arch/x86/realmode/rm/wakeup.h

Source file repositories/reference/linux-study-clean/arch/x86/realmode/rm/wakeup.h

File Facts

System
Linux kernel
Corpus path
arch/x86/realmode/rm/wakeup.h
Extension
.h
Size
1249 bytes
Lines
44
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

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 */

Annotation

Implementation Notes