Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762146AbYFZNDK (ORCPT ); Thu, 26 Jun 2008 09:03:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758355AbYFZMoO (ORCPT ); Thu, 26 Jun 2008 08:44:14 -0400 Received: from 238.225.broadband7.iol.cz ([88.102.225.238]:23727 "EHLO monstr.eu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1759444AbYFZMoM (ORCPT ); Thu, 26 Jun 2008 08:44:12 -0400 From: monstr@seznam.cz To: linux-kernel@vger.kernel.org Cc: arnd@arndb.de, linux-arch@vger.kernel.org, stephen.neuendorffer@xilinx.com, John.Linn@xilinx.com, john.williams@petalogix.com, matthew@wil.cx, will.newton@gmail.com, drepper@redhat.com, microblaze-uclinux@itee.uq.edu.au, grant.likely@secretlab.ca, linuxppc-dev@ozlabs.org, vapier.adi@gmail.com, alan@lxorguk.ukuu.org.uk, hpa@zytor.com, Michal Simek Subject: [PATCH 22/60] microblaze_v4: heartbeat file Date: Thu, 26 Jun 2008 14:29:51 +0200 Message-Id: <1214483429-32360-23-git-send-email-monstr@seznam.cz> X-Mailer: git-send-email 1.5.4.GIT In-Reply-To: <1214483429-32360-22-git-send-email-monstr@seznam.cz> References: <1214483429-32360-1-git-send-email-monstr@seznam.cz> <1214483429-32360-2-git-send-email-monstr@seznam.cz> <1214483429-32360-3-git-send-email-monstr@seznam.cz> <1214483429-32360-4-git-send-email-monstr@seznam.cz> <1214483429-32360-5-git-send-email-monstr@seznam.cz> <1214483429-32360-6-git-send-email-monstr@seznam.cz> <1214483429-32360-7-git-send-email-monstr@seznam.cz> <1214483429-32360-8-git-send-email-monstr@seznam.cz> <1214483429-32360-9-git-send-email-monstr@seznam.cz> <1214483429-32360-10-git-send-email-monstr@seznam.cz> <1214483429-32360-11-git-send-email-monstr@seznam.cz> <1214483429-32360-12-git-send-email-monstr@seznam.cz> <1214483429-32360-13-git-send-email-monstr@seznam.cz> <1214483429-32360-14-git-send-email-monstr@seznam.cz> <1214483429-32360-15-git-send-email-monstr@seznam.cz> <1214483429-32360-16-git-send-email-monstr@seznam.cz> <1214483429-32360-17-git-send-email-monstr@seznam.cz> <1214483429-32360-18-git-send-email-monstr@seznam.cz> <1214483429-32360-19-git-send-email-monstr@seznam.cz> <1214483429-32360-20-git-send-email-monstr@seznam.cz> <1214483429-32360-21-git-send-email-monstr@seznam.cz> <1214483429-32360-22-git-send-email-monstr@seznam.cz> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1705 Lines: 58 From: Michal Simek Signed-off-by: Michal Simek --- arch/microblaze/kernel/heartbeat.c | 35 +++++++++++++++++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-) create mode 100644 arch/microblaze/kernel/heartbeat.c diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c new file mode 100644 index 0000000..5a21c1d --- /dev/null +++ b/arch/microblaze/kernel/heartbeat.c @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2007-2008 Michal Simek + * Copyright (C) 2006 Atmark Techno, Inc. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include + +void heartbeat(void) +{ + static unsigned int cnt, period, dist; + + if (cnt == 0 || cnt == dist) + iowrite32(1, CONFIG_HEART_BEAT_ADDRESS); + else if (cnt == 7 || cnt == dist + 7) + iowrite32(0, CONFIG_HEART_BEAT_ADDRESS); + + if (++cnt > period) { + cnt = 0; + /* + * The hyperbolic function below modifies the heartbeat period + * length in dependency of the current (5min) load. It goes + * through the points f(0)=126, f(1)=86, f(5)=51, f(inf)->30. + */ + period = ((672 << FSHIFT) / (5 * avenrun[0] + + (7 << FSHIFT))) + 30; + dist = period / 4; + } +} -- 1.5.4.GIT -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/