int_onoff.s

44B0+8019系统

NoInt		EQU	0xC0

	AREA |C$$code|, CODE, READONLY

	EXPORT	DisableInt
DisableInt
	STMDB	sp!, {r0,lr}
	MRS		r0, CPSR
	ORR		r0, r0, #NoInt
	MSR		CPSR_cxsf, r0
	LDMIA	sp!, {r0,lr}
	MOV	pc, lr

	EXPORT	EnableInt
EnableInt
	STMDB	sp!, {r0,lr}
	MRS	r0, CPSR
	BIC	r0, r0, #NoInt
	MSR	CPSR_cxsf, r0
	LDMIA	sp!, {r0,lr}
	MOV	pc, lr

	END