LXR linux/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/init.h>
  10#include <linux/pm.h>
  11
  12/* page backup entry */
  13typedef 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
  32extern dev_t swsusp_resume_device;
  33   
  34/* mm/vmscan.c */
  35extern int shrink_mem(void);
  36
  37/* mm/page_alloc.c */
  38extern void drain_local_pages(void);
  39extern void mark_free_pages(struct zone *zone);
  40
  41#ifdef CONFIG_PM
  42/* kernel/power/swsusp.c */
  43extern int software_suspend(void);
  44
  45#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
  46extern int pm_prepare_console(void);
  47extern void pm_restore_console(void);
  48#else
  49static inline int pm_prepare_console(void) { return 0; }
  50static inline void pm_restore_console(void) {}
  51#endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */
  52#else
  53static 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
  61extern void disable_nonboot_cpus(void);
  62extern void enable_nonboot_cpus(void);
  63#else
  64static inline void disable_nonboot_cpus(void) {}
  65static inline void enable_nonboot_cpus(void) {}
  66#endif
  67
  68void save_processor_state(void);
  69void restore_processor_state(void);
  70struct saved_context;
  71void __save_processor_state(struct saved_context *ctxt);
  72void __restore_processor_state(struct saved_context *ctxt);
  73unsigned 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