arch/sparc/lib/NG4clear_page.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/lib/NG4clear_page.S

Extension

.S

Size

682 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/sparc

Inferred role

Architecture Layer: arch/sparc

Status

atlas-only

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

• asm/asi.h
• asm/page.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#include <asm/asi.h>
#include <asm/page.h>

	.text

	.register	%g3, #scratch

	.align		32
	.globl		NG4clear_page
	.globl		NG4clear_user_page
NG4clear_page:		/* %o0=dest */
NG4clear_user_page:	/* %o0=dest, %o1=vaddr */
	set		PAGE_SIZE, %g7
	mov		0x20, %g3
1:	stxa		%g0, [%o0 + %g0] ASI_ST_BLKINIT_MRU_P
	subcc		%g7, 0x40, %g7
	stxa		%g0, [%o0 + %g3] ASI_ST_BLKINIT_MRU_P
	bne,pt		%xcc, 1b
	 add		%o0, 0x40, %o0
	membar		#StoreLoad|#StoreStore
	retl
	 nop
	.size		NG4clear_page,.-NG4clear_page
	.size		NG4clear_user_page,.-NG4clear_user_page

Annotation

• Immediate include surface: `asm/asi.h`, `asm/page.h`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: atlas-only.

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.