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
47 struct hibernation_ops {
53 #if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
54 /* kernel/power/snapshot.c */
55 extern void __init register_nosave_region(unsigned long, unsigned long);
56 extern int swsusp_page_is_forbidden(struct page *);
57 extern void swsusp_set_page_free(struct page *);
58 extern void swsusp_unset_page_free(struct page *);
59 extern unsigned long get_safe_page(gfp_t gfp_mask);
61 extern void hibernation_set_ops(struct hibernation_ops *ops);
62 extern int hibernate(void);
64 static inline void register_nosave_region(unsigned long b, unsigned long e) {}
65 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
66 static inline void swsusp_set_page_free(struct page *p) {}
67 static inline void swsusp_unset_page_free(struct page *p) {}
69 static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
70 static inline int hibernate(void) { return -ENOSYS; }
71 #endif /* defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND) */
73 void save_processor_state(void);
74 void restore_processor_state(void);
76 void __save_processor_state(struct saved_context *ctxt);
77 void __restore_processor_state(struct saved_context *ctxt);
79 #endif /* _LINUX_SWSUSP_H */