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| 1 | /* |
1 | /* |
| 2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
2 | * Copyright (c) 2007 Pavel Jancik, Michal Kebrt |
| 3 | * All rights reserved. |
3 | * All rights reserved. |
| 4 | * |
4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
7 | * are met: |
| 8 | * |
8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
| 14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
| 16 | * |
16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
27 | */ |
| 28 | 28 | ||
| 29 | /** @addtogroup arm32 |
29 | /** @addtogroup arm32 |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #ifndef KERN_arm32_TYPES_H_ |
35 | #ifndef KERN_arm32_TYPES_H_ |
| 36 | #define KERN_arm32_TYPES_H_ |
36 | #define KERN_arm32_TYPES_H_ |
| 37 | 37 | ||
| 38 | #define NULL 0 |
38 | #define NULL 0 |
| 39 | #define false 0 |
39 | #define false 0 |
| 40 | #define true 1 |
40 | #define true 1 |
| 41 | 41 | ||
| 42 | typedef signed char int8_t; |
42 | typedef signed char int8_t; |
| 43 | typedef signed short int16_t; |
43 | typedef signed short int16_t; |
| 44 | typedef signed long int32_t; |
44 | typedef signed long int32_t; |
| 45 | typedef signed long long int64_t; |
45 | typedef signed long long int64_t; |
| 46 | 46 | ||
| 47 | typedef unsigned char uint8_t; |
47 | typedef unsigned char uint8_t; |
| 48 | typedef unsigned short uint16_t; |
48 | typedef unsigned short uint16_t; |
| 49 | typedef unsigned long uint32_t; |
49 | typedef unsigned long uint32_t; |
| 50 | typedef unsigned long long uint64_t; |
50 | typedef unsigned long long uint64_t; |
| 51 | 51 | ||
| 52 | typedef uint32_t size_t; |
52 | typedef uint32_t size_t; |
| 53 | typedef uint32_t count_t; |
53 | typedef uint32_t count_t; |
| 54 | typedef uint32_t index_t; |
54 | typedef uint32_t index_t; |
| 55 | 55 | ||
| 56 | typedef uint32_t uintptr_t; |
56 | typedef uint32_t uintptr_t; |
| 57 | typedef uint32_t pfn_t; |
57 | typedef uint32_t pfn_t; |
| 58 | 58 | ||
| 59 | typedef uint32_t ipl_t; |
59 | typedef uint32_t ipl_t; |
| 60 | 60 | ||
| 61 | typedef uint32_t unative_t; |
61 | typedef uint32_t unative_t; |
| 62 | typedef int32_t native_t; |
62 | typedef int32_t native_t; |
| 63 | 63 | ||
| 64 | typedef uint8_t bool; |
64 | typedef uint8_t bool; |
| 65 | typedef uint64_t task_id_t; |
65 | typedef uint64_t task_id_t; |
| 66 | typedef uint32_t context_id_t; |
66 | typedef uint32_t context_id_t; |
| 67 | 67 | ||
| 68 | typedef int32_t inr_t; |
68 | typedef int32_t inr_t; |
| 69 | typedef int32_t devno_t; |
69 | typedef int32_t devno_t; |
| 70 | 70 | ||
| 71 | - | ||
| 72 | /** Page table entry. |
71 | /** Page table entry. |
| 73 | * |
72 | * |
| 74 | * We have different structs for level 0 and level 1 page table entries. |
73 | * We have different structs for level 0 and level 1 page table entries. |
| - | 74 | * Note: See page.h for pte_level*_t types of different levels of page table. |
|
| 75 | * */ |
75 | * */ |
| 76 | typedef struct { |
76 | typedef struct { |
| 77 | unsigned dummy : 32; |
77 | unsigned dummy : 32; |
| 78 | } pte_t; |
78 | } pte_t; |
| 79 | 79 | ||
| 80 | /** Level 0 page table entry. */ |
- | |
| 81 | typedef struct { |
- | |
| 82 | /* 01b for coarse tables, see below for details */ |
- | |
| 83 | unsigned descriptor_type : 2; |
- | |
| 84 | unsigned impl_specific : 3; |
- | |
| 85 | unsigned domain : 4; |
- | |
| 86 | unsigned should_be_zero : 1; |
- | |
| 87 | /* Pointer to the coarse 2nd level page table (holding entries for small (4KB) |
- | |
| 88 | * or large (64KB) pages. ARM also supports fine 2nd level page tables that |
- | |
| 89 | * may hold even tiny pages (1KB) but they are bigger (4KB per table in comparison |
- | |
| 90 | * with 1KB per the coarse table) |
- | |
| 91 | */ |
- | |
| 92 | unsigned coarse_table_addr : 22; |
- | |
| 93 | } __attribute__ ((packed)) pte_level0_t; |
- | |
| 94 | - | ||
| 95 | /** Level 1 page table entry (small (4KB) pages used) */ |
- | |
| 96 | typedef struct { |
- | |
| 97 | /* 0b10 for small pages */ |
- | |
| 98 | unsigned descriptor_type : 2; |
- | |
| 99 | unsigned bufferable : 1; |
- | |
| 100 | unsigned cacheable : 1; |
- | |
| 101 | /* access permissions for each of 4 subparts of a page |
- | |
| 102 | * (for each 1KB when small pages used */ |
- | |
| 103 | unsigned access_permission_0 : 2; |
- | |
| 104 | unsigned access_permission_1 : 2; |
- | |
| 105 | unsigned access_permission_2 : 2; |
- | |
| 106 | unsigned access_permission_3 : 2; |
- | |
| 107 | unsigned frame_base_addr : 20; |
- | |
| 108 | } __attribute__ ((packed)) pte_level1_t; |
- | |
| 109 | - | ||
| 110 | - | ||
| 111 | /* Level 1 page tables access permissions */ |
- | |
| 112 | - | ||
| 113 | /** User mode: no access, privileged mode: no access */ |
- | |
| 114 | #define PTE_AP_USER_NO_KERNEL_NO 0 |
- | |
| 115 | /** User mode: no access, privileged mode: read/write */ |
- | |
| 116 | #define PTE_AP_USER_NO_KERNEL_RW 1 |
- | |
| 117 | /** User mode: read only, privileged mode: read/write */ |
- | |
| 118 | #define PTE_AP_USER_RO_KERNEL_RW 2 |
- | |
| 119 | /// User mode: read/write, privileged mode: read/write |
- | |
| 120 | #define PTE_AP_USER_RW_KERNEL_RW 3 |
- | |
| 121 | - | ||
| 122 | - | ||
| 123 | /* pte_level0_t and pte_level1_t descriptor_type flags */ |
- | |
| 124 | - | ||
| 125 | /** pte_level0_t and pte_level1_t "not present" flag (used in descriptor_type) */ |
- | |
| 126 | #define PTE_DESCRIPTOR_NOT_PRESENT 0 |
- | |
| 127 | /** pte_level0_t coarse page table flag (used in descriptor_type) */ |
- | |
| 128 | #define PTE_DESCRIPTOR_COARSE_TABLE 1 |
- | |
| 129 | /** pte_level1_t small page table flag (used in descriptor type) */ |
- | |
| 130 | #define PTE_DESCRIPTOR_SMALL_PAGE 2 |
- | |
| 131 | - | ||
| 132 | - | ||
| 133 | #endif |
80 | #endif |
| 134 | 81 | ||
| 135 | /** @} |
82 | /** @} |
| 136 | */ |
83 | */ |
| 137 | 84 | ||