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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 | #include <genarch/mm/page_ht.h> |
29 | #include <genarch/mm/page_ht.h> |
30 | #include <mm/page.h> |
30 | #include <mm/page.h> |
31 | #include <mm/frame.h> |
31 | #include <mm/frame.h> |
- | 32 | #include <mm/heap.h> |
|
32 | #include <arch/mm/asid.h> |
33 | #include <arch/mm/asid.h> |
33 | #include <arch/types.h> |
34 | #include <arch/types.h> |
34 | #include <typedefs.h> |
35 | #include <typedefs.h> |
35 | #include <arch/asm.h> |
36 | #include <arch/asm.h> |
- | 37 | #include <debug.h> |
|
36 | 38 | ||
37 | static void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root); |
39 | static void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root); |
38 | static pte_t *ht_mapping_find(__address page, asid_t asid, __address root); |
40 | static pte_t *ht_mapping_find(__address page, asid_t asid, __address root); |
39 | 41 | ||
40 | page_operations_t page_ht_operations = { |
42 | page_operations_t page_ht_operations = { |
41 | .mapping_insert = ht_mapping_insert, |
43 | .mapping_insert = ht_mapping_insert, |
42 | .mapping_find = ht_mapping_find |
44 | .mapping_find = ht_mapping_find |
43 | }; |
45 | }; |
44 | 46 | ||
45 | /** Map page to frame using page hash table. |
47 | /** Map page to frame using page hash table. |
46 | * |
48 | * |
47 | * Map virtual address 'page' to physical address 'frame' |
49 | * Map virtual address 'page' to physical address 'frame' |
48 | * using 'flags'. |
50 | * using 'flags'. |
49 | * |
51 | * |
50 | * @param page Virtual address of the page to be mapped. |
52 | * @param page Virtual address of the page to be mapped. |
51 | * @param asid Address space to which page belongs. |
53 | * @param asid Address space to which page belongs. |
52 | * @param frame Physical address of memory frame to which the mapping is done. |
54 | * @param frame Physical address of memory frame to which the mapping is done. |
53 | * @param flags Flags to be used for mapping. |
55 | * @param flags Flags to be used for mapping. |
54 | * @param root Explicit PTL0 address. |
56 | * @param root Ignored. |
55 | */ |
57 | */ |
56 | void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root) |
58 | void ht_mapping_insert(__address page, asid_t asid, __address frame, int flags, __address root) |
57 | { |
59 | { |
- | 60 | pte_t *t, *u = NULL; |
|
- | 61 | ||
- | 62 | t = HT_HASH(page, asid); |
|
- | 63 | if (!HT_SLOT_EMPTY(t)) { |
|
- | 64 | u = (pte_t *) malloc(sizeof(pte_t)); /* FIXME: use slab allocator for this */ |
|
- | 65 | if (!u) |
|
- | 66 | panic("could not allocate memory for hash table\n"); |
|
- | 67 | *u = *t; |
|
- | 68 | } |
|
- | 69 | HT_SET_NEXT(t, u); |
|
- | 70 | HT_SET_RECORD(t, page, asid, frame, flags); |
|
58 | } |
71 | } |
59 | 72 | ||
60 | /** Find mapping for virtual page in page hash table. |
73 | /** Find mapping for virtual page in page hash table. |
61 | * |
74 | * |
62 | * Find mapping for virtual page. |
75 | * Find mapping for virtual page. |
63 | * |
76 | * |
64 | * @param page Virtual page. |
77 | * @param page Virtual page. |
65 | * @param asid Address space to wich page belongs. |
78 | * @param asid Address space to wich page belongs. |
66 | * @param root PTL0 address if non-zero. |
79 | * @param root Ignored. |
67 | * |
80 | * |
68 | * @return NULL if there is no such mapping; entry from PTL3 describing the mapping otherwise. |
81 | * @return NULL if there is no such mapping; requested mapping otherwise. |
69 | */ |
82 | */ |
70 | pte_t *ht_mapping_find(__address page, asid_t asid, __address root) |
83 | pte_t *ht_mapping_find(__address page, asid_t asid, __address root) |
71 | { |
84 | { |
72 | return NULL; |
85 | pte_t *t; |
- | 86 | ||
- | 87 | t = HT_HASH(page, asid); |
|
- | 88 | while (!HT_COMPARE(page, asid, t) && HT_GET_NEXT(t)) |
|
- | 89 | t = HT_GET_NEXT(t); |
|
- | 90 | ||
- | 91 | return HT_COMPARE(page, asid, t) ? t : NULL; |
|
73 | } |
92 | } |
74 | 93 |