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
|
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file ARM/compilers/GCC/vectors.s
* @brief Interrupt vectors for ARM devices.
*
* @defgroup ARM_VECTORS ARM Exception Vectors
* @{
*/
#if defined(__DOXYGEN__)
/**
* @brief Unhandled exceptions handler.
* @details Any undefined exception vector points to this function by default.
* This function simply stops the system into an infinite loop.
* @note The default implementation is a weak symbol, the application
* can override the default implementation.
*
* @notapi
*/
void _unhandled_exception(void) {}
#endif
#if !defined(__DOXYGEN__)
.section .vectors, "ax"
.code 32
.balign 4
/*
* System entry points.
*/
.global _start
_start:
ldr pc, _reset
ldr pc, _undefined
ldr pc, _swi
ldr pc, _prefetch
ldr pc, _abort
nop
ldr pc, _irq
ldr pc, _fiq
_reset:
.word Boot_Handler
_undefined:
.word Und_Handler
_swi:
.word Swi_Handler
_prefetch:
.word Prefetch_Handler
_abort:
.word Abort_Handler
_fiq:
.word Fiq_Handler
_irq:
.word Irq_Handler
/*
* Default exceptions handlers. The handlers are declared weak in order to be
* replaced by the real handling code. Everything is defaulted to an infinite
* loop.
*/
.weak Reset_Handler
Reset_Handler:
.weak Und_Handler
Und_Handler:
.weak Swi_Handler
Swi_Handler:
.weak Prefetch_Handler
Prefetch_Handler:
.weak Abort_Handler
Abort_Handler:
.weak Fiq_Handler
Fiq_Handler:
.weak Irq_Handler
Irq_Handler:
.weak _unhandled_exception
_unhandled_exception:
b _unhandled_exception
/*
* Default boot handler. Jump to Reset_Handler.
*/
.section .boot, "ax"
.weak Boot_Handler
Boot_Handler:
b Reset_Handler
#endif
/** @} */
|
