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/*
 2 * Copyright (C) 2007 Atmel Corporation
 3 *
 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.
 7 */
 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>
13#include <linux/hardirq.h>
14
15enum nmi_action {
16	NMI_SHOW_STATE	= 1 << 0,
17	NMI_SHOW_REGS	= 1 << 1,
18	NMI_DIE		= 1 << 2,
19	NMI_DEBOUNCE	= 1 << 3,
20};
21
22static unsigned long nmi_actions;
23
24static int nmi_debug_notify(struct notifier_block *self,
25		unsigned long val, void *data)
26{
27	struct die_args *args = data;
28
29	if (likely(val != DIE_NMI))
30		return NOTIFY_DONE;
31
32	if (nmi_actions & NMI_SHOW_STATE)
33		show_state();
34	if (nmi_actions & NMI_SHOW_REGS)
35		show_regs(args->regs);
36	if (nmi_actions & NMI_DEBOUNCE)
37		mdelay(10);
38	if (nmi_actions & NMI_DIE)
39		return NOTIFY_BAD;
40
41	return NOTIFY_OK;
42}
43
44static struct notifier_block nmi_debug_nb = {
45	.notifier_call = nmi_debug_notify,
46};
47
48static int __init nmi_debug_setup(char *str)
49{
50	char *p, *sep;
51
52	register_die_notifier(&nmi_debug_nb);
53
54	if (*str != '=')
55		return 0;
56
57	for (p = str + 1; *p; p = sep + 1) {
58		sep = strchr(p, ',');
59		if (sep)
60			*sep = 0;
61		if (strcmp(p, "state") == 0)
62			nmi_actions |= NMI_SHOW_STATE;
63		else if (strcmp(p, "regs") == 0)
64			nmi_actions |= NMI_SHOW_REGS;
65		else if (strcmp(p, "debounce") == 0)
66			nmi_actions |= NMI_DEBOUNCE;
67		else if (strcmp(p, "die") == 0)
68			nmi_actions |= NMI_DIE;
69		else
70			printk(KERN_WARNING "NMI: Unrecognized action `%s'\n",
71				p);
72		if (!sep)
73			break;
74	}
75
76	return 0;
77}
78__setup("nmi_debug", nmi_debug_setup);