arch/parisc/include/asm/prefetch.h

File Facts

System

Linux kernel

Corpus path

arch/parisc/include/asm/prefetch.h

Extension

.h

Size

1149 bytes

Lines

46

Domain

Architecture Layer

Bucket

arch/parisc

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

• function PA7300LC
• function prefetchw

Annotated Snippet

#ifndef __ASM_PARISC_PREFETCH_H
#define __ASM_PARISC_PREFETCH_H

#ifndef __ASSEMBLER__
#ifdef CONFIG_PREFETCH

#define ARCH_HAS_PREFETCH
static inline void prefetch(const void *addr)
{
	__asm__(
#ifndef CONFIG_PA20
		/* Need to avoid prefetch of NULL on PA7300LC */
		"	extrw,u,= %0,31,32,%%r0\n"
#endif
		"	ldw 0(%0), %%r0" : : "r" (addr));
}

/* LDD is a PA2.0 addition. */
#ifdef CONFIG_PA20
#define ARCH_HAS_PREFETCHW
static inline void prefetchw(const void *addr)
{
	__asm__("ldd 0(%0), %%r0" : : "r" (addr));
}
#endif /* CONFIG_PA20 */

#endif /* CONFIG_PREFETCH */
#endif /* __ASSEMBLER__ */

#endif /* __ASM_PARISC_PROCESSOR_H */

Annotation

• Detected declarations: `function PA7300LC`, `function prefetchw`.
• Atlas domain: Architecture Layer / arch/parisc.
• 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.