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/config.h> 10 #include <linux/init.h> 11 #include <linux/pm.h> 12 13 /* page backup entry */ 14 typedef struct pbe { 15 unsigned long address; /* address of the copy */ 16 unsigned long orig_address; /* original address of page */ 17 struct pbe *next; 18 } suspend_pagedir_t; 19 20 #define for_each_pbe(pbe, pblist) \ 21 for (pbe = pblist ; pbe ; pbe = pbe->next) 22 23 #define PBES_PER_PAGE (PAGE_SIZE/sizeof(struct pbe)) 24 #define PB_PAGE_SKIP (PBES_PER_PAGE-1) 25 26 #define for_each_pb_page(pbe, pblist) \ 27 for (pbe = pblist ; pbe ; pbe = (pbe+PB_PAGE_SKIP)->next) 28 29 30 #define SWAP_FILENAME_MAXLENGTH 32 31 32 33 extern dev_t swsusp_resume_device; 34 35 /* mm/vmscan.c */ 36 extern int shrink_mem(void); 37 38 /* mm/page_alloc.c */ 39 extern void drain_local_pages(void); 40 extern void mark_free_pages(struct zone *zone); 41 42 #ifdef CONFIG_PM 43 /* kernel/power/swsusp.c */ 44 extern int software_suspend(void); 45 46 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) 47 extern int pm_prepare_console(void); 48 extern void pm_restore_console(void); 49 #else 50 static inline int pm_prepare_console(void) { return 0; } 51 static inline void pm_restore_console(void) {} 52 #endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */ 53 #else 54 static inline int software_suspend(void) 55 { 56 printk("Warning: fake suspend called\n"); 57 return -EPERM; 58 } 59 #endif /* CONFIG_PM */ 60 61 #ifdef CONFIG_SUSPEND_SMP 62 extern void disable_nonboot_cpus(void); 63 extern void enable_nonboot_cpus(void); 64 #else 65 static inline void disable_nonboot_cpus(void) {} 66 static inline void enable_nonboot_cpus(void) {} 67 #endif 68 69 void save_processor_state(void); 70 void restore_processor_state(void); 71 struct saved_context; 72 void __save_processor_state(struct saved_context *ctxt); 73 void __restore_processor_state(struct saved_context *ctxt); 74 unsigned long get_safe_page(gfp_t gfp_mask); 75 76 /* 77 * XXX: We try to keep some more pages free so that I/O operations succeed 78 * without paging. Might this be more? 79 */ 80 #define PAGES_FOR_IO 1024 81 82 #endif /* _LINUX_SWSUSP_H */ 83