has_mips32r2 et. al. macros.
Regards,
Kevin K.
