linux-2.6.33/__irq_svc()(arm)

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説明†

• パス: linux-2.6.33/arch/arm/kernel/entry-armv.S

• FIXME: これは何？
  • 説明

引数†

返り値†

参考†

実装†

	.align	5
__irq_svc:
	svc_entry

• • linux-2.6.33/svc_entry()

#ifdef CONFIG_PREEMPT

• • linux-2.6.33/CONFIG_PREEMPT

	get_thread_info tsk

• • linux-2.6.33/get_thread_info()

	ldr	r8, [tsk, #TI_PREEMPT]		@ get preempt count
	add	r7, r8, #1			@ increment it
	str	r7, [tsk, #TI_PREEMPT]
#endif

	irq_handler

• • linux-2.6.33/irq_handler()

#ifdef CONFIG_PREEMPT
	str	r8, [tsk, #TI_PREEMPT]		@ restore preempt count
	ldr	r0, [tsk, #TI_FLAGS]		@ get flags
	teq	r8, #0				@ if preempt count != 0
	movne	r0, #0				@ force flags to 0
	tst	r0, #_TIF_NEED_RESCHED
	blne	svc_preempt

• • linux-2.6.33/svc_preempt()

#endif
	ldr	r4, [sp, #S_PSR]		@ irqs are already disabled
#ifdef CONFIG_TRACE_IRQFLAGS

• • linux-2.6.33/CONFIG_TRACE_IRQFLAGS

	tst	r4, #PSR_I_BIT
	bleq	trace_hardirqs_on

• • linux-2.6.33/trace_hardirqs_on()

#endif
	svc_exit r4				@ return from exception

• • linux-2.6.33/svc_exit()

 UNWIND(.fnend		)

• • linux-2.6.33/UNWIND()

ENDPROC(__irq_svc)

• • linux-2.6.33/ENDPROC()

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• katsuhiro

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