38 lines
1.4 KiB
Plaintext
Executable file
38 lines
1.4 KiB
Plaintext
Executable file
|
|
|
|
Supporting multiple CPU idle levels in kernel
|
|
|
|
cpuidle drivers
|
|
|
|
|
|
|
|
|
|
cpuidle driver hooks into the cpuidle infrastructure and handles the
|
|
architecture/platform dependent part of CPU idle states. Driver
|
|
provides the platform idle state detection capability and also
|
|
has mechanisms in place to support actual entry-exit into CPU idle states.
|
|
|
|
cpuidle driver initializes the cpuidle_device structure for each CPU device
|
|
and registers with cpuidle using cpuidle_register_device.
|
|
|
|
If all the idle states are the same, the wrapper function cpuidle_register
|
|
could be used instead.
|
|
|
|
It can also support the dynamic changes (like battery <-> AC), by using
|
|
cpuidle_pause_and_lock, cpuidle_disable_device and cpuidle_enable_device,
|
|
cpuidle_resume_and_unlock.
|
|
|
|
Interfaces:
|
|
extern int cpuidle_register(struct cpuidle_driver *drv,
|
|
const struct cpumask *const coupled_cpus);
|
|
extern int cpuidle_unregister(struct cpuidle_driver *drv);
|
|
extern int cpuidle_register_driver(struct cpuidle_driver *drv);
|
|
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 void cpuidle_pause_and_lock(void);
|
|
extern void cpuidle_resume_and_unlock(void);
|
|
extern int cpuidle_enable_device(struct cpuidle_device *dev);
|
|
extern void cpuidle_disable_device(struct cpuidle_device *dev);
|