arch/sh/include/asm/entry-macros.S

Source file repositories/reference/linux-study-clean/arch/sh/include/asm/entry-macros.S

File Facts

System
Linux kernel
Corpus path
arch/sh/include/asm/entry-macros.S
Extension
.S
Size
1897 bytes
Lines
124
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: arch/sh
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

! SPDX-License-Identifier: GPL-2.0
! entry.S macro define
	
	.macro	cli
	stc	sr, r0
	or	#0xf0, r0
	ldc	r0, sr
	.endm

	.macro	sti
	mov	#0xfffffff0, r11
	extu.b	r11, r11
	not	r11, r11
	stc	sr, r10
	and	r11, r10
#ifdef CONFIG_CPU_HAS_SR_RB
	stc	k_g_imask, r11
	or	r11, r10
#endif
	ldc	r10, sr
	.endm

	.macro	get_current_thread_info, ti, tmp
#ifdef CONFIG_CPU_HAS_SR_RB
	stc	r7_bank, \ti
#else
	mov	#((THREAD_SIZE - 1) >> 10) ^ 0xff, \tmp
	shll8	\tmp
	shll2	\tmp
	mov	r15, \ti
	and	\tmp, \ti
#endif	
	.endm

#ifdef CONFIG_TRACE_IRQFLAGS

	.macro	TRACE_IRQS_ON
	mov.l	r0, @-r15
	mov.l	r1, @-r15
	mov.l	r2, @-r15
	mov.l	r3, @-r15
	mov.l	r4, @-r15
	mov.l	r5, @-r15
	mov.l	r6, @-r15
	mov.l	r7, @-r15

	mov.l   7834f, r0
	jsr	@r0
	 nop

	mov.l	@r15+, r7
	mov.l	@r15+, r6
	mov.l	@r15+, r5
	mov.l	@r15+, r4
	mov.l	@r15+, r3
	mov.l	@r15+, r2
	mov.l	@r15+, r1
	mov.l	@r15+, r0
	mov.l	7834f, r0

	bra	7835f
	 nop
	.balign	4
7834:	.long	trace_hardirqs_on
7835:
	.endm
	.macro	TRACE_IRQS_OFF

	mov.l	r0, @-r15
	mov.l	r1, @-r15

Annotation

Implementation Notes