@@ -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
@@ -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
@@ -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)
new file mode 100644
@@ -0,0 +1,31 @@
+/*
+ * KGDB FIQ board support
+ *
+ * Copyright 2012 Linaro Ltd.
+ * Anton Vorontsov <anton.vorontsov@linaro.org>
+ *
+ * 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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include <asm/hardware/vic.h>
+
+static int kgdb_fiq;
+module_param_named(uart_num, kgdb_fiq, int, 0600);
+MODULE_PARM_DESC(uart_num, "UART<number> 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);
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 <anton.vorontsov@linaro.org> --- 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