Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 */
14typedef 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
33extern dev_t swsusp_resume_device;
34
35/* mm/vmscan.c */
36extern int shrink_mem(void);
37
38/* mm/page_alloc.c */
39extern void drain_local_pages(void);
40extern void mark_free_pages(struct zone *zone);
41
42#ifdef CONFIG_PM
43/* kernel/power/swsusp.c */
44extern int software_suspend(void);
45
46#if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
47extern int pm_prepare_console(void);
48extern void pm_restore_console(void);
49#else
50static inline int pm_prepare_console(void) { return 0; }
51static inline void pm_restore_console(void) {}
52#endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */
53#else
54static 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
62extern void disable_nonboot_cpus(void);
63extern void enable_nonboot_cpus(void);
64#else
65static inline void disable_nonboot_cpus(void) {}
66static inline void enable_nonboot_cpus(void) {}
67#endif
68
69void save_processor_state(void);
70void restore_processor_state(void);
71struct saved_context;
72void __save_processor_state(struct saved_context *ctxt);
73void __restore_processor_state(struct saved_context *ctxt);
74unsigned 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 */