| 1 | /*
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| 2 | * Copyright (C) 2001-2004 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 | #ifndef __PAGE_H__
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| 30 | #define __PAGE_H__
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| 31 |
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| 32 | #include <arch/types.h>
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| 33 | #include <typedefs.h>
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| 34 |
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| 35 | #define PAGE_CACHEABLE_SHIFT 0
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| 36 | #define PAGE_NOT_CACHEABLE_SHIFT PAGE_CACHEABLE_SHIFT
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| 37 | #define PAGE_PRESENT_SHIFT 1
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| 38 | #define PAGE_NOT_PRESENT_SHIFT PAGE_PRESENT_SHIFT
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| 39 | #define PAGE_USER_SHIFT 2
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| 40 | #define PAGE_KERNEL_SHIFT PAGE_USER_SHIFT
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| 41 | #define PAGE_READ_SHIFT 3
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| 42 | #define PAGE_WRITE_SHIFT 4
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| 43 | #define PAGE_EXEC_SHIFT 5
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| 44 |
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| 45 | #define PAGE_NOT_CACHEABLE (0<<PAGE_CACHEABLE_SHIFT)
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| 46 | #define PAGE_CACHEABLE (1<<PAGE_CACHEABLE_SHIFT)
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| 47 |
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| 48 | #define PAGE_PRESENT (0<<PAGE_PRESENT_SHIFT)
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| 49 | #define PAGE_NOT_PRESENT (1<<PAGE_PRESENT_SHIFT)
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| 50 |
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| 51 | #define PAGE_USER (1<<PAGE_USER_SHIFT)
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| 52 | #define PAGE_KERNEL (0<<PAGE_USER_SHIFT)
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| 53 |
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| 54 | #define PAGE_READ (1<<PAGE_READ_SHIFT)
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| 55 | #define PAGE_WRITE (1<<PAGE_WRITE_SHIFT)
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| 56 | #define PAGE_EXEC (1<<PAGE_EXEC_SHIFT)
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| 57 |
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| 58 | struct page_operations {
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| 59 | void (* mapping_insert)(__address page, __address frame, int flags, __address root);
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| 60 | pte_t *(* mapping_find)(__address page, __address root);
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| 61 | };
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| 62 | typedef struct page_operations page_operations_t;
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| 63 |
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| 64 | extern page_operations_t *page_operations;
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| 65 |
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| 66 | extern void page_init(void);
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| 67 | extern void page_mapping_insert(__address page, __address frame, int flags, __address root);
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| 68 | extern pte_t *page_mapping_find(__address page, __address root);
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| 69 | extern void map_structure(__address s, size_t size);
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| 70 |
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| 71 | #endif
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