From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262329AbUHULx0 (ORCPT ); Sat, 21 Aug 2004 07:53:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262450AbUHULx0 (ORCPT ); Sat, 21 Aug 2004 07:53:26 -0400 Received: from smtprelay02.uni-oldenburg.de ([134.106.40.86]:3968 "EHLO smtprelay02.uni-oldenburg.de") by vger.kernel.org with ESMTP id S262329AbUHULxW (ORCPT ); Sat, 21 Aug 2004 07:53:22 -0400 Date: Sat, 21 Aug 2004 13:53:16 +0200 From: matthias brill To: Alan Cox , Jeremy Fitzhardinge Cc: linux-kernel , cpufreq list Subject: Re: banias with different (unusual?) model_name Message-ID: <20040821115316.GA2582@akamail.com> Reply-To: matthias.brill@akamail.com References: <20040820093344.GA2923@akamail.com> <1093008335.30968.32.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="cNdxnHkX5QqsyA0e" Content-Disposition: inline In-Reply-To: <1093008335.30968.32.camel@localhost.localdomain> X-Conspiracy: there is no conspiracy User-Agent: Mutt/1.5.6+20040803i X-PMX-Version: 4.6.1.107272, Antispam-Core: 4.6.1.106808, Antispam-Data: 2004.8.20.110968 X-PerlMx-Spam: Gauge=IIIIIII, Probability=7%, Report='__TO_MALFORMED_2 0, __HAS_MSGID 0, __SANE_MSGID 0, __REFERENCES 0, __MIME_VERSION 0, __CT 0, __CTYPE_HAS_BOUNDARY 0, __CTYPE_MULTIPART 0, __CD 0, __IN_REP_TO 0, __USER_AGENT 0, EMAIL_ATTRIBUTION 0, QUOTED_EMAIL_TEXT 0, SIGNATURE_SHORT_DENSE 0, REFERENCES 0.000, IN_REP_TO 0, USER_AGENT 0.000' Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --cNdxnHkX5QqsyA0e Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable hi alan, jeremy On Fri, Aug 20, 2004 at 02:25:36PM +0100, Alan Cox wrote: > > i've found a pentium-m banias which reports "Mobile Genuine Intel(R) > > processor 1400MHz" in /proc/cpuinfo. this (strange?) signature > > prevents speedstep-centrino.c from working properly. >=20 > Signatures appear to be BIOS set so that would make sense. that fact wasn't obvious to me -- i've updated the BIOS and the strange banias signature is now gone. it reports the expected "Intel(R) Pentium(R) M processor 1400MHz" string now. in excess the "ACPI-behaviour" changes from "totally broken" to "not working" which is kind of a progress... 8-} On Fri, Aug 20, 2004 at 07:19:31PM -0700, Jeremy Fitzhardinge wrote: > Yeah, there seem to be a few of these around. I'm just not certain that > they're identical to "normal" Banias as far as operating points go. it seems that the reported value depends on the mental health of the BIOS-programmer at hand, therefore the suplied string might not be trustworthy. if i understand correctly, the type of the cpu can be determined by looking at the family, model and stepping -- assuming that these values are reported directly by the CPUID (0FA2) instruction.=20 the BIOS supplied model_name string in speedstep-centrino.c is parsed to get the clock cycle time of the cpu. is this actually supposed to be the "right" way (or worse: the only way) to get this information? thias --=20 Matthias Brill --cNdxnHkX5QqsyA0e Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) iD8DBQFBJzes15PQg+xdZ4cRAjSeAJ9VmtjiMrdtbNl/3kWXDfWuakjM0QCg32V4 3YG4FoaJu2AQ715gSyNxZ4A= =7430 -----END PGP SIGNATURE----- --cNdxnHkX5QqsyA0e--