arch/sparc/kernel/dtlb_prot.S

Source file repositories/reference/linux-study-clean/arch/sparc/kernel/dtlb_prot.S

File Facts

System
Linux kernel
Corpus path
arch/sparc/kernel/dtlb_prot.S
Extension
.S
Size
1377 bytes
Lines
56
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.

Dependency Surface

Detected Declarations

Annotated Snippet

mov		TLB_SFSR, %g1
	stxa		%g0, [%g1] ASI_DMMU		! Clear FaultValid bit
	membar		#Sync				! Synchronize stores
	rdpr		%pstate, %g5			! Move into alt-globals
	wrpr		%g5, PSTATE_AG|PSTATE_MG, %pstate
	rdpr		%tl, %g1			! Need a winfixup?
	cmp		%g1, 1				! Trap level >1?
	mov		TLB_TAG_ACCESS, %g4		! For reload of vaddr

/* PROT ** ICACHE line 2: More real fault processing */
	ldxa		[%g4] ASI_DMMU, %g5		! Put tagaccess in %g5
	srlx		%g5, PAGE_SHIFT, %g5
	sllx		%g5, PAGE_SHIFT, %g5		! Clear context ID bits
	bgu,pn		%xcc, winfix_trampoline		! Yes, perform winfixup
	 mov		FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4
	ba,pt		%xcc, sparc64_realfault_common	! Nope, normal fault
	 nop
	nop

/* PROT ** ICACHE line 3: Unused...	*/
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

/* PROT ** ICACHE line 4: Unused...	*/
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

Annotation

Implementation Notes