arch/sparc/include/asm/scratchpad.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/scratchpad.h

Extension

.h

Size

547 bytes

Lines

16

Domain

Architecture Layer

Bucket

arch/sparc

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

#ifndef _SPARC64_SCRATCHPAD_H
#define _SPARC64_SCRATCHPAD_H

/* Sun4v scratchpad registers, accessed via ASI_SCRATCHPAD.  */

#define SCRATCHPAD_MMU_MISS	0x00 /* Shared with OBP - set by OBP	    */
#define SCRATCHPAD_CPUID	0x08 /* Shared with OBP - set by hypervisor */
#define SCRATCHPAD_UTSBREG1	0x10
#define SCRATCHPAD_UTSBREG2	0x18
	/* 0x20 and 0x28, hypervisor only... */
#define SCRATCHPAD_UNUSED1	0x30
#define SCRATCHPAD_UNUSED2	0x38 /* Reserved for OBP		    */

#endif /* !(_SPARC64_SCRATCHPAD_H) */

Annotation

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