| 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 | /** @addtogroup genericmm
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef KERN_PAGE_H_
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| 36 | #define KERN_PAGE_H_
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| 37 |
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| 38 | #include <arch/mm/asid.h>
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| 39 | #include <arch/types.h>
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| 40 | #include <typedefs.h>
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| 41 | #include <memstr.h>
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| 42 |
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| 43 | #define PAGE_CACHEABLE_SHIFT 0
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| 44 | #define PAGE_NOT_CACHEABLE_SHIFT PAGE_CACHEABLE_SHIFT
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| 45 | #define PAGE_PRESENT_SHIFT 1
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| 46 | #define PAGE_NOT_PRESENT_SHIFT PAGE_PRESENT_SHIFT
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| 47 | #define PAGE_USER_SHIFT 2
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| 48 | #define PAGE_KERNEL_SHIFT PAGE_USER_SHIFT
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| 49 | #define PAGE_READ_SHIFT 3
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| 50 | #define PAGE_WRITE_SHIFT 4
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| 51 | #define PAGE_EXEC_SHIFT 5
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| 52 | #define PAGE_GLOBAL_SHIFT 6
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| 53 |
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| 54 | #define PAGE_NOT_CACHEABLE (0<<PAGE_CACHEABLE_SHIFT)
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| 55 | #define PAGE_CACHEABLE (1<<PAGE_CACHEABLE_SHIFT)
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| 56 |
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| 57 | #define PAGE_PRESENT (0<<PAGE_PRESENT_SHIFT)
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| 58 | #define PAGE_NOT_PRESENT (1<<PAGE_PRESENT_SHIFT)
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| 59 |
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| 60 | #define PAGE_USER (1<<PAGE_USER_SHIFT)
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| 61 | #define PAGE_KERNEL (0<<PAGE_USER_SHIFT)
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| 62 |
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| 63 | #define PAGE_READ (1<<PAGE_READ_SHIFT)
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| 64 | #define PAGE_WRITE (1<<PAGE_WRITE_SHIFT)
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| 65 | #define PAGE_EXEC (1<<PAGE_EXEC_SHIFT)
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| 66 |
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| 67 | #define PAGE_GLOBAL (1<<PAGE_GLOBAL_SHIFT)
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| 68 |
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| 69 |
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| 70 | /**
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| 71 | * Macro for computing page color.
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| 72 | */
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| 73 | #define PAGE_COLOR(va) (((va) >> PAGE_WIDTH) & ((1 << PAGE_COLOR_BITS) - 1))
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| 74 |
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| 75 | /** Page fault access type. */
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| 76 | enum pf_access {
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| 77 | PF_ACCESS_READ,
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| 78 | PF_ACCESS_WRITE,
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| 79 | PF_ACCESS_EXEC
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| 80 | };
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| 81 | typedef enum pf_access pf_access_t;
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| 82 |
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| 83 | /** Operations to manipulate page mappings. */
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| 84 | struct page_mapping_operations {
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| 85 | void (* mapping_insert)(as_t *as, uintptr_t page, uintptr_t frame, int
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| 86 | flags);
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| 87 | void (* mapping_remove)(as_t *as, uintptr_t page);
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| 88 | pte_t *(* mapping_find)(as_t *as, uintptr_t page);
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| 89 | };
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| 90 | typedef struct page_mapping_operations page_mapping_operations_t;
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| 91 |
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| 92 | extern page_mapping_operations_t *page_mapping_operations;
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| 93 |
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| 94 | extern void page_init(void);
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| 95 | extern void page_table_lock(as_t *as, bool lock);
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| 96 | extern void page_table_unlock(as_t *as, bool unlock);
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| 97 | extern void page_mapping_insert(as_t *as, uintptr_t page, uintptr_t frame, int
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| 98 | flags);
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| 99 | extern void page_mapping_remove(as_t *as, uintptr_t page);
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| 100 | extern pte_t *page_mapping_find(as_t *as, uintptr_t page);
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| 101 | extern pte_t *page_table_create(int flags);
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| 102 | extern void page_table_destroy(pte_t *page_table);
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| 103 | extern void map_structure(uintptr_t s, size_t size);
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| 104 | extern uintptr_t hw_map(uintptr_t physaddr, size_t size);
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| 105 |
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| 106 | #endif
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| 107 |
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| 108 | /** @}
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| 109 | */
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