258 строки
9.2 KiB
C
258 строки
9.2 KiB
C
#ifndef _LINUX_SUSPEND_H
|
|
#define _LINUX_SUSPEND_H
|
|
|
|
#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
|
|
#include <asm/suspend.h>
|
|
#endif
|
|
#include <linux/swap.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/errno.h>
|
|
|
|
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
|
|
extern int pm_prepare_console(void);
|
|
extern void pm_restore_console(void);
|
|
#else
|
|
static inline int pm_prepare_console(void) { return 0; }
|
|
static inline void pm_restore_console(void) {}
|
|
#endif
|
|
|
|
typedef int __bitwise suspend_state_t;
|
|
|
|
#define PM_SUSPEND_ON ((__force suspend_state_t) 0)
|
|
#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1)
|
|
#define PM_SUSPEND_MEM ((__force suspend_state_t) 3)
|
|
#define PM_SUSPEND_MAX ((__force suspend_state_t) 4)
|
|
|
|
/**
|
|
* struct platform_suspend_ops - Callbacks for managing platform dependent
|
|
* system sleep states.
|
|
*
|
|
* @valid: Callback to determine if given system sleep state is supported by
|
|
* the platform.
|
|
* Valid (ie. supported) states are advertised in /sys/power/state. Note
|
|
* that it still may be impossible to enter given system sleep state if the
|
|
* conditions aren't right.
|
|
* There is the %suspend_valid_only_mem function available that can be
|
|
* assigned to this if the platform only supports mem sleep.
|
|
*
|
|
* @set_target: Tell the platform which system sleep state is going to be
|
|
* entered.
|
|
* @set_target() is executed right prior to suspending devices. The
|
|
* information conveyed to the platform code by @set_target() should be
|
|
* disregarded by the platform as soon as @finish() is executed and if
|
|
* @prepare() fails. If @set_target() fails (ie. returns nonzero),
|
|
* @prepare(), @enter() and @finish() will not be called by the PM core.
|
|
* This callback is optional. However, if it is implemented, the argument
|
|
* passed to @enter() is meaningless and should be ignored.
|
|
*
|
|
* @prepare: Prepare the platform for entering the system sleep state indicated
|
|
* by @set_target().
|
|
* @prepare() is called right after devices have been suspended (ie. the
|
|
* appropriate .suspend() method has been executed for each device) and
|
|
* before the nonboot CPUs are disabled (it is executed with IRQs enabled).
|
|
* This callback is optional. It returns 0 on success or a negative
|
|
* error code otherwise, in which case the system cannot enter the desired
|
|
* sleep state (@enter() and @finish() will not be called in that case).
|
|
*
|
|
* @enter: Enter the system sleep state indicated by @set_target() or
|
|
* represented by the argument if @set_target() is not implemented.
|
|
* This callback is mandatory. It returns 0 on success or a negative
|
|
* error code otherwise, in which case the system cannot enter the desired
|
|
* sleep state.
|
|
*
|
|
* @finish: Called when the system has just left a sleep state, right after
|
|
* the nonboot CPUs have been enabled and before devices are resumed (it is
|
|
* executed with IRQs enabled).
|
|
* This callback is optional, but should be implemented by the platforms
|
|
* that implement @prepare(). If implemented, it is always called after
|
|
* @enter() (even if @enter() fails).
|
|
*/
|
|
struct platform_suspend_ops {
|
|
int (*valid)(suspend_state_t state);
|
|
int (*set_target)(suspend_state_t state);
|
|
int (*prepare)(void);
|
|
int (*enter)(suspend_state_t state);
|
|
void (*finish)(void);
|
|
};
|
|
|
|
#ifdef CONFIG_SUSPEND
|
|
/**
|
|
* suspend_set_ops - set platform dependent suspend operations
|
|
* @ops: The new suspend operations to set.
|
|
*/
|
|
extern void suspend_set_ops(struct platform_suspend_ops *ops);
|
|
extern int suspend_valid_only_mem(suspend_state_t state);
|
|
|
|
/**
|
|
* arch_suspend_disable_irqs - disable IRQs for suspend
|
|
*
|
|
* Disables IRQs (in the default case). This is a weak symbol in the common
|
|
* code and thus allows architectures to override it if more needs to be
|
|
* done. Not called for suspend to disk.
|
|
*/
|
|
extern void arch_suspend_disable_irqs(void);
|
|
|
|
/**
|
|
* arch_suspend_enable_irqs - enable IRQs after suspend
|
|
*
|
|
* Enables IRQs (in the default case). This is a weak symbol in the common
|
|
* code and thus allows architectures to override it if more needs to be
|
|
* done. Not called for suspend to disk.
|
|
*/
|
|
extern void arch_suspend_enable_irqs(void);
|
|
|
|
extern int pm_suspend(suspend_state_t state);
|
|
#else /* !CONFIG_SUSPEND */
|
|
#define suspend_valid_only_mem NULL
|
|
|
|
static inline void suspend_set_ops(struct platform_suspend_ops *ops) {}
|
|
static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
|
|
#endif /* !CONFIG_SUSPEND */
|
|
|
|
/* struct pbe is used for creating lists of pages that should be restored
|
|
* atomically during the resume from disk, because the page frames they have
|
|
* occupied before the suspend are in use.
|
|
*/
|
|
struct pbe {
|
|
void *address; /* address of the copy */
|
|
void *orig_address; /* original address of a page */
|
|
struct pbe *next;
|
|
};
|
|
|
|
/* mm/page_alloc.c */
|
|
extern void drain_local_pages(void);
|
|
extern void mark_free_pages(struct zone *zone);
|
|
|
|
/**
|
|
* struct platform_hibernation_ops - hibernation platform support
|
|
*
|
|
* The methods in this structure allow a platform to override the default
|
|
* mechanism of shutting down the machine during a hibernation transition.
|
|
*
|
|
* All three methods must be assigned.
|
|
*
|
|
* @start: Tell the platform driver that we're starting hibernation.
|
|
* Called right after shrinking memory and before freezing devices.
|
|
*
|
|
* @pre_snapshot: Prepare the platform for creating the hibernation image.
|
|
* Called right after devices have been frozen and before the nonboot
|
|
* CPUs are disabled (runs with IRQs on).
|
|
*
|
|
* @finish: Restore the previous state of the platform after the hibernation
|
|
* image has been created *or* put the platform into the normal operation
|
|
* mode after the hibernation (the same method is executed in both cases).
|
|
* Called right after the nonboot CPUs have been enabled and before
|
|
* thawing devices (runs with IRQs on).
|
|
*
|
|
* @prepare: Prepare the platform for entering the low power state.
|
|
* Called right after the hibernation image has been saved and before
|
|
* devices are prepared for entering the low power state.
|
|
*
|
|
* @enter: Put the system into the low power state after the hibernation image
|
|
* has been saved to disk.
|
|
* Called after the nonboot CPUs have been disabled and all of the low
|
|
* level devices have been shut down (runs with IRQs off).
|
|
*
|
|
* @leave: Perform the first stage of the cleanup after the system sleep state
|
|
* indicated by @set_target() has been left.
|
|
* Called right after the control has been passed from the boot kernel to
|
|
* the image kernel, before the nonboot CPUs are enabled and before devices
|
|
* are resumed. Executed with interrupts disabled.
|
|
*
|
|
* @pre_restore: Prepare system for the restoration from a hibernation image.
|
|
* Called right after devices have been frozen and before the nonboot
|
|
* CPUs are disabled (runs with IRQs on).
|
|
*
|
|
* @restore_cleanup: Clean up after a failing image restoration.
|
|
* Called right after the nonboot CPUs have been enabled and before
|
|
* thawing devices (runs with IRQs on).
|
|
*/
|
|
struct platform_hibernation_ops {
|
|
int (*start)(void);
|
|
int (*pre_snapshot)(void);
|
|
void (*finish)(void);
|
|
int (*prepare)(void);
|
|
int (*enter)(void);
|
|
void (*leave)(void);
|
|
int (*pre_restore)(void);
|
|
void (*restore_cleanup)(void);
|
|
};
|
|
|
|
#ifdef CONFIG_HIBERNATION
|
|
/* kernel/power/snapshot.c */
|
|
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
|
|
static inline void register_nosave_region(unsigned long b, unsigned long e)
|
|
{
|
|
__register_nosave_region(b, e, 0);
|
|
}
|
|
static inline void register_nosave_region_late(unsigned long b, unsigned long e)
|
|
{
|
|
__register_nosave_region(b, e, 1);
|
|
}
|
|
extern int swsusp_page_is_forbidden(struct page *);
|
|
extern void swsusp_set_page_free(struct page *);
|
|
extern void swsusp_unset_page_free(struct page *);
|
|
extern unsigned long get_safe_page(gfp_t gfp_mask);
|
|
|
|
extern void hibernation_set_ops(struct platform_hibernation_ops *ops);
|
|
extern int hibernate(void);
|
|
#else /* CONFIG_HIBERNATION */
|
|
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
|
|
static inline void swsusp_set_page_free(struct page *p) {}
|
|
static inline void swsusp_unset_page_free(struct page *p) {}
|
|
|
|
static inline void hibernation_set_ops(struct platform_hibernation_ops *ops) {}
|
|
static inline int hibernate(void) { return -ENOSYS; }
|
|
#endif /* CONFIG_HIBERNATION */
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
void save_processor_state(void);
|
|
void restore_processor_state(void);
|
|
|
|
/* kernel/power/main.c */
|
|
extern struct blocking_notifier_head pm_chain_head;
|
|
|
|
static inline int register_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&pm_chain_head, nb);
|
|
}
|
|
|
|
static inline int unregister_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_unregister(&pm_chain_head, nb);
|
|
}
|
|
|
|
#define pm_notifier(fn, pri) { \
|
|
static struct notifier_block fn##_nb = \
|
|
{ .notifier_call = fn, .priority = pri }; \
|
|
register_pm_notifier(&fn##_nb); \
|
|
}
|
|
#else /* !CONFIG_PM_SLEEP */
|
|
|
|
static inline int register_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int unregister_pm_notifier(struct notifier_block *nb)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
|
|
#endif /* !CONFIG_PM_SLEEP */
|
|
|
|
#ifndef CONFIG_HIBERNATION
|
|
static inline void register_nosave_region(unsigned long b, unsigned long e)
|
|
{
|
|
}
|
|
static inline void register_nosave_region_late(unsigned long b, unsigned long e)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_SUSPEND_H */
|