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#ifndef _ASM_IA64_HARDIRQ_H
#define _ASM_IA64_HARDIRQ_H
/*
* Copyright (C) 1998-2001 Hewlett-Packard Co
* Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
*/
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/irq.h>
#include <asm/processor.h>
/*
* No irq_cpustat_t for IA-64. The data is held in the per-CPU data structure.
*/
#define softirq_pending(cpu) (cpu_data(cpu)->softirq_pending)
#define ksoftirqd_task(cpu) (cpu_data(cpu)->ksoftirqd)
#define irq_count(cpu) (cpu_data(cpu)->irq_stat.f.irq_count)
#define bh_count(cpu) (cpu_data(cpu)->irq_stat.f.bh_count)
#define syscall_count(cpu) /* unused on IA-64 */
#define nmi_count(cpu) 0
#define local_softirq_pending() (local_cpu_data->softirq_pending)
#define local_ksoftirqd_task() (local_cpu_data->ksoftirqd)
#define local_irq_count() (local_cpu_data->irq_stat.f.irq_count)
#define local_bh_count() (local_cpu_data->irq_stat.f.bh_count)
#define local_syscall_count() /* unused on IA-64 */
#define local_nmi_count() 0
/*
* Are we in an interrupt context? Either doing bottom half or hardware interrupt
* processing?
*/
#define in_interrupt() (local_cpu_data->irq_stat.irq_and_bh_counts != 0)
#define in_irq() (local_cpu_data->irq_stat.f.irq_count != 0)
#ifndef CONFIG_SMP
# define local_hardirq_trylock() (local_irq_count() == 0)
# define local_hardirq_endlock() do { } while (0)
# define local_irq_enter(irq) (local_irq_count()++)
# define local_irq_exit(irq) (local_irq_count()--)
# define synchronize_irq() barrier()
#else
#include <asm/atomic.h>
#include <asm/smp.h>
extern unsigned int global_irq_holder;
extern volatile unsigned long global_irq_lock;
static inline int
irqs_running (void)
{
int i;
for (i = 0; i < smp_num_cpus; i++)
if (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 == cpu) {
global_irq_holder = NO_PROC_ID;
clear_bit(0,&global_irq_lock);
}
}
static inline void
local_irq_enter (int irq)
{
local_irq_count()++;
while (test_bit(0,&global_irq_lock)) {
/* nothing */;
}
}
static inline void
local_irq_exit (int irq)
{
local_irq_count()--;
}
static inline int
local_hardirq_trylock (void)
{
return !local_irq_count() && !test_bit(0,&global_irq_lock);
}
#define local_hardirq_endlock() do { } while (0)
extern void synchronize_irq (void);
#endif /* CONFIG_SMP */
#endif /* _ASM_IA64_HARDIRQ_H */
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