From patchwork Tue Nov 6 04:57:25 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 1702851 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 5CB243FCF7 for ; Tue, 6 Nov 2012 04:59:53 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TVbEf-00072j-LW; Tue, 06 Nov 2012 04:58:01 +0000 Received: from kirsty.vergenet.net ([202.4.237.240]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TVbEK-0006x9-TX for linux-arm-kernel@lists.infradead.org; Tue, 06 Nov 2012 04:57:42 +0000 Received: from ayumi.akashicho.tokyo.vergenet.net (p6117-ipbfp1901kobeminato.hyogo.ocn.ne.jp [114.172.117.117]) by kirsty.vergenet.net (Postfix) with ESMTP id 90BC025BFC9; Tue, 6 Nov 2012 15:57:36 +1100 (EST) Received: by ayumi.akashicho.tokyo.vergenet.net (Postfix, from userid 7100) id 36140EDE5BF; Tue, 6 Nov 2012 13:57:35 +0900 (JST) From: Simon Horman To: Arnd Bergmann , Olof Johansson Subject: [PATCH 03/11] ARM: shmobile: emev2: Replace modify_scu_cpu_psr with scu_power_mode Date: Tue, 6 Nov 2012 13:57:25 +0900 Message-Id: <1352177853-6008-4-git-send-email-horms@verge.net.au> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1352177853-6008-1-git-send-email-horms@verge.net.au> References: <1352177853-6008-1-git-send-email-horms@verge.net.au> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20121105_235741_702597_DFC6696B X-CRM114-Status: GOOD ( 16.17 ) X-Spam-Score: -3.3 (---) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-3.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [202.4.237.240 listed in list.dnswl.org] -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: arm@kernel.org, Simon Horman , linux-sh@vger.kernel.org, Magnus Damm , Bastian Hecht , Paul Mundt , linux-arm-kernel@lists.infradead.org, Bastian Hecht 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 From: Bastian Hecht We can remove the extra code of modify_scu_cpu_psr() and use the cleaner generic ARM helper scu_power_mode(). As every CPU only deals with its own power register and scu_power_mode() operates with 8-bit accesses, we save the locking overhead too. Signed-off-by: Bastian Hecht Signed-off-by: Simon Horman --- arch/arm/mach-shmobile/smp-emev2.c | 22 ++-------------------- 1 file changed, 2 insertions(+), 20 deletions(-) diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c index f674562..535426c 100644 --- a/arch/arm/mach-shmobile/smp-emev2.c +++ b/arch/arm/mach-shmobile/smp-emev2.c @@ -32,24 +32,8 @@ #define EMEV2_SCU_BASE 0x1e000000 -static DEFINE_SPINLOCK(scu_lock); static void __iomem *scu_base; -static void modify_scu_cpu_psr(unsigned long set, unsigned long clr) -{ - unsigned long tmp; - - /* we assume this code is running on a different cpu - * than the one that is changing coherency setting */ - spin_lock(&scu_lock); - tmp = readl(scu_base + 8); - tmp &= ~clr; - tmp |= set; - writel(tmp, scu_base + 8); - spin_unlock(&scu_lock); - -} - static unsigned int __init emev2_get_core_count(void) { if (!scu_base) { @@ -95,7 +79,7 @@ static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct * cpu = cpu_logical_map(cpu); /* enable cache coherency */ - modify_scu_cpu_psr(0, 3 << (cpu * 8)); + scu_power_mode(scu_base, 0); /* Tell ROM loader about our vector (in headsmp.S) */ emev2_set_boot_vector(__pa(shmobile_secondary_vector)); @@ -106,12 +90,10 @@ static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct * static void __init emev2_smp_prepare_cpus(unsigned int max_cpus) { - int cpu = cpu_logical_map(0); - scu_enable(scu_base); /* enable cache coherency on CPU0 */ - modify_scu_cpu_psr(0, 3 << (cpu * 8)); + scu_power_mode(scu_base, 0); } static void __init emev2_smp_init_cpus(void)