From patchwork Wed May 25 16:49:57 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 816672 Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4PGqg2S014819 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 25 May 2011 16:53:03 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by bombadil.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QPHIC-0002eq-BP; Wed, 25 May 2011 16:50:44 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1QPHIA-0004LX-RS; Wed, 25 May 2011 16:50:42 +0000 Received: from service87.mimecast.com ([94.185.240.25]) by canuck.infradead.org with smtp (Exim 4.76 #1 (Red Hat Linux)) id 1QPHHj-0004Ih-Tq for linux-arm-kernel@lists.infradead.org; Wed, 25 May 2011 16:50:16 +0000 Received: from cam-owa2.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Wed, 25 May 2011 17:50:14 +0100 Received: from localhost.localdomain ([10.1.255.212]) by cam-owa2.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 25 May 2011 17:50:04 +0100 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH v3 02/13] ARM: smp: add interrupt handler for local timers Date: Wed, 25 May 2011 17:49:57 +0100 Message-Id: <1306342208-32754-3-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1306342208-32754-1-git-send-email-marc.zyngier@arm.com> References: <1306342208-32754-1-git-send-email-marc.zyngier@arm.com> X-OriginalArrivalTime: 25 May 2011 16:50:04.0447 (UTC) FILETIME=[CBC17AF0:01CC1AFB] X-MC-Unique: 111052517501401701 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110525_125016_194356_8901894E X-CRM114-Status: GOOD ( 10.43 ) X-Spam-Score: -0.7 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [94.185.240.25 listed in list.dnswl.org] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Wed, 25 May 2011 16:53:03 +0000 (UTC) Provide a "normal" interrupt handler for local timers. It is expected that most timer implementations will use this handler unless they have more specific requirements. Signed-off-by: Marc Zyngier --- arch/arm/include/asm/localtimer.h | 6 ++++++ arch/arm/kernel/smp.c | 12 ++++++++++++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/arch/arm/include/asm/localtimer.h b/arch/arm/include/asm/localtimer.h index 080d74f..bef44b3 100644 --- a/arch/arm/include/asm/localtimer.h +++ b/arch/arm/include/asm/localtimer.h @@ -10,6 +10,8 @@ #ifndef __ASM_ARM_LOCALTIMER_H #define __ASM_ARM_LOCALTIMER_H +#include + struct clock_event_device; /* @@ -22,6 +24,10 @@ void percpu_timer_setup(void); */ asmlinkage void do_local_timer(struct pt_regs *); +/* + * Per-cpu timer IRQ handler + */ +irqreturn_t percpu_timer_handler(int irq, void *dev_id); #ifdef CONFIG_LOCAL_TIMERS diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index d439a8f..2c85941 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -459,6 +459,18 @@ asmlinkage void __exception_irq_entry do_local_timer(struct pt_regs *regs) set_irq_regs(old_regs); } +irqreturn_t percpu_timer_handler(int irq, void *dev_id) +{ + struct clock_event_device *evt = dev_id; + + if (local_timer_ack()) { + evt->event_handler(evt); + return IRQ_HANDLED; + } + + return IRQ_NONE; +} + void show_local_irqs(struct seq_file *p, int prec) { unsigned int cpu;