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1da177e4 LT |
1 | /* |
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 | ||
9 | static inline int | |
10 | arch_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 */ | |
23 | struct 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 | ||
1da177e4 LT |
39 | #ifdef CONFIG_ACPI_SLEEP |
40 | extern unsigned long saved_eip; | |
41 | extern unsigned long saved_esp; | |
42 | extern unsigned long saved_ebp; | |
43 | extern unsigned long saved_ebx; | |
44 | extern unsigned long saved_esi; | |
45 | extern unsigned long saved_edi; | |
46 | ||
47 | static inline void acpi_save_register_state(unsigned long return_point) | |
48 | { | |
49 | saved_eip = return_point; | |
50 | asm volatile ("movl %%esp,%0" : "=m" (saved_esp)); | |
51 | asm volatile ("movl %%ebp,%0" : "=m" (saved_ebp)); | |
52 | asm volatile ("movl %%ebx,%0" : "=m" (saved_ebx)); | |
53 | asm volatile ("movl %%edi,%0" : "=m" (saved_edi)); | |
54 | asm volatile ("movl %%esi,%0" : "=m" (saved_esi)); | |
55 | } | |
56 | ||
57 | #define acpi_restore_register_state() do {} while (0) | |
58 | ||
59 | /* routines for saving/restoring kernel state */ | |
60 | extern int acpi_save_state_mem(void); | |
61 | #endif |