arch/arm/include/asm/vga.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/vga.h

Extension

.h

Size

351 bytes

Lines

16

Domain

Architecture Layer

Bucket

arch/arm

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/io.h

Detected Declarations

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

Annotated Snippet

#ifndef ASMARM_VGA_H
#define ASMARM_VGA_H

#include <linux/io.h>

extern unsigned long vga_base;
extern struct screen_info vgacon_screen_info;

#define VGA_MAP_MEM(x,s)	(vga_base + (x))

#define vga_readb(x)	(*((volatile unsigned char *)x))
#define vga_writeb(x,y)	(*((volatile unsigned char *)y) = (x))

#endif

Annotation

• Immediate include surface: `linux/io.h`.
• Atlas domain: Architecture Layer / arch/arm.
• 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.