arch/um/include/asm/cache.h

File Facts

System

Linux kernel

Corpus path

arch/um/include/asm/cache.h

Extension

.h

Size

483 bytes

Lines

19

Domain

Architecture Layer

Bucket

arch/um

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 __UM_CACHE_H
#define __UM_CACHE_H


#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
# define L1_CACHE_SHIFT		(CONFIG_X86_L1_CACHE_SHIFT)
#elif defined(CONFIG_UML_X86) /* 64-bit */
# define L1_CACHE_SHIFT		6 /* Should be 7 on Intel */
#else
/* XXX: this was taken from x86, now it's completely random. Luckily only
 * affects SMP padding. */
# define L1_CACHE_SHIFT		5
#endif

#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)

#endif

Annotation

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