From patchwork Mon Aug 20 14:47:30 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 1349671 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 51CC6DFF0F for ; Mon, 20 Aug 2012 15:03:49 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T3TMZ-00049C-6u; Mon, 20 Aug 2012 14:53:56 +0000 Received: from mail-pb0-f49.google.com ([209.85.160.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T3TJ9-00029E-40 for linux-arm-kernel@lists.infradead.org; Mon, 20 Aug 2012 14:50:24 +0000 Received: by mail-pb0-f49.google.com with SMTP id rq8so7544527pbb.36 for ; Mon, 20 Aug 2012 07:50:22 -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=ClYCLsUB2sKv84quVkxxDyzeXSog4gmPNyQ/CQGK/HI=; b=Wekfhu3d/oJhbQN5NcXsZe6TEYEwpRt2QK6wLHkVgxGLNX0H3Ozhf28WI+Ln60kuza /4f8jkB9eHAcJpGNqzeaTAz6FL+g/Q3JYGiHBurYy6s+L4rWmMh9awC4/sIH2tmb5L/g mrPzU1l4F9Ykovf0lpnVXRAf3dAHFDYjR4pqPpzF1ZjAXr30fpbfo7o/rp8Mfk8iQtfK OKZYVBmcpqQnUnWKQeDsDKqhhxKaEwsbvceU2LH0y4R3nOhVp2CE9UErRGf3WRQrtirF 7GFO1KMpePyL6JcPcBuWk3obHEwePfCZNT8Xxu+brRJxmOoSaUs+xlPRD6ejpw794vzo Lpbw== Received: by 10.68.130.67 with SMTP id oc3mr35071772pbb.18.1345474222858; Mon, 20 Aug 2012 07:50:22 -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 pj10sm11232958pbb.46.2012.08.20.07.50.21 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 20 Aug 2012 07:50:22 -0700 (PDT) From: Anton Vorontsov To: Russell King , Jason Wessel , Greg Kroah-Hartman , Alan Cox Subject: [PATCH 12/12] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Date: Mon, 20 Aug 2012 07:47:30 -0700 Message-Id: <1345474050-8339-12-git-send-email-anton.vorontsov@linaro.org> X-Mailer: git-send-email 1.7.11.5 In-Reply-To: <20120820144449.GA32560@lizard> References: <20120820144449.GA32560@lizard> X-Gm-Message-State: ALoCoQn05jiiqwg5UOlndq4XrBshEZ00gjLMwYB7Z4GCAxYLYRnE4n8yai1BOdAXkLC0PGkRXxVK 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 [209.85.160.49 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, kgdb-bugreport@lists.sourceforge.net, linux-kernel@vger.kernel.org, =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , John Stultz , Colin Cross , 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 If enabled, kernel will able to enter KGDB upon serial line activity on UART ports. Note that even with this patch and CONFIG_KGDB_FIQ is enabled, you still need to pass kgdb_fiq.enable=1 kernel command line option, otherwise UART will behave in a normal way. By default UART0 is used, but this can be changed via kgdb_fiq.uart_num kernel command line option. Signed-off-by: Anton Vorontsov --- arch/arm/Kconfig | 1 + arch/arm/mach-versatile/Makefile | 1 + arch/arm/mach-versatile/kgdb_fiq.c | 31 +++++++++++++++++++++++++++++++ 3 files changed, 33 insertions(+) create mode 100644 arch/arm/mach-versatile/kgdb_fiq.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index c978c74..689b716 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -330,6 +330,7 @@ config ARCH_VERSATILE select ICST select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_MIGHT_HAVE_KGDB_FIQ select NEED_MACH_IO_H if PCI select PLAT_VERSATILE select PLAT_VERSATILE_CLOCK diff --git a/arch/arm/mach-versatile/Makefile b/arch/arm/mach-versatile/Makefile index 81fa3fe..bfd761f 100644 --- a/arch/arm/mach-versatile/Makefile +++ b/arch/arm/mach-versatile/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_ARCH_VERSATILE_PB) += versatile_pb.o obj-$(CONFIG_MACH_VERSATILE_AB) += versatile_ab.o obj-$(CONFIG_MACH_VERSATILE_DT) += versatile_dt.o obj-$(CONFIG_PCI) += pci.o +obj-$(CONFIG_KGDB_FIQ) += kgdb_fiq.o diff --git a/arch/arm/mach-versatile/kgdb_fiq.c b/arch/arm/mach-versatile/kgdb_fiq.c new file mode 100644 index 0000000..3cdf71d --- /dev/null +++ b/arch/arm/mach-versatile/kgdb_fiq.c @@ -0,0 +1,31 @@ +/* + * KGDB FIQ board support + * + * Copyright 2012 Linaro Ltd. + * Anton Vorontsov + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include + +static int kgdb_fiq; +module_param_named(uart_num, kgdb_fiq, int, 0600); +MODULE_PARM_DESC(uart_num, "UART port to use for KGDB FIQ"); + +static int __init kgdb_fiq_init(void) +{ + WARN_ON(kgdb_fiq > INT_UARTINT2 - INT_UARTINT0); + + return kgdb_register_fiq(INT_UARTINT0 + kgdb_fiq, + vic_fiq_select, + vic_is_fiq_rised); +} +console_initcall(kgdb_fiq_init);