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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
.include "asm/macros.inc"
.include "global.inc"
.section .bss
.global _03807920
_03807920: ;0x03807920
.space 0x03807924 - 0x03807920
.global OSi_NeedResetTimer
OSi_NeedResetTimer: ;0x03807924
.space 0x03807928 - 0x03807924
.global OSi_TickCounter
OSi_TickCounter: ;0x03807928
.space 0x03807930 - 0x03807928
.section .text
arm_func_start OS_GetTick
OS_GetTick: ; 0x037FA364
stmfd sp!, {lr}
sub sp, sp, #12
bl OS_DisableInterrupts
ldr r1, _037FA404 ; =0x04000100
ldrh r1, [r1]
strh r1, [sp]
ldr r1, _037FA408 ; =OSi_TickCounter
ldr ip, [r1]
ldr r3, [r1, #4]
ldr r2, _037FA40C ; =0x0000FFFF
mvn r1, #0
and r2, r3, r2
and r1, ip, r1
str r1, [sp, #4]
str r2, [sp, #8]
ldr r1, _037FA410 ; =0x04000214
ldr r1, [r1]
ands r1, r1, #8
beq _037FA3D8
ldrh r1, [sp]
ands r1, r1, #32768 ; 0x8000
bne _037FA3D8
ldr r3, [sp, #4]
ldr r2, [sp, #8]
mov r1, #1
adds r3, r3, r1
adc r1, r2, #0
str r3, [sp, #4]
str r1, [sp, #8]
_037FA3D8:
bl OS_RestoreInterrupts
ldr r2, [sp, #4]
ldr r0, [sp, #8]
mov r1, r0, lsl #16
orr r1, r1, r2, lsr #16
ldrh r0, [sp]
orr r1, r1, r0, asr #31
orr r0, r0, r2, lsl #16
add sp, sp, #12
ldmia sp!, {lr}
bx lr
_037FA404: .word 0x04000100
_037FA408: .word OSi_TickCounter
_037FA40C: .word 0x0000FFFF
_037FA410: .word 0x04000214
arm_func_start OSi_CountUpTick
OSi_CountUpTick: ; 0x037FA414
stmfd sp!, {lr}
sub sp, sp, #4
ldr r1, _037FA488 ; =OSi_TickCounter
ldr ip, [r1]
ldr r2, [r1, #4]
mov r3, #0
mov r0, #1
adds ip, ip, r0
adc r0, r2, #0
str ip, [r1]
str r0, [r1, #4]
ldr r0, _037FA48C ; =OSi_NeedResetTimer
ldr r1, [r0]
cmp r1, #0
beq _037FA46C
ldr r2, _037FA490 ; =0x04000102
strh r3, [r2]
ldr r1, _037FA494 ; =0x04000100
strh r3, [r1]
mov r1, #193 ; 0xc1
strh r1, [r2]
str r3, [r0]
_037FA46C:
mov r0, #0
ldr r1, _037FA498 ; =OSi_CountUpTick
mov r2, r0
bl OSi_EnterTimerCallback
add sp, sp, #4
ldmia sp!, {lr}
bx lr
_037FA488: .word OSi_TickCounter
_037FA48C: .word OSi_NeedResetTimer
_037FA490: .word 0x04000102
_037FA494: .word 0x04000100
_037FA498: .word OSi_CountUpTick
arm_func_start OS_IsTickAvailable
OS_IsTickAvailable: ; 0x037FA49C
ldr r0, _037FA4A8 ; =_03807920
ldrh r0, [r0]
bx lr
_037FA4A8: .word _03807920
arm_func_start OS_InitTick
OS_InitTick: ; 0x037FA4AC
stmfd sp!, {lr}
sub sp, sp, #4
ldr r0, _037FA528 ; =_03807920
ldrh r1, [r0]
cmp r1, #0
bne _037FA51C
mov r1, #1
strh r1, [r0]
mov r0, #0
bl OSi_SetTimerReserved
mov r2, #0
ldr r0, _037FA52C ; =OSi_TickCounter
str r2, [r0]
str r2, [r0, #4]
ldr r1, _037FA530 ; =0x04000102
strh r2, [r1]
ldr r0, _037FA534 ; =0x04000100
strh r2, [r0]
mov r0, #193 ; 0xc1
strh r0, [r1]
mov r0, #8
ldr r1, _037FA538 ; =OSi_CountUpTick
bl OS_SetIrqFunction
mov r0, #8
bl OS_EnableIrqMask
mov r1, #0
ldr r0, _037FA53C ; =OSi_NeedResetTimer
str r1, [r0]
_037FA51C:
add sp, sp, #4
ldmia sp!, {lr}
bx lr
_037FA528: .word _03807920
_037FA52C: .word OSi_TickCounter
_037FA530: .word 0x04000102
_037FA534: .word 0x04000100
_037FA538: .word OSi_CountUpTick
_037FA53C: .word OSi_NeedResetTimer
|
