78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2007 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/delay.h>
|
|
#include <linux/kdebug.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/sched.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 0;
|
|
|
|
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 0;
|
|
}
|
|
__setup("nmi_debug", nmi_debug_setup);
|