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SubjectRe: APIC and some timers stuff

On Thu, 24 Feb 2000, Artur Skawina wrote:

> > same. But the local APIC can be disabled on RESET in Pentium chips and by
> > software means on P6 CPUs. Once disabled it cannot be enabled till the
> > next RESET.
>
> p6_enable_apic()
> {
> unsigned rl, rh;
>
> rdmsr( 27, rl, rh );
> wrmsr( 27, rl^(1<<11), rh );
> }

does this always work? I believe there is some pin that disables the APIC
permanently - is this really the case?

anyway, in 2.5 we can explore this stuff - right now we already have
IO-APIC on UP, and a trivial patch enables compiling APIC support but no
IO-APIC.

-- mingo


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