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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 | /** @addtogroup genericmm |
|
- | 30 | * @{ |
|
- | 31 | */ |
|
- | 32 | ||
29 | /** |
33 | /** |
30 | * @file page.c |
34 | * @file |
31 | * @brief Virtual Address Translation subsystem. |
35 | * @brief Virtual Address Translation subsystem. |
32 | * |
36 | * |
33 | * This file contains code for creating, destroying and searching |
37 | * This file contains code for creating, destroying and searching |
34 | * mappings between virtual addresses and physical addresses. |
38 | * mappings between virtual addresses and physical addresses. |
35 | * Functions here are mere wrappers that call the real implementation. |
39 | * Functions here are mere wrappers that call the real implementation. |
36 | * They however, define the single interface. |
40 | * They however, define the single interface. |
37 | */ |
41 | */ |
38 | 42 | ||
39 | #include <mm/page.h> |
43 | #include <mm/page.h> |
40 | #include <arch/mm/page.h> |
44 | #include <arch/mm/page.h> |
41 | #include <arch/mm/asid.h> |
45 | #include <arch/mm/asid.h> |
42 | #include <mm/as.h> |
46 | #include <mm/as.h> |
43 | #include <mm/frame.h> |
47 | #include <mm/frame.h> |
44 | #include <arch/types.h> |
48 | #include <arch/types.h> |
45 | #include <typedefs.h> |
49 | #include <typedefs.h> |
46 | #include <arch/asm.h> |
50 | #include <arch/asm.h> |
47 | #include <memstr.h> |
51 | #include <memstr.h> |
48 | #include <debug.h> |
52 | #include <debug.h> |
49 | #include <arch.h> |
53 | #include <arch.h> |
50 | 54 | ||
51 | /** Virtual operations for page subsystem. */ |
55 | /** Virtual operations for page subsystem. */ |
52 | page_mapping_operations_t *page_mapping_operations = NULL; |
56 | page_mapping_operations_t *page_mapping_operations = NULL; |
53 | 57 | ||
54 | void page_init(void) |
58 | void page_init(void) |
55 | { |
59 | { |
56 | page_arch_init(); |
60 | page_arch_init(); |
57 | } |
61 | } |
58 | 62 | ||
59 | /** Map memory structure |
63 | /** Map memory structure |
60 | * |
64 | * |
61 | * Identity-map memory structure |
65 | * Identity-map memory structure |
62 | * considering possible crossings |
66 | * considering possible crossings |
63 | * of page boundaries. |
67 | * of page boundaries. |
64 | * |
68 | * |
65 | * @param s Address of the structure. |
69 | * @param s Address of the structure. |
66 | * @param size Size of the structure. |
70 | * @param size Size of the structure. |
67 | */ |
71 | */ |
68 | void map_structure(__address s, size_t size) |
72 | void map_structure(__address s, size_t size) |
69 | { |
73 | { |
70 | int i, cnt, length; |
74 | int i, cnt, length; |
71 | 75 | ||
72 | length = size + (s - (s & ~(PAGE_SIZE - 1))); |
76 | length = size + (s - (s & ~(PAGE_SIZE - 1))); |
73 | cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0); |
77 | cnt = length / PAGE_SIZE + (length % PAGE_SIZE > 0); |
74 | 78 | ||
75 | for (i = 0; i < cnt; i++) |
79 | for (i = 0; i < cnt; i++) |
76 | page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE); |
80 | page_mapping_insert(AS_KERNEL, s + i * PAGE_SIZE, s + i * PAGE_SIZE, PAGE_NOT_CACHEABLE); |
77 | 81 | ||
78 | } |
82 | } |
79 | 83 | ||
80 | /** Insert mapping of page to frame. |
84 | /** Insert mapping of page to frame. |
81 | * |
85 | * |
82 | * Map virtual address page to physical address frame |
86 | * Map virtual address page to physical address frame |
83 | * using flags. Allocate and setup any missing page tables. |
87 | * using flags. Allocate and setup any missing page tables. |
84 | * |
88 | * |
85 | * The page table must be locked and interrupts must be disabled. |
89 | * The page table must be locked and interrupts must be disabled. |
86 | * |
90 | * |
87 | * @param as Address space to wich page belongs. |
91 | * @param as Address space to wich page belongs. |
88 | * @param page Virtual address of the page to be mapped. |
92 | * @param page Virtual address of the page to be mapped. |
89 | * @param frame Physical address of memory frame to which the mapping is done. |
93 | * @param frame Physical address of memory frame to which the mapping is done. |
90 | * @param flags Flags to be used for mapping. |
94 | * @param flags Flags to be used for mapping. |
91 | */ |
95 | */ |
92 | void page_mapping_insert(as_t *as, __address page, __address frame, int flags) |
96 | void page_mapping_insert(as_t *as, __address page, __address frame, int flags) |
93 | { |
97 | { |
94 | ASSERT(page_mapping_operations); |
98 | ASSERT(page_mapping_operations); |
95 | ASSERT(page_mapping_operations->mapping_insert); |
99 | ASSERT(page_mapping_operations->mapping_insert); |
96 | 100 | ||
97 | page_mapping_operations->mapping_insert(as, page, frame, flags); |
101 | page_mapping_operations->mapping_insert(as, page, frame, flags); |
98 | } |
102 | } |
99 | 103 | ||
100 | /** Remove mapping of page. |
104 | /** Remove mapping of page. |
101 | * |
105 | * |
102 | * Remove any mapping of page within address space as. |
106 | * Remove any mapping of page within address space as. |
103 | * TLB shootdown should follow in order to make effects of |
107 | * TLB shootdown should follow in order to make effects of |
104 | * this call visible. |
108 | * this call visible. |
105 | * |
109 | * |
106 | * The page table must be locked and interrupts must be disabled. |
110 | * The page table must be locked and interrupts must be disabled. |
107 | * |
111 | * |
108 | * @param as Address space to wich page belongs. |
112 | * @param as Address space to wich page belongs. |
109 | * @param page Virtual address of the page to be demapped. |
113 | * @param page Virtual address of the page to be demapped. |
110 | */ |
114 | */ |
111 | void page_mapping_remove(as_t *as, __address page) |
115 | void page_mapping_remove(as_t *as, __address page) |
112 | { |
116 | { |
113 | ASSERT(page_mapping_operations); |
117 | ASSERT(page_mapping_operations); |
114 | ASSERT(page_mapping_operations->mapping_remove); |
118 | ASSERT(page_mapping_operations->mapping_remove); |
115 | 119 | ||
116 | page_mapping_operations->mapping_remove(as, page); |
120 | page_mapping_operations->mapping_remove(as, page); |
117 | } |
121 | } |
118 | 122 | ||
119 | /** Find mapping for virtual page |
123 | /** Find mapping for virtual page |
120 | * |
124 | * |
121 | * Find mapping for virtual page. |
125 | * Find mapping for virtual page. |
122 | * |
126 | * |
123 | * The page table must be locked and interrupts must be disabled. |
127 | * The page table must be locked and interrupts must be disabled. |
124 | * |
128 | * |
125 | * @param as Address space to wich page belongs. |
129 | * @param as Address space to wich page belongs. |
126 | * @param page Virtual page. |
130 | * @param page Virtual page. |
127 | * |
131 | * |
128 | * @return NULL if there is no such mapping; requested mapping otherwise. |
132 | * @return NULL if there is no such mapping; requested mapping otherwise. |
129 | */ |
133 | */ |
130 | pte_t *page_mapping_find(as_t *as, __address page) |
134 | pte_t *page_mapping_find(as_t *as, __address page) |
131 | { |
135 | { |
132 | ASSERT(page_mapping_operations); |
136 | ASSERT(page_mapping_operations); |
133 | ASSERT(page_mapping_operations->mapping_find); |
137 | ASSERT(page_mapping_operations->mapping_find); |
134 | 138 | ||
135 | return page_mapping_operations->mapping_find(as, page); |
139 | return page_mapping_operations->mapping_find(as, page); |
136 | } |
140 | } |
- | 141 | ||
- | 142 | /** @} |
|
- | 143 | */ |
|
- | 144 | ||
137 | 145 |