6321dd60c7
The programming of periodic tick devices needs to be saved/restored across suspend/resume - otherwise we might end up with a system coming up that relies on getting a PIT (or HPET) interrupt, while those devices default to 'no interrupts' after powerup. (To confuse things it worked to a certain degree on some systems because the lapic gets initialized as a side-effect of SMP bootup.) This suspend / resume thing was dropped unintentionally during the last-minute -mm code reshuffling. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
|
|
* tick internal variable and functions used by low/high res code
|
|
*/
|
|
DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
|
|
extern spinlock_t tick_device_lock;
|
|
extern ktime_t tick_next_period;
|
|
extern ktime_t tick_period;
|
|
|
|
extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
|
|
extern void tick_handle_periodic(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_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 *));
|
|
|
|
# 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);
|
|
# 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) { }
|
|
# 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 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) { }
|
|
#endif /* !TICK_ONESHOT */
|
|
|
|
/*
|
|
* Broadcasting support
|
|
*/
|
|
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
|
|
extern int tick_do_broadcast(cpumask_t mask);
|
|
|
|
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);
|
|
}
|