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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Michal Kebrt |
2 | * Copyright (c) 2007 Michal Kebrt |
3 | * Copyright (c) 2007 Petr Stepan |
3 | * Copyright (c) 2007 Petr Stepan |
4 | * |
4 | * |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without |
7 | * Redistribution and use in source and binary forms, with or without |
8 | * modification, are permitted provided that the following conditions |
8 | * modification, are permitted provided that the following conditions |
9 | * are met: |
9 | * are met: |
10 | * |
10 | * |
11 | * - Redistributions of source code must retain the above copyright |
11 | * - Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. |
12 | * notice, this list of conditions and the following disclaimer. |
13 | * - Redistributions in binary form must reproduce the above copyright |
13 | * - Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
15 | * documentation and/or other materials provided with the distribution. |
16 | * - The name of the author may not be used to endorse or promote products |
16 | * - The name of the author may not be used to endorse or promote products |
17 | * derived from this software without specific prior written permission. |
17 | * derived from this software without specific prior written permission. |
18 | * |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 | */ |
29 | */ |
30 | 30 | ||
31 | /** @addtogroup arm32 |
31 | /** @addtogroup arm32 |
32 | * @{ |
32 | * @{ |
33 | */ |
33 | */ |
34 | /** @file |
34 | /** @file |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #ifndef KERN_arm32_EXCEPTION_H_ |
37 | #ifndef KERN_arm32_EXCEPTION_H_ |
38 | #define KERN_arm32_EXCEPTION_H_ |
38 | #define KERN_arm32_EXCEPTION_H_ |
39 | 39 | ||
40 | #include <arch/types.h> |
40 | #include <arch/types.h> |
- | 41 | #include <arch/regutils.h> |
|
41 | 42 | ||
42 | #define HIGH_EXCEPTION_VECTORS |
43 | #define HIGH_EXCEPTION_VECTORS |
43 | 44 | ||
44 | #ifdef HIGH_EXCEPTION_VECTORS |
45 | #ifdef HIGH_EXCEPTION_VECTORS |
45 | #define EXC_BASE_ADDRESS 0xffff0000 |
46 | #define EXC_BASE_ADDRESS 0xffff0000 |
46 | #else |
47 | #else |
47 | #define EXC_BASE_ADDRESS 0x0 |
48 | #define EXC_BASE_ADDRESS 0x0 |
48 | #endif |
49 | #endif |
49 | 50 | ||
50 | /* Exception Vectors */ |
51 | /* Exception Vectors */ |
51 | #define EXC_RESET_VEC (EXC_BASE_ADDRESS + 0x0) |
52 | #define EXC_RESET_VEC (EXC_BASE_ADDRESS + 0x0) |
52 | #define EXC_UNDEF_INSTR_VEC (EXC_BASE_ADDRESS + 0x4) |
53 | #define EXC_UNDEF_INSTR_VEC (EXC_BASE_ADDRESS + 0x4) |
53 | #define EXC_SWI_VEC (EXC_BASE_ADDRESS + 0x8) |
54 | #define EXC_SWI_VEC (EXC_BASE_ADDRESS + 0x8) |
54 | #define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc) |
55 | #define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc) |
55 | #define EXC_DATA_ABORT_VEC (EXC_BASE_ADDRESS + 0x10) |
56 | #define EXC_DATA_ABORT_VEC (EXC_BASE_ADDRESS + 0x10) |
56 | #define EXC_IRQ_VEC (EXC_BASE_ADDRESS + 0x18) |
57 | #define EXC_IRQ_VEC (EXC_BASE_ADDRESS + 0x18) |
57 | #define EXC_FIQ_VEC (EXC_BASE_ADDRESS + 0x1c) |
58 | #define EXC_FIQ_VEC (EXC_BASE_ADDRESS + 0x1c) |
58 | 59 | ||
59 | /* Exception numbers */ |
60 | /* Exception numbers */ |
60 | #define EXC_RESET 0 |
61 | #define EXC_RESET 0 |
61 | #define EXC_UNDEF_INSTR 1 |
62 | #define EXC_UNDEF_INSTR 1 |
62 | #define EXC_SWI 2 |
63 | #define EXC_SWI 2 |
63 | #define EXC_PREFETCH_ABORT 3 |
64 | #define EXC_PREFETCH_ABORT 3 |
64 | #define EXC_DATA_ABORT 4 |
65 | #define EXC_DATA_ABORT 4 |
65 | #define EXC_IRQ 5 |
66 | #define EXC_IRQ 5 |
66 | #define EXC_FIQ 6 |
67 | #define EXC_FIQ 6 |
67 | 68 | ||
68 | typedef struct { |
69 | typedef struct { |
69 | uint32_t spsr; |
70 | uint32_t spsr; |
70 | uint32_t sp; |
71 | uint32_t sp; |
71 | uint32_t lr; |
72 | uint32_t lr; |
72 | 73 | ||
73 | uint32_t r0; |
74 | uint32_t r0; |
74 | uint32_t r1; |
75 | uint32_t r1; |
75 | uint32_t r2; |
76 | uint32_t r2; |
76 | uint32_t r3; |
77 | uint32_t r3; |
77 | uint32_t r4; |
78 | uint32_t r4; |
78 | uint32_t r5; |
79 | uint32_t r5; |
79 | uint32_t r6; |
80 | uint32_t r6; |
80 | uint32_t r7; |
81 | uint32_t r7; |
81 | uint32_t r8; |
82 | uint32_t r8; |
82 | uint32_t r9; |
83 | uint32_t r9; |
83 | uint32_t r10; |
84 | uint32_t r10; |
84 | uint32_t r11; |
85 | uint32_t r11; |
85 | uint32_t r12; |
86 | uint32_t r12; |
86 | 87 | ||
87 | uint32_t pc; |
88 | uint32_t pc; |
88 | } istate_t; |
89 | } istate_t; |
89 | 90 | ||
90 | 91 | ||
91 | 92 | ||
92 | static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr) |
93 | static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr) |
93 | { |
94 | { |
94 | istate->lr = retaddr; |
95 | istate->pc = retaddr; |
95 | } |
96 | } |
96 | 97 | ||
97 | /** Return true if exception happened while in userspace */ |
98 | /** Return true if exception happened while in userspace */ |
98 | static inline int istate_from_uspace(istate_t *istate) |
99 | static inline int istate_from_uspace(istate_t *istate) |
99 | { |
100 | { |
100 | return !(istate->lr & 0x80000000); |
101 | return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE; |
101 | return 0; |
- | |
102 | } |
102 | } |
103 | static inline unative_t istate_get_pc(istate_t *istate) |
103 | static inline unative_t istate_get_pc(istate_t *istate) |
104 | { |
104 | { |
105 | return istate->lr; |
105 | return istate->pc; |
106 | } |
106 | } |
107 | 107 | ||
108 | extern void setup_exception_stacks(void); |
108 | extern void setup_exception_stacks(void); |
109 | extern void install_exception_handlers(void); |
109 | extern void install_exception_handlers(void); |
110 | extern void exception_init(void); |
110 | extern void exception_init(void); |
111 | 111 | ||
112 | #endif |
112 | #endif |
113 | 113 | ||
114 | /** @} |
114 | /** @} |
115 | */ |
115 | */ |
116 | 116 |