Subject: Re: frequency scaling on a Celeron M (Dothan)?
To: None <port-i386@netbsd.org>
From: Christos Zoulas <christos@astron.com>
List: port-i386
Date: 01/17/2006 13:33:18
In article <20060117065810.GD9822@vergon.kollasch.net>,
Jonathan A. Kollasch <jakllsch@kollasch.net> wrote:
>-=-=-=-=-=-
>
>Hi,
>	According to Wikipedia this CPU doesn't have SpeedStep, yet
>under Linux the frequency scaling stuff works.  Is there documentation
>for using NetBSD's SpeedStep support?

Look in src/sys/arch/i386/i386/est.c. Linux is probably doing it by
consulting the ACPI tables (and we should do the same too).

christos

>CPU section of 2.1 dmesg
>cpu0 at mainbus0: (uniprocessor)
>cpu0: Intel Pentium Pro, II or III (686-class), 1296.83 MHz, id 0x6d6
>cpu0: features afe9fbbf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,APIC,SEP,MTRR>
>cpu0: features afe9fbbf<PGE,MCA,CMOV,PAT,CFLUSH,DS,ACPI,MMX>
>cpu0: features afe9fbbf<FXSR,SSE,SSE2,SS,TM,SBF>