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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 | ||
- | 29 | /** |
|
- | 30 | * @file as_ht.c |
|
- | 31 | * @brief Address space functions for global page hash table. |
|
- | 32 | */ |
|
28 | 33 | ||
29 | #include <genarch/mm/as_ht.h> |
34 | #include <genarch/mm/as_ht.h> |
30 | #include <genarch/mm/page_ht.h> |
35 | #include <genarch/mm/page_ht.h> |
31 | #include <mm/as.h> |
36 | #include <mm/as.h> |
32 | #include <mm/frame.h> |
37 | #include <mm/frame.h> |
33 | #include <arch/types.h> |
38 | #include <arch/types.h> |
34 | #include <typedefs.h> |
39 | #include <typedefs.h> |
35 | #include <memstr.h> |
40 | #include <memstr.h> |
36 | #include <adt/hash_table.h> |
41 | #include <adt/hash_table.h> |
37 | #include <synch/spinlock.h> |
42 | #include <synch/spinlock.h> |
38 | 43 | ||
39 | static pte_t *ht_create(int flags); |
44 | static pte_t *ht_create(int flags); |
40 | 45 | ||
41 | static void ht_lock(as_t *as, bool lock); |
46 | static void ht_lock(as_t *as, bool lock); |
42 | static void ht_unlock(as_t *as, bool unlock); |
47 | static void ht_unlock(as_t *as, bool unlock); |
43 | 48 | ||
44 | as_operations_t as_ht_operations = { |
49 | as_operations_t as_ht_operations = { |
45 | .page_table_create = ht_create, |
50 | .page_table_create = ht_create, |
46 | .page_table_lock = ht_lock, |
51 | .page_table_lock = ht_lock, |
47 | .page_table_unlock = ht_unlock, |
52 | .page_table_unlock = ht_unlock, |
48 | }; |
53 | }; |
49 | 54 | ||
50 | 55 | ||
51 | /** Page hash table create. |
56 | /** Page hash table create. |
52 | * |
57 | * |
53 | * The page hash table will be created only once |
58 | * The page hash table will be created only once |
54 | * and will be shared by all address spaces. |
59 | * and will be shared by all address spaces. |
55 | * |
60 | * |
56 | * @param flags Ignored. |
61 | * @param flags Ignored. |
57 | * |
62 | * |
58 | * @return Returns NULL. |
63 | * @return Returns NULL. |
59 | */ |
64 | */ |
60 | pte_t *ht_create(int flags) |
65 | pte_t *ht_create(int flags) |
61 | { |
66 | { |
62 | if (flags & FLAG_AS_KERNEL) { |
67 | if (flags & FLAG_AS_KERNEL) { |
63 | hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations); |
68 | hash_table_create(&page_ht, PAGE_HT_ENTRIES, 2, &ht_operations); |
64 | } |
69 | } |
65 | return NULL; |
70 | return NULL; |
66 | } |
71 | } |
67 | 72 | ||
68 | /** Lock page table. |
73 | /** Lock page table. |
69 | * |
74 | * |
70 | * Lock address space and page hash table. |
75 | * Lock address space and page hash table. |
71 | * Interrupts must be disabled. |
76 | * Interrupts must be disabled. |
72 | * |
77 | * |
73 | * @param as Address space. |
78 | * @param as Address space. |
74 | * @param lock If false, do not attempt to lock the address space. |
79 | * @param lock If false, do not attempt to lock the address space. |
75 | */ |
80 | */ |
76 | void ht_lock(as_t *as, bool lock) |
81 | void ht_lock(as_t *as, bool lock) |
77 | { |
82 | { |
78 | if (lock) |
83 | if (lock) |
79 | spinlock_lock(&as->lock); |
84 | spinlock_lock(&as->lock); |
80 | spinlock_lock(&page_ht_lock); |
85 | spinlock_lock(&page_ht_lock); |
81 | } |
86 | } |
82 | 87 | ||
83 | /** Unlock page table. |
88 | /** Unlock page table. |
84 | * |
89 | * |
85 | * Unlock address space and page hash table. |
90 | * Unlock address space and page hash table. |
86 | * Interrupts must be disabled. |
91 | * Interrupts must be disabled. |
87 | * |
92 | * |
88 | * @param as Address space. |
93 | * @param as Address space. |
89 | * @param unlock If false, do not attempt to lock the address space. |
94 | * @param unlock If false, do not attempt to lock the address space. |
90 | */ |
95 | */ |
91 | void ht_unlock(as_t *as, bool unlock) |
96 | void ht_unlock(as_t *as, bool unlock) |
92 | { |
97 | { |
93 | spinlock_unlock(&page_ht_lock); |
98 | spinlock_unlock(&page_ht_lock); |
94 | if (unlock) |
99 | if (unlock) |
95 | spinlock_unlock(&as->lock); |
100 | spinlock_unlock(&as->lock); |
96 | } |
101 | } |
97 | 102 |