blob: dfc1114c1b6f86f5d4b596cc9fef14336fbe332b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright 2001-2002 Pavel Machek <pavel@suse.cz>
3 * Based on code
4 * Copyright 2001 Patrick Mochel <mochel@osdl.org>
5 */
6#include <asm/desc.h>
7#include <asm/i387.h>
8
9static inline int
10arch_prepare_suspend(void)
11{
12 /* If you want to make non-PSE machine work, turn off paging
13 in swsusp_arch_suspend. swsusp_pg_dir should have identity mapping, so
14 it could work... */
15 if (!cpu_has_pse) {
16 printk(KERN_ERR "PSE is required for swsusp.\n");
17 return -EPERM;
18 }
19 return 0;
20}
21
22/* image of the saved processor state */
23struct saved_context {
24 u16 es, fs, gs, ss;
25 unsigned long cr0, cr2, cr3, cr4;
26 u16 gdt_pad;
27 u16 gdt_limit;
28 unsigned long gdt_base;
29 u16 idt_pad;
30 u16 idt_limit;
31 unsigned long idt_base;
32 u16 ldt;
33 u16 tss;
34 unsigned long tr;
35 unsigned long safety;
36 unsigned long return_address;
37} __attribute__((packed));
38
39#define loaddebug(thread,register) \
40 __asm__("movl %0,%%db" #register \
41 : /* no output */ \
42 :"r" ((thread)->debugreg[register]))
43
44#ifdef CONFIG_ACPI_SLEEP
45extern unsigned long saved_eip;
46extern unsigned long saved_esp;
47extern unsigned long saved_ebp;
48extern unsigned long saved_ebx;
49extern unsigned long saved_esi;
50extern unsigned long saved_edi;
51
52static inline void acpi_save_register_state(unsigned long return_point)
53{
54 saved_eip = return_point;
55 asm volatile ("movl %%esp,%0" : "=m" (saved_esp));
56 asm volatile ("movl %%ebp,%0" : "=m" (saved_ebp));
57 asm volatile ("movl %%ebx,%0" : "=m" (saved_ebx));
58 asm volatile ("movl %%edi,%0" : "=m" (saved_edi));
59 asm volatile ("movl %%esi,%0" : "=m" (saved_esi));
60}
61
62#define acpi_restore_register_state() do {} while (0)
63
64/* routines for saving/restoring kernel state */
65extern int acpi_save_state_mem(void);
66#endif