#ifndef _LINUX_CPU_H_
#define _LINUX_CPU_H_

#include <linux/node.h>
#include <linux/compiler.h>
#include <linux/cpumask.h>

struct device;

struct cpu {
	int node_id;		
	int hotpluggable;	
	struct device dev;
};

extern int register_cpu(struct cpu *cpu, int num);
extern struct device *get_cpu_device(unsigned cpu);
extern bool cpu_is_hotpluggable(unsigned cpu);

extern int cpu_add_dev_attr(struct device_attribute *attr);
extern void cpu_remove_dev_attr(struct device_attribute *attr);

extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);

extern int sched_create_sysfs_power_savings_entries(struct device *dev);

#ifdef CONFIG_HOTPLUG_CPU
extern void unregister_cpu(struct cpu *cpu);
extern ssize_t arch_cpu_probe(const char *, size_t);
extern ssize_t arch_cpu_release(const char *, size_t);
#endif
struct notifier_block;

#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
extern int arch_cpu_uevent(struct device *dev, struct kobj_uevent_env *env);
extern ssize_t arch_print_cpu_modalias(struct device *dev,
				       struct device_attribute *attr,
				       char *bufptr);
#endif

enum {
	CPU_PRI_SCHED_ACTIVE	= INT_MAX,
	CPU_PRI_CPUSET_ACTIVE	= INT_MAX - 1,
	CPU_PRI_SCHED_INACTIVE	= INT_MIN + 1,
	CPU_PRI_CPUSET_INACTIVE	= INT_MIN,

	
	CPU_PRI_PERF		= 20,
	CPU_PRI_MIGRATION	= 10,
	
	CPU_PRI_WORKQUEUE_UP	= 5,
	CPU_PRI_WORKQUEUE_DOWN	= -5,
};

#define CPU_ONLINE		0x0002 
#define CPU_UP_PREPARE		0x0003 
#define CPU_UP_CANCELED		0x0004 
#define CPU_DOWN_PREPARE	0x0005 
#define CPU_DOWN_FAILED		0x0006 
#define CPU_DEAD		0x0007 
#define CPU_DYING		0x0008 
#define CPU_POST_DEAD		0x0009 
#define CPU_STARTING		0x000A 

#define CPU_TASKS_FROZEN	0x0010

#define CPU_ONLINE_FROZEN	(CPU_ONLINE | CPU_TASKS_FROZEN)
#define CPU_UP_PREPARE_FROZEN	(CPU_UP_PREPARE | CPU_TASKS_FROZEN)
#define CPU_UP_CANCELED_FROZEN	(CPU_UP_CANCELED | CPU_TASKS_FROZEN)
#define CPU_DOWN_PREPARE_FROZEN	(CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
#define CPU_DOWN_FAILED_FROZEN	(CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
#define CPU_DEAD_FROZEN		(CPU_DEAD | CPU_TASKS_FROZEN)
#define CPU_DYING_FROZEN	(CPU_DYING | CPU_TASKS_FROZEN)
#define CPU_STARTING_FROZEN	(CPU_STARTING | CPU_TASKS_FROZEN)


#ifdef CONFIG_SMP
#if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE)
#define cpu_notifier(fn, pri) {					\
	static struct notifier_block fn##_nb __cpuinitdata =	\
		{ .notifier_call = fn, .priority = pri };	\
	register_cpu_notifier(&fn##_nb);			\
}
#else 
#define cpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#endif 
#ifdef CONFIG_HOTPLUG_CPU
extern int register_cpu_notifier(struct notifier_block *nb);
extern void unregister_cpu_notifier(struct notifier_block *nb);
#else

#ifndef MODULE
extern int register_cpu_notifier(struct notifier_block *nb);
#else
static inline int register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}
#endif

static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}
#endif

int cpu_up(unsigned int cpu);
void notify_cpu_starting(unsigned int cpu);
extern void cpu_maps_update_begin(void);
extern void cpu_maps_update_done(void);

#else	

#define cpu_notifier(fn, pri)	do { (void)(fn); } while (0)

static inline int register_cpu_notifier(struct notifier_block *nb)
{
	return 0;
}

static inline void unregister_cpu_notifier(struct notifier_block *nb)
{
}

static inline void cpu_maps_update_begin(void)
{
}

static inline void cpu_maps_update_done(void)
{
}

#endif 
extern struct bus_type cpu_subsys;

#ifdef CONFIG_HOTPLUG_CPU

extern void get_online_cpus(void);
extern void put_online_cpus(void);
#define hotcpu_notifier(fn, pri)	cpu_notifier(fn, pri)
#define register_hotcpu_notifier(nb)	register_cpu_notifier(nb)
#define unregister_hotcpu_notifier(nb)	unregister_cpu_notifier(nb)
int cpu_down(unsigned int cpu);

#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
extern void cpu_hotplug_driver_lock(void);
extern void cpu_hotplug_driver_unlock(void);
#else
static inline void cpu_hotplug_driver_lock(void)
{
}

static inline void cpu_hotplug_driver_unlock(void)
{
}
#endif

#else		

#define get_online_cpus()	do { } while (0)
#define put_online_cpus()	do { } while (0)
#define hotcpu_notifier(fn, pri)	do { (void)(fn); } while (0)
#define register_hotcpu_notifier(nb)	({ (void)(nb); 0; })
#define unregister_hotcpu_notifier(nb)	({ (void)(nb); })
#endif		

#ifdef CONFIG_PM_SLEEP_SMP
extern int disable_nonboot_cpus(void);
extern void enable_nonboot_cpus(void);
#else 
static inline int disable_nonboot_cpus(void) { return 0; }
static inline void enable_nonboot_cpus(void) {}
#endif 

#define IDLE_START 1
#define IDLE_END 2

void idle_notifier_register(struct notifier_block *n);
void idle_notifier_unregister(struct notifier_block *n);
void idle_notifier_call_chain(unsigned long val);

#endif