Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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/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 */