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| Rev | Author | Line No. | Line |
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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 | |||
| 2243 | kebrt | 71 | typedef uint32_t __address; |
| 72 | |||
| 73 | |||
| 2241 | kebrt | 74 | /** Page table entry. |
| 75 | * |
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| 76 | * We have different structs for level 0 and level 1 page table entries. |
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| 77 | * */ |
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| 2128 | jermar | 78 | typedef struct { |
| 2147 | jancik | 79 | unsigned dummy : 32; |
| 2128 | jermar | 80 | } pte_t; |
| 81 | |||
| 2241 | kebrt | 82 | /** Level 0 page table entry. */ |
| 2147 | jancik | 83 | typedef struct { |
| 2241 | kebrt | 84 | /* 01b for coarse tables, see below for details */ |
| 2149 | jancik | 85 | unsigned descriptor_type : 2; |
| 2241 | kebrt | 86 | unsigned impl_specific : 3; |
| 2147 | jancik | 87 | unsigned domain : 4; |
| 2149 | jancik | 88 | unsigned should_be_zero : 1; |
| 2241 | kebrt | 89 | /* Pointer to the coarse 2nd level page table (holding entries for small (4KB) |
| 90 | * or large (64KB) pages. ARM also supports fine 2nd level page tables that |
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| 91 | * may hold even tiny pages (1KB) but they are bigger (4KB per table in comparison |
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| 92 | * with 1KB per the coarse table) |
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| 93 | */ |
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| 2147 | jancik | 94 | unsigned coarse_table_addr : 22; |
| 95 | } __attribute__ ((packed)) pte_level0_t; |
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| 96 | |||
| 2241 | kebrt | 97 | /** Level 1 page table entry (small (4KB) pages used) */ |
| 2147 | jancik | 98 | typedef struct { |
| 2241 | kebrt | 99 | /* 0b10 for small pages */ |
| 2149 | jancik | 100 | unsigned descriptor_type : 2; |
| 2147 | jancik | 101 | unsigned bufferable : 1; |
| 102 | unsigned cacheable : 1; |
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| 2241 | kebrt | 103 | /* access permissions for each of 4 subparts of a page |
| 104 | * (for each 1KB when small pages used */ |
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| 2147 | jancik | 105 | unsigned access_permission_0 : 2; |
| 106 | unsigned access_permission_1 : 2; |
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| 107 | unsigned access_permission_2 : 2; |
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| 108 | unsigned access_permission_3 : 2; |
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| 109 | unsigned frame_base_addr : 20; |
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| 2149 | jancik | 110 | } __attribute__ ((packed)) pte_level1_t; |
| 2147 | jancik | 111 | |
| 2241 | kebrt | 112 | |
| 113 | /* Level 1 page tables access permissions */ |
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| 114 | |||
| 115 | /** User mode: no access, privileged mode: no access */ |
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| 2147 | jancik | 116 | #define pte_ap_user_no_kernel_no 0 |
| 2241 | kebrt | 117 | /** User mode: no access, privileged mode: read/write */ |
| 2147 | jancik | 118 | #define pte_ap_user_no_kernel_rw 1 |
| 2241 | kebrt | 119 | /** User mode: read only, privileged mode: read/write */ |
| 2147 | jancik | 120 | #define pte_ap_user_ro_kernel_rw 2 |
| 2241 | kebrt | 121 | /// User mode: read/write, privileged mode: read/write |
| 122 | #define pte_ap_user_rw_kernel_rw 3 |
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| 2147 | jancik | 123 | |
| 2241 | kebrt | 124 | |
| 125 | /* pte_level0_t and pte_level1_t descriptor_type flags */ |
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| 126 | |||
| 127 | /** pte_level0_t and pte_level1_t "not present" flag (used in descriptor_type) */ |
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| 128 | #define pte_descriptor_not_preset 0 |
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| 129 | /** pte_level0_t coarse page table flag (used in descriptor_type) */ |
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| 2147 | jancik | 130 | #define pte_descriptor_coarse_table 1 |
| 2241 | kebrt | 131 | /** pte_level1_t small page table flag (used in descriptor type) */ |
| 132 | #define pte_descriptor_small_page 2 |
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| 2147 | jancik | 133 | |
| 2241 | kebrt | 134 | |
| 2128 | jermar | 135 | #endif |
| 136 | |||
| 137 | /** @} |
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| 138 | */ |