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/* $Id: hardirq.h,v 1.4 1998/09/19 19:19:37 ralf Exp $
*
* 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) 1997, 1998, 1999 by Ralf Baechle
* Copyright (C) 1999 Silicon Graphics, Inc.
*/
#ifndef _ASM_HARDIRQ_H
#define _ASM_HARDIRQ_H
#include <linux/threads.h>
extern unsigned int local_irq_count[NR_CPUS];
/*
* Are we in an interrupt context? Either doing bottom half
* or hardware interrupt processing?
*/
#define in_interrupt() ({ int __cpu = smp_processor_id(); \
(local_irq_count[__cpu] + local_bh_count[__cpu] != 0); })
#ifndef __SMP__
#define hardirq_trylock(cpu) (local_irq_count[cpu] == 0)
#define hardirq_endlock(cpu) do { } while (0)
#define hardirq_enter(cpu) (local_irq_count[cpu]++)
#define hardirq_exit(cpu) (local_irq_count[cpu]--)
#define synchronize_irq() barrier();
#else
#error No habla MIPS SMP
#endif /* __SMP__ */
#endif /* _ASM_HARDIRQ_H */
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