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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2006 Jakub Jermar |
2 | * Copyright (C) 2001-2006 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 | /* |
29 | /* |
30 | * Virtual Address Translation subsystem. |
30 | * Virtual Address Translation subsystem. |
31 | */ |
31 | */ |
32 | 32 | ||
33 | #include <mm/page.h> |
33 | #include <mm/page.h> |
34 | #include <arch/mm/page.h> |
34 | #include <arch/mm/page.h> |
35 | #include <arch/mm/asid.h> |
35 | #include <arch/mm/asid.h> |
36 | #include <mm/as.h> |
36 | #include <mm/as.h> |
37 | #include <mm/frame.h> |
37 | #include <mm/frame.h> |
38 | #include <arch/types.h> |
38 | #include <arch/types.h> |
39 | #include <typedefs.h> |
39 | #include <typedefs.h> |
40 | #include <arch/asm.h> |
40 | #include <arch/asm.h> |
41 | #include <memstr.h> |
41 | #include <memstr.h> |
42 | #include <debug.h> |
42 | #include <debug.h> |
43 | #include <arch.h> |
43 | #include <arch.h> |
44 | 44 | ||
45 | /** Virtual operations for page subsystem. */ |
45 | /** Virtual operations for page subsystem. */ |
46 | page_mapping_operations_t *page_mapping_operations = NULL; |
46 | page_mapping_operations_t *page_mapping_operations = NULL; |
47 | 47 | ||
48 | void page_init(void) |
48 | void page_init(void) |
49 | { |
49 | { |
50 | page_arch_init(); |
50 | page_arch_init(); |
51 | } |
51 | } |
52 | 52 | ||
53 | /** Map memory structure |
53 | /** Map memory structure |
54 | * |
54 | * |
55 | * Identity-map memory structure |
55 | * Identity-map memory structure |
56 | * considering possible crossings |
56 | * considering possible crossings |
57 | * of page boundaries. |
57 | * of page boundaries. |
58 | * |
58 | * |
59 | * @param s Address of the structure. |
59 | * @param s Address of the structure. |
60 | * @param size Size of the structure. |
60 | * @param size Size of the structure. |
61 | */ |
61 | */ |
62 | void map_structure(__address s, size_t size) |
62 | void map_structure(__address s, size_t size) |
63 | { |
63 | { |
64 | int i, cnt, length; |
64 | int i, cnt, length; |
65 | 65 | ||
66 | length = size + (s - (s & ~(PAGE_SIZE-1))); |
66 | length = size + (s - (s & ~(PAGE_SIZE-1))); |
67 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
67 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
68 | 68 | ||
69 | for (i = 0; i < cnt; i++) |
69 | for (i = 0; i < cnt; i++) |
70 | page_mapping_insert(AS_KERNEL, s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE); |
70 | page_mapping_insert(AS_KERNEL, s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE); |
71 | 71 | ||
72 | } |
72 | } |
73 | 73 | ||
74 | /** Map page to frame |
74 | /** Insert mapping of page to frame. |
75 | * |
75 | * |
76 | * Map virtual address 'page' to physical address 'frame' |
76 | * Map virtual address 'page' to physical address 'frame' |
77 | * using 'flags'. Allocate and setup any missing page tables. |
77 | * using 'flags'. Allocate and setup any missing page tables. |
78 | * |
78 | * |
79 | * The address space must be locked and interrupts must be disabled. |
79 | * The address space must be locked and interrupts must be disabled. |
80 | * |
80 | * |
81 | * @param as Address space to wich page belongs.. |
81 | * @param as Address space to wich page belongs. |
82 | * @param page Virtual address of the page to be mapped. |
82 | * @param page Virtual address of the page to be mapped. |
83 | * @param frame Physical address of memory frame to which the mapping is done. |
83 | * @param frame Physical address of memory frame to which the mapping is done. |
84 | * @param flags Flags to be used for mapping. |
84 | * @param flags Flags to be used for mapping. |
85 | */ |
85 | */ |
86 | void page_mapping_insert(as_t *as, __address page, __address frame, int flags) |
86 | void page_mapping_insert(as_t *as, __address page, __address frame, int flags) |
87 | { |
87 | { |
88 | ASSERT(page_mapping_operations); |
88 | ASSERT(page_mapping_operations); |
89 | ASSERT(page_mapping_operations->mapping_insert); |
89 | ASSERT(page_mapping_operations->mapping_insert); |
90 | 90 | ||
91 | page_mapping_operations->mapping_insert(as, page, frame, flags); |
91 | page_mapping_operations->mapping_insert(as, page, frame, flags); |
92 | } |
92 | } |
- | 93 | ||
- | 94 | /** Remove mapping of page. |
|
- | 95 | * |
|
- | 96 | * Remove any mapping of 'page' within address space 'as'. |
|
- | 97 | * TLB shootdown should follow in order to make effects of |
|
- | 98 | * this call visible. |
|
- | 99 | * |
|
- | 100 | * The address space must be locked and interrupts must be disabled. |
|
- | 101 | * |
|
- | 102 | * @param as Address space to wich page belongs. |
|
- | 103 | * @param page Virtual address of the page to be demapped. |
|
- | 104 | */ |
|
- | 105 | void page_mapping_remove(as_t *as, __address page) |
|
- | 106 | { |
|
- | 107 | ASSERT(page_mapping_operations); |
|
- | 108 | ASSERT(page_mapping_operations->mapping_remove); |
|
- | 109 | ||
- | 110 | page_mapping_operations->mapping_remove(as, page); |
|
- | 111 | } |
|
93 | 112 | ||
94 | /** Find mapping for virtual page |
113 | /** Find mapping for virtual page |
95 | * |
114 | * |
96 | * Find mapping for virtual page. |
115 | * Find mapping for virtual page. |
97 | * |
116 | * |
98 | * The address space must be locked and interrupts must be disabled. |
117 | * The address space must be locked and interrupts must be disabled. |
99 | * |
118 | * |
100 | * @param as Address space to wich page belongs. |
119 | * @param as Address space to wich page belongs. |
101 | * @param page Virtual page. |
120 | * @param page Virtual page. |
102 | * |
121 | * |
103 | * @return NULL if there is no such mapping; requested mapping otherwise. |
122 | * @return NULL if there is no such mapping; requested mapping otherwise. |
104 | */ |
123 | */ |
105 | pte_t *page_mapping_find(as_t *as, __address page) |
124 | pte_t *page_mapping_find(as_t *as, __address page) |
106 | { |
125 | { |
107 | ASSERT(page_mapping_operations); |
126 | ASSERT(page_mapping_operations); |
108 | ASSERT(page_mapping_operations->mapping_find); |
127 | ASSERT(page_mapping_operations->mapping_find); |
109 | 128 | ||
110 | return page_mapping_operations->mapping_find(as, page); |
129 | return page_mapping_operations->mapping_find(as, page); |
111 | } |
130 | } |
112 | 131 |