Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757484AbYGHMlg (ORCPT ); Tue, 8 Jul 2008 08:41:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753521AbYGHMlY (ORCPT ); Tue, 8 Jul 2008 08:41:24 -0400 Received: from 238.225.broadband7.iol.cz ([88.102.225.238]:27500 "EHLO monstr.eu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753422AbYGHMlW (ORCPT ); Tue, 8 Jul 2008 08:41:22 -0400 From: monstr@monstr.eu To: linux-kernel@vger.kernel.org Cc: monstr@seznam.cz, 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, vapier.adi@gmail.com, alan@lxorguk.ukuu.org.uk, hpa@zytor.com, lethal@linux-sh.org, florian@openwrt.org, Michal Simek Subject: [PATCH 21/58] microblaze_v5: heartbeat file Date: Tue, 8 Jul 2008 13:59:21 +0200 Message-Id: X-Mailer: git-send-email 1.5.4.GIT In-Reply-To: <875ba2708f6cd3c585e4d965142e2feb07c39a0e.1215517976.git.monstr@monstr.eu> References: <1215518398-5057-1-git-send-email-monstr@monstr.eu> <80a2e46f2fb93812ab12bf79c703e8e2d6b0faa0.1215517976.git.monstr@monstr.eu> <58f35f498bac29e7105c589c06567e86c5a42dd5.1215517976.git.monstr@monstr.eu> <810775b1bb678003923039726a9153ee34fb67b4.1215517976.git.monstr@monstr.eu> <2a24e5bc2cfbd349613ef10c716a28f04ce24a9f.1215517976.git.monstr@monstr.eu> <3171c5cf21eefc79665165f4a14bc5b68dd03f95.1215517976.git.monstr@monstr.eu> <9be4eff2f4d015023c453eaec3b3473a44380491.1215517976.git.monstr@monstr.eu> <4409daf2ac356e902a8f091bb5908eb8a90218bc.1215517976.git.monstr@monstr.eu> <1f9a1f345caa749cb630cf85f95f217366395069.1215517976.git.monstr@monstr.eu> <59d7e0a5f38b8d38f01f357a071fc93eed36f3a8.1215517976.git.monstr@monstr.eu> <143afcf84af583ab66da7e8acfc9eb03b7f3eaa0.1215517976.git.monstr@monstr.eu> <2aa1ac7891af57959237aae3addf4bbe607f55d7.1215517976.git.monstr@monstr.eu> <875ba2708f6cd3c585e4d965142e2feb07c39a0e.1215517976.git.monstr@monstr.eu> In-Reply-To: <80a2e46f2fb93812ab12bf79c703e8e2d6b0faa0.1215517976.git.monstr@monstr.eu> References: <80a2e46f2fb93812ab12bf79c703e8e2d6b0faa0.1215517976.git.monstr@monstr.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1769 Lines: 58 From: Michal Simek Acked-by: Stephen Neuendorffer 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/