[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / include / linux / cpuidle.h

/*
 * cpuidle.h - a generic framework for CPU idle power management
 *
 * (C) 2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
 *          Shaohua Li <shaohua.li@intel.com>
 *          Adam Belay <abelay@novell.com>
 *
 * This code is licenced under the GPL.
 */

#ifndef _LINUX_CPUIDLE_H
#define _LINUX_CPUIDLE_H

#include <linux/percpu.h>
#include <linux/list.h>
#include <linux/hrtimer.h>

#define CPUIDLE_STATE_MAX	10
#define CPUIDLE_NAME_LEN	16
#define CPUIDLE_DESC_LEN	32

struct module;

struct cpuidle_device;
struct cpuidle_driver;


/****************************
 * CPUIDLE DEVICE INTERFACE *
 ****************************/

struct cpuidle_state_usage {
	unsigned long long	disable;
	unsigned long long	usage;
	unsigned long long	time; /* in US */
};

struct cpuidle_state {
	char		name[CPUIDLE_NAME_LEN];
	char		desc[CPUIDLE_DESC_LEN];

	unsigned int	flags;
	unsigned int	exit_latency; /* in US */
	int		power_usage; /* in mW */
	unsigned int	target_residency; /* in US */
	bool		disabled; /* disabled on all CPUs */

	int (*enter)	(struct cpuidle_device *dev,
			struct cpuidle_driver *drv,
			int index);

	int (*enter_dead) (struct cpuidle_device *dev, int index);

	/*
	 * CPUs execute ->enter_s2idle with the local tick or entire timekeeping
	 * suspended, so it must not re-enable interrupts at any point (even
	 * temporarily) or attempt to change states of clock event devices.
	 */
	void (*enter_s2idle) (struct cpuidle_device *dev,
			      struct cpuidle_driver *drv,
			      int index);
};

/* Idle State Flags */
#define CPUIDLE_FLAG_NONE       (0x00)
#define CPUIDLE_FLAG_POLLING	(0x01) /* polling state */
#define CPUIDLE_FLAG_COUPLED	(0x02) /* state applies to multiple cpus */
#define CPUIDLE_FLAG_TIMER_STOP (0x04)  /* timer is stopped on this state */

#define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)

struct cpuidle_device_kobj;
struct cpuidle_state_kobj;
struct cpuidle_driver_kobj;

struct cpuidle_device {
	unsigned int		registered:1;
	unsigned int		enabled:1;
	unsigned int		use_deepest_state:1;
	unsigned int		cpu;

	int			last_residency;
	struct cpuidle_state_usage	states_usage[CPUIDLE_STATE_MAX];
	struct cpuidle_state_kobj *kobjs[CPUIDLE_STATE_MAX];
	struct cpuidle_driver_kobj *kobj_driver;
	struct cpuidle_device_kobj *kobj_dev;
	struct list_head 	device_list;

#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
	cpumask_t		coupled_cpus;
	struct cpuidle_coupled	*coupled;
#endif
};

DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev);

/**
 * cpuidle_get_last_residency - retrieves the last state's residency time
 * @dev: the target CPU
 */
static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
{
	return dev->last_residency;
}


/****************************
 * CPUIDLE DRIVER INTERFACE *
 ****************************/

struct cpuidle_driver {
	const char		*name;
	struct module 		*owner;
	int                     refcnt;

        /* used by the cpuidle framework to setup the broadcast timer */
	unsigned int            bctimer:1;
	/* states array must be ordered in decreasing power consumption */
	struct cpuidle_state	states[CPUIDLE_STATE_MAX];
	int			state_count;
	int			safe_state_index;

	/* the driver handles the cpus in cpumask */
	struct cpumask		*cpumask;
};

#ifdef CONFIG_CPU_IDLE
extern void disable_cpuidle(void);
extern bool cpuidle_not_available(struct cpuidle_driver *drv,
				  struct cpuidle_device *dev);

extern int cpuidle_select(struct cpuidle_driver *drv,
			  struct cpuidle_device *dev,
			  bool *stop_tick);
extern int cpuidle_enter(struct cpuidle_driver *drv,
			 struct cpuidle_device *dev, int index);
extern void cpuidle_reflect(struct cpuidle_device *dev, int index);

extern int cpuidle_register_driver(struct cpuidle_driver *drv);
extern struct cpuidle_driver *cpuidle_get_driver(void);
extern struct cpuidle_driver *cpuidle_driver_ref(void);
extern void cpuidle_driver_unref(void);
extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
extern int cpuidle_register_device(struct cpuidle_device *dev);
extern void cpuidle_unregister_device(struct cpuidle_device *dev);
extern int cpuidle_register(struct cpuidle_driver *drv,
			    const struct cpumask *const coupled_cpus);
extern void cpuidle_unregister(struct cpuidle_driver *drv);
extern void cpuidle_pause_and_lock(void);
extern void cpuidle_resume_and_unlock(void);
extern void cpuidle_pause(void);
extern void cpuidle_resume(void);
extern int cpuidle_enable_device(struct cpuidle_device *dev);
extern void cpuidle_disable_device(struct cpuidle_device *dev);
extern int cpuidle_play_dead(void);

extern struct cpuidle_driver *cpuidle_get_cpu_driver(struct cpuidle_device *dev);
static inline struct cpuidle_device *cpuidle_get_device(void)
{return __this_cpu_read(cpuidle_devices); }
extern unsigned int cpuidle_get_target_residency(int cpu, int state);
#else
static inline void disable_cpuidle(void) { }
static inline bool cpuidle_not_available(struct cpuidle_driver *drv,
					 struct cpuidle_device *dev)
{return true; }
static inline int cpuidle_select(struct cpuidle_driver *drv,
				 struct cpuidle_device *dev, bool *stop_tick)
{return -ENODEV; }
static inline int cpuidle_enter(struct cpuidle_driver *drv,
				struct cpuidle_device *dev, int index)
{return -ENODEV; }
static inline void cpuidle_reflect(struct cpuidle_device *dev, int index) { }
static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
{return -ENODEV; }
static inline struct cpuidle_driver *cpuidle_get_driver(void) {return NULL; }
static inline struct cpuidle_driver *cpuidle_driver_ref(void) {return NULL; }
static inline void cpuidle_driver_unref(void) {}
static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
static inline int cpuidle_register_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
static inline int cpuidle_register(struct cpuidle_driver *drv,
				   const struct cpumask *const coupled_cpus)
{return -ENODEV; }
static inline void cpuidle_unregister(struct cpuidle_driver *drv) { }
static inline void cpuidle_pause_and_lock(void) { }
static inline void cpuidle_resume_and_unlock(void) { }
static inline void cpuidle_pause(void) { }
static inline void cpuidle_resume(void) { }
static inline int cpuidle_enable_device(struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
static inline int cpuidle_play_dead(void) {return -ENODEV; }
static inline struct cpuidle_driver *cpuidle_get_cpu_driver(
	struct cpuidle_device *dev) {return NULL; }
static inline struct cpuidle_device *cpuidle_get_device(void) {return NULL; }
static inline unsigned int cpuidle_get_target_residency(int cpu, int state) {return UINT_MAX;}
#endif

#ifdef CONFIG_CPU_IDLE
extern int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
				      struct cpuidle_device *dev);
extern int cpuidle_enter_s2idle(struct cpuidle_driver *drv,
				struct cpuidle_device *dev);
extern void cpuidle_use_deepest_state(bool enable);
#else
static inline int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
					     struct cpuidle_device *dev)
{return -ENODEV; }
static inline int cpuidle_enter_s2idle(struct cpuidle_driver *drv,
				       struct cpuidle_device *dev)
{return -ENODEV; }
static inline void cpuidle_use_deepest_state(bool enable)
{
}
#endif

/* kernel/sched/idle.c */
extern void sched_idle_set_state(struct cpuidle_state *idle_state, int index);
extern void default_idle_call(void);

#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev, atomic_t *a);
#else
static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev, atomic_t *a)
{
}
#endif

#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_ARCH_HAS_CPU_RELAX)
void cpuidle_poll_state_init(struct cpuidle_driver *drv);
#else
static inline void cpuidle_poll_state_init(struct cpuidle_driver *drv) {}
#endif

/******************************
 * CPUIDLE GOVERNOR INTERFACE *
 ******************************/

struct cpuidle_governor {
	char			name[CPUIDLE_NAME_LEN];
	struct list_head 	governor_list;
	unsigned int		rating;

	int  (*enable)		(struct cpuidle_driver *drv,
					struct cpuidle_device *dev);
	void (*disable)		(struct cpuidle_driver *drv,
					struct cpuidle_device *dev);

	int  (*select)		(struct cpuidle_driver *drv,
					struct cpuidle_device *dev,
					bool *stop_tick);
	void (*reflect)		(struct cpuidle_device *dev, int index);
};

#ifdef CONFIG_CPU_IDLE
extern int cpuidle_register_governor(struct cpuidle_governor *gov);
#else
static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
{return 0;}
#endif

#define CPU_PM_CPU_IDLE_ENTER(low_level_idle_enter, idx)	\
({								\
	int __ret;						\
								\
	if (!idx) {						\
		cpu_do_idle();					\
		return idx;					\
	}							\
								\
	__ret = cpu_pm_enter();					\
	if (!__ret) {						\
		__ret = low_level_idle_enter(idx);		\
		cpu_pm_exit();					\
	}							\
								\
	__ret ? -1 : idx;					\
})

#endif /* _LINUX_CPUIDLE_H */
Commit	Line	Data
4f86d3a8 LB	1	/*
	2	* cpuidle.h - a generic framework for CPU idle power management
	3	*
	4	* (C) 2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
	5	* Shaohua Li <shaohua.li@intel.com>
	6	* Adam Belay <abelay@novell.com>
	7	*
	8	* This code is licenced under the GPL.
	9	*/
	10
	11	#ifndef _LINUX_CPUIDLE_H
	12	#define _LINUX_CPUIDLE_H
	13
	14	#include <linux/percpu.h>
	15	#include <linux/list.h>
e1689795	16	#include <linux/hrtimer.h>
4f86d3a8	17
86239ceb	18	#define CPUIDLE_STATE_MAX 10
4f86d3a8	19	#define CPUIDLE_NAME_LEN 16
4fcb2fcd	20	#define CPUIDLE_DESC_LEN 32
4f86d3a8	21
de477254 PG	22	struct module;
de477254 PG	23
4f86d3a8	24	struct cpuidle_device;
46bcfad7	25	struct cpuidle_driver;
4f86d3a8 LB	26
	27
	28	/****************************
	29	* CPUIDLE DEVICE INTERFACE *
	30	****************************/
	31
4202735e	32	struct cpuidle_state_usage {
dc7fd275	33	unsigned long long disable;
4202735e DD	34	unsigned long long usage;
	35	unsigned long long time; /* in US */
	36	};
	37
4f86d3a8 LB	38	struct cpuidle_state {
4f86d3a8 LB	39	char name[CPUIDLE_NAME_LEN];
4fcb2fcd	40	char desc[CPUIDLE_DESC_LEN];
4f86d3a8 LB	41
	42	unsigned int flags;
	43	unsigned int exit_latency; /* in US */
02401c06	44	int power_usage; /* in mW */
4f86d3a8	45	unsigned int target_residency; /* in US */
cbc9ef02	46	bool disabled; /* disabled on all CPUs */
4f86d3a8	47
4f86d3a8	48	int (enter) (struct cpuidle_device dev,
46bcfad7	49	struct cpuidle_driver *drv,
e978aa7d	50	int index);
1a022e3f BO	51
1a022e3f BO	52	int (enter_dead) (struct cpuidle_device dev, int index);
124cf911 RW	53
124cf911 RW	54	/*
28ba086e	55	* CPUs execute ->enter_s2idle with the local tick or entire timekeeping
124cf911 RW	56	* suspended, so it must not re-enable interrupts at any point (even
	57	* temporarily) or attempt to change states of clock event devices.
	58	*/
28ba086e	59	void (enter_s2idle) (struct cpuidle_device dev,
124cf911 RW	60	struct cpuidle_driver *drv,
124cf911 RW	61	int index);
4f86d3a8 LB	62	};
	63
	64	/* Idle State Flags */
9e9fc6f0	65	#define CPUIDLE_FLAG_NONE (0x00)
dc2251bf	66	#define CPUIDLE_FLAG_POLLING (0x01) /* polling state */
4126c019	67	#define CPUIDLE_FLAG_COUPLED (0x02) /* state applies to multiple cpus */
b60e6a0e	68	#define CPUIDLE_FLAG_TIMER_STOP (0x04) /* timer is stopped on this state */
4f86d3a8 LB	69
	70	#define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
	71
728ce22b	72	struct cpuidle_device_kobj;
1a706438 DL	73	struct cpuidle_state_kobj;
1a706438 DL	74	struct cpuidle_driver_kobj;
728ce22b	75
4f86d3a8	76	struct cpuidle_device {
dcb84f33	77	unsigned int registered:1;
b5556a67	78	unsigned int enabled:1;
bb8313b6	79	unsigned int use_deepest_state:1;
4f86d3a8 LB	80	unsigned int cpu;
	81
	82	int last_residency;
4202735e	83	struct cpuidle_state_usage states_usage[CPUIDLE_STATE_MAX];
4f86d3a8	84	struct cpuidle_state_kobj *kobjs[CPUIDLE_STATE_MAX];
bf4d1b5d	85	struct cpuidle_driver_kobj *kobj_driver;
728ce22b	86	struct cpuidle_device_kobj *kobj_dev;
4f86d3a8	87	struct list_head device_list;
4126c019 CC	88
4126c019 CC	89	#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
4126c019 CC	90	cpumask_t coupled_cpus;
	91	struct cpuidle_coupled *coupled;
	92	#endif
4f86d3a8 LB	93	};
	94
	95	DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices);
f08dbf8a	96	DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev);
4f86d3a8 LB	97
	98	/**
	99	* cpuidle_get_last_residency - retrieves the last state's residency time
	100	* @dev: the target CPU
4f86d3a8 LB	101	*/
	102	static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
	103	{
	104	return dev->last_residency;
	105	}
	106
	107
	108	/****************************
	109	* CPUIDLE DRIVER INTERFACE *
	110	****************************/
	111
	112	struct cpuidle_driver {
db70b044	113	const char *name;
4f86d3a8	114	struct module *owner;
42f67f2a	115	int refcnt;
46bcfad7	116
a06df062 DL	117	/* used by the cpuidle framework to setup the broadcast timer */
a06df062 DL	118	unsigned int bctimer:1;
8aef33a7	119	/* states array must be ordered in decreasing power consumption */
46bcfad7 DD	120	struct cpuidle_state states[CPUIDLE_STATE_MAX];
	121	int state_count;
	122	int safe_state_index;
82467a5a DL	123
82467a5a DL	124	/* the driver handles the cpus in cpumask */
6587fca2	125	struct cpumask *cpumask;
4f86d3a8 LB	126	};
	127
	128	#ifdef CONFIG_CPU_IDLE
d91ee586	129	extern void disable_cpuidle(void);
ef2b22ac RW	130	extern bool cpuidle_not_available(struct cpuidle_driver *drv,
ef2b22ac RW	131	struct cpuidle_device *dev);
907e30f1	132
907e30f1	133	extern int cpuidle_select(struct cpuidle_driver *drv,
3a25735b RW	134	struct cpuidle_device *dev,
3a25735b RW	135	bool *stop_tick);
907e30f1 DL	136	extern int cpuidle_enter(struct cpuidle_driver *drv,
	137	struct cpuidle_device *dev, int index);
	138	extern void cpuidle_reflect(struct cpuidle_device *dev, int index);
	139
4f86d3a8	140	extern int cpuidle_register_driver(struct cpuidle_driver *drv);
6e797a07 RW	141	extern struct cpuidle_driver *cpuidle_get_driver(void);
	142	extern struct cpuidle_driver *cpuidle_driver_ref(void);
	143	extern void cpuidle_driver_unref(void);
4f86d3a8 LB	144	extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
	145	extern int cpuidle_register_device(struct cpuidle_device *dev);
	146	extern void cpuidle_unregister_device(struct cpuidle_device *dev);
4c637b21 DL	147	extern int cpuidle_register(struct cpuidle_driver *drv,
	148	const struct cpumask *const coupled_cpus);
	149	extern void cpuidle_unregister(struct cpuidle_driver *drv);
4f86d3a8 LB	150	extern void cpuidle_pause_and_lock(void);
4f86d3a8 LB	151	extern void cpuidle_resume_and_unlock(void);
8651f97b PM	152	extern void cpuidle_pause(void);
8651f97b PM	153	extern void cpuidle_resume(void);
4f86d3a8 LB	154	extern int cpuidle_enable_device(struct cpuidle_device *dev);
4f86d3a8 LB	155	extern void cpuidle_disable_device(struct cpuidle_device *dev);
1a022e3f BO	156	extern int cpuidle_play_dead(void);
1a022e3f BO	157
bf4d1b5d	158	extern struct cpuidle_driver cpuidle_get_cpu_driver(struct cpuidle_device dev);
9bd616e3 CM	159	static inline struct cpuidle_device *cpuidle_get_device(void)
9bd616e3 CM	160	{return __this_cpu_read(cpuidle_devices); }
642a403b	161	extern unsigned int cpuidle_get_target_residency(int cpu, int state);
4f86d3a8	162	#else
d91ee586	163	static inline void disable_cpuidle(void) { }
ef2b22ac RW	164	static inline bool cpuidle_not_available(struct cpuidle_driver *drv,
	165	struct cpuidle_device *dev)
	166	{return true; }
907e30f1	167	static inline int cpuidle_select(struct cpuidle_driver *drv,
3a25735b	168	struct cpuidle_device dev, bool stop_tick)
907e30f1 DL	169	{return -ENODEV; }
	170	static inline int cpuidle_enter(struct cpuidle_driver *drv,
	171	struct cpuidle_device *dev, int index)
	172	{return -ENODEV; }
	173	static inline void cpuidle_reflect(struct cpuidle_device *dev, int index) { }
4f86d3a8	174	static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
6b2c676b	175	{return -ENODEV; }
752138df	176	static inline struct cpuidle_driver *cpuidle_get_driver(void) {return NULL; }
6e797a07 RW	177	static inline struct cpuidle_driver *cpuidle_driver_ref(void) {return NULL; }
6e797a07 RW	178	static inline void cpuidle_driver_unref(void) {}
4f86d3a8 LB	179	static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
4f86d3a8 LB	180	static inline int cpuidle_register_device(struct cpuidle_device *dev)
6b2c676b	181	{return -ENODEV; }
4f86d3a8	182	static inline void cpuidle_unregister_device(struct cpuidle_device *dev) { }
4c637b21 DL	183	static inline int cpuidle_register(struct cpuidle_driver *drv,
	184	const struct cpumask *const coupled_cpus)
	185	{return -ENODEV; }
	186	static inline void cpuidle_unregister(struct cpuidle_driver *drv) { }
4f86d3a8 LB	187	static inline void cpuidle_pause_and_lock(void) { }
4f86d3a8 LB	188	static inline void cpuidle_resume_and_unlock(void) { }
8651f97b PM	189	static inline void cpuidle_pause(void) { }
8651f97b PM	190	static inline void cpuidle_resume(void) { }
4f86d3a8	191	static inline int cpuidle_enable_device(struct cpuidle_device *dev)
6b2c676b	192	{return -ENODEV; }
4f86d3a8	193	static inline void cpuidle_disable_device(struct cpuidle_device *dev) { }
1a022e3f	194	static inline int cpuidle_play_dead(void) {return -ENODEV; }
87e9b9f1 RW	195	static inline struct cpuidle_driver *cpuidle_get_cpu_driver(
87e9b9f1 RW	196	struct cpuidle_device *dev) {return NULL; }
9bd616e3	197	static inline struct cpuidle_device *cpuidle_get_device(void) {return NULL; }
642a403b	198	static inline unsigned int cpuidle_get_target_residency(int cpu, int state) {return UINT_MAX;}
87e9b9f1 RW	199	#endif
87e9b9f1 RW	200
bb8313b6	201	#ifdef CONFIG_CPU_IDLE
87e9b9f1 RW	202	extern int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
87e9b9f1 RW	203	struct cpuidle_device *dev);
28ba086e	204	extern int cpuidle_enter_s2idle(struct cpuidle_driver *drv,
87e9b9f1	205	struct cpuidle_device *dev);
bb8313b6	206	extern void cpuidle_use_deepest_state(bool enable);
87e9b9f1	207	#else
ef2b22ac RW	208	static inline int cpuidle_find_deepest_state(struct cpuidle_driver *drv,
	209	struct cpuidle_device *dev)
	210	{return -ENODEV; }
28ba086e	211	static inline int cpuidle_enter_s2idle(struct cpuidle_driver *drv,
ef2b22ac RW	212	struct cpuidle_device *dev)
ef2b22ac RW	213	{return -ENODEV; }
bb8313b6 JP	214	static inline void cpuidle_use_deepest_state(bool enable)
	215	{
	216	}
4f86d3a8 LB	217	#endif
4f86d3a8 LB	218
faad3849	219	/* kernel/sched/idle.c */
a732c974	220	extern void sched_idle_set_state(struct cpuidle_state *idle_state, int index);
827a5aef	221	extern void default_idle_call(void);
faad3849	222
20ff51a3 CC	223	#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
20ff51a3 CC	224	void cpuidle_coupled_parallel_barrier(struct cpuidle_device dev, atomic_t a);
c7a9b09b AB	225	#else
	226	static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device dev, atomic_t a)
	227	{
	228	}
20ff51a3 CC	229	#endif
20ff51a3 CC	230
e578fedb	231	#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_ARCH_HAS_CPU_RELAX)
1b39e3f8	232	void cpuidle_poll_state_init(struct cpuidle_driver *drv);
34c2f65b	233	#else
1b39e3f8	234	static inline void cpuidle_poll_state_init(struct cpuidle_driver *drv) {}
34c2f65b RW	235	#endif
34c2f65b RW	236
4f86d3a8 LB	237	/******************************
	238	* CPUIDLE GOVERNOR INTERFACE *
	239	******************************/
	240
	241	struct cpuidle_governor {
	242	char name[CPUIDLE_NAME_LEN];
	243	struct list_head governor_list;
	244	unsigned int rating;
	245
46bcfad7 DD	246	int (enable) (struct cpuidle_driver drv,
	247	struct cpuidle_device *dev);
	248	void (disable) (struct cpuidle_driver drv,
	249	struct cpuidle_device *dev);
4f86d3a8	250
46bcfad7	251	int (select) (struct cpuidle_driver drv,
3a25735b RW	252	struct cpuidle_device *dev,
3a25735b RW	253	bool *stop_tick);
e978aa7d	254	void (reflect) (struct cpuidle_device dev, int index);
4f86d3a8 LB	255	};
	256
	257	#ifdef CONFIG_CPU_IDLE
4f86d3a8	258	extern int cpuidle_register_governor(struct cpuidle_governor *gov);
4f86d3a8	259	#else
4f86d3a8 LB	260	static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
4f86d3a8 LB	261	{return 0;}
4f86d3a8 LB	262	#endif
4f86d3a8 LB	263
220276e0 SH	264	#define CPU_PM_CPU_IDLE_ENTER(low_level_idle_enter, idx) \
	265	({ \
	266	int __ret; \
	267	\
	268	if (!idx) { \
	269	cpu_do_idle(); \
	270	return idx; \
	271	} \
	272	\
	273	__ret = cpu_pm_enter(); \
	274	if (!__ret) { \
	275	__ret = low_level_idle_enter(idx); \
	276	cpu_pm_exit(); \
	277	} \
	278	\
	279	__ret ? -1 : idx; \
	280	})
	281
4f86d3a8	282	#endif /* _LINUX_CPUIDLE_H */