tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
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#ifdef CONFIG_ACPI_SLEEP
40extern unsigned long saved_eip;
41extern unsigned long saved_esp;
42extern unsigned long saved_ebp;
43extern unsigned long saved_ebx;
44extern unsigned long saved_esi;
45extern unsigned long saved_edi;
46
47static 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 */
60extern int acpi_save_state_mem(void);
61#endif