#include <linux/tick.h>
#include "timekeeping.h"
+#include "tick-sched.h"
-extern seqlock_t jiffies_lock;
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
-#define CS_NAME_LEN 32
-
-#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
-
-#define TICK_DO_TIMER_NONE -1
-#define TICK_DO_TIMER_BOOT -2
+# 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 bool tick_check_replacement(struct clock_event_device *curdev,
struct clock_event_device *newdev);
extern void tick_install_replacement(struct clock_event_device *dev);
+extern int tick_is_oneshot_available(void);
+extern struct tick_device *tick_get_device(int cpu);
-extern void clockevents_shutdown(struct clock_event_device *dev);
+extern int clockevents_tick_resume(struct clock_event_device *dev);
+/* 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);
+}
+extern void clockevents_shutdown(struct clock_event_device *dev);
+extern void clockevents_exchange_device(struct clock_event_device *old,
+ struct clock_event_device *new);
+extern void clockevents_set_state(struct clock_event_device *dev,
+ enum clock_event_state state);
+extern int clockevents_program_event(struct clock_event_device *dev,
+ ktime_t expires, bool force);
+extern void clockevents_handle_noop(struct clock_event_device *dev);
+extern int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
-/*
- * NO_HZ / high resolution timer shared code
- */
+/* Broadcasting support */
+# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
+extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
+extern void tick_install_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 void tick_resume_broadcast(void);
+extern bool tick_resume_check_broadcast(void);
+extern void tick_broadcast_init(void);
+extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
+extern int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);
+extern struct tick_device *tick_get_broadcast_device(void);
+extern struct cpumask *tick_get_broadcast_mask(void);
+# else /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST: */
+static inline void tick_install_broadcast_device(struct clock_event_device *dev) { }
+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 void tick_resume_broadcast(void) { }
+static inline bool tick_resume_check_broadcast(void) { return false; }
+static inline void tick_broadcast_init(void) { }
+static inline int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq) { return -ENODEV; }
+
+/* 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 /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */
+
+#else /* !GENERIC_CLOCKEVENTS: */
+static inline void tick_suspend(void) { }
+static inline void tick_resume(void) { }
+#endif /* !GENERIC_CLOCKEVENTS */
+
+/* Oneshot related functions */
#ifdef CONFIG_TICK_ONESHOT
extern void tick_setup_oneshot(struct clock_event_device *newdev,
void (*handler)(struct clock_event_device *),
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
+static inline bool tick_oneshot_possible(void) { return true; }
+extern int tick_oneshot_mode_active(void);
+extern void tick_clock_notify(void);
+extern int tick_check_oneshot_change(int allow_nohz);
+extern int tick_init_highres(void);
+#else /* !CONFIG_TICK_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 bool tick_oneshot_possible(void) { return false; }
+static inline int tick_oneshot_mode_active(void) { return 0; }
+static inline void tick_clock_notify(void) { }
+static inline int tick_check_oneshot_change(int allow_nohz) { return 0; }
+#endif /* !CONFIG_TICK_ONESHOT */
+
+/* Functions related to oneshot broadcasting */
+#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
extern int 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_this_cpu(void);
bool tick_broadcast_oneshot_available(void);
-# else /* BROADCAST */
-static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
-{
- BUG();
-}
+extern struct cpumask *tick_get_broadcast_oneshot_mask(void);
+#else /* !(BROADCAST && ONESHOT): */
+static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { BUG(); }
static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
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_this_cpu(void) { }
-static inline bool tick_broadcast_oneshot_available(void) { return true; }
-# 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 int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
-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; }
-static inline bool tick_broadcast_oneshot_available(void) { return false; }
-#endif /* !TICK_ONESHOT */
+static inline bool tick_broadcast_oneshot_available(void) { return tick_oneshot_possible(); }
+#endif /* !(BROADCAST && ONESHOT) */
/* NO_HZ_FULL internal */
#ifdef CONFIG_NO_HZ_FULL
# else
static inline void tick_nohz_init(void) { }
#endif
-
-/*
- * Broadcasting support
- */
-#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
-extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
-extern void tick_install_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_broadcast_init(void);
-extern void
-tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
-int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);
-
-#else /* !BROADCAST */
-
-static inline void tick_install_broadcast_device(struct clock_event_device *dev)
-{
-}
-
-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; }
-static inline void tick_broadcast_init(void) { }
-static inline int tick_broadcast_update_freq(struct clock_event_device *dev,
- u32 freq) { return -ENODEV; }
-
-/*
- * 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);
-}
-
-int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
-
-#endif
-
-extern void do_timer(unsigned long ticks);
-extern void update_wall_time(void);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff