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| 684 | jermar | 1 | /* |
| 2 | * Copyright (C) 2006 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /* |
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| 30 | * This is the generic page hash table interface. |
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| 31 | */ |
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| 32 | |||
| 33 | #ifndef __PAGE_HT_H__ |
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| 34 | #define __PAGE_HT_H__ |
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| 35 | |||
| 36 | #include <mm/page.h> |
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| 746 | jermar | 37 | #include <typedefs.h> |
| 792 | jermar | 38 | #include <arch/types.h> |
| 39 | #include <adt/list.h> |
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| 40 | #include <adt/hash_table.h> |
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| 684 | jermar | 41 | |
| 792 | jermar | 42 | #define PAGE_HT_KEYS 2 |
| 43 | #define KEY_AS 0 |
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| 44 | #define KEY_PAGE 1 |
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| 746 | jermar | 45 | |
| 792 | jermar | 46 | #define PAGE_HT_ENTRIES_BITS 13 |
| 47 | #define PAGE_HT_ENTRIES (1<<PAGE_HT_ENTRIES_BITS) |
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| 699 | jermar | 48 | |
| 792 | jermar | 49 | struct pte { |
| 50 | link_t link; /**< Page hash table link. */ |
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| 51 | as_t *as; /**< Address space. */ |
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| 52 | __address page; /**< Virtual memory page. */ |
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| 53 | __address frame; /**< Physical memory frame. */ |
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| 54 | int flags; |
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| 55 | unsigned a : 1; /**< Accessed. */ |
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| 56 | unsigned d : 1; /**< Dirty. */ |
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| 57 | unsigned p : 1; /**< Present. */ |
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| 58 | }; |
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| 699 | jermar | 59 | |
| 793 | jermar | 60 | extern page_mapping_operations_t ht_mapping_operations; |
| 746 | jermar | 61 | extern spinlock_t page_ht_lock; |
| 792 | jermar | 62 | extern hash_table_t page_ht; |
| 63 | extern hash_table_operations_t ht_operations; |
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| 746 | jermar | 64 | |
| 684 | jermar | 65 | #endif |