| 1 | /*
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| 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 |
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| 29 | /*
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| 30 | * This is the generic page hash table interface.
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| 31 | */
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| 32 |
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| 33 | #ifndef __PAGE_HT_H__
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| 34 | #define __PAGE_HT_H__
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| 35 |
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| 36 | #include <mm/page.h>
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| 37 | #include <typedefs.h>
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| 38 | #include <arch/types.h>
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| 39 | #include <adt/list.h>
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| 40 | #include <adt/hash_table.h>
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| 41 |
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| 42 | #define PAGE_HT_KEYS 2
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| 43 | #define KEY_AS 0
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| 44 | #define KEY_PAGE 1
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| 45 |
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| 46 | #define PAGE_HT_ENTRIES_BITS 13
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| 47 | #define PAGE_HT_ENTRIES (1<<PAGE_HT_ENTRIES_BITS)
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| 48 |
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| 49 | #define PTE_VALID_ARCH(pte) ((pte) != NULL)
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| 50 | #define PTE_PRESENT_ARCH(pte) ((pte)->p != 0)
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| 51 | #define PTE_GET_FRAME_ARCH(pte) ((pte)->frame)
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| 52 |
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| 53 | struct pte {
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| 54 | link_t link; /**< Page hash table link. */
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| 55 | as_t *as; /**< Address space. */
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| 56 | __address page; /**< Virtual memory page. */
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| 57 | __address frame; /**< Physical memory frame. */
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| 58 | unsigned g : 1; /**< Global page. */
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| 59 | unsigned x : 1; /**< Execute. */
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| 60 | unsigned w : 1; /**< Writable. */
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| 61 | unsigned k : 1; /**< Kernel privileges required. */
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| 62 | unsigned c : 1; /**< Cacheable. */
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| 63 | unsigned a : 1; /**< Accessed. */
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| 64 | unsigned d : 1; /**< Dirty. */
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| 65 | unsigned p : 1; /**< Present. */
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| 66 | };
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| 67 |
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| 68 | extern page_mapping_operations_t ht_mapping_operations;
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| 69 | extern spinlock_t page_ht_lock;
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| 70 | extern hash_table_t page_ht;
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| 71 | extern hash_table_operations_t ht_operations;
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| 72 |
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| 73 | #endif
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