// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2007 Atmel Corporation */#include <linux/delay.h>#include <linux/kdebug.h>#include <linux/notifier.h>#include <linux/sched.h>#include <linux/sched/debug.h>#include <linux/hardirq.h> enum nmi_action {	NMI_SHOW_STATE	= 1 << 0,	NMI_SHOW_REGS	= 1 << 1,	NMI_DIE		= 1 << 2,	NMI_DEBOUNCE	= 1 << 3,}; static unsigned long nmi_actions; static int nmi_debug_notify(struct notifier_block *self,		unsigned long val, void *data){	struct die_args *args = data; 	if (likely(val != DIE_NMI))		return NOTIFY_DONE; 	if (nmi_actions & NMI_SHOW_STATE)		show_state();	if (nmi_actions & NMI_SHOW_REGS)		show_regs(args->regs);	if (nmi_actions & NMI_DEBOUNCE)		mdelay(10);	if (nmi_actions & NMI_DIE)		return NOTIFY_BAD; 	return NOTIFY_OK;} static struct notifier_block nmi_debug_nb = {	.notifier_call = nmi_debug_notify,}; static int __init nmi_debug_setup(char *str){	char *p, *sep; 	register_die_notifier(&nmi_debug_nb); 	if (*str != '=')		return 1; 	for (p = str + 1; *p; p = sep + 1) {		sep = strchr(p, ',');		if (sep)			*sep = 0;		if (strcmp(p, "state") == 0)			nmi_actions |= NMI_SHOW_STATE;		else if (strcmp(p, "regs") == 0)			nmi_actions |= NMI_SHOW_REGS;		else if (strcmp(p, "debounce") == 0)			nmi_actions |= NMI_DEBOUNCE;		else if (strcmp(p, "die") == 0)			nmi_actions |= NMI_DIE;		else			printk(KERN_WARNING "NMI: Unrecognized action `%s'\n",				p);		if (!sep)			break;	} 	return 1;}__setup("nmi_debug", nmi_debug_setup);