arch/alpha/include/asm/sparsemem.h

File Facts

System

Linux kernel

Corpus path

arch/alpha/include/asm/sparsemem.h

Extension

.h

Size

410 bytes

Lines

19

Domain

Architecture Layer

Bucket

arch/alpha

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 _ASM_ALPHA_SPARSEMEM_H
#define _ASM_ALPHA_SPARSEMEM_H

#ifdef CONFIG_SPARSEMEM

#define SECTION_SIZE_BITS	27

/*
 * According to "Alpha Architecture Reference Manual" physical
 * addresses are at most 48 bits.
 * https://download.majix.org/dec/alpha_arch_ref.pdf
 */
#define MAX_PHYSMEM_BITS	48

#endif /* CONFIG_SPARSEMEM */

#endif /* _ASM_ALPHA_SPARSEMEM_H */

Annotation

• Atlas domain: Architecture Layer / arch/alpha.
• 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.