1 #ifndef _LINUX_SWSUSP_H 2 #define _LINUX_SWSUSP_H 3 4 #if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) 5 #include <asm/suspend.h> 6 #endif 7 #include <linux/swap.h> 8 #include <linux/notifier.h> 9 #include <linux/init.h> 10 #include <linux/pm.h> 11 #include <linux/mm.h> 12 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. 16 */ 17 struct pbe { 18 void *address; /* address of the copy */ 19 void *orig_address; /* original address of a page */ 20 struct pbe *next; 21 }; 22 23 /* mm/page_alloc.c */ 24 extern void drain_local_pages(void); 25 extern void mark_free_pages(struct zone *zone); 26 27 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) 28 extern int pm_prepare_console(void); 29 extern void pm_restore_console(void); 30 #else 31 static inline int pm_prepare_console(void) { return 0; } 32 static inline void pm_restore_console(void) {} 33 #endif 34 35 /** 36 * struct hibernation_ops - hibernation platform support 37 * 38 * The methods in this structure allow a platform to override the default 39 * mechanism of shutting down the machine during a hibernation transition. 40 * 41 * All three methods must be assigned. 42 * 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 48 */ 49 struct hibernation_ops { 50 int (*prepare)(void); 51 int (*enter)(void); 52 void (*finish)(void); 53 int (*pre_restore)(void); 54 void (*restore_cleanup)(void); 55 }; 56 57 #ifdef CONFIG_HIBERNATION 58 /* kernel/power/snapshot.c */ 59 extern void __register_nosave_region(unsigned long b, unsigned long e, int km); 60 static inline void register_nosave_region(unsigned long b, unsigned long e) 61 { 62 __register_nosave_region(b, e, 0); 63 } 64 static inline void register_nosave_region_late(unsigned long b, unsigned long e) 65 { 66 __register_nosave_region(b, e, 1); 67 } 68 extern int swsusp_page_is_forbidden(struct page *); 69 extern void swsusp_set_page_free(struct page *); 70 extern void swsusp_unset_page_free(struct page *); 71 extern unsigned long get_safe_page(gfp_t gfp_mask); 72 73 extern void hibernation_set_ops(struct hibernation_ops *ops); 74 extern int hibernate(void); 75 #else /* CONFIG_HIBERNATION */ 76 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 77 static inline void swsusp_set_page_free(struct page *p) {} 78 static inline void swsusp_unset_page_free(struct page *p) {} 79 80 static inline void hibernation_set_ops(struct hibernation_ops *ops) {} 81 static inline int hibernate(void) { return -ENOSYS; } 82 #endif /* CONFIG_HIBERNATION */ 83 84 #ifdef CONFIG_PM_SLEEP 85 void save_processor_state(void); 86 void restore_processor_state(void); 87 struct saved_context; 88 void __save_processor_state(struct saved_context *ctxt); 89 void __restore_processor_state(struct saved_context *ctxt); 90 91 /* kernel/power/main.c */ 92 extern struct blocking_notifier_head pm_chain_head; 93 94 static inline int register_pm_notifier(struct notifier_block *nb) 95 { 96 return blocking_notifier_chain_register(&pm_chain_head, nb); 97 } 98 99 static inline int unregister_pm_notifier(struct notifier_block *nb) 100 { 101 return blocking_notifier_chain_unregister(&pm_chain_head, nb); 102 } 103 104 #define pm_notifier(fn, pri) { \ 105 static struct notifier_block fn##_nb = \ 106 { .notifier_call = fn, .priority = pri }; \ 107 register_pm_notifier(&fn##_nb); \ 108 } 109 #else /* !CONFIG_PM_SLEEP */ 110 111 static inline int register_pm_notifier(struct notifier_block *nb) 112 { 113 return 0; 114 } 115 116 static inline int unregister_pm_notifier(struct notifier_block *nb) 117 { 118 return 0; 119 } 120 121 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 122 #endif /* !CONFIG_PM_SLEEP */ 123 124 #ifndef CONFIG_HIBERNATION 125 static inline void register_nosave_region(unsigned long b, unsigned long e) 126 { 127 } 128 static inline void register_nosave_region_late(unsigned long b, unsigned long e) 129 { 130 } 131 #endif 132 133 #endif /* _LINUX_SWSUSP_H */ 134