From patchwork Thu Jul 17 16:39:00 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Figa X-Patchwork-Id: 4577421 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2515F9F1D6 for ; Thu, 17 Jul 2014 16:42:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 589D2201BB for ; Thu, 17 Jul 2014 16:42:49 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6C56A2008F for ; Thu, 17 Jul 2014 16:42:48 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1X7ok5-0004gl-BA; Thu, 17 Jul 2014 16:41:13 +0000 Received: from mailout3.w1.samsung.com ([210.118.77.13]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1X7oj9-00031U-VO for linux-arm-kernel@lists.infradead.org; Thu, 17 Jul 2014 16:40:16 +0000 Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0N8V008QE7MFLN00@mailout3.w1.samsung.com> for linux-arm-kernel@lists.infradead.org; Thu, 17 Jul 2014 17:39:51 +0100 (BST) X-AuditID: cbfec7f5-b7f626d000004b39-81-53c7fc5700e4 Received: from eusync3.samsung.com ( [203.254.199.213]) by eucpsbgm2.samsung.com (EUCPMTA) with SMTP id 36.05.19257.75CF7C35; Thu, 17 Jul 2014 17:39:51 +0100 (BST) Received: from AMDC1227.digital.local ([106.116.147.199]) by eusync3.samsung.com (Oracle Communications Messaging Server 7u4-23.01(7.0.4.23.0) 64bit (built Aug 10 2011)) with ESMTPA id <0N8V00HDB7M9BP70@eusync3.samsung.com>; Thu, 17 Jul 2014 17:39:51 +0100 (BST) From: Tomasz Figa To: linux-samsung-soc@vger.kernel.org Subject: [PATCH v3 5/7] ARM: EXYNOS: Add .write_sec outer cache callback for L2C-310 Date: Thu, 17 Jul 2014 18:39:00 +0200 Message-id: <1405615142-21426-6-git-send-email-t.figa@samsung.com> X-Mailer: git-send-email 1.9.3 In-reply-to: <1405615142-21426-1-git-send-email-t.figa@samsung.com> References: <1405615142-21426-1-git-send-email-t.figa@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrMLMWRmVeSWpSXmKPExsVy+t/xq7rhf44HGzy8qmXxaP5jZoveBVfZ LLZ3zmC3mPJnOZPFpsfXWC0u75rDZjF7ST+LxYzz+5gsbl/mtTi3fQuLxdojd9ktXvetYbZY P+M1i8WqXX8YLfZf8XLg92hp7mHz+PZ1EovH5b5eJo9F37M8ds66y+5x59oeNo/NS+o9+ras YvQ4fmM7k8fnTXIBXFFcNimpOZllqUX6dglcGXffrGAreCtUse/QZbYGxmv8XYycHBICJhI/ nh9mhLDFJC7cW8/WxcjFISSwlFHiXMNzZginj0ni8bdlLCBVbAJqEp8bHrGB2CICqhKf2xaw gxQxCxxglriw6QFYkbBAmMT57feAijg4WICKZtwIAgnzCjhJTJx+GWqbnETvtjfMIDangLPE 3P2PwWYKAdVsaVvANIGRdwEjwypG0dTS5ILipPRcI73ixNzi0rx0veT83E2MkID+uoNx6TGr Q4wCHIxKPLw/uI4HC7EmlhVX5h5ilOBgVhLhzb4PFOJNSaysSi3Kjy8qzUktPsTIxMEp1cCo bmhoLhhoE16RFHH+fomSo2HioqoTEf3FcxZe8DqsMl/fcfsNSWP9qDi2z/tiAoSqpvCkK0/7 W1i2UodtY1xJW8RsDgfbG2kOnHGZlu9OnhbZceeAThh/+ik7rS7RW3Yca5eeUbrue/o+W/uV +Q0aqwJ0JsvnRsQlnONN8fI5zfHMlePoRSWW4oxEQy3mouJEAMVijPVGAgAA X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140717_094016_160435_67593455 X-CRM114-Status: GOOD ( 11.69 ) X-Spam-Score: -5.0 (-----) Cc: Kukjin Kim , lauraa@codeaurora.org, tony@atomide.com, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, drake@endlessm.com, loeliger@gmail.com, santosh.shilimkar@ti.com, Russell King - ARM Linux , linux-omap@vger.kernel.org, Tomasz Figa , Tomasz Figa , linux-arm-kernel@lists.infradead.org, Marek Szyprowski X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Exynos4 SoCs equipped with an L2C-310 cache controller and running under secure firmware require certain registers of aforementioned IP to be accessed only from secure mode. This means that SMC calls are required for certain register writes. To handle this, an implementation of .write_sec and .configure callbacks is provided by this patch. Signed-off-by: Tomasz Figa --- arch/arm/mach-exynos/firmware.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c index f5e626d..554b350 100644 --- a/arch/arm/mach-exynos/firmware.c +++ b/arch/arm/mach-exynos/firmware.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -120,6 +121,31 @@ static const struct firmware_ops exynos_firmware_ops = { .resume = exynos_resume, }; +static void exynos_l2_write_sec(unsigned long val, unsigned reg) +{ + switch (reg) { + case L2X0_CTRL: + if (val & L2X0_CTRL_EN) + exynos_smc(SMC_CMD_L2X0INVALL, 0, 0, 0); + exynos_smc(SMC_CMD_L2X0CTRL, val, 0, 0); + break; + + case L2X0_DEBUG_CTRL: + exynos_smc(SMC_CMD_L2X0DEBUG, val, 0, 0); + break; + + default: + WARN_ONCE(1, "%s: ignoring write to reg 0x%x\n", __func__, reg); + } +} + +static void exynos_l2_configure(const struct l2x0_regs *regs) +{ + exynos_smc(SMC_CMD_L2X0SETUP1, regs->tag_latency, regs->data_latency, + regs->prefetch_ctrl); + exynos_smc(SMC_CMD_L2X0SETUP2, regs->pwr_ctrl, regs->aux_ctrl, 0); +} + void __init exynos_firmware_init(void) { struct device_node *nd; @@ -139,4 +165,16 @@ void __init exynos_firmware_init(void) pr_info("Running under secure firmware.\n"); register_firmware_ops(&exynos_firmware_ops); + + /* + * Exynos 4 SoCs (based on Cortex A9 and equipped with L2C-310), + * running under secure firmware, require certain registers of L2 + * cache controller to be written in secure mode. Here .write_sec + * callback is provided to perform necessary SMC calls. + */ + if (IS_ENABLED(CONFIG_CACHE_L2X0) + && read_cpuid_part() == ARM_CPU_PART_CORTEX_A9) { + outer_cache.write_sec = exynos_l2_write_sec; + outer_cache.configure = exynos_l2_configure; + } }