mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
d192c47f25
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
135 lines
4.4 KiB
C
135 lines
4.4 KiB
C
/*
|
|
* tick internal variable and functions used by low/high res code
|
|
*/
|
|
|
|
#define TICK_DO_TIMER_NONE -1
|
|
#define TICK_DO_TIMER_BOOT -2
|
|
|
|
DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
|
|
extern ktime_t tick_next_period;
|
|
extern ktime_t tick_period;
|
|
extern int tick_do_timer_cpu __read_mostly;
|
|
|
|
extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
|
|
extern void tick_handle_periodic(struct clock_event_device *dev);
|
|
|
|
extern void clockevents_shutdown(struct clock_event_device *dev);
|
|
|
|
/*
|
|
* NO_HZ / high resolution timer shared code
|
|
*/
|
|
#ifdef CONFIG_TICK_ONESHOT
|
|
extern void tick_setup_oneshot(struct clock_event_device *newdev,
|
|
void (*handler)(struct clock_event_device *),
|
|
ktime_t nextevt);
|
|
extern int tick_dev_program_event(struct clock_event_device *dev,
|
|
ktime_t expires, int force);
|
|
extern int tick_program_event(ktime_t expires, int force);
|
|
extern void tick_oneshot_notify(void);
|
|
extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
|
|
extern void tick_resume_oneshot(void);
|
|
# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
|
|
extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
|
|
extern void tick_broadcast_oneshot_control(unsigned long reason);
|
|
extern void tick_broadcast_switch_to_oneshot(void);
|
|
extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
|
|
extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
|
|
extern int tick_broadcast_oneshot_active(void);
|
|
extern void tick_check_oneshot_broadcast(int cpu);
|
|
# else /* BROADCAST */
|
|
static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
|
|
{
|
|
BUG();
|
|
}
|
|
static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
|
|
static inline void tick_broadcast_switch_to_oneshot(void) { }
|
|
static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
|
|
static inline int tick_broadcast_oneshot_active(void) { return 0; }
|
|
static inline void tick_check_oneshot_broadcast(int cpu) { }
|
|
# endif /* !BROADCAST */
|
|
|
|
#else /* !ONESHOT */
|
|
static inline
|
|
void tick_setup_oneshot(struct clock_event_device *newdev,
|
|
void (*handler)(struct clock_event_device *),
|
|
ktime_t nextevt)
|
|
{
|
|
BUG();
|
|
}
|
|
static inline void tick_resume_oneshot(void)
|
|
{
|
|
BUG();
|
|
}
|
|
static inline int tick_program_event(ktime_t expires, int force)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void tick_oneshot_notify(void) { }
|
|
static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
|
|
{
|
|
BUG();
|
|
}
|
|
static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
|
|
static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
|
|
static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int tick_broadcast_oneshot_active(void) { return 0; }
|
|
#endif /* !TICK_ONESHOT */
|
|
|
|
/*
|
|
* Broadcasting support
|
|
*/
|
|
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
|
|
extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
|
|
extern int tick_check_broadcast_device(struct clock_event_device *dev);
|
|
extern int tick_is_broadcast_device(struct clock_event_device *dev);
|
|
extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
|
|
extern void tick_shutdown_broadcast(unsigned int *cpup);
|
|
extern void tick_suspend_broadcast(void);
|
|
extern int tick_resume_broadcast(void);
|
|
|
|
extern void
|
|
tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
|
|
|
|
#else /* !BROADCAST */
|
|
|
|
static inline int tick_check_broadcast_device(struct clock_event_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int tick_is_broadcast_device(struct clock_event_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
|
|
int cpu)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
|
|
static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
|
|
static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
|
|
static inline void tick_suspend_broadcast(void) { }
|
|
static inline int tick_resume_broadcast(void) { return 0; }
|
|
|
|
/*
|
|
* Set the periodic handler in non broadcast mode
|
|
*/
|
|
static inline void tick_set_periodic_handler(struct clock_event_device *dev,
|
|
int broadcast)
|
|
{
|
|
dev->event_handler = tick_handle_periodic;
|
|
}
|
|
#endif /* !BROADCAST */
|
|
|
|
/*
|
|
* Check, if the device is functional or a dummy for broadcast
|
|
*/
|
|
static inline int tick_device_is_functional(struct clock_event_device *dev)
|
|
{
|
|
return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
|
|
}
|