Date: Fri, 10 Jan 2003 13:25:19 -0500 (EST) From: John Baldwin <jhb@FreeBSD.org> To: Attila Nagy <bra@fsn.hu> Cc: cvs-all@freebsd.org, cvs-committers@freebsd.org, Alexey Dokuchaev <danfe@nsu.ru> Subject: Re: cvs commit: src/sys/i386/i386 identcpu.c Message-ID: <XFMail.20030110132519.jhb@FreeBSD.org> In-Reply-To: <Pine.LNX.4.50.0301101857320.510-100000@scribble.fsn.hu>
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On 10-Jan-2003 Attila Nagy wrote:
> Hello,
>
>> > Well it now distinguish *real* PIII and Celeron (if it's ever possible)?
>> The kernel can only tell what the CPU tells it. :)
> Don't bite me, but leenuks can do it.
> AFAIK this is the magic:
>
> /* Names for the Pentium II/Celeron processors
> detectable only by also checking the cache size.
> Dixon is NOT a Celeron. */
> if (c->x86 == 6) {
> switch (c->x86_model) {
> case 5:
> if (l2 == 0)
> p = "Celeron (Covington)";
> if (l2 == 256)
> p = "Mobile Pentium II (Dixon)";
> break;
>
> case 6:
> if (l2 == 128)
> p = "Celeron (Mendocino)";
> break;
>
> case 8:
> if (l2 == 128)
> p = "Celeron (Coppermine)";
> break;
> }
> }
>
> if ( p )
> strcpy(c->x86_model_id, p);
>
>
> The above is from arch/i386/kernel/setup.c
We used to use similar tricks but turned it off b/c it was not deemed
to be worth the extra effort. :) The brand index stuff only works on
Pentium III's and above btw.
--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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