xref: /openbmc/linux/kernel/power/power.h (revision 87c2ce3b)
1 #include <linux/suspend.h>
2 #include <linux/utsname.h>
3 
4 /* With SUSPEND_CONSOLE defined suspend looks *really* cool, but
5    we probably do not take enough locks for switching consoles, etc,
6    so bad things might happen.
7 */
8 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
9 #define SUSPEND_CONSOLE	(MAX_NR_CONSOLES-1)
10 #endif
11 
12 struct swsusp_info {
13 	struct new_utsname	uts;
14 	u32			version_code;
15 	unsigned long		num_physpages;
16 	int			cpus;
17 	unsigned long		image_pages;
18 	unsigned long		pages;
19 } __attribute__((aligned(PAGE_SIZE)));
20 
21 
22 
23 #ifdef CONFIG_SOFTWARE_SUSPEND
24 extern int pm_suspend_disk(void);
25 
26 #else
27 static inline int pm_suspend_disk(void)
28 {
29 	return -EPERM;
30 }
31 #endif
32 extern struct semaphore pm_sem;
33 #define power_attr(_name) \
34 static struct subsys_attribute _name##_attr = {	\
35 	.attr	= {				\
36 		.name = __stringify(_name),	\
37 		.mode = 0644,			\
38 	},					\
39 	.show	= _name##_show,			\
40 	.store	= _name##_store,		\
41 }
42 
43 extern struct subsystem power_subsys;
44 
45 extern int pm_prepare_console(void);
46 extern void pm_restore_console(void);
47 
48 /* References to section boundaries */
49 extern const void __nosave_begin, __nosave_end;
50 
51 extern unsigned int nr_copy_pages;
52 extern struct pbe *pagedir_nosave;
53 
54 /* Preferred image size in MB (default 500) */
55 extern unsigned int image_size;
56 
57 extern asmlinkage int swsusp_arch_suspend(void);
58 extern asmlinkage int swsusp_arch_resume(void);
59 
60 extern unsigned int count_data_pages(void);
61 extern void free_pagedir(struct pbe *pblist);
62 extern void release_eaten_pages(void);
63 extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
64 extern void swsusp_free(void);
65 extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
66 extern unsigned int snapshot_nr_pages(void);
67 extern struct pbe *snapshot_pblist(void);
68 extern void snapshot_pblist_set(struct pbe *pblist);
69