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2128 | jermar | 1 | /* |
2241 | kebrt | 2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
2128 | jermar | 3 | * All rights reserved. |
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 arm32 |
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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 | |||
35 | #ifndef KERN_arm32_TYPES_H_ |
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36 | #define KERN_arm32_TYPES_H_ |
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37 | |||
38 | #define NULL 0 |
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39 | #define false 0 |
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40 | #define true 1 |
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41 | |||
42 | typedef signed char int8_t; |
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43 | typedef signed short int16_t; |
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44 | typedef signed long int32_t; |
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45 | typedef signed long long int64_t; |
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46 | |||
47 | typedef unsigned char uint8_t; |
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48 | typedef unsigned short uint16_t; |
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49 | typedef unsigned long uint32_t; |
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50 | typedef unsigned long long uint64_t; |
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51 | |||
52 | typedef uint32_t size_t; |
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53 | typedef uint32_t count_t; |
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54 | typedef uint32_t index_t; |
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55 | |||
56 | typedef uint32_t uintptr_t; |
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57 | typedef uint32_t pfn_t; |
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58 | |||
59 | typedef uint32_t ipl_t; |
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60 | |||
61 | typedef uint32_t unative_t; |
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62 | typedef int32_t native_t; |
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63 | |||
64 | typedef uint8_t bool; |
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65 | typedef uint64_t task_id_t; |
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66 | typedef uint32_t context_id_t; |
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67 | |||
68 | typedef int32_t inr_t; |
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69 | typedef int32_t devno_t; |
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70 | |||
2241 | kebrt | 71 | /** Page table entry. |
72 | * |
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73 | * We have different structs for level 0 and level 1 page table entries. |
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74 | * */ |
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2128 | jermar | 75 | typedef struct { |
2147 | jancik | 76 | unsigned dummy : 32; |
2128 | jermar | 77 | } pte_t; |
78 | |||
2241 | kebrt | 79 | /** Level 0 page table entry. */ |
2147 | jancik | 80 | typedef struct { |
2241 | kebrt | 81 | /* 01b for coarse tables, see below for details */ |
2149 | jancik | 82 | unsigned descriptor_type : 2; |
2241 | kebrt | 83 | unsigned impl_specific : 3; |
2147 | jancik | 84 | unsigned domain : 4; |
2149 | jancik | 85 | unsigned should_be_zero : 1; |
2241 | kebrt | 86 | /* Pointer to the coarse 2nd level page table (holding entries for small (4KB) |
87 | * or large (64KB) pages. ARM also supports fine 2nd level page tables that |
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88 | * may hold even tiny pages (1KB) but they are bigger (4KB per table in comparison |
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89 | * with 1KB per the coarse table) |
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90 | */ |
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2147 | jancik | 91 | unsigned coarse_table_addr : 22; |
92 | } __attribute__ ((packed)) pte_level0_t; |
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93 | |||
2241 | kebrt | 94 | /** Level 1 page table entry (small (4KB) pages used) */ |
2147 | jancik | 95 | typedef struct { |
2241 | kebrt | 96 | /* 0b10 for small pages */ |
2149 | jancik | 97 | unsigned descriptor_type : 2; |
2147 | jancik | 98 | unsigned bufferable : 1; |
99 | unsigned cacheable : 1; |
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2241 | kebrt | 100 | /* access permissions for each of 4 subparts of a page |
101 | * (for each 1KB when small pages used */ |
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2147 | jancik | 102 | unsigned access_permission_0 : 2; |
103 | unsigned access_permission_1 : 2; |
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104 | unsigned access_permission_2 : 2; |
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105 | unsigned access_permission_3 : 2; |
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106 | unsigned frame_base_addr : 20; |
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2149 | jancik | 107 | } __attribute__ ((packed)) pte_level1_t; |
2147 | jancik | 108 | |
2241 | kebrt | 109 | |
110 | /* Level 1 page tables access permissions */ |
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111 | |||
112 | /** User mode: no access, privileged mode: no access */ |
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2147 | jancik | 113 | #define pte_ap_user_no_kernel_no 0 |
2241 | kebrt | 114 | /** User mode: no access, privileged mode: read/write */ |
2147 | jancik | 115 | #define pte_ap_user_no_kernel_rw 1 |
2241 | kebrt | 116 | /** User mode: read only, privileged mode: read/write */ |
2147 | jancik | 117 | #define pte_ap_user_ro_kernel_rw 2 |
2241 | kebrt | 118 | /// User mode: read/write, privileged mode: read/write |
119 | #define pte_ap_user_rw_kernel_rw 3 |
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2147 | jancik | 120 | |
2241 | kebrt | 121 | |
122 | /* pte_level0_t and pte_level1_t descriptor_type flags */ |
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123 | |||
124 | /** pte_level0_t and pte_level1_t "not present" flag (used in descriptor_type) */ |
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125 | #define pte_descriptor_not_preset 0 |
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126 | /** pte_level0_t coarse page table flag (used in descriptor_type) */ |
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2147 | jancik | 127 | #define pte_descriptor_coarse_table 1 |
2241 | kebrt | 128 | /** pte_level1_t small page table flag (used in descriptor type) */ |
129 | #define pte_descriptor_small_page 2 |
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2147 | jancik | 130 | |
2241 | kebrt | 131 | |
2128 | jermar | 132 | #endif |
133 | |||
134 | /** @} |
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135 | */ |