Logo Search packages:      
Sourcecode: linux version File versions

irq.c

/*
 * linux/arch/m32r/kernel/irq.c
 *
 *  Copyright (c) 2003, 2004  Hitoshi Yamamoto
 *  Copyright (c) 2004  Hirokazu Takata <takata at linux-m32r.org>
 */

/*
 *    linux/arch/i386/kernel/irq.c
 *
 *    Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
 *
 * This file contains the lowest level m32r-specific interrupt
 * entry and irq statistics code. All the remaining irq logic is
 * done by the generic kernel/irq/ code and in the
 * m32r-specific irq controller code.
 */

#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <linux/seq_file.h>
#include <linux/module.h>
#include <asm/uaccess.h>

/*
 * Generic, controller-independent functions:
 */

int show_interrupts(struct seq_file *p, void *v)
{
      int i = *(loff_t *) v, j;
      struct irqaction * action;
      unsigned long flags;

      if (i == 0) {
            seq_printf(p, "           ");
            for_each_online_cpu(j)
                  seq_printf(p, "CPU%d       ",j);
            seq_putc(p, '\n');
      }

      if (i < NR_IRQS) {
            spin_lock_irqsave(&irq_desc[i].lock, flags);
            action = irq_desc[i].action;
            if (!action)
                  goto skip;
            seq_printf(p, "%3d: ",i);
#ifndef CONFIG_SMP
            seq_printf(p, "%10u ", kstat_irqs(i));
#else
            for_each_online_cpu(j)
                  seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
            seq_printf(p, " %14s", irq_desc[i].chip->typename);
            seq_printf(p, "  %s", action->name);

            for (action=action->next; action; action = action->next)
                  seq_printf(p, ", %s", action->name);

            seq_putc(p, '\n');
skip:
            spin_unlock_irqrestore(&irq_desc[i].lock, flags);
      }
      return 0;
}

/*
 * do_IRQ handles all normal device IRQs (the special
 * SMP cross-CPU interrupts have their own specific
 * handlers).
 */
asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
{
      struct pt_regs *old_regs;
      old_regs = set_irq_regs(regs);
      irq_enter();

#ifdef CONFIG_DEBUG_STACKOVERFLOW
      /* FIXME M32R */
#endif
      __do_IRQ(irq);
      irq_exit();
      set_irq_regs(old_regs);

      return 1;
}

Generated by  Doxygen 1.6.0   Back to index