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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/as_ht.h> |
29 | #include <genarch/mm/as_ht.h> |
| 30 | #include <genarch/mm/page_ht.h> |
30 | #include <genarch/mm/page_ht.h> |
| 31 | #include <mm/as.h> |
31 | #include <mm/as.h> |
| 32 | #include <mm/frame.h> |
32 | #include <mm/frame.h> |
| 33 | #include <arch/types.h> |
33 | #include <arch/types.h> |
| 34 | #include <typedefs.h> |
34 | #include <typedefs.h> |
| 35 | #include <memstr.h> |
35 | #include <memstr.h> |
| 36 | #include <adt/hash_table.h> |
36 | #include <adt/hash_table.h> |
| - | 37 | #include <synch/spinlock.h> |
|
| 37 | 38 | ||
| 38 | static pte_t *ht_create(int flags); |
39 | static pte_t *ht_create(int flags); |
| 39 | 40 | ||
| - | 41 | static void ht_lock(as_t *as, bool lock); |
|
| - | 42 | static void ht_unlock(as_t *as, bool unlock); |
|
| - | 43 | ||
| 40 | as_operations_t as_ht_operations = { |
44 | as_operations_t as_ht_operations = { |
| 41 | .page_table_create = ht_create |
45 | .page_table_create = ht_create, |
| - | 46 | .page_table_lock = ht_lock, |
|
| - | 47 | .page_table_unlock = ht_unlock, |
|
| 42 | }; |
48 | }; |
| 43 | 49 | ||
| 44 | 50 | ||
| 45 | /** Page hash table create. |
51 | /** Page hash table create. |
| 46 | * |
52 | * |
| 47 | * The page hash table will be created only once |
53 | * The page hash table will be created only once |
| 48 | * and will be shared by all address spaces. |
54 | * and will be shared by all address spaces. |
| 49 | * |
55 | * |
| 50 | * @param flags Ignored. |
56 | * @param flags Ignored. |
| 51 | * |
57 | * |
| 52 | * @return Returns NULL. |
58 | * @return Returns NULL. |
| 53 | */ |
59 | */ |
| 54 | pte_t *ht_create(int flags) |
60 | pte_t *ht_create(int flags) |
| 55 | { |
61 | { |
| 56 | if (flags & FLAG_AS_KERNEL) { |
62 | if (flags & FLAG_AS_KERNEL) { |
| 57 | hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations); |
63 | hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations); |
| 58 | } |
64 | } |
| 59 | return NULL; |
65 | return NULL; |
| 60 | } |
66 | } |
| - | 67 | ||
| - | 68 | /** Lock page table. |
|
| - | 69 | * |
|
| - | 70 | * Lock address space and page hash table. |
|
| - | 71 | * Interrupts must be disabled. |
|
| - | 72 | * |
|
| - | 73 | * @param as Address space. |
|
| - | 74 | * @param lock If false, do not attempt to lock the address space. |
|
| - | 75 | */ |
|
| - | 76 | void ht_lock(as_t *as, bool lock) |
|
| - | 77 | { |
|
| - | 78 | if (lock) |
|
| - | 79 | spinlock_lock(&as->lock); |
|
| - | 80 | spinlock_lock(&page_ht_lock); |
|
| - | 81 | } |
|
| - | 82 | ||
| - | 83 | /** Unlock page table. |
|
| - | 84 | * |
|
| - | 85 | * Unlock address space and page hash table. |
|
| - | 86 | * Interrupts must be disabled. |
|
| - | 87 | * |
|
| - | 88 | * @param as Address space. |
|
| - | 89 | * @param unlock If false, do not attempt to lock the address space. |
|
| - | 90 | */ |
|
| - | 91 | void ht_unlock(as_t *as, bool unlock) |
|
| - | 92 | { |
|
| - | 93 | spinlock_unlock(&page_ht_lock); |
|
| - | 94 | if (unlock) |
|
| - | 95 | spinlock_unlock(&as->lock); |
|
| - | 96 | } |
|
| 61 | 97 | ||