/*
   *
   *	linux/arch/cris/kernel/irq.c
   *

   *      Copyright (c) 2000,2007 Axis Communications AB

   *
   *      Authors: Bjorn Wesen (bjornw@axis.com)
   *
   * This file contains the code used by various IRQ handling routines:

   * asking for different IRQs should be done through these routines

   * instead of just grabbing them. Thus setups with different IRQ numbers
   * shouldn't result in any weird surprises, and installing new handlers
   * should be easier.
   *

   */
  
  /*

   * IRQs are in fact implemented a bit like signal handlers for the kernel.

   * Naturally it's not a 1:1 relation, but there are similarities.
   */

  #include <linux/module.h>
  #include <linux/ptrace.h>

  #include <linux/irq.h>

  
  #include <linux/kernel_stat.h>
  #include <linux/signal.h>
  #include <linux/sched.h>
  #include <linux/ioport.h>
  #include <linux/interrupt.h>
  #include <linux/timex.h>

  #include <linux/random.h>
  #include <linux/init.h>
  #include <linux/seq_file.h>
  #include <linux/errno.h>

  #include <linux/spinlock.h>

  
  #include <asm/io.h>

  /* called by the assembler IRQ entry functions defined in irq.h

   * to dispatch the interrupts to registered handlers

   * interrupts are disabled upon entry - depending on if the

   * interrupt was registered with IRQF_DISABLED or not, interrupts

   * are re-enabled or not.
   */
  
  asmlinkage void do_IRQ(int irq, struct pt_regs * regs)
  {

  	unsigned long sp;

  	struct pt_regs *old_regs = set_irq_regs(regs);

  	irq_enter();
  	sp = rdsp();
  	if (unlikely((sp & (PAGE_SIZE - 1)) < (PAGE_SIZE/8))) {
  		printk("do_IRQ: stack overflow: %lX
  ", sp);
  		show_stack(NULL, (unsigned long *)sp);

  	}

  	generic_handle_irq(irq);
  	irq_exit();

  	set_irq_regs(old_regs);

  }

  void weird_irq(void)
  {
  	local_irq_disable();
  	printk("weird irq
  ");
  	while(1);
  }