timer.cgs

来自「这个是LINUX下的GDB调度工具的源码」· CGS 代码 · 共 32 行

# frv testcase to generate timer interrupt for st $GRk,@($GRi,$GRj)
# mach: fr500 fr550 fr400
# sim: --timer 200,14
	.include "testutils.inc"

	start

	.global align
align:
	and_spr_immed	-4081,tbr		; clear tbr.tt
	set_gr_spr	tbr,gr17
	inc_gr_immed	0x2e0,gr17		; address of exception handler
	set_bctrlr_0_0  gr17
	set_spr_immed	0x7fffffff,lcr
	set_spr_addr	ok1,lr
	and_spr_immed	0xffffff87,psr ; enable external interrupts
	or_spr_immed	0x00000069,psr ; enable external interrupts

	set_gr_immed	10,gr16
	set_gr_immed	0,gr15

again:	cmp		gr15,gr16,icc0
	blt		icc0,0,again
	
	pass

; exception handler
ok1:
	inc_gr_immed	1,gr15
	rett		0
	fail