LXR linux-bk/include/linux/suspend.h

   1#ifndef _LINUX_SWSUSP_H
   2#define _LINUX_SWSUSP_H
   3
   4#ifdef CONFIG_X86
   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#ifdef CONFIG_PM
  14/* page backup entry */
  15typedef struct pbe {
  16        unsigned long address;          /* address of the copy */
  17        unsigned long orig_address;     /* original address of page */
  18        swp_entry_t swap_address;       
  19        swp_entry_t dummy;              /* we need scratch space at 
  20                                         * end of page (see link, diskpage)
  21                                         */
  22} suspend_pagedir_t;
  23
  24#define SWAP_FILENAME_MAXLENGTH 32
  25
  26struct suspend_header {
  27        u32 version_code;
  28        unsigned long num_physpages;
  29        char machine[8];
  30        char version[20];
  31        int num_cpus;
  32        int page_size;
  33        suspend_pagedir_t *suspend_pagedir;
  34        unsigned int num_pbes;
  35};
  36
  37#define SUSPEND_PD_PAGES(x)     (((x)*sizeof(struct pbe))/PAGE_SIZE+1)
  38   
  39/* mm/vmscan.c */
  40extern int shrink_mem(void);
  41
  42/* mm/page_alloc.c */
  43extern void drain_local_pages(void);
  44
  45/* kernel/power/swsusp.c */
  46extern int software_suspend(void);
  47
  48extern unsigned int nr_copy_pages __nosavedata;
  49extern suspend_pagedir_t *pagedir_nosave __nosavedata;
  50
  51#else   /* CONFIG_SOFTWARE_SUSPEND */
  52static inline int software_suspend(void)
  53{
  54        printk("Warning: fake suspend called\n");
  55        return -EPERM;
  56}
  57#define software_resume()               do { } while(0)
  58#endif  /* CONFIG_SOFTWARE_SUSPEND */
  59
  60
  61#ifdef CONFIG_PM
  62extern void refrigerator(unsigned long);
  63extern int freeze_processes(void);
  64extern void thaw_processes(void);
  65
  66extern int pm_prepare_console(void);
  67extern void pm_restore_console(void);
  68
  69#else
  70static inline void refrigerator(unsigned long flag) {}
  71#endif  /* CONFIG_PM */
  72
  73#ifdef CONFIG_SMP
  74extern void disable_nonboot_cpus(void);
  75extern void enable_nonboot_cpus(void);
  76#else
  77static inline void disable_nonboot_cpus(void) {}
  78static inline void enable_nonboot_cpus(void) {}
  79#endif
  80
  81asmlinkage void do_magic(int is_resume);
  82asmlinkage void do_magic_resume_1(void);
  83asmlinkage void do_magic_resume_2(void);
  84asmlinkage void do_magic_suspend_1(void);
  85asmlinkage void do_magic_suspend_2(void);
  86
  87void save_processor_state(void);
  88void restore_processor_state(void);
  89struct saved_context;
  90void __save_processor_state(struct saved_context *ctxt);
  91void __restore_processor_state(struct saved_context *ctxt);
  92
  93#endif /* _LINUX_SWSUSP_H */
  94