arch/sparc/include/asm/visasm.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/visasm.h

Extension

.h

Size

1545 bytes

Lines

68

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• asm/pstate.h
• asm/ptrace.h

Detected Declarations

• function save_and_clear_fpu

Annotated Snippet

static inline void save_and_clear_fpu(void) {
	__asm__ __volatile__ (
"		rd %%fprs, %%o5\n"
"		andcc %%o5, %0, %%g0\n"
"		be,pt %%icc, 299f\n"
"		 sethi %%hi(298f), %%g7\n"
"		sethi %%hi(VISenter), %%g1\n"
"		jmpl %%g1 + %%lo(VISenter), %%g0\n"
"		 or %%g7, %%lo(298f), %%g7\n"
"	298:	wr %%g0, 0, %%fprs\n"
"	299:\n"
"		" : : "i" (FPRS_FEF|FPRS_DU) :
		"o5", "g1", "g2", "g3", "g7", "cc");
}

int vis_emul(struct pt_regs *, unsigned int);
#endif

#endif /* _SPARC64_ASI_H */

Annotation

• Immediate include surface: `asm/pstate.h`, `asm/ptrace.h`.
• Detected declarations: `function save_and_clear_fpu`.
• 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.