arch/sparc/kernel/misctrap.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/kernel/misctrap.S

Extension

.S

Size

2080 bytes

Lines

96

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

#ifdef CONFIG_KGDB
	.globl		arch_kgdb_breakpoint
	.type		arch_kgdb_breakpoint,#function
arch_kgdb_breakpoint:
	ta		0x72
	retl
	 nop
	.size		arch_kgdb_breakpoint,.-arch_kgdb_breakpoint
#endif

	.type		__do_privact,#function
__do_privact:
	mov		TLB_SFSR, %g3
	stxa		%g0, [%g3] ASI_DMMU	! Clear FaultValid bit
	membar		#Sync
	sethi		%hi(109f), %g7
	ba,pt		%xcc, etrap
109:	or		%g7, %lo(109b), %g7
	call		do_privact
	 add		%sp, PTREGS_OFF, %o0
	ba,a,pt		%xcc, rtrap
	.size		__do_privact,.-__do_privact

	.type		do_mna,#function
do_mna:
	rdpr		%tl, %g3
	cmp		%g3, 1

	/* Setup %g4/%g5 now as they are used in the
	 * winfixup code.
	 */
	mov		TLB_SFSR, %g3
	mov		DMMU_SFAR, %g4
	ldxa		[%g4] ASI_DMMU, %g4
	ldxa		[%g3] ASI_DMMU, %g5
	stxa		%g0, [%g3] ASI_DMMU	! Clear FaultValid bit
	membar		#Sync
	bgu,pn		%icc, winfix_mna
	 rdpr		%tpc, %g3

1:	sethi		%hi(109f), %g7
	ba,pt		%xcc, etrap
109:	 or		%g7, %lo(109b), %g7
	mov		%l4, %o1
	mov		%l5, %o2
	call		mem_address_unaligned
	 add		%sp, PTREGS_OFF, %o0
	ba,a,pt		%xcc, rtrap
	.size		do_mna,.-do_mna

	.type		do_lddfmna,#function
do_lddfmna:
	sethi		%hi(109f), %g7
	mov		TLB_SFSR, %g4
	ldxa		[%g4] ASI_DMMU, %g5
	stxa		%g0, [%g4] ASI_DMMU	! Clear FaultValid bit
	membar		#Sync
	mov		DMMU_SFAR, %g4
	ldxa		[%g4] ASI_DMMU, %g4
	ba,pt		%xcc, etrap
109:	 or		%g7, %lo(109b), %g7
	mov		%l4, %o1
	mov		%l5, %o2
	call		handle_lddfmna
	 add		%sp, PTREGS_OFF, %o0
	ba,a,pt		%xcc, rtrap
	.size		do_lddfmna,.-do_lddfmna

	.type		do_stdfmna,#function
do_stdfmna:

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.