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> 9 #include <linux/init.h> 10 #include <linux/pm.h> 11 12 /* page backup entry */ 13 typedef struct pbe { 14 unsigned long address; /* address of the copy */ 15 unsigned long orig_address; /* original address of page */ 16 struct pbe *next; 17 } suspend_pagedir_t; 18 19 #define for_each_pbe(pbe, pblist) \ 20 for (pbe = pblist ; pbe ; pbe = pbe->next) 21 22 #define PBES_PER_PAGE (PAGE_SIZE/sizeof(struct pbe)) 23 #define PB_PAGE_SKIP (PBES_PER_PAGE-1) 24 25 #define for_each_pb_page(pbe, pblist) \ 26 for (pbe = pblist ; pbe ; pbe = (pbe+PB_PAGE_SKIP)->next) 27 28 29 #define SWAP_FILENAME_MAXLENGTH 32 30 31 32 extern dev_t swsusp_resume_device; 33 34 /* mm/vmscan.c */ 35 extern int shrink_mem(void); 36 37 /* mm/page_alloc.c */ 38 extern void drain_local_pages(void); 39 extern void mark_free_pages(struct zone *zone); 40 41 #ifdef CONFIG_PM 42 /* kernel/power/swsusp.c */ 43 extern int software_suspend(void); 44 45 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) 46 extern int pm_prepare_console(void); 47 extern void pm_restore_console(void); 48 #else 49 static inline int pm_prepare_console(void) { return 0; } 50 static inline void pm_restore_console(void) {} 51 #endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */ 52 #else 53 static inline int software_suspend(void) 54 { 55 printk("Warning: fake suspend called\n"); 56 return -EPERM; 57 } 58 #endif /* CONFIG_PM */ 59 60 #ifdef CONFIG_SUSPEND_SMP 61 extern void disable_nonboot_cpus(void); 62 extern void enable_nonboot_cpus(void); 63 #else 64 static inline void disable_nonboot_cpus(void) {} 65 static inline void enable_nonboot_cpus(void) {} 66 #endif 67 68 void save_processor_state(void); 69 void restore_processor_state(void); 70 struct saved_context; 71 void __save_processor_state(struct saved_context *ctxt); 72 void __restore_processor_state(struct saved_context *ctxt); 73 unsigned long get_safe_page(gfp_t gfp_mask); 74 75 /* 76 * XXX: We try to keep some more pages free so that I/O operations succeed 77 * without paging. Might this be more? 78 */ 79 #define PAGES_FOR_IO 1024 80 81 #endif /* _LINUX_SWSUSP_H */ 82