From mboxrd@z Thu Jan 1 00:00:00 1970 From: anton.vorontsov@linaro.org (Anton Vorontsov) Date: Mon, 30 Jul 2012 04:58:19 -0700 Subject: [PATCH 10/11] ARM: versatile: Make able to use UART ports for KGDB FIQ debugger In-Reply-To: <20120730115719.GA5742@lizard> References: <20120730115719.GA5742@lizard> Message-ID: <1343649500-18491-10-git-send-email-anton.vorontsov@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.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/include/mach/irqs.h | 1 + arch/arm/mach-versatile/kgdb_fiq.c | 31 +++++++++++++++++++++++++++ 4 files changed, 34 insertions(+) create mode 100644 arch/arm/mach-versatile/kgdb_fiq.c diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index ae6ddf1..c0df1ba 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -311,6 +311,7 @@ config ARCH_VERSATILE select ICST select GENERIC_CLOCKEVENTS select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_MIGHT_HAVE_FIQ select NEED_MACH_IO_H if PCI select PLAT_VERSATILE select PLAT_VERSATILE_CLCD 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/include/mach/irqs.h b/arch/arm/mach-versatile/include/mach/irqs.h index bf44c61..fcd2a95 100644 --- a/arch/arm/mach-versatile/include/mach/irqs.h +++ b/arch/arm/mach-versatile/include/mach/irqs.h @@ -26,6 +26,7 @@ * held within platform.h */ #define IRQ_VIC_START 0 +#define FIQ_START IRQ_VIC_START #define IRQ_WDOGINT (IRQ_VIC_START + INT_WDOGINT) #define IRQ_SOFTINT (IRQ_VIC_START + INT_SOFTINT) #define IRQ_COMMRx (IRQ_VIC_START + INT_COMMRx) 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); -- 1.7.10.4