include/linux/suspend.h

   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 */