arch/x86/realmode/rm/wakeup.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Definitions for the wakeup data structure at the head of the
   4  * wakeup code.
   5  */
   6
   7 #ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
   8 #define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
   9
  10 #ifndef __ASSEMBLY__
  11 #include <linux/types.h>
  12
  13 /* This must match data at wakeup.S */
  14 struct wakeup_header {
  15         u16 video_mode;         /* Video mode number */
  16         u32 pmode_entry;        /* Protected mode resume point, 32-bit only */
  17         u16 pmode_cs;
  18         u32 pmode_cr0;          /* Protected mode cr0 */
  19         u32 pmode_cr3;          /* Protected mode cr3 */
  20         u32 pmode_cr4;          /* Protected mode cr4 */
  21         u32 pmode_efer_low;     /* Protected mode EFER */
  22         u32 pmode_efer_high;
  23         u64 pmode_gdt;
  24         u32 pmode_misc_en_low;  /* Protected mode MISC_ENABLE */
  25         u32 pmode_misc_en_high;
  26         u32 pmode_behavior;     /* Wakeup routine behavior flags */
  27         u32 realmode_flags;
  28         u32 real_magic;
  29         u32 signature;          /* To check we have correct structure */
  30 } __attribute__((__packed__));
  31
  32 extern struct wakeup_header wakeup_header;
  33 #endif
  34
  35 #define WAKEUP_HEADER_OFFSET    8
  36 #define WAKEUP_HEADER_SIGNATURE 0x51ee1111
  37
  38 /* Wakeup behavior bits */
  39 #define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE     0
  40 #define WAKEUP_BEHAVIOR_RESTORE_CR4             1
  41 #define WAKEUP_BEHAVIOR_RESTORE_EFER            2
  42
  43 #endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */