xref: /openbmc/linux/kernel/power/power.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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 #define MAX_PBES	((PAGE_SIZE - sizeof(struct new_utsname) \
13 			- 4 - 3*sizeof(unsigned long) - sizeof(int) \
14 			- sizeof(void *)) / sizeof(swp_entry_t))
15 
16 struct swsusp_info {
17 	struct new_utsname	uts;
18 	u32			version_code;
19 	unsigned long		num_physpages;
20 	int			cpus;
21 	unsigned long		image_pages;
22 	unsigned long		pagedir_pages;
23 	suspend_pagedir_t	* suspend_pagedir;
24 	swp_entry_t		pagedir[MAX_PBES];
25 } __attribute__((aligned(PAGE_SIZE)));
26 
27 
28 
29 #ifdef CONFIG_SOFTWARE_SUSPEND
30 extern int pm_suspend_disk(void);
31 
32 #else
33 static inline int pm_suspend_disk(void)
34 {
35 	return -EPERM;
36 }
37 #endif
38 extern struct semaphore pm_sem;
39 #define power_attr(_name) \
40 static struct subsys_attribute _name##_attr = {	\
41 	.attr	= {				\
42 		.name = __stringify(_name),	\
43 		.mode = 0644,			\
44 	},					\
45 	.show	= _name##_show,			\
46 	.store	= _name##_store,		\
47 }
48 
49 extern struct subsystem power_subsys;
50 
51 extern int freeze_processes(void);
52 extern void thaw_processes(void);
53 
54 extern int pm_prepare_console(void);
55 extern void pm_restore_console(void);
56 
57 
58 /* References to section boundaries */
59 extern const void __nosave_begin, __nosave_end;
60 
61 extern unsigned int nr_copy_pages;
62 extern suspend_pagedir_t *pagedir_nosave;
63 extern suspend_pagedir_t *pagedir_save;
64 
65 extern asmlinkage int swsusp_arch_suspend(void);
66 extern asmlinkage int swsusp_arch_resume(void);
67 
68 extern int restore_highmem(void);
69 extern struct pbe * alloc_pagedir(unsigned nr_pages);
70 extern void create_pbe_list(struct pbe *pblist, unsigned nr_pages);
71 extern void swsusp_free(void);
72 extern int enough_swap(unsigned nr_pages);
73