1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
; ###----------------------------------------------------------------###
; # file : it001.u #
; # date : Mar 26 1996 #
; # descr. : functional test for mips #
; ###----------------------------------------------------------------###
; ###--------------------------------------------------------###
; # decrementation loop (with a hardware interrupt) #
; ###--------------------------------------------------------###
timer_0 .equ 0x40000100
timer_1 .equ 0x40000104
timer_2 .equ 0x40000108
timer_3 .equ 0x4000010C
timer_4 .equ 0x40000110
timer_5 .equ 0x40000114
timer_rst .equ 0x40000118
timer_sts .equ 0x4000011C
value .equ 0x0008
v_sts .equ 0x0002
.org 0x00400000
.start init
init:
loadi r31, back_from_int
loadi r1 , timer_1
addiu r2 , r0 , value
sw r2, 0(r1)
loadi r1 , timer_sts
addiu r2 , r0 , v_sts
sw r2, 0(r1)
addiu r10, r0 , 0x0001
lui r20, 0xffff
addiu r16, r0, 0xfffb
or r20, r20, r16
loop:
addu r20,r10,r20
bne r20,r10, loop
nop
j bad
nop
back_from_int:
j good
nop
.org 0x004000d0
good: j good
nop
bad: j bad
nop
.end
|
