From patchwork Tue Jan 15 17:45:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Rutland X-Patchwork-Id: 1979731 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 3C4D9DF264 for ; Tue, 15 Jan 2013 17:52:08 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TvAcM-0002w3-Rd; Tue, 15 Jan 2013 17:48:11 +0000 Received: from service87.mimecast.com ([91.220.42.44]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TvAcE-0002rl-Kz for linux-arm-kernel@lists.infradead.org; Tue, 15 Jan 2013 17:48:04 +0000 Received: from cam-owa1.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Tue, 15 Jan 2013 17:48:00 +0000 Received: from localhost.localdomain ([10.1.255.212]) by cam-owa1.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.0); Tue, 15 Jan 2013 17:47:58 +0000 From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Subject: [PATCHv4 05/14] arm: arch_timer: split cntfrq accessor Date: Tue, 15 Jan 2013 17:45:22 +0000 Message-Id: <1358271931-7761-6-git-send-email-mark.rutland@arm.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1358271931-7761-1-git-send-email-mark.rutland@arm.com> References: <1358271931-7761-1-git-send-email-mark.rutland@arm.com> X-OriginalArrivalTime: 15 Jan 2013 17:47:59.0008 (UTC) FILETIME=[75052A00:01CDF348] X-MC-Unique: 113011517480002801 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130115_124803_513682_14EBD366 X-CRM114-Status: UNSURE ( 9.11 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [91.220.42.44 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Mark Rutland , c.dall@virtualopensystems.com, Marc.Zyngier@arm.com, catalin.marinas@arm.com, sboyd@codeaurora.org, Will.Deacon@arm.com, santosh.shilimkar@ti.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 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 The CNTFRQ register is not duplicated for physical and virtual timers, and accessing it as if it were is confusing. Instead, use a separate accessor which doesn't take the access type as a parameter. Signed-off-by: Mark Rutland Acked-by: Catalin Marinas Acked-by: Marc Zyngier Acked-by: Santosh Shilimkar --- arch/arm/kernel/arch_timer.c | 16 +++++++++------- 1 files changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c index eb78f43..f31c9ee 100644 --- a/arch/arm/kernel/arch_timer.c +++ b/arch/arm/kernel/arch_timer.c @@ -51,8 +51,7 @@ static bool arch_timer_use_virtual = true; #define ARCH_TIMER_CTRL_IT_STAT (1 << 2) #define ARCH_TIMER_REG_CTRL 0 -#define ARCH_TIMER_REG_FREQ 1 -#define ARCH_TIMER_REG_TVAL 2 +#define ARCH_TIMER_REG_TVAL 1 #define ARCH_TIMER_PHYS_ACCESS 0 #define ARCH_TIMER_VIRT_ACCESS 1 @@ -101,9 +100,6 @@ static inline u32 arch_timer_reg_read(const int access, const int reg) case ARCH_TIMER_REG_TVAL: asm volatile("mrc p15, 0, %0, c14, c2, 0" : "=r" (val)); break; - case ARCH_TIMER_REG_FREQ: - asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val)); - break; } } @@ -121,6 +117,13 @@ static inline u32 arch_timer_reg_read(const int access, const int reg) return val; } +static inline u32 arch_timer_get_cntfrq(void) +{ + u32 val; + asm volatile("mrc p15, 0, %0, c14, c0, 0" : "=r" (val)); + return val; +} + static inline u64 arch_counter_get_cntpct(void) { u64 cval; @@ -253,8 +256,7 @@ static int arch_timer_available(void) u32 freq; if (arch_timer_rate == 0) { - freq = arch_timer_reg_read(ARCH_TIMER_PHYS_ACCESS, - ARCH_TIMER_REG_FREQ); + freq = arch_timer_get_cntfrq(); /* Check the timer frequency. */ if (freq == 0) {