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: 10815 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 68C3723E56 for ; Mon, 20 Aug 2012 14:50:24 +0000 (UTC) Received: from mail-iy0-f180.google.com (mail-iy0-f180.google.com [209.85.210.180]) by fiordland.canonical.com (Postfix) with ESMTP id 43A9EA18B62 for ; Mon, 20 Aug 2012 14:50:18 +0000 (UTC) Received: by mail-iy0-f180.google.com with SMTP id j38so2715925iad.11 for ; Mon, 20 Aug 2012 07:50:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=ClYCLsUB2sKv84quVkxxDyzeXSog4gmPNyQ/CQGK/HI=; b=EXpctBVjy1X+CO1Nr6PynpC35RqAzQF+eccuwwpH5nUTInbto/Be1PXqgt2JfldiyO 2fa+ZOsf5m/zn+Sdhl49/yxcPCUo07QyNoLb91bjdIclMNAogz0Yx/OGZVQ83cnlmeqm okUzsesa95ia8yBGEWtKviR4uYovBAUwu1X5DESw6OXtqzcy7CclacgEs8ld1OKXN/Ez 35aKtPek0Aa8aSd9YssZ9HgWvjkLvM/AdNldOW2auVBek4n8mJSKR2WhOAbpY7BOF18l pTPex1Ja6hykddZIw00noesPv/Un3NpqkpZHOCMyYi/K/NUTm+dd0Wxx8/1HIEN/qivJ s2CQ== Received: by 10.42.60.139 with SMTP id q11mr11103971ich.53.1345474223809; Mon, 20 Aug 2012 07:50:23 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.50.184.232 with SMTP id ex8csp87744igc; Mon, 20 Aug 2012 07:50:23 -0700 (PDT) Received: by 10.66.81.66 with SMTP id y2mr30034217pax.62.1345474223087; Mon, 20 Aug 2012 07:50:23 -0700 (PDT) Received: from mail-pz0-f50.google.com (mail-pz0-f50.google.com [209.85.210.50]) by mx.google.com with ESMTPS id qt3si26954278pbc.353.2012.08.20.07.50.22 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 20 Aug 2012 07:50:23 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.210.50 is neither permitted nor denied by best guess record for domain of anton.vorontsov@linaro.org) client-ip=209.85.210.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.210.50 is neither permitted nor denied by best guess record for domain of anton.vorontsov@linaro.org) smtp.mail=anton.vorontsov@linaro.org Received: by mail-pz0-f50.google.com with SMTP id e7so2499989dad.37 for ; Mon, 20 Aug 2012 07:50:22 -0700 (PDT) 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 Cc: =?UTF-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= , Colin Cross , John Stultz , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com, kgdb-bugreport@lists.sourceforge.net 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: ALoCoQnlJOIuiHsI1CNUs+MNE1Z03txIupny+A3byaIG6iChIhtY5pK/Z7tNHqpTMNckaDCaNvKX 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);