arch/m32r/kernel/irq.c

   1 /*
   2  * linux/arch/m32r/kernel/irq.c
   3  *
   4  *  Copyright (c) 2003, 2004  Hitoshi Yamamoto
   5  *  Copyright (c) 2004  Hirokazu Takata <takata at linux-m32r.org>
   6  */
   7
   8 /*
   9  *      linux/arch/i386/kernel/irq.c
  10  *
  11  *      Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
  12  *
  13  * This file contains the lowest level m32r-specific interrupt
  14  * entry and irq statistics code. All the remaining irq logic is
  15  * done by the generic kernel/irq/ code and in the
  16  * m32r-specific irq controller code.
  17  */
  18
  19 #include <linux/kernel_stat.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/module.h>
  22 #include <asm/uaccess.h>
  23
  24 /*
  25  * do_IRQ handles all normal device IRQs (the special
  26  * SMP cross-CPU interrupts have their own specific
  27  * handlers).
  28  */
  29 asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
  30 {
  31         struct pt_regs *old_regs;
  32         old_regs = set_irq_regs(regs);
  33         irq_enter();
  34
  35 #ifdef CONFIG_DEBUG_STACKOVERFLOW
  36         /* FIXME M32R */
  37 #endif
  38         generic_handle_irq(irq);
  39         irq_exit();
  40         set_irq_regs(old_regs);
  41
  42         return 1;
  43 }