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| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
| 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 genarchmm |
29 | /** @addtogroup genarchmm |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | /* |
35 | /* |
| 36 | * This is the generic 4-level page table interface. |
36 | * This is the generic 4-level page table interface. |
| 37 | * Architectures that use hierarchical page tables |
37 | * Architectures that use hierarchical page tables |
| 38 | * are supposed to implement *_ARCH macros. |
38 | * are supposed to implement *_ARCH macros. |
| 39 | */ |
39 | */ |
| 40 | 40 | ||
| 41 | #ifdef CONFIG_PAGE_PT |
41 | #ifdef CONFIG_PAGE_PT |
| 42 | 42 | ||
| 43 | #ifndef __PAGE_PT_H__ |
43 | #ifndef __PAGE_PT_H__ |
| 44 | #define __PAGE_PT_H__ |
44 | #define __PAGE_PT_H__ |
| 45 | 45 | ||
| 46 | #include <arch/types.h> |
46 | #include <arch/types.h> |
| 47 | #include <typedefs.h> |
47 | #include <typedefs.h> |
| 48 | #include <mm/page.h> |
48 | #include <mm/page.h> |
| 49 | 49 | ||
| 50 | /* |
50 | /* |
| 51 | * Number of entries in each level. |
51 | * Number of entries in each level. |
| 52 | */ |
52 | */ |
| 53 | #define PTL0_ENTRIES PTL0_ENTRIES_ARCH |
53 | #define PTL0_ENTRIES PTL0_ENTRIES_ARCH |
| 54 | #define PTL1_ENTRIES PTL1_ENTRIES_ARCH |
54 | #define PTL1_ENTRIES PTL1_ENTRIES_ARCH |
| 55 | #define PTL2_ENTRIES PTL2_ENTRIES_ARCH |
55 | #define PTL2_ENTRIES PTL2_ENTRIES_ARCH |
| 56 | #define PTL3_ENTRIES PTL3_ENTRIES_ARCH |
56 | #define PTL3_ENTRIES PTL3_ENTRIES_ARCH |
| 57 | 57 | ||
| 58 | /* |
58 | /* |
| 59 | * These macros process vaddr and extract those portions |
59 | * These macros process vaddr and extract those portions |
| 60 | * of it that function as indices to respective page tables. |
60 | * of it that function as indices to respective page tables. |
| 61 | */ |
61 | */ |
| 62 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
62 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
| 63 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
63 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
| 64 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
64 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
| 65 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
65 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
| 66 | 66 | ||
| 67 | #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
67 | #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
| 68 | 68 | ||
| 69 | /* |
69 | /* |
| 70 | * These macros traverse the 4-level tree of page tables, |
70 | * These macros traverse the 4-level tree of page tables, |
| 71 | * each descending by one level. |
71 | * each descending by one level. |
| 72 | */ |
72 | */ |
| 73 | #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
73 | #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
| 74 | #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
74 | #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
| 75 | #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
75 | #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
| 76 | #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
76 | #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
| 77 | 77 | ||
| 78 | /* |
78 | /* |
| 79 | * These macros are provided to change shape of the 4-level |
79 | * These macros are provided to change shape of the 4-level |
| 80 | * tree of page tables on respective level. |
80 | * tree of page tables on respective level. |
| 81 | */ |
81 | */ |
| 82 | #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
82 | #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
| 83 | #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
83 | #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
| 84 | #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
84 | #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
| 85 | #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
85 | #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
| 86 | 86 | ||
| 87 | /* |
87 | /* |
| 88 | * These macros are provided to query various flags within the page tables. |
88 | * These macros are provided to query various flags within the page tables. |
| 89 | */ |
89 | */ |
| 90 | #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
90 | #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
| 91 | #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
91 | #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
| 92 | #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
92 | #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
| 93 | #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
93 | #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
| 94 | 94 | ||
| 95 | /* |
95 | /* |
| 96 | * These macros are provided to set/clear various flags within the page tables. |
96 | * These macros are provided to set/clear various flags within the page tables. |
| 97 | */ |
97 | */ |
| 98 | #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
98 | #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
| 99 | #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
99 | #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
| 100 | #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
100 | #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
| 101 | #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
101 | #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
| 102 | 102 | ||
| 103 | #define PTE_VALID(p) PTE_VALID_ARCH((p)) |
103 | #define PTE_VALID(p) PTE_VALID_ARCH((p)) |
| 104 | #define PTE_PRESENT(p) PTE_PRESENT_ARCH((p)) |
104 | #define PTE_PRESENT(p) PTE_PRESENT_ARCH((p)) |
| 105 | #define PTE_GET_FRAME(p) PTE_GET_FRAME_ARCH((p)) |
105 | #define PTE_GET_FRAME(p) PTE_GET_FRAME_ARCH((p)) |
| 106 | #define PTE_READABLE(p) 1 |
106 | #define PTE_READABLE(p) 1 |
| 107 | #define PTE_WRITABLE(p) PTE_WRITABLE_ARCH((p)) |
107 | #define PTE_WRITABLE(p) PTE_WRITABLE_ARCH((p)) |
| 108 | #define PTE_EXECUTABLE(p) PTE_EXECUTABLE_ARCH((p)) |
108 | #define PTE_EXECUTABLE(p) PTE_EXECUTABLE_ARCH((p)) |
| 109 | 109 | ||
| 110 | extern page_mapping_operations_t pt_mapping_operations; |
110 | extern page_mapping_operations_t pt_mapping_operations; |
| 111 | 111 | ||
| 112 | extern void page_mapping_insert_pt(as_t *as, __address page, __address frame, int flags); |
112 | extern void page_mapping_insert_pt(as_t *as, uintptr_t page, uintptr_t frame, int flags); |
| 113 | extern pte_t *page_mapping_find_pt(as_t *as, __address page); |
113 | extern pte_t *page_mapping_find_pt(as_t *as, uintptr_t page); |
| 114 | 114 | ||
| 115 | #endif |
115 | #endif |
| 116 | 116 | ||
| 117 | #endif |
117 | #endif |
| 118 | 118 | ||
| 119 | /** @} |
119 | /** @} |
| 120 | */ |
120 | */ |
| 121 | 121 | ||
| 122 | 122 | ||