From patchwork Thu Jun 13 09:12:24 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Courbot X-Patchwork-Id: 2715221 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 37BE4C1459 for ; Thu, 13 Jun 2013 09:19:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 27993201DE for ; Thu, 13 Jun 2013 09:19:37 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 952CB201BF for ; Thu, 13 Jun 2013 09:19:34 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Un3dk-0004zf-Fg; Thu, 13 Jun 2013 09:16:23 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Un3bR-0006Zu-J2; Thu, 13 Jun 2013 09:13:57 +0000 Received: from hqemgate03.nvidia.com ([216.228.121.140]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Un3ay-0006VT-Pk for linux-arm-kernel@lists.infradead.org; Thu, 13 Jun 2013 09:13:30 +0000 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate03.nvidia.com id ; Thu, 13 Jun 2013 02:20:09 -0700 Received: from hqemhub03.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Thu, 13 Jun 2013 02:13:07 -0700 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 13 Jun 2013 02:13:07 -0700 Received: from percival.nvidia.com (172.20.144.16) by hqemhub03.nvidia.com (172.20.150.15) with Microsoft SMTP Server (TLS) id 8.3.298.1; Thu, 13 Jun 2013 02:13:06 -0700 From: Alexandre Courbot To: Stephen Warren , Joseph Lo , Karan Jhavar , Varun Wadekar , Chris Johnson , Matthew Longnecker , Russell King - ARM Linux , Tomasz Figa , Dave Martin , Jassi Brar Subject: [PATCH v2 2/3] ARM: tegra: split setting of CPU reset handler Date: Thu, 13 Jun 2013 18:12:24 +0900 Message-ID: <1371114745-24710-3-git-send-email-acourbot@nvidia.com> X-Mailer: git-send-email 1.8.3 In-Reply-To: <1371114745-24710-1-git-send-email-acourbot@nvidia.com> References: <1371114745-24710-1-git-send-email-acourbot@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130613_051329_152826_FC075BFE X-CRM114-Status: GOOD ( 11.85 ) X-Spam-Score: -7.1 (-------) Cc: gnurou@gmail.com, devicetree-discuss@lists.ozlabs.org, linux-kernel@vger.kernel.org, Alexandre Courbot , linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 Not all Tegra devices need to set the CPU reset handler in the same way. In particular, devices using a TrustZone secure monitor cannot set the reset handler directly and need to do it through a firmware operation. This patch separates the act of setting the reset handler from its preparation, so the former can be implemented in a different way. Signed-off-by: Alexandre Courbot --- arch/arm/mach-tegra/reset.c | 27 +++++++++++++++++---------- 1 file changed, 17 insertions(+), 10 deletions(-) diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c index 1ac434e..6964117 100644 --- a/arch/arm/mach-tegra/reset.c +++ b/arch/arm/mach-tegra/reset.c @@ -33,26 +33,18 @@ static bool is_enabled; -static void __init tegra_cpu_reset_handler_enable(void) +static void __init tegra_cpu_reset_handler_set(const u32 reset_address) { - void __iomem *iram_base = IO_ADDRESS(TEGRA_IRAM_RESET_BASE); void __iomem *evp_cpu_reset = IO_ADDRESS(TEGRA_EXCEPTION_VECTORS_BASE + 0x100); void __iomem *sb_ctrl = IO_ADDRESS(TEGRA_SB_BASE); u32 reg; - BUG_ON(is_enabled); - BUG_ON(tegra_cpu_reset_handler_size > TEGRA_IRAM_RESET_HANDLER_SIZE); - - memcpy(iram_base, (void *)__tegra_cpu_reset_handler_start, - tegra_cpu_reset_handler_size); - /* * NOTE: This must be the one and only write to the EVP CPU reset * vector in the entire system. */ - writel(TEGRA_IRAM_RESET_BASE + tegra_cpu_reset_handler_offset, - evp_cpu_reset); + writel(reset_address, evp_cpu_reset); wmb(); reg = readl(evp_cpu_reset); @@ -66,6 +58,21 @@ static void __init tegra_cpu_reset_handler_enable(void) writel(reg, sb_ctrl); wmb(); } +} + +static void __init tegra_cpu_reset_handler_enable(void) +{ + void __iomem *iram_base = IO_ADDRESS(TEGRA_IRAM_RESET_BASE); + const u32 reset_address = TEGRA_IRAM_RESET_BASE + + tegra_cpu_reset_handler_offset; + + BUG_ON(is_enabled); + BUG_ON(tegra_cpu_reset_handler_size > TEGRA_IRAM_RESET_HANDLER_SIZE); + + memcpy(iram_base, (void *)__tegra_cpu_reset_handler_start, + tegra_cpu_reset_handler_size); + + tegra_cpu_reset_handler_set(reset_address); is_enabled = true; }