arch/x86/realmode/rm/wakeup.h

   1 /*
   2  * Definitions for the wakeup data structure at the head of the
   3  * wakeup code.
   4  */
   5
   6 #ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
   7 #define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
   8
   9 #ifndef __ASSEMBLY__
  10 #include <linux/types.h>
  11
  12 /* This must match data at wakeup.S */
  13 struct wakeup_header {
  14         u16 video_mode;         /* Video mode number */
  15         u32 pmode_entry;        /* Protected mode resume point, 32-bit only */
  16         u16 pmode_cs;
  17         u32 pmode_cr0;          /* Protected mode cr0 */
  18         u32 pmode_cr3;          /* Protected mode cr3 */
  19         u32 pmode_cr4;          /* Protected mode cr4 */
  20         u32 pmode_efer_low;     /* Protected mode EFER */
  21         u32 pmode_efer_high;
  22         u64 pmode_gdt;
  23         u32 pmode_misc_en_low;  /* Protected mode MISC_ENABLE */
  24         u32 pmode_misc_en_high;
  25         u32 pmode_behavior;     /* Wakeup routine behavior flags */
  26         u32 realmode_flags;
  27         u32 real_magic;
  28         u32 signature;          /* To check we have correct structure */
  29 } __attribute__((__packed__));
  30
  31 extern struct wakeup_header wakeup_header;
  32 #endif
  33
  34 #define WAKEUP_HEADER_OFFSET    8
  35 #define WAKEUP_HEADER_SIGNATURE 0x51ee1111
  36
  37 /* Wakeup behavior bits */
  38 #define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE     0
  39 #define WAKEUP_BEHAVIOR_RESTORE_CR4             1
  40 #define WAKEUP_BEHAVIOR_RESTORE_EFER            2
  41
  42 #endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */