xref: /linux/arch/x86/include/asm/suspend_32.h (revision 367b8112fe2ea5c39a7bb4d263dcdd9b612fae18)
1 /*
2  * Copyright 2001-2002 Pavel Machek <pavel@suse.cz>
3  * Based on code
4  * Copyright 2001 Patrick Mochel <mochel@osdl.org>
5  */
6 #ifndef _ASM_X86_SUSPEND_32_H
7 #define _ASM_X86_SUSPEND_32_H
8 
9 #include <asm/desc.h>
10 #include <asm/i387.h>
11 
12 static inline int arch_prepare_suspend(void) { return 0; }
13 
14 /* image of the saved processor state */
15 struct saved_context {
16 	u16 es, fs, gs, ss;
17 	unsigned long cr0, cr2, cr3, cr4;
18 	struct desc_ptr gdt;
19 	struct desc_ptr idt;
20 	u16 ldt;
21 	u16 tss;
22 	unsigned long tr;
23 	unsigned long safety;
24 	unsigned long return_address;
25 } __attribute__((packed));
26 
27 #ifdef CONFIG_ACPI
28 extern unsigned long saved_eip;
29 extern unsigned long saved_esp;
30 extern unsigned long saved_ebp;
31 extern unsigned long saved_ebx;
32 extern unsigned long saved_esi;
33 extern unsigned long saved_edi;
34 
35 static inline void acpi_save_register_state(unsigned long return_point)
36 {
37 	saved_eip = return_point;
38 	asm volatile("movl %%esp,%0" : "=m" (saved_esp));
39 	asm volatile("movl %%ebp,%0" : "=m" (saved_ebp));
40 	asm volatile("movl %%ebx,%0" : "=m" (saved_ebx));
41 	asm volatile("movl %%edi,%0" : "=m" (saved_edi));
42 	asm volatile("movl %%esi,%0" : "=m" (saved_esi));
43 }
44 
45 #define acpi_restore_register_state()  do {} while (0)
46 
47 /* routines for saving/restoring kernel state */
48 extern int acpi_save_state_mem(void);
49 #endif
50 
51 #endif /* _ASM_X86_SUSPEND_32_H */
52