arch/arm/include/asm/hardware/memc.h

File Facts

System

Linux kernel

Corpus path

arch/arm/include/asm/hardware/memc.h

Extension

.h

Size

550 bytes

Lines

24

Domain

Architecture Layer

Bucket

arch/arm

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

#define VDMA_ALIGNMENT	PAGE_SIZE
#define VDMA_XFERSIZE	16
#define VDMA_INIT	0
#define VDMA_START	1
#define VDMA_END	2

#ifndef __ASSEMBLY__
extern void memc_write(unsigned int reg, unsigned long val);

#define video_set_dma(start,end,offset)				\
do {								\
	memc_write (VDMA_START, (start >> 2));			\
	memc_write (VDMA_END, (end - VDMA_XFERSIZE) >> 2);	\
	memc_write (VDMA_INIT, (offset >> 2));			\
} while (0)

#endif

Annotation

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