arch/x86/include/asm/pc-conf-reg.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/pc-conf-reg.h

Extension

.h

Size

723 bytes

Lines

34

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

• linux/io.h
• linux/spinlock.h
• linux/types.h

Detected Declarations

• function pc_conf_get
• function pc_conf_set

Annotated Snippet

#ifndef _ASM_X86_PC_CONF_REG_H
#define _ASM_X86_PC_CONF_REG_H

#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/types.h>

#define PC_CONF_INDEX		0x22
#define PC_CONF_DATA		0x23

#define PC_CONF_MPS_IMCR	0x70

extern raw_spinlock_t pc_conf_lock;

static inline u8 pc_conf_get(u8 reg)
{
	outb(reg, PC_CONF_INDEX);
	return inb(PC_CONF_DATA);
}

static inline void pc_conf_set(u8 reg, u8 data)
{
	outb(reg, PC_CONF_INDEX);
	outb(data, PC_CONF_DATA);
}

#endif /* _ASM_X86_PC_CONF_REG_H */

Annotation

• Immediate include surface: `linux/io.h`, `linux/spinlock.h`, `linux/types.h`.
• Detected declarations: `function pc_conf_get`, `function pc_conf_set`.
• 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.