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