#ifndef _LINUX_SWSUSP_H #define _LINUX_SWSUSP_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> /* 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); #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 /** * struct 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. * * @prepare: prepare system for hibernation * @enter: shut down system after state has been saved to disk * @finish: finish/clean up after state has been reloaded * @pre_restore: prepare system for the restoration from a hibernation image * @restore_cleanup: clean up after a failing image restoration */ struct hibernation_ops { int (*prepare)(void); int (*enter)(void); void (*finish)(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 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 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); struct saved_context; void __save_processor_state(struct saved_context *ctxt); void __restore_processor_state(struct saved_context *ctxt); /* 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_SWSUSP_H */