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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 | ||