source: svn/trunk/newcon3bcm2_21bu/toolchain/mips-linux-uclibc/include/asm/irq.h

/*
 * 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.
 *
 * Copyright (C) 1994 by Waldorf GMBH, written by Ralf Baechle
 * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
 */
#ifndef _ASM_IRQ_H
#define _ASM_IRQ_H

#include <linux/linkage.h>
#include <irq.h>

#ifdef CONFIG_I8259
static inline int irq_canonicalize(int irq)
{
        return ((irq == 2) ? 9 : irq);
}
#else
#define irq_canonicalize(irq) (irq)     /* Sane hardware, sane code ... */
#endif

struct pt_regs;

#ifdef CONFIG_PREEMPT

extern asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs);

#else

/*
 * do_IRQ handles all normal device IRQ's (the special
 * SMP cross-CPU interrupts have their own specific
 * handlers).
 *
 * Ideally there should be away to get this into kernel/irq/handle.c to
 * avoid the overhead of a call for just a tiny function ...
 */
#define do_IRQ(irq, regs)                                               \
do {                                                                    \
        irq_enter();                                                    \
        __do_IRQ((irq), (regs));                                        \
        irq_exit();                                                     \
} while (0)

#endif

extern void arch_init_irq(void);

struct irqaction;
int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);

#endif /* _ASM_IRQ_H */