/*  linux/include/linux/clockchips.h * *  This file contains the structure definitions for clockchips. * *  If you are not a clockchip, or the time of day code, you should *  not be including this file! */#ifndef _LINUX_CLOCKCHIPS_H#define _LINUX_CLOCKCHIPS_H /* Clock event notification values */enum clock_event_nofitiers {	CLOCK_EVT_NOTIFY_ADD,	CLOCK_EVT_NOTIFY_BROADCAST_ON,	CLOCK_EVT_NOTIFY_BROADCAST_OFF,	CLOCK_EVT_NOTIFY_BROADCAST_FORCE,	CLOCK_EVT_NOTIFY_BROADCAST_ENTER,	CLOCK_EVT_NOTIFY_BROADCAST_EXIT,	CLOCK_EVT_NOTIFY_SUSPEND,	CLOCK_EVT_NOTIFY_RESUME,	CLOCK_EVT_NOTIFY_CPU_DYING,	CLOCK_EVT_NOTIFY_CPU_DEAD,}; #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD #include <linux/clocksource.h>#include <linux/cpumask.h>#include <linux/ktime.h>#include <linux/notifier.h> struct clock_event_device;struct module; /* Clock event mode commands */enum clock_event_mode {	CLOCK_EVT_MODE_UNUSED = 0,	CLOCK_EVT_MODE_SHUTDOWN,	CLOCK_EVT_MODE_PERIODIC,	CLOCK_EVT_MODE_ONESHOT,	CLOCK_EVT_MODE_RESUME,}; /* * Clock event features */#define CLOCK_EVT_FEAT_PERIODIC		0x000001#define CLOCK_EVT_FEAT_ONESHOT		0x000002#define CLOCK_EVT_FEAT_KTIME		0x000004/* * x86(64) specific misfeatures: * * - Clockevent source stops in C3 State and needs broadcast support. * - Local APIC timer is used as a dummy device. */#define CLOCK_EVT_FEAT_C3STOP		0x000008#define CLOCK_EVT_FEAT_DUMMY		0x000010 /* * Core shall set the interrupt affinity dynamically in broadcast mode */#define CLOCK_EVT_FEAT_DYNIRQ		0x000020 /** * struct clock_event_device - clock event device descriptor * @event_handler:	Assigned by the framework to be called by the low *			level handler of the event source * @set_next_event:	set next event function using a clocksource delta * @set_next_ktime:	set next event function using a direct ktime value * @next_event:		local storage for the next event in oneshot mode * @max_delta_ns:	maximum delta value in ns * @min_delta_ns:	minimum delta value in ns * @mult:		nanosecond to cycles multiplier * @shift:		nanoseconds to cycles divisor (power of two) * @mode:		operating mode assigned by the management code * @features:		features * @retries:		number of forced programming retries * @set_mode:		set mode function * @broadcast:		function to broadcast events * @min_delta_ticks:	minimum delta value in ticks stored for reconfiguration * @max_delta_ticks:	maximum delta value in ticks stored for reconfiguration * @name:		ptr to clock event name * @rating:		variable to rate clock event devices * @irq:		IRQ number (only for non CPU local devices) * @cpumask:		cpumask to indicate for which CPUs this device works * @list:		list head for the management code * @owner:		module reference */struct clock_event_device {	void			(*event_handler)(struct clock_event_device *);	int			(*set_next_event)(unsigned long evt,						  struct clock_event_device *);	int			(*set_next_ktime)(ktime_t expires,						  struct clock_event_device *);	ktime_t			next_event;	u64			max_delta_ns;	u64			min_delta_ns;	u32			mult;	u32			shift;	enum clock_event_mode	mode;	unsigned int		features;	unsigned long		retries; 	void			(*broadcast)(const struct cpumask *mask);	void			(*set_mode)(enum clock_event_mode mode,					    struct clock_event_device *);	void			(*suspend)(struct clock_event_device *);	void			(*resume)(struct clock_event_device *);	unsigned long		min_delta_ticks;	unsigned long		max_delta_ticks; 	const char		*name;	int			rating;	int			irq;	const struct cpumask	*cpumask;	struct list_head	list;	struct module		*owner;} ____cacheline_aligned; /* * Calculate a multiplication factor for scaled math, which is used to convert * nanoseconds based values to clock ticks: * * clock_ticks = (nanoseconds * factor) >> shift. * * div_sc is the rearranged equation to calculate a factor from a given clock * ticks / nanoseconds ratio: * * factor = (clock_ticks << shift) / nanoseconds */static inline unsigned long div_sc(unsigned long ticks, unsigned long nsec,				   int shift){	uint64_t tmp = ((uint64_t)ticks) << shift; 	do_div(tmp, nsec);	return (unsigned long) tmp;} /* Clock event layer functions */extern u64 clockevent_delta2ns(unsigned long latch,			       struct clock_event_device *evt);extern void clockevents_register_device(struct clock_event_device *dev);extern int clockevents_unbind_device(struct clock_event_device *ced, int cpu); extern void clockevents_config(struct clock_event_device *dev, u32 freq);extern void clockevents_config_and_register(struct clock_event_device *dev,					    u32 freq, unsigned long min_delta,					    unsigned long max_delta); extern int clockevents_update_freq(struct clock_event_device *ce, u32 freq); extern void clockevents_exchange_device(struct clock_event_device *old,					struct clock_event_device *new);extern void clockevents_set_mode(struct clock_event_device *dev,				 enum clock_event_mode mode);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); static inline voidclockevents_calc_mult_shift(struct clock_event_device *ce, u32 freq, u32 minsec){	return clocks_calc_mult_shift(&ce->mult, &ce->shift, NSEC_PER_SEC,				      freq, minsec);} extern void clockevents_suspend(void);extern void clockevents_resume(void); #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST#ifdef CONFIG_ARCH_HAS_TICK_BROADCASTextern void tick_broadcast(const struct cpumask *mask);#else#define tick_broadcast	NULL#endifextern int tick_receive_broadcast(void);#endif #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)extern int tick_check_broadcast_expired(void);#elsestatic inline int tick_check_broadcast_expired(void) { return 0; }#endif #ifdef CONFIG_GENERIC_CLOCKEVENTSextern void clockevents_notify(unsigned long reason, void *arg);#elsestatic inline void clockevents_notify(unsigned long reason, void *arg) {}#endif #else /* CONFIG_GENERIC_CLOCKEVENTS_BUILD */ static inline void clockevents_suspend(void) {}static inline void clockevents_resume(void) {} static inline void clockevents_notify(unsigned long reason, void *arg) {}static inline int tick_check_broadcast_expired(void) { return 0; } #endif #endif