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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 really_local_irq_count() (local_cpu_data->irq_stat.f.irq_count) /* XXX fix me */
- #define really_local_bh_count() (local_cpu_data->irq_stat.f.bh_count) /* XXX fix me */
- #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() (really_local_irq_count() == 0)
- # define local_hardirq_endlock() do { } while (0)
- # define local_irq_enter(irq) (really_local_irq_count()++)
- # define local_irq_exit(irq) (really_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;
- smp_mb__before_clear_bit(); /* need barrier before releasing lock... */
- clear_bit(0,&global_irq_lock);
- }
- }
- static inline void
- local_irq_enter (int irq)
- {
- really_local_irq_count()++;
- while (test_bit(0,&global_irq_lock)) {
- /* nothing */;
- }
- }
- static inline void
- local_irq_exit (int irq)
- {
- really_local_irq_count()--;
- }
- static inline int
- local_hardirq_trylock (void)
- {
- return !really_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 */