softirq.h

xen 3.2.2 源码

#ifndef __XEN_SOFTIRQ_H__
#define __XEN_SOFTIRQ_H__

/* Common softirqs come first in the following list. */
#define TIMER_SOFTIRQ                     0
#define SCHEDULE_SOFTIRQ                  1
#define NEW_TLBFLUSH_CLOCK_PERIOD_SOFTIRQ 2
#define KEYPRESS_SOFTIRQ                  3
#define NMI_SOFTIRQ                       4
#define PAGE_SCRUB_SOFTIRQ                5
#define TRACE_SOFTIRQ                     6
#define RCU_SOFTIRQ                       7

#define NR_COMMON_SOFTIRQS                8

#include <asm/softirq.h>

#define NR_SOFTIRQS (NR_COMMON_SOFTIRQS + NR_ARCH_SOFTIRQS)

#ifndef __ASSEMBLY__

#include <xen/config.h>
#include <xen/lib.h>
#include <xen/smp.h>
#include <asm/bitops.h>
#include <asm/current.h>
#include <asm/hardirq.h>

typedef void (*softirq_handler)(void);

asmlinkage void do_softirq(void);
extern void open_softirq(int nr, softirq_handler handler);

static inline void cpumask_raise_softirq(cpumask_t mask, unsigned int nr)
{
    int cpu;

    for_each_cpu_mask(cpu, mask)
    {
        if ( test_and_set_bit(nr, &softirq_pending(cpu)) )
            cpu_clear(cpu, mask);
    }

    smp_send_event_check_mask(mask);
}

static inline void cpu_raise_softirq(unsigned int cpu, unsigned int nr)
{
    if ( !test_and_set_bit(nr, &softirq_pending(cpu)) )
        smp_send_event_check_cpu(cpu);
}

static inline void raise_softirq(unsigned int nr)
{
    set_bit(nr, &softirq_pending(smp_processor_id()));
}

#endif /* __ASSEMBLY__ */

#endif /* __XEN_SOFTIRQ_H__ */