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#ifndef __ASM_HARDIRQ_H

#define __ASM_HARDIRQ_H

#include <linux/config.h>

#include <linux/threads.h>

#include <linux/irq.h>

/* assembly code in softirq.h is sensitive to the offsets of these fields */

typedef struct {

        unsigned int __softirq_pending;

        unsigned int __local_irq_count;

        unsigned int __local_bh_count;

        unsigned int __syscall_count;

        struct task_struct * __ksoftirqd_task; /* waitqueue is too large */

        unsigned int __nmi_count;       /* arch dependent */

} ____cacheline_aligned irq_cpustat_t;

#include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */

/*

 * 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); })

#define in_irq() (local_irq_count(smp_processor_id()) != 0)

#ifndef CONFIG_SMP

#define hardirq_trylock(cpu)    (local_irq_count(cpu) == 0)

#define hardirq_endlock(cpu)    do { } while (0)

#define irq_enter(cpu, irq)     (local_irq_count(cpu)++)

#define irq_exit(cpu, irq)      (local_irq_count(cpu)--)

#define synchronize_irq()       barrier()

#else

#include <asm/atomic.h>

#include <asm/smp.h>

extern unsigned char global_irq_holder;

extern unsigned volatile long global_irq_lock; /* long for set_bit -RR */

static inline int irqs_running (void)

{

        int i;

        for (i = 0; i < smp_num_cpus; i++)

                if (local_irq_count(i))

                        return 1;

        return 0;

}

static inline void release_irqlock(int cpu)

{

        /* if we didn't own the irq lock, just ignore.. */

        if (global_irq_holder == (unsigned char) cpu) {

                global_irq_holder = NO_PROC_ID;

                clear_bit(0,&global_irq_lock);

        }

}

static inline void irq_enter(int cpu, int irq)

{

        ++local_irq_count(cpu);

        smp_mb();

        while (test_bit(0,&global_irq_lock)) {

                cpu_relax();

        }

}

static inline void irq_exit(int cpu, int irq)

{

        --local_irq_count(cpu);

}

static inline int hardirq_trylock(int cpu)

{

        return !local_irq_count(cpu) && !test_bit(0,&global_irq_lock);

}

#define hardirq_endlock(cpu)    do { } while (0)

extern void synchronize_irq(void);

#endif /* CONFIG_SMP */

#endif /* __ASM_HARDIRQ_H */