From patchwork Tue Oct 16 00:39:56 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anton Vorontsov X-Patchwork-Id: 1598021 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 711DCDFB34 for ; Tue, 16 Oct 2012 00:45:49 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TNvGP-0005Ci-H3; Tue, 16 Oct 2012 00:44:05 +0000 Received: from mail-pa0-f49.google.com ([209.85.220.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TNvG3-00053C-AU for linux-arm-kernel@lists.infradead.org; Tue, 16 Oct 2012 00:43:44 +0000 Received: by mail-pa0-f49.google.com with SMTP id bi5so5606260pad.36 for ; Mon, 15 Oct 2012 17:43:43 -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=IKQ555fyk7XqiD4q7y+/FFWNfTFuDtD7cwaLgQo4hCA=; b=FF38kiydk0y+cjcaAeK5uiOggNTxasOGkHCjnXzsYMMF8v55n/OpgdOsFV8lfN1GO0 xPl9amNzcpgRLhzeqNPgPmeSrEvjHQEJIbg17hRZSRBKVJ7wUA8GatcvMioKByXlGW6v sLypZYSDuvGn085vEBcP7aTXsSzqxJva/0F/e8qVQoxSeyY2qktw50zbCC11FqTcc6ZT RLdmCwzOEAEp6xqSTI4AEN6o59wqagcX1YaIb6HF2X4ud9wI/+25KBuBLZkA7iSBTJ5J QQi+fm4OpNEdvxxGACQ5yaZLNyX7YpQSdQLkgvOfo2VQ6mtxHawEDEUn1IhMaRrwleCW Ei6g== Received: by 10.68.204.137 with SMTP id ky9mr41737530pbc.90.1350348223049; Mon, 15 Oct 2012 17:43:43 -0700 (PDT) Received: from localhost (ip-64-134-230-8.public.wayport.net. [64.134.230.8]) by mx.google.com with ESMTPS id nt7sm9820176pbb.33.2012.10.15.17.43.41 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 15 Oct 2012 17:43:42 -0700 (PDT) From: Anton Vorontsov To: Russell King Subject: [PATCH 4/4] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger Date: Mon, 15 Oct 2012 17:39:56 -0700 Message-Id: <1350347996-25412-4-git-send-email-anton.vorontsov@linaro.org> X-Mailer: git-send-email 1.7.12.3 In-Reply-To: <20121016003756.GA23146@lizard> References: <20121016003756.GA23146@lizard> X-Gm-Message-State: ALoCoQnnQOLQp9Gna7ewwN3Hdz8YkLI/P/Np14a/ItsFsnBYwXu9LyqjM7HqutbfJp/DyBn4mGm6 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 [209.85.220.49 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 , 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 87eb4f8..879136b 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -337,6 +337,7 @@ config ARCH_VERSATILE select PLAT_VERSATILE_CLCD select PLAT_VERSATILE_CLOCK select PLAT_VERSATILE_FPGA_IRQ + select ARCH_MIGHT_HAVE_KGDB_FIQ help This enables support for ARM Ltd Versatile board. 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);