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 */