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-rw-r--r--arch/x86/realmode/rm/wakeup.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/wakeup.h b/arch/x86/realmode/rm/wakeup.h
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index 000000000..0e4fd08ae
--- /dev/null
+++ b/arch/x86/realmode/rm/wakeup.h
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+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Definitions for the wakeup data structure at the head of the
+ * wakeup code.
+ */
+
+#ifndef ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
+#define ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+
+/* This must match data at wakeup.S */
+struct wakeup_header {
+ u16 video_mode; /* Video mode number */
+ u32 pmode_entry; /* Protected mode resume point, 32-bit only */
+ u16 pmode_cs;
+ u32 pmode_cr0; /* Protected mode cr0 */
+ u32 pmode_cr3; /* Protected mode cr3 */
+ u32 pmode_cr4; /* Protected mode cr4 */
+ u32 pmode_efer_low; /* Protected mode EFER */
+ u32 pmode_efer_high;
+ u64 pmode_gdt;
+ u32 pmode_misc_en_low; /* Protected mode MISC_ENABLE */
+ u32 pmode_misc_en_high;
+ u32 pmode_behavior; /* Wakeup routine behavior flags */
+ u32 realmode_flags;
+ u32 real_magic;
+ u32 signature; /* To check we have correct structure */
+} __attribute__((__packed__));
+
+extern struct wakeup_header wakeup_header;
+#endif
+
+#define WAKEUP_HEADER_OFFSET 8
+#define WAKEUP_HEADER_SIGNATURE 0x51ee1111
+
+/* Wakeup behavior bits */
+#define WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE 0
+#define WAKEUP_BEHAVIOR_RESTORE_CR4 1
+#define WAKEUP_BEHAVIOR_RESTORE_EFER 2
+
+#endif /* ARCH_X86_KERNEL_ACPI_RM_WAKEUP_H */