arch/x86/realmode/rm/realmode.h

File Facts

System

Linux kernel

Corpus path

arch/x86/realmode/rm/realmode.h

Extension

.h

Size

526 bytes

Lines

23

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.

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

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#ifndef ARCH_X86_REALMODE_RM_REALMODE_H
#define ARCH_X86_REALMODE_RM_REALMODE_H

#ifdef __ASSEMBLER__

/*
 * 16-bit ljmpw to the real_mode_seg
 *
 * This must be open-coded since gas will choke on using a
 * relocatable symbol for the segment portion.
 */
#define LJMPW_RM(to)	.byte 0xea ; .word (to), real_mode_seg

#endif /* __ASSEMBLER__ */

/*
 * Signature at the end of the realmode region
 */
#define REALMODE_END_SIGNATURE	0x65a22c82

#endif /* ARCH_X86_REALMODE_RM_REALMODE_H */

Annotation

• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.