arch/alpha/include/asm/dma-mapping.h

File Facts

System

Linux kernel

Corpus path

arch/alpha/include/asm/dma-mapping.h

Extension

.h

Size

272 bytes

Lines

13

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

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 _ALPHA_DMA_MAPPING_H
#define _ALPHA_DMA_MAPPING_H

extern const struct dma_map_ops alpha_pci_ops;

static inline const struct dma_map_ops *get_arch_dma_ops(void)
{
	return &alpha_pci_ops;
}

#endif	/* _ALPHA_DMA_MAPPING_H */

Annotation

• Atlas domain: Architecture Layer / arch/alpha.
• Implementation status: source implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.