1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2007 Atmel Corporation
 4 */
 5#include <linux/delay.h>
 6#include <linux/kdebug.h>
 7#include <linux/notifier.h>
 8#include <linux/sched.h>
 9#include <linux/sched/debug.h>
10#include <linux/hardirq.h>
11
12enum nmi_action {
13	NMI_SHOW_STATE	= 1 << 0,
14	NMI_SHOW_REGS	= 1 << 1,
15	NMI_DIE		= 1 << 2,
16	NMI_DEBOUNCE	= 1 << 3,
17};
18
19static unsigned long nmi_actions;
20
21static int nmi_debug_notify(struct notifier_block *self,
22		unsigned long val, void *data)
23{
24	struct die_args *args = data;
25
26	if (likely(val != DIE_NMI))
27		return NOTIFY_DONE;
28
29	if (nmi_actions & NMI_SHOW_STATE)
30		show_state();
31	if (nmi_actions & NMI_SHOW_REGS)
32		show_regs(args->regs);
33	if (nmi_actions & NMI_DEBOUNCE)
34		mdelay(10);
35	if (nmi_actions & NMI_DIE)
36		return NOTIFY_BAD;
37
38	return NOTIFY_OK;
39}
40
41static struct notifier_block nmi_debug_nb = {
42	.notifier_call = nmi_debug_notify,
43};
44
45static int __init nmi_debug_setup(char *str)
46{
47	char *p, *sep;
48
49	register_die_notifier(&nmi_debug_nb);
50
51	if (*str != '=')
52		return 0;
53
54	for (p = str + 1; *p; p = sep + 1) {
55		sep = strchr(p, ',');
56		if (sep)
57			*sep = 0;
58		if (strcmp(p, "state") == 0)
59			nmi_actions |= NMI_SHOW_STATE;
60		else if (strcmp(p, "regs") == 0)
61			nmi_actions |= NMI_SHOW_REGS;
62		else if (strcmp(p, "debounce") == 0)
63			nmi_actions |= NMI_DEBOUNCE;
64		else if (strcmp(p, "die") == 0)
65			nmi_actions |= NMI_DIE;
66		else
67			printk(KERN_WARNING "NMI: Unrecognized action `%s'\n",
68				p);
69		if (!sep)
70			break;
71	}
72
73	return 0;
74}
75__setup("nmi_debug", nmi_debug_setup);

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2007 Atmel Corporation
 4 */
 5#include <linux/delay.h>
 6#include <linux/kdebug.h>
 7#include <linux/notifier.h>
 8#include <linux/sched.h>
 9#include <linux/sched/debug.h>
10#include <linux/hardirq.h>
11
12enum nmi_action {
13	NMI_SHOW_STATE	= 1 << 0,
14	NMI_SHOW_REGS	= 1 << 1,
15	NMI_DIE		= 1 << 2,
16	NMI_DEBOUNCE	= 1 << 3,
17};
18
19static unsigned long nmi_actions;
20
21static int nmi_debug_notify(struct notifier_block *self,
22		unsigned long val, void *data)
23{
24	struct die_args *args = data;
25
26	if (likely(val != DIE_NMI))
27		return NOTIFY_DONE;
28
29	if (nmi_actions & NMI_SHOW_STATE)
30		show_state();
31	if (nmi_actions & NMI_SHOW_REGS)
32		show_regs(args->regs);
33	if (nmi_actions & NMI_DEBOUNCE)
34		mdelay(10);
35	if (nmi_actions & NMI_DIE)
36		return NOTIFY_BAD;
37
38	return NOTIFY_OK;
39}
40
41static struct notifier_block nmi_debug_nb = {
42	.notifier_call = nmi_debug_notify,
43};
44
45static int __init nmi_debug_setup(char *str)
46{
47	char *p, *sep;
48
49	register_die_notifier(&nmi_debug_nb);
50
51	if (*str != '=')
52		return 1;
53
54	for (p = str + 1; *p; p = sep + 1) {
55		sep = strchr(p, ',');
56		if (sep)
57			*sep = 0;
58		if (strcmp(p, "state") == 0)
59			nmi_actions |= NMI_SHOW_STATE;
60		else if (strcmp(p, "regs") == 0)
61			nmi_actions |= NMI_SHOW_REGS;
62		else if (strcmp(p, "debounce") == 0)
63			nmi_actions |= NMI_DEBOUNCE;
64		else if (strcmp(p, "die") == 0)
65			nmi_actions |= NMI_DIE;
66		else
67			printk(KERN_WARNING "NMI: Unrecognized action `%s'\n",
68				p);
69		if (!sep)
70			break;
71	}
72
73	return 1;
74}
75__setup("nmi_debug", nmi_debug_setup);