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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 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 | ||
- | 29 | /* |
|
- | 30 | * Virtual Address Translation subsystem. |
|
- | 31 | */ |
|
28 | 32 | ||
29 | #include <mm/page.h> |
33 | #include <mm/page.h> |
30 | #include <arch/mm/page.h> |
34 | #include <arch/mm/page.h> |
31 | #include <arch/mm/asid.h> |
35 | #include <arch/mm/asid.h> |
32 | #include <mm/asid.h> |
36 | #include <mm/asid.h> |
33 | #include <mm/frame.h> |
37 | #include <mm/frame.h> |
34 | #include <arch/types.h> |
38 | #include <arch/types.h> |
35 | #include <typedefs.h> |
39 | #include <typedefs.h> |
36 | #include <arch/asm.h> |
40 | #include <arch/asm.h> |
37 | #include <memstr.h> |
41 | #include <memstr.h> |
38 | #include <debug.h> |
42 | #include <debug.h> |
39 | #include <arch.h> |
43 | #include <arch.h> |
40 | 44 | ||
41 | /** Virtual operations for page subsystem. */ |
45 | /** Virtual operations for page subsystem. */ |
42 | page_operations_t *page_operations = NULL; |
46 | page_operations_t *page_operations = NULL; |
43 | 47 | ||
44 | void page_init(void) |
48 | void page_init(void) |
45 | { |
49 | { |
46 | page_arch_init(); |
50 | page_arch_init(); |
47 | page_mapping_insert(0x0, 0, 0x0, PAGE_NOT_PRESENT, 0); |
51 | page_mapping_insert(0x0, 0, 0x0, PAGE_NOT_PRESENT, 0); |
48 | } |
52 | } |
49 | 53 | ||
50 | /** Map memory structure |
54 | /** Map memory structure |
51 | * |
55 | * |
52 | * Identity-map memory structure |
56 | * Identity-map memory structure |
53 | * considering possible crossings |
57 | * considering possible crossings |
54 | * of page boundaries. |
58 | * of page boundaries. |
55 | * |
59 | * |
56 | * @param s Address of the structure. |
60 | * @param s Address of the structure. |
57 | * @param size Size of the structure. |
61 | * @param size Size of the structure. |
58 | */ |
62 | */ |
59 | void map_structure(__address s, size_t size) |
63 | void map_structure(__address s, size_t size) |
60 | { |
64 | { |
61 | int i, cnt, length; |
65 | int i, cnt, length; |
62 | 66 | ||
63 | length = size + (s - (s & ~(PAGE_SIZE-1))); |
67 | length = size + (s - (s & ~(PAGE_SIZE-1))); |
64 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
68 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
65 | 69 | ||
66 | for (i = 0; i < cnt; i++) |
70 | for (i = 0; i < cnt; i++) |
67 | page_mapping_insert(s + i*PAGE_SIZE, ASID_KERNEL, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
71 | page_mapping_insert(s + i*PAGE_SIZE, ASID_KERNEL, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
68 | 72 | ||
69 | } |
73 | } |
70 | 74 | ||
71 | /** Map page to frame |
75 | /** Map page to frame |
72 | * |
76 | * |
73 | * Map virtual address 'page' to physical address 'frame' |
77 | * Map virtual address 'page' to physical address 'frame' |
74 | * using 'flags'. Allocate and setup any missing page tables. |
78 | * using 'flags'. Allocate and setup any missing page tables. |
75 | * |
79 | * |
76 | * @param page Virtual address of the page to be mapped. |
80 | * @param page Virtual address of the page to be mapped. |
77 | * @param asid Address space to wich page belongs. |
81 | * @param asid Address space to wich page belongs. |
78 | * @param frame Physical address of memory frame to which the mapping is done. |
82 | * @param frame Physical address of memory frame to which the mapping is done. |
79 | * @param flags Flags to be used for mapping. |
83 | * @param flags Flags to be used for mapping. |
80 | * @param root Explicit PTL0 address. |
84 | * @param root Explicit PTL0 address. |
81 | */ |
85 | */ |
82 | void page_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root) |
86 | void page_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root) |
83 | { |
87 | { |
84 | ASSERT(page_operations); |
88 | ASSERT(page_operations); |
85 | ASSERT(page_operations->mapping_insert); |
89 | ASSERT(page_operations->mapping_insert); |
86 | 90 | ||
87 | page_operations->mapping_insert(page, asid, frame, flags, root); |
91 | page_operations->mapping_insert(page, asid, frame, flags, root); |
88 | } |
92 | } |
89 | 93 | ||
90 | /** Find mapping for virtual page |
94 | /** Find mapping for virtual page |
91 | * |
95 | * |
92 | * Find mapping for virtual page. |
96 | * Find mapping for virtual page. |
93 | * |
97 | * |
94 | * @param page Virtual page. |
98 | * @param page Virtual page. |
95 | * @param asid Address space to wich page belongs. |
99 | * @param asid Address space to wich page belongs. |
96 | * @param root PTL0 address if non-zero. |
100 | * @param root PTL0 address if non-zero. |
97 | * |
101 | * |
98 | * @return NULL if there is no such mapping; requested mapping otherwise. |
102 | * @return NULL if there is no such mapping; requested mapping otherwise. |
99 | */ |
103 | */ |
100 | pte_t *page_mapping_find(__address page, asid_t asid, __address root) |
104 | pte_t *page_mapping_find(__address page, asid_t asid, __address root) |
101 | { |
105 | { |
102 | ASSERT(page_operations); |
106 | ASSERT(page_operations); |
103 | ASSERT(page_operations->mapping_find); |
107 | ASSERT(page_operations->mapping_find); |
104 | 108 | ||
105 | return page_operations->mapping_find(page, asid, root); |
109 | return page_operations->mapping_find(page, asid, root); |
106 | } |
110 | } |
107 | 111 |