Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_SWSUSP_H |
| 2 | #define _LINUX_SWSUSP_H |
| 3 | |
| 4 | #if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) |
| 5 | #include <asm/suspend.h> |
| 6 | #endif |
| 7 | #include <linux/swap.h> |
| 8 | #include <linux/notifier.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/init.h> |
| 10 | #include <linux/pm.h> |
Rafael J. Wysocki | 7be9823 | 2007-05-06 14:50:42 -0700 | [diff] [blame^] | 11 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
Rafael J. Wysocki | 8357376 | 2006-12-06 20:34:18 -0800 | [diff] [blame] | 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 | */ |
Rafael J. Wysocki | dcbb5a5 | 2006-09-25 23:32:51 -0700 | [diff] [blame] | 17 | struct pbe { |
Rafael J. Wysocki | 8357376 | 2006-12-06 20:34:18 -0800 | [diff] [blame] | 18 | void *address; /* address of the copy */ |
| 19 | void *orig_address; /* original address of a page */ |
Rafael J. Wysocki | 7088a5c | 2006-01-06 00:13:05 -0800 | [diff] [blame] | 20 | struct pbe *next; |
Rafael J. Wysocki | dcbb5a5 | 2006-09-25 23:32:51 -0700 | [diff] [blame] | 21 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | /* mm/page_alloc.c */ |
| 24 | extern void drain_local_pages(void); |
| 25 | extern void mark_free_pages(struct zone *zone); |
| 26 | |
| 27 | #ifdef CONFIG_PM |
| 28 | /* kernel/power/swsusp.c */ |
| 29 | extern int software_suspend(void); |
Rafael J. Wysocki | 46cd2f3 | 2006-02-07 12:58:50 -0800 | [diff] [blame] | 30 | |
| 31 | #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) |
| 32 | extern int pm_prepare_console(void); |
| 33 | extern void pm_restore_console(void); |
| 34 | #else |
| 35 | static inline int pm_prepare_console(void) { return 0; } |
| 36 | static inline void pm_restore_console(void) {} |
| 37 | #endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #else |
| 39 | static inline int software_suspend(void) |
| 40 | { |
| 41 | printk("Warning: fake suspend called\n"); |
Rafael J. Wysocki | dcbb5a5 | 2006-09-25 23:32:51 -0700 | [diff] [blame] | 42 | return -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | } |
Rafael J. Wysocki | 46cd2f3 | 2006-02-07 12:58:50 -0800 | [diff] [blame] | 44 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | void save_processor_state(void); |
| 47 | void restore_processor_state(void); |
| 48 | struct saved_context; |
| 49 | void __save_processor_state(struct saved_context *ctxt); |
| 50 | void __restore_processor_state(struct saved_context *ctxt); |
Rafael J. Wysocki | 2c1b4a5 | 2005-10-30 14:59:58 -0800 | [diff] [blame] | 51 | unsigned long get_safe_page(gfp_t gfp_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Rafael J. Wysocki | 7be9823 | 2007-05-06 14:50:42 -0700 | [diff] [blame^] | 53 | /* Page management functions for the software suspend (swsusp) */ |
| 54 | |
| 55 | static inline void swsusp_set_page_forbidden(struct page *page) |
| 56 | { |
| 57 | SetPageNosave(page); |
| 58 | } |
| 59 | |
| 60 | static inline int swsusp_page_is_forbidden(struct page *page) |
| 61 | { |
| 62 | return PageNosave(page); |
| 63 | } |
| 64 | |
| 65 | static inline void swsusp_unset_page_forbidden(struct page *page) |
| 66 | { |
| 67 | ClearPageNosave(page); |
| 68 | } |
| 69 | |
| 70 | static inline void swsusp_set_page_free(struct page *page) |
| 71 | { |
| 72 | SetPageNosaveFree(page); |
| 73 | } |
| 74 | |
| 75 | static inline int swsusp_page_is_free(struct page *page) |
| 76 | { |
| 77 | return PageNosaveFree(page); |
| 78 | } |
| 79 | |
| 80 | static inline void swsusp_unset_page_free(struct page *page) |
| 81 | { |
| 82 | ClearPageNosaveFree(page); |
| 83 | } |
| 84 | |
Rafael J. Wysocki | 25761b6 | 2005-10-30 14:59:56 -0800 | [diff] [blame] | 85 | /* |
| 86 | * XXX: We try to keep some more pages free so that I/O operations succeed |
| 87 | * without paging. Might this be more? |
| 88 | */ |
Rafael J. Wysocki | 72a97e0 | 2006-01-06 00:13:46 -0800 | [diff] [blame] | 89 | #define PAGES_FOR_IO 1024 |
Rafael J. Wysocki | 25761b6 | 2005-10-30 14:59:56 -0800 | [diff] [blame] | 90 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | #endif /* _LINUX_SWSUSP_H */ |