1 /*
2 * Copyright (C) 2004-2006 Atmel Corporation
3 *
4 * Based on arch/i386/kernel/irq.c
5 * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12 #include <linux/interrupt.h>
13 #include <linux/irq.h>
14 #include <linux/kernel_stat.h>
15 #include <linux/proc_fs.h>
16 #include <linux/seq_file.h>
17 #include <linux/sysdev.h>
18
19 /*
20 * 'what should we do if we get a hw irq event on an illegal vector'.
21 * each architecture has to answer this themselves.
22 */
ack_bad_irq(unsigned int irq)23 void ack_bad_irq(unsigned int irq)
24 {
25 printk("unexpected IRQ %u\n", irq);
26 }
27
28 /* May be overridden by platform code */
nmi_enable(void)29 int __weak nmi_enable(void)
30 {
31 return -ENOSYS;
32 }
33
nmi_disable(void)34 void __weak nmi_disable(void)
35 {
36
37 }
38
39 #ifdef CONFIG_PROC_FS
show_interrupts(struct seq_file * p,void * v)40 int show_interrupts(struct seq_file *p, void *v)
41 {
42 int i = *(loff_t *)v, cpu;
43 struct irqaction *action;
44 unsigned long flags;
45
46 if (i == 0) {
47 seq_puts(p, " ");
48 for_each_online_cpu(cpu)
49 seq_printf(p, "CPU%d ", cpu);
50 seq_putc(p, '\n');
51 }
52
53 if (i < NR_IRQS) {
54 spin_lock_irqsave(&irq_desc[i].lock, flags);
55 action = irq_desc[i].action;
56 if (!action)
57 goto unlock;
58
59 seq_printf(p, "%3d: ", i);
60 for_each_online_cpu(cpu)
61 seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[i]);
62 seq_printf(p, " %8s", irq_desc[i].chip->name ? : "-");
63 seq_printf(p, " %s", action->name);
64 for (action = action->next; action; action = action->next)
65 seq_printf(p, ", %s", action->name);
66
67 seq_putc(p, '\n');
68 unlock:
69 spin_unlock_irqrestore(&irq_desc[i].lock, flags);
70 }
71
72 return 0;
73 }
74 #endif
75