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
|
.section ".interrupt_vectors.text"
.global abort_handler
.global irq_handler
.local generic_handler
.global _interrupt_vectors
_interrupt_vectors:
ldr pc,reset_handler
ldr pc,undefined_handler
ldr pc,swi_handler
ldr pc,prefetch_handler
ldr pc,data_handler
ldr pc,unused_handler
ldr pc,irq_handler_caller
ldr pc,fiq_handler
reset_handler: .word abort
undefined_handler: .word abort
swi_handler: .word abort
prefetch_handler: .word abort
data_handler: .word abort
unused_handler: .word abort
irq_handler_caller: .word irq
fiq_handler: .word abort
//b abort_handler_caller
//b abort_handler_caller
//b abort_handler_caller
//b abort_handler_caller
//b abort_handler_caller
//b abort_handler_caller
//b abort_handler_caller
.globl enable_irq
enable_irq:
mrs r0,cpsr
bic r0,r0,#0x80
msr cpsr_c,r0
bx lr
generic_handler:
b generic_handler
abort_handler_caller:
mov sp, #0x8000
ldr r5, =abort_handler
bx r5
irq:
mov sp, #0x8000
ldr r5, =abort_handler
subs pc,lr,#4
|
