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 /*
  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  */
  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 */
  29 int __weak nmi_enable(void)
  30 {
  31         return -ENOSYS;
  32 }
  33
  34 void __weak nmi_disable(void)
  35 {
  36
  37 }
  38
  39 #ifdef CONFIG_PROC_FS
  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