drivers/iommu/io-pgtable-arm.h

File Facts

System

Linux kernel

Corpus path

drivers/iommu/io-pgtable-arm.h

Extension

.h

Size

812 bytes

Lines

31

Domain

Driver Families

Bucket

drivers/iommu

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

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 IO_PGTABLE_ARM_H_
#define IO_PGTABLE_ARM_H_

#define ARM_LPAE_TCR_TG0_4K		0
#define ARM_LPAE_TCR_TG0_64K		1
#define ARM_LPAE_TCR_TG0_16K		2

#define ARM_LPAE_TCR_TG1_16K		1
#define ARM_LPAE_TCR_TG1_4K		2
#define ARM_LPAE_TCR_TG1_64K		3

#define ARM_LPAE_TCR_SH_NS		0
#define ARM_LPAE_TCR_SH_OS		2
#define ARM_LPAE_TCR_SH_IS		3

#define ARM_LPAE_TCR_RGN_NC		0
#define ARM_LPAE_TCR_RGN_WBWA		1
#define ARM_LPAE_TCR_RGN_WT		2
#define ARM_LPAE_TCR_RGN_WB		3

#define ARM_LPAE_TCR_PS_32_BIT		0x0ULL
#define ARM_LPAE_TCR_PS_36_BIT		0x1ULL
#define ARM_LPAE_TCR_PS_40_BIT		0x2ULL
#define ARM_LPAE_TCR_PS_42_BIT		0x3ULL
#define ARM_LPAE_TCR_PS_44_BIT		0x4ULL
#define ARM_LPAE_TCR_PS_48_BIT		0x5ULL
#define ARM_LPAE_TCR_PS_52_BIT		0x6ULL

#endif /* IO_PGTABLE_ARM_H_ */

Annotation

• Atlas domain: Driver Families / drivers/iommu.
• 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.