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2278 | jancik | 1 | /* |
2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup arm32mm |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | #ifndef KERN_arm32_PAGE_FAULT_H_ |
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35 | #define KERN_arm32_PAGE_FAULT_H |
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36 | |||
37 | #include <arch/types.h> |
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38 | |||
39 | /** |
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40 | * Decribes structure of fault status register in coprocessor 15 |
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41 | */ |
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42 | typedef struct { |
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43 | unsigned status : 3; |
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44 | unsigned domain : 4; |
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45 | unsigned zero : 1; |
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46 | unsigned should_be_zero : 24; |
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47 | } __attribute__ ((packed)) fault_status_t; |
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48 | |||
49 | /** |
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50 | * Help union used for overcasting integer value into fault_status_t type |
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51 | */ |
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52 | typedef union { |
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53 | fault_status_t fsr; |
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54 | uint32_t dummy; |
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55 | } fault_status_union_t; |
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56 | |||
57 | /** |
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58 | * Very simplyfied description of instruction code structure intended for |
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59 | * recognising memmory access of instruction ( reads or writes into memmory) |
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60 | * more details: see ARM architecture preference |
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61 | * chapter:3.1 Instruction set encoding |
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62 | */ |
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63 | typedef struct { |
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64 | unsigned dummy1 : 4; |
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65 | unsigned bit4 : 1; |
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66 | unsigned bits567 : 3; |
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67 | unsigned dummy : 12; |
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68 | unsigned access : 1; |
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69 | unsigned opcode : 4; |
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70 | unsigned instr_type : 3; |
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71 | unsigned condition : 4; |
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72 | } __attribute__ ((packed)) instruction_t; |
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73 | |||
74 | /** |
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75 | * Help union used for overcasting ip register (uint_32_t) value into |
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76 | * instruction_t pointer |
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77 | */ |
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78 | typedef union { |
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79 | instruction_t* instr; |
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80 | uint32_t ip; |
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81 | } instruction_union_t; |
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82 | |||
83 | extern void prefetch_abort(int n, istate_t *istate); |
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84 | extern void data_abort(int n, istate_t *istate); |
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85 | |||
86 | #endif |
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87 | |||
88 | /** @} |
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89 | */ |
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90 |