arch/openrisc/include/asm/spr.h

File Facts

System

Linux kernel

Corpus path

arch/openrisc/include/asm/spr.h

Extension

.h

Size

991 bytes

Lines

39

Domain

Architecture Layer

Bucket

arch/openrisc

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 Copyright
• function mfspr_off

Annotated Snippet

#ifndef __ASM_OPENRISC_SPR_H
#define __ASM_OPENRISC_SPR_H

#define mtspr(_spr, _val) __asm__ __volatile__ (		\
	"l.mtspr r0,%1,%0"					\
	: : "K" (_spr), "r" (_val))
#define mtspr_off(_spr, _off, _val) __asm__ __volatile__ (	\
	"l.mtspr %0,%1,%2"					\
	: : "r" (_off), "r" (_val), "K" (_spr))

static inline unsigned long mfspr(unsigned long add)
{
	unsigned long ret;
	__asm__ __volatile__ ("l.mfspr %0,r0,%1" : "=r" (ret) : "K" (add));
	return ret;
}

static inline unsigned long mfspr_off(unsigned long add, unsigned long offset)
{
	unsigned long ret;
	__asm__ __volatile__ ("l.mfspr %0,%1,%2" : "=r" (ret)
						 : "r" (offset), "K" (add));
	return ret;
}

#endif

Annotation

• Detected declarations: `function Copyright`, `function mfspr_off`.
• Atlas domain: Architecture Layer / arch/openrisc.
• 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.