Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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 */
17struct 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 */
24extern void drain_local_pages(void);
25extern void mark_free_pages(struct zone *zone);
26
27#if defined(CONFIG_PM) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
28extern int pm_prepare_console(void);
29extern void pm_restore_console(void);
30#else
31static inline int pm_prepare_console(void) { return 0; }
32static 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 */
47struct hibernation_ops {
48 int (*prepare)(void);
49 int (*enter)(void);
50 void (*finish)(void);
51};
52
53#if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
54/* kernel/power/snapshot.c */
55extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
56static inline void register_nosave_region(unsigned long b, unsigned long e)
57{
58 __register_nosave_region(b, e, 0);
59}
60static inline void register_nosave_region_late(unsigned long b, unsigned long e)
61{
62 __register_nosave_region(b, e, 1);
63}
64extern int swsusp_page_is_forbidden(struct page *);
65extern void swsusp_set_page_free(struct page *);
66extern void swsusp_unset_page_free(struct page *);
67extern unsigned long get_safe_page(gfp_t gfp_mask);
68
69extern void hibernation_set_ops(struct hibernation_ops *ops);
70extern int hibernate(void);
71#else
72static inline void register_nosave_region(unsigned long b, unsigned long e) {}
73static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
74static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
75static inline void swsusp_set_page_free(struct page *p) {}
76static inline void swsusp_unset_page_free(struct page *p) {}
77
78static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
79static inline int hibernate(void) { return -ENOSYS; }
80#endif /* defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND) */
81
82void save_processor_state(void);
83void restore_processor_state(void);
84struct saved_context;
85void __save_processor_state(struct saved_context *ctxt);
86void __restore_processor_state(struct saved_context *ctxt);
87
88#endif /* _LINUX_SWSUSP_H */