2 * Copyright (C) 2007 Atmel Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 #include <linux/delay.h>
9 #include <linux/kdebug.h>
10 #include <linux/notifier.h>
11 #include <linux/sched.h>
12 #include <linux/sched/debug.h>
17 NMI_SHOW_STATE
= 1 << 0,
18 NMI_SHOW_REGS
= 1 << 1,
20 NMI_DEBOUNCE
= 1 << 3,
23 static unsigned long nmi_actions
;
25 static int nmi_debug_notify(struct notifier_block
*self
,
26 unsigned long val
, void *data
)
28 struct die_args
*args
= data
;
30 if (likely(val
!= DIE_NMI
))
33 if (nmi_actions
& NMI_SHOW_STATE
)
35 if (nmi_actions
& NMI_SHOW_REGS
)
36 show_regs(args
->regs
);
37 if (nmi_actions
& NMI_DEBOUNCE
)
39 if (nmi_actions
& NMI_DIE
)
45 static struct notifier_block nmi_debug_nb
= {
46 .notifier_call
= nmi_debug_notify
,
49 static int __init
nmi_debug_setup(char *str
)
53 register_die_notifier(&nmi_debug_nb
);
55 printk(KERN_WARNING
"Unable to enable NMI.\n");
62 for (p
= str
+ 1; *p
; p
= sep
+ 1) {
66 if (strcmp(p
, "state") == 0)
67 nmi_actions
|= NMI_SHOW_STATE
;
68 else if (strcmp(p
, "regs") == 0)
69 nmi_actions
|= NMI_SHOW_REGS
;
70 else if (strcmp(p
, "debounce") == 0)
71 nmi_actions
|= NMI_DEBOUNCE
;
72 else if (strcmp(p
, "die") == 0)
73 nmi_actions
|= NMI_DIE
;
75 printk(KERN_WARNING
"NMI: Unrecognized action `%s'\n",
83 __setup("nmi_debug", nmi_debug_setup
);