include/asm-i386/suspend.h

   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
  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