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| author | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2007-10-10 14:58:29 +0200 |
|---|---|---|
| committer | Haavard Skinnemoen <hskinnemoen@atmel.com> | 2008-01-25 08:31:43 +0100 |
| commit | e7ba176b47db2ed53f258a6b4fe9d9fc6fa437a9 (patch) | |
| tree | beb9ffab7da0c24f11c04b6eb4ca29b23b1dd07b /arch/avr32/kernel/traps.c | |
| parent | f6135d12db4bed3b992052020f1c50d749cd8dc6 (diff) | |
| download | linux-e7ba176b47db2ed53f258a6b4fe9d9fc6fa437a9.tar.gz linux-e7ba176b47db2ed53f258a6b4fe9d9fc6fa437a9.tar.xz | |
[AVR32] NMI debugging
Change the NMI handler to use the die notifier chain to signal anyone
who cares. Add a simple "nmi debugger" which hooks into this chain and
that may dump registers, task state, etc. when it happens.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'arch/avr32/kernel/traps.c')
| -rw-r--r-- | arch/avr32/kernel/traps.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c index 870c075e6314..cf6f686d9b0b 100644 --- a/arch/avr32/kernel/traps.c +++ b/arch/avr32/kernel/traps.c @@ -9,6 +9,7 @@ #include <linux/bug.h> #include <linux/init.h> #include <linux/kallsyms.h> +#include <linux/kdebug.h> #include <linux/module.h> #include <linux/notifier.h> #include <linux/sched.h> @@ -107,9 +108,23 @@ void _exception(long signr, struct pt_regs *regs, int code, asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs) { - printk(KERN_ALERT "Got Non-Maskable Interrupt, dumping regs\n"); - show_regs_log_lvl(regs, KERN_ALERT); - show_stack_log_lvl(current, regs->sp, regs, KERN_ALERT); + int ret; + + nmi_enter(); + + ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT); + switch (ret) { + case NOTIFY_OK: + case NOTIFY_STOP: + return; + case NOTIFY_BAD: + die("Fatal Non-Maskable Interrupt", regs, SIGINT); + default: + break; + } + + printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n"); + nmi_disable(); } asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs) |