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2128 | jermar | 1 | /* |
2304 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
2180 | stepan | 3 | * |
2128 | jermar | 4 | * All rights reserved. |
5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * |
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10 | * - Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * - Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * - The name of the author may not be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | /** @addtogroup arm32 |
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31 | * @{ |
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32 | */ |
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33 | /** @file |
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34 | */ |
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35 | |||
36 | #ifndef KERN_arm32_EXCEPTION_H_ |
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37 | #define KERN_arm32_EXCEPTION_H_ |
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38 | |||
39 | #include <arch/types.h> |
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2298 | stepan | 40 | #include <arch/regutils.h> |
2128 | jermar | 41 | |
2329 | kebrt | 42 | |
2262 | stepan | 43 | #define HIGH_EXCEPTION_VECTORS |
44 | |||
45 | #ifdef HIGH_EXCEPTION_VECTORS |
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46 | #define EXC_BASE_ADDRESS 0xffff0000 |
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47 | #else |
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48 | #define EXC_BASE_ADDRESS 0x0 |
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49 | #endif |
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50 | |||
2180 | stepan | 51 | /* Exception Vectors */ |
2304 | kebrt | 52 | #define EXC_RESET_VEC (EXC_BASE_ADDRESS + 0x0) |
53 | #define EXC_UNDEF_INSTR_VEC (EXC_BASE_ADDRESS + 0x4) |
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54 | #define EXC_SWI_VEC (EXC_BASE_ADDRESS + 0x8) |
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55 | #define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc) |
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56 | #define EXC_DATA_ABORT_VEC (EXC_BASE_ADDRESS + 0x10) |
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57 | #define EXC_IRQ_VEC (EXC_BASE_ADDRESS + 0x18) |
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58 | #define EXC_FIQ_VEC (EXC_BASE_ADDRESS + 0x1c) |
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2180 | stepan | 59 | |
2235 | stepan | 60 | /* Exception numbers */ |
2304 | kebrt | 61 | #define EXC_RESET 0 |
62 | #define EXC_UNDEF_INSTR 1 |
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63 | #define EXC_SWI 2 |
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64 | #define EXC_PREFETCH_ABORT 3 |
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65 | #define EXC_DATA_ABORT 4 |
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66 | #define EXC_IRQ 5 |
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67 | #define EXC_FIQ 6 |
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2235 | stepan | 68 | |
2329 | kebrt | 69 | |
70 | /** Structure representing CPU state saved when an exception occurs. */ |
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2128 | jermar | 71 | typedef struct { |
2304 | kebrt | 72 | uint32_t spsr; |
2286 | stepan | 73 | uint32_t sp; |
74 | uint32_t lr; |
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2178 | kebrt | 75 | |
2304 | kebrt | 76 | uint32_t r0; |
77 | uint32_t r1; |
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78 | uint32_t r2; |
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79 | uint32_t r3; |
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80 | uint32_t r4; |
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81 | uint32_t r5; |
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82 | uint32_t r6; |
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83 | uint32_t r7; |
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84 | uint32_t r8; |
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85 | uint32_t r9; |
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86 | uint32_t r10; |
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87 | uint32_t r11; |
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88 | uint32_t r12; |
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2286 | stepan | 89 | |
2304 | kebrt | 90 | uint32_t pc; |
2128 | jermar | 91 | } istate_t; |
92 | |||
2286 | stepan | 93 | |
94 | |||
2128 | jermar | 95 | static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr) |
96 | { |
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2298 | stepan | 97 | istate->pc = retaddr; |
2128 | jermar | 98 | } |
99 | |||
2329 | kebrt | 100 | |
101 | /** Return true if exception happened while in userspace. */ |
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2128 | jermar | 102 | static inline int istate_from_uspace(istate_t *istate) |
103 | { |
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2298 | stepan | 104 | return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE; |
2128 | jermar | 105 | } |
2329 | kebrt | 106 | |
107 | |||
2128 | jermar | 108 | static inline unative_t istate_get_pc(istate_t *istate) |
109 | { |
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2298 | stepan | 110 | return istate->pc; |
2128 | jermar | 111 | } |
112 | |||
2329 | kebrt | 113 | |
2235 | stepan | 114 | extern void setup_exception_stacks(void); |
2180 | stepan | 115 | extern void install_exception_handlers(void); |
116 | extern void exception_init(void); |
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2304 | kebrt | 117 | extern void print_istate(istate_t *istate); |
2180 | stepan | 118 | |
2329 | kebrt | 119 | |
2128 | jermar | 120 | #endif |
121 | |||
122 | /** @} |
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123 | */ |