On Thursday 27 September 2007 18:13, Juergen Beisert wrote:
> Index: linux-2.6.22/arch/i386/kernel/cpu/cyrix.c
> ===================================================================
> --- linux-2.6.22.orig/arch/i386/kernel/cpu/cyrix.c
> +++ linux-2.6.22/arch/i386/kernel/cpu/cyrix.c
> @@ -169,7 +169,7 @@ static void __cpuinit set_cx86_inc(void)
> setCx86(CX86_PCR1, getCx86(CX86_PCR1) | 0x02);
> /* PCR0 -- Performance Control */
> /* Incrementor Margin 10 */
> - setCx86(CX86_PCR0, getCx86(CX86_PCR0) | 0x04);
> + setCx86(CX86_PCR0, getCx86(CX86_PCR0) | 0x05); /* 300MHz CPU */
> setCx86(CX86_CCR3, ccr3); /* disable MAPEN */
> }
>
> This should be done at runtime in relation to the real CPU clock.
Has someone an idea how I can read back CPUs clock while I'm in
arch/i386/kernel/cpu/cyrix.c:set_cx86_inc() ? This incrementer setting must
be done in relation to processor's clock. We could remove this tweaking as
Marco suggested, or we must fix it to use the correct value.
Juergen
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