arch/sparc/kernel/dtlb_miss.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/kernel/dtlb_miss.S

Extension

.S

Size

786 bytes

Lines

41

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

• 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

ldxa	[%g0] ASI_DMMU_TSB_8KB_PTR, %g1	! Get TSB 8K pointer
	ldxa	[%g0] ASI_DMMU, %g6		! Get TAG TARGET
	srlx	%g6, 48, %g5			! Get context
	sllx	%g6, 22, %g6			! Zero out context
	brz,pn	%g5, kvmap_dtlb			! Context 0 processing
	 srlx	%g6, 22, %g6			! Delay slot
	TSB_LOAD_QUAD(%g1, %g4)			! Load TSB entry
	cmp	%g4, %g6			! Compare TAG

/* DTLB ** ICACHE line 2: TSB compare and TLB load	*/
	bne,pn	%xcc, tsb_miss_dtlb		! Miss
	 mov	FAULT_CODE_DTLB, %g3
	stxa	%g5, [%g0] ASI_DTLB_DATA_IN	! Load TLB
	retry					! Trap done
	nop
	nop
	nop
	nop

/* DTLB ** ICACHE line 3:				*/
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

/* DTLB ** ICACHE line 4: 				*/
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

Annotation

• 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.