arch/sh/include/asm/topology.h

File Facts

System

Linux kernel

Corpus path

arch/sh/include/asm/topology.h

Extension

.h

Size

645 bytes

Lines

29

Domain

Architecture Layer

Bucket

arch/sh

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

• asm-generic/topology.h

Detected Declarations

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

Annotated Snippet

#ifndef _ASM_SH_TOPOLOGY_H
#define _ASM_SH_TOPOLOGY_H

#ifdef CONFIG_NUMA

#define cpu_to_node(cpu)	((void)(cpu),0)

#define cpumask_of_node(node)	((void)node, cpu_online_mask)

#define pcibus_to_node(bus)	((void)(bus), -1)
#define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ? \
					cpu_all_mask : \
					cpumask_of_node(pcibus_to_node(bus)))

#endif

#define mc_capable()    (1)

const struct cpumask *cpu_coregroup_mask(int cpu);

extern cpumask_t cpu_core_map[NR_CPUS];

#define topology_core_cpumask(cpu)	(&cpu_core_map[cpu])

#include <asm-generic/topology.h>

#endif /* _ASM_SH_TOPOLOGY_H */

Annotation

• Immediate include surface: `asm-generic/topology.h`.
• Atlas domain: Architecture Layer / arch/sh.
• 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.