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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 | 36 | ||
37 | static pte_t *ht_create(int flags); |
37 | static pte_t *ht_create(int flags); |
38 | 38 | ||
39 | as_operations_t as_ht_operations = { |
39 | as_operations_t as_ht_operations = { |
40 | .page_table_create = ht_create |
40 | .page_table_create = ht_create |
41 | }; |
41 | }; |
42 | 42 | ||
43 | 43 | ||
44 | /** Page hash table create. |
44 | /** Page hash table create. |
45 | * |
45 | * |
46 | * The page hash table will be created only once |
46 | * The page hash table will be created only once |
47 | * and will be shared by all address spaces. |
47 | * and will be shared by all address spaces. |
48 | * |
48 | * |
49 | * @param flags Ignored. |
49 | * @param flags Ignored. |
50 | * |
50 | * |
51 | * @return Address of global page hash table. |
51 | * @return Address of global page hash table. |
52 | */ |
52 | */ |
53 | pte_t *ht_create(int flags) |
53 | pte_t *ht_create(int flags) |
54 | { |
54 | { |
55 | if (!page_ht) { |
55 | if (!page_ht) { |
56 | page_ht = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC, HT_WIDTH - FRAME_WIDTH, NULL); |
56 | page_ht = (pte_t *) frame_alloc(FRAME_KA | FRAME_PANIC, HT_WIDTH - FRAME_WIDTH, NULL, NULL); |
57 | memsetb((__address) page_ht, HT_SIZE, 0); |
57 | memsetb((__address) page_ht, HT_SIZE, 0); |
58 | } |
58 | } |
59 | return page_ht; |
59 | return page_ht; |
60 | } |
60 | } |
61 | 61 |