From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 13 Jun 2001 08:36:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 13 Jun 2001 08:35:57 -0400 Received: from scan2.fhg.de ([153.96.1.37]:652 "EHLO scan2.fhg.de") by vger.kernel.org with ESMTP id ; Wed, 13 Jun 2001 08:35:46 -0400 Date: Wed, 13 Jun 2001 14:35:37 +0200 From: Sven Geggus To: linux-kernel@vger.kernel.org Subject: Changing CPU Speed while running Linux Message-ID: <20010613143536.A1323@iitb.fhg.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.3.17i X-giggls-priority: very high :P Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi there, on my Elan410 based System it is very easy to change the CPU clock speed by means od two outb commands. I was wondering, if it does some harm to the Kernel if the CPU is reprogrammed using a different CPU clock speed, while the system is up and running. If so, is there a possibility to tell the Kernel that the clock speed has been changed by means of a particular Kernel call? If not, where would I put some code to do this at system boot? Is /usr/src/linux/arch/i386/boot/setup.S the right place for something like this? Thanks for hints Sven -- Sven Geggus @ Fraunhofer IITB, Karlsruhe (http://wsd.iitb.fhg.de/) Phone: +49 721 6091-422, Fax: +49 721 6091-213 Linux powered DATA aquisition and evaluation, embedded systems, combustion engine diagnosis