1 #ifndef _LINUX_SWSUSP_H
2 #define _LINUX_SWSUSP_H
4 #if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64)
5 #include <asm/suspend.h>
7 #include <linux/swap.h>
8 #include <linux/notifier.h>
9 #include <linux/init.h>
13 /* struct pbe is used for creating lists of pages that should be restored
14 * atomically during the resume from disk, because the page frames they have
15 * occupied before the suspend are in use.
18 void *address; /* address of the copy */
19 void *orig_address; /* original address of a page */
24 extern void drain_local_pages(void);
25 extern void mark_free_pages(struct zone *zone);
27 #if defined(CONFIG_PM) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
28 extern int pm_prepare_console(void);
29 extern void pm_restore_console(void);
31 static inline int pm_prepare_console(void) { return 0; }
32 static inline void pm_restore_console(void) {}
36 * struct hibernation_ops - hibernation platform support
38 * The methods in this structure allow a platform to override the default
39 * mechanism of shutting down the machine during a hibernation transition.
41 * All three methods must be assigned.
43 * @prepare: prepare system for hibernation
44 * @enter: shut down system after state has been saved to disk
45 * @finish: finish/clean up after state has been reloaded
46 * @pre_restore: prepare system for the restoration from a hibernation image
47 * @restore_cleanup: clean up after a failing image restoration
49 struct hibernation_ops {
53 int (*pre_restore)(void);
54 void (*restore_cleanup)(void);
58 #ifdef CONFIG_SOFTWARE_SUSPEND
59 /* kernel/power/snapshot.c */
60 extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
61 static inline void register_nosave_region(unsigned long b, unsigned long e)
63 __register_nosave_region(b, e, 0);
65 static inline void register_nosave_region_late(unsigned long b, unsigned long e)
67 __register_nosave_region(b, e, 1);
69 extern int swsusp_page_is_forbidden(struct page *);
70 extern void swsusp_set_page_free(struct page *);
71 extern void swsusp_unset_page_free(struct page *);
72 extern unsigned long get_safe_page(gfp_t gfp_mask);
74 extern void hibernation_set_ops(struct hibernation_ops *ops);
75 extern int hibernate(void);
76 #else /* CONFIG_SOFTWARE_SUSPEND */
77 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
78 static inline void swsusp_set_page_free(struct page *p) {}
79 static inline void swsusp_unset_page_free(struct page *p) {}
81 static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
82 static inline int hibernate(void) { return -ENOSYS; }
83 #endif /* CONFIG_SOFTWARE_SUSPEND */
85 void save_processor_state(void);
86 void restore_processor_state(void);
88 void __save_processor_state(struct saved_context *ctxt);
89 void __restore_processor_state(struct saved_context *ctxt);
91 /* kernel/power/main.c */
92 extern struct blocking_notifier_head pm_chain_head;
94 static inline int register_pm_notifier(struct notifier_block *nb)
96 return blocking_notifier_chain_register(&pm_chain_head, nb);
99 static inline int unregister_pm_notifier(struct notifier_block *nb)
101 return blocking_notifier_chain_unregister(&pm_chain_head, nb);
104 #define pm_notifier(fn, pri) { \
105 static struct notifier_block fn##_nb = \
106 { .notifier_call = fn, .priority = pri }; \
107 register_pm_notifier(&fn##_nb); \
109 #else /* CONFIG_PM */
111 static inline int register_pm_notifier(struct notifier_block *nb)
116 static inline int unregister_pm_notifier(struct notifier_block *nb)
121 #define pm_notifier(fn, pri) do { (void)(fn); } while (0)
122 #endif /* CONFIG_PM */
124 #if !defined CONFIG_SOFTWARE_SUSPEND || !defined(CONFIG_PM)
125 static inline void register_nosave_region(unsigned long b, unsigned long e)
130 #endif /* _LINUX_SWSUSP_H */