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/
usr/
src/
linux-headers-3.0.0-14-generic-pae/
include/
linux/
- drwxr-xr-x
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Viewing file: cpu.h (4.92 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/* * include/linux/cpu.h - generic cpu definition * * This is mainly for topological representation. We define the * basic 'struct cpu' here, which can be embedded in per-arch * definitions of processors. * * Basic handling of the devices is done in drivers/base/cpu.c * and system devices are handled in drivers/base/sys.c. * * CPUs are exported via sysfs in the class/cpu/devices/ * directory. */ #ifndef _LINUX_CPU_H_ #define _LINUX_CPU_H_
#include <linux/sysdev.h> #include <linux/node.h> #include <linux/compiler.h> #include <linux/cpumask.h>
struct cpu { int node_id; /* The node which contains the CPU */ int hotpluggable; /* creates sysfs control file if hotpluggable */ struct sys_device sysdev; };
extern int register_cpu(struct cpu *cpu, int num); extern struct sys_device *get_cpu_sysdev(unsigned cpu);
extern int cpu_add_sysdev_attr(struct sysdev_attribute *attr); extern void cpu_remove_sysdev_attr(struct sysdev_attribute *attr);
extern int cpu_add_sysdev_attr_group(struct attribute_group *attrs); extern void cpu_remove_sysdev_attr_group(struct attribute_group *attrs);
extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls);
#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;
/* * CPU notifier priorities. */ enum { /* * SCHED_ACTIVE marks a cpu which is coming up active during * CPU_ONLINE and CPU_DOWN_FAILED and must be the first * notifier. CPUSET_ACTIVE adjusts cpuset according to * cpu_active mask right after SCHED_ACTIVE. During * CPU_DOWN_PREPARE, SCHED_INACTIVE and CPUSET_INACTIVE are * ordered in the similar way. * * This ordering guarantees consistent cpu_active mask and * migration behavior to all cpu notifiers. */ 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,
/* migration should happen before other stuff but after perf */ CPU_PRI_PERF = 20, CPU_PRI_MIGRATION = 10, /* prepare workqueues for other notifiers */ CPU_PRI_WORKQUEUE = 5, };
#ifdef CONFIG_SMP /* Need to know about CPUs going up/down? */ #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 /* #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */ #define cpu_notifier(fn, pri) do { (void)(fn); } while (0) #endif /* #else #if defined(CONFIG_HOTPLUG_CPU) || !defined(MODULE) */ #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 /* CONFIG_SMP */
#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 /* CONFIG_SMP */ extern struct sysdev_class cpu_sysdev_class;
#ifdef CONFIG_HOTPLUG_CPU /* Stop CPUs going up and down. */
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 /* CONFIG_HOTPLUG_CPU */
#define get_online_cpus() do { } while (0) #define put_online_cpus() do { } while (0) #define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0) /* These aren't inline functions due to a GCC bug. */ #define register_hotcpu_notifier(nb) ({ (void)(nb); 0; }) #define unregister_hotcpu_notifier(nb) ({ (void)(nb); }) #endif /* CONFIG_HOTPLUG_CPU */
#ifdef CONFIG_PM_SLEEP_SMP extern int suspend_cpu_hotplug;
extern int disable_nonboot_cpus(void); extern void enable_nonboot_cpus(void); #else /* !CONFIG_PM_SLEEP_SMP */ #define suspend_cpu_hotplug 0
static inline int disable_nonboot_cpus(void) { return 0; } static inline void enable_nonboot_cpus(void) {} #endif /* !CONFIG_PM_SLEEP_SMP */
#endif /* _LINUX_CPU_H_ */
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