arch/avr32/kernel/irq.c

   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 /* May be overridden by platform code */
  20 int __weak nmi_enable(void)
  21 {
  22         return -ENOSYS;
  23 }
  24
  25 void __weak nmi_disable(void)
  26 {
  27
  28 }
  29
  30 #ifdef CONFIG_PROC_FS
  31 int show_interrupts(struct seq_file *p, void *v)
  32 {
  33         int i = *(loff_t *)v, cpu;
  34         struct irqaction *action;
  35         unsigned long flags;
  36
  37         if (i == 0) {
  38                 seq_puts(p, "           ");
  39                 for_each_online_cpu(cpu)
  40                         seq_printf(p, "CPU%d       ", cpu);
  41                 seq_putc(p, '\n');
  42         }
  43
  44         if (i < NR_IRQS) {
  45                 raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
  46                 action = irq_desc[i].action;
  47                 if (!action)
  48                         goto unlock;
  49
  50                 seq_printf(p, "%3d: ", i);
  51                 for_each_online_cpu(cpu)
  52                         seq_printf(p, "%10u ", kstat_irqs_cpu(i, cpu));
  53                 seq_printf(p, " %8s", irq_desc[i].chip->name ? : "-");
  54                 seq_printf(p, "  %s", action->name);
  55                 for (action = action->next; action; action = action->next)
  56                         seq_printf(p, ", %s", action->name);
  57
  58                 seq_putc(p, '\n');
  59         unlock:
  60                 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
  61         }
  62
  63         return 0;
  64 }
  65 #endif