arch/powerpc/include/asm/vdso_datapage.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/vdso_datapage.h

Extension

.h

Size

586 bytes

Lines

30

Domain

Architecture Layer

Bucket

arch/powerpc

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

• vdso/datapage.h

Detected Declarations

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

Annotated Snippet

#ifndef _VDSO_DATAPAGE_H
#define _VDSO_DATAPAGE_H
#ifdef __KERNEL__

/*
 * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
 * Copyright (C) 2005 Benjamin Herrenschmidy <benh@kernel.crashing.org>,
 * 		      IBM Corp.
 */

#ifndef __ASSEMBLER__

#include <vdso/datapage.h>

#else /* __ASSEMBLER__ */

.macro get_datapage ptr symbol
	bcl	20, 31, .+4
999:
	mflr	\ptr
	addis	\ptr, \ptr, (\symbol - 999b)@ha
	addi	\ptr, \ptr, (\symbol - 999b)@l
.endm

#endif /* __ASSEMBLER__ */

#endif /* __KERNEL__ */
#endif /* _SYSTEMCFG_H */

Annotation

• Immediate include surface: `vdso/datapage.h`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.