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irq.c

/*
 * irq.c
 *
 * (C) Copyright 2007, Greg Ungerer <gerg@snapgear.com>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/types.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <asm/system.h>
#include <asm/traps.h>

asmlinkage void do_IRQ(int irq, struct pt_regs *regs)
{
      struct pt_regs *oldregs = set_irq_regs(regs);

      irq_enter();
      __do_IRQ(irq);
      irq_exit();

      set_irq_regs(oldregs);
}

void ack_bad_irq(unsigned int irq)
{
      printk(KERN_ERR "IRQ: unexpected irq=%d\n", irq);
}

static struct irq_chip m_irq_chip = {
      .name       = "M68K-INTC",
      .enable           = enable_vector,
      .disable    = disable_vector,
      .ack        = ack_vector,
};

void __init init_IRQ(void)
{
      int irq;

      init_vectors();

      for (irq = 0; (irq < NR_IRQS); irq++) {
            irq_desc[irq].status = IRQ_DISABLED;
            irq_desc[irq].action = NULL;
            irq_desc[irq].depth = 1;
            irq_desc[irq].chip = &m_irq_chip;
      }
}

int show_interrupts(struct seq_file *p, void *v)
{
      struct irqaction *ap;
      int irq = *((loff_t *) v);

      if (irq == 0)
            seq_puts(p, "           CPU0\n");

      if (irq < NR_IRQS) {
            ap = irq_desc[irq].action;
            if (ap) {
                  seq_printf(p, "%3d: ", irq);
                  seq_printf(p, "%10u ", kstat_irqs(irq));
                  seq_printf(p, "%14s  ", irq_desc[irq].chip->name);

                  seq_printf(p, "%s", ap->name);
                  for (ap = ap->next; ap; ap = ap->next)
                        seq_printf(p, ", %s", ap->name);
                  seq_putc(p, '\n');
            }
      }

      return 0;
}


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