From patchwork Thu Sep 13 15:03:34 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 1453081 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (unknown [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id A9104DF24C for ; Thu, 13 Sep 2012 15:19:33 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TCB1v-0003Mm-A9; Thu, 13 Sep 2012 15:08:35 +0000 Received: from mail-pz0-f49.google.com ([209.85.210.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TCB0E-0002LS-Vl for linux-arm-kernel@lists.infradead.org; Thu, 13 Sep 2012 15:06:52 +0000 Received: by mail-pz0-f49.google.com with SMTP id q27so417124daj.36 for ; Thu, 13 Sep 2012 08:06:50 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=tvYWsK/dU8UJVmIG9wn3l+POQTaiYI0mxeqyr0f3WaI=; b=V9J01QOLn8PeqT/G1hApxYn7w4ZQLV/HqWdl2iJzDaDaoBYcyFy5vmqBFQuG1CvPkS LATtLtQ/T4XntuLv4oa9P2B2eGU+fzVHxOyt+fCC3tgQMY//PcWUfEZ1LP4YgiA5C4K9 bPXaCfxHreMa6kO4+msMcgNfUi0iupbioQEnKWqRpariNHQgGzeNq58P0cL/9X+mjdTi /4GbnsGy/O/bE7HL3z6pPtFdcobXbbaUxe9oMZX6cb49Evgkpj9HaJuJvHe60m5mgkUz G61otycIrTa83lNR7gspGygzvMWDgJDE/1qm6EQHW8OnYCqfkCQ+I73YUi5Z/b/Mka0q FSpg== Received: by 10.66.85.71 with SMTP id f7mr3928565paz.5.1347548810584; Thu, 13 Sep 2012 08:06:50 -0700 (PDT) Received: from localhost (c-71-204-165-222.hsd1.ca.comcast.net. [71.204.165.222]) by mx.google.com with ESMTPS id kj10sm7038406pbc.72.2012.09.13.08.06.48 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 13 Sep 2012 08:06:49 -0700 (PDT) From: Anton Vorontsov To: Andrew Morton , Russell King , Jason Wessel , Greg Kroah-Hartman , Alan Cox Subject: [PATCH 10/11] ARM: VIC: Add a couple of low-level FIQ management helpers Date: Thu, 13 Sep 2012 08:03:34 -0700 Message-Id: <1347548615-18227-10-git-send-email-anton.vorontsov@linaro.org> X-Mailer: git-send-email 1.7.11.5 In-Reply-To: <20120913150133.GA16238@lizard> References: <20120913150133.GA16238@lizard> X-Gm-Message-State: ALoCoQnutlDKZVFz/d/ThHMZ7V4B6RIpeg6xSP99V402pdVuj1G71/fPEHLrYFpotUzouz5VNIQA X-Spam-Note: CRM114 invocation failed 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 [209.85.210.49 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: linaro-kernel@lists.linaro.org, patches@linaro.org, Brian Swetland , linux-kernel@vger.kernel.org, =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , John Stultz , linux-serial@vger.kernel.org, Colin Cross , kgdb-bugreport@lists.sourceforge.net, Thomas Gleixner , kernel-team@android.com, linux-arm-kernel@lists.infradead.org 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 Just a couple of calls to manage VIC FIQ routing. We'll use them for KGDB FIQ support on ARM Versatile machines. Signed-off-by: Anton Vorontsov --- arch/arm/common/vic.c | 28 ++++++++++++++++++++++++++++ arch/arm/include/asm/hardware/vic.h | 2 ++ 2 files changed, 30 insertions(+) diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c index e0d5388..df2fc82 100644 --- a/arch/arm/common/vic.c +++ b/arch/arm/common/vic.c @@ -66,6 +66,34 @@ static struct vic_device vic_devices[CONFIG_ARM_VIC_NR]; static int vic_id; +static void __iomem *vic_base(struct irq_data *d) +{ + return (void __iomem *)irq_data_get_irq_chip_data(d); +} + +void vic_fiq_select(unsigned int irq, bool on) +{ + void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data); + void __iomem *sel = base + VIC_INT_SELECT; + u32 msk = 1 << irq; + u32 val; + + pr_debug("rerouting VIC vector %d to %s\n", irq, on ? "FIQ" : "IRQ"); + + val = readl(sel); + val &= ~msk; + if (on) + val |= msk; + writel(val, sel); +} + +bool vic_is_fiq_rised(unsigned int irq) +{ + void __iomem *base = vic_base(&irq_to_desc(irq)->irq_data); + + return readl(base + VIC_FIQ_STATUS) & (1 << irq); +} + /** * vic_init2 - common initialisation code * @base: Base of the VIC. diff --git a/arch/arm/include/asm/hardware/vic.h b/arch/arm/include/asm/hardware/vic.h index e14af1a..2728975 100644 --- a/arch/arm/include/asm/hardware/vic.h +++ b/arch/arm/include/asm/hardware/vic.h @@ -52,6 +52,8 @@ void __vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources, void vic_init(void __iomem *base, unsigned int irq_start, u32 vic_sources, u32 resume_sources); int vic_of_init(struct device_node *node, struct device_node *parent); void vic_handle_irq(struct pt_regs *regs); +void vic_fiq_select(unsigned int irq, bool on); +bool vic_is_fiq_rised(unsigned int irq); #endif /* __ASSEMBLY__ */ #endif