Subversion Repositories HelenOS-historic

Rev

Rev 532 | Rev 687 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#ifndef __PAGE_H__
30
#define __PAGE_H__
31
 
32
#include <arch/types.h>
116 jermar 33
#include <typedefs.h>
1 jermar 34
 
120 jermar 35
#define PAGE_CACHEABLE_SHIFT        0
36
#define PAGE_NOT_CACHEABLE_SHIFT    PAGE_CACHEABLE_SHIFT
37
#define PAGE_PRESENT_SHIFT      1
38
#define PAGE_NOT_PRESENT_SHIFT      PAGE_PRESENT_SHIFT
39
#define PAGE_USER_SHIFT         2
40
#define PAGE_KERNEL_SHIFT       PAGE_USER_SHIFT
41
#define PAGE_READ_SHIFT         3
42
#define PAGE_WRITE_SHIFT        4
43
#define PAGE_EXEC_SHIFT         5
1 jermar 44
 
125 jermar 45
#define PAGE_NOT_CACHEABLE  (0<<PAGE_CACHEABLE_SHIFT)
46
#define PAGE_CACHEABLE      (1<<PAGE_CACHEABLE_SHIFT)
1 jermar 47
 
125 jermar 48
#define PAGE_PRESENT        (0<<PAGE_PRESENT_SHIFT)
49
#define PAGE_NOT_PRESENT    (1<<PAGE_PRESENT_SHIFT)
1 jermar 50
 
125 jermar 51
#define PAGE_USER       (1<<PAGE_USER_SHIFT)
52
#define PAGE_KERNEL     (0<<PAGE_USER_SHIFT)
1 jermar 53
 
120 jermar 54
#define PAGE_READ       (1<<PAGE_READ_SHIFT)
55
#define PAGE_WRITE      (1<<PAGE_WRITE_SHIFT)
56
#define PAGE_EXEC       (1<<PAGE_EXEC_SHIFT)
57
 
119 jermar 58
/*
59
 * This is the generic 4-level page table interface.
60
 * Architectures are supposed to implement *_ARCH macros.
61
 */
62
 
63
/*
64
 * These macros process vaddr and extract those portions
65
 * of it that function as indices to respective page tables.
66
 */
67
#define PTL0_INDEX(vaddr)       PTL0_INDEX_ARCH(vaddr)
68
#define PTL1_INDEX(vaddr)       PTL1_INDEX_ARCH(vaddr)
69
#define PTL2_INDEX(vaddr)       PTL2_INDEX_ARCH(vaddr)
70
#define PTL3_INDEX(vaddr)       PTL3_INDEX_ARCH(vaddr)
71
 
120 jermar 72
#define GET_PTL0_ADDRESS()      GET_PTL0_ADDRESS_ARCH()
73
#define SET_PTL0_ADDRESS(ptl0)      SET_PTL0_ADDRESS_ARCH(ptl0)
74
 
119 jermar 75
/*
76
 * These macros traverse the 4-level tree of page tables,
77
 * each descending by one level.
78
 */
79
#define GET_PTL1_ADDRESS(ptl0, i)   GET_PTL1_ADDRESS_ARCH(ptl0, i)
80
#define GET_PTL2_ADDRESS(ptl1, i)   GET_PTL2_ADDRESS_ARCH(ptl1, i)
81
#define GET_PTL3_ADDRESS(ptl2, i)   GET_PTL3_ADDRESS_ARCH(ptl2, i)
82
#define GET_FRAME_ADDRESS(ptl3, i)  GET_FRAME_ADDRESS_ARCH(ptl3, i)
83
 
84
/*
85
 * These macros are provided to change shape of the 4-level
86
 * tree of page tables on respective level.
87
 */
88
#define SET_PTL1_ADDRESS(ptl0, i, a)    SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
89
#define SET_PTL2_ADDRESS(ptl1, i, a)    SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
90
#define SET_PTL3_ADDRESS(ptl2, i, a)    SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
91
#define SET_FRAME_ADDRESS(ptl3, i, a)   SET_FRAME_ADDRESS_ARCH(ptl3, i, a)
92
 
93
/*
120 jermar 94
 * These macros are provided to query various flags within the page tables.
95
 */
96
#define GET_PTL1_FLAGS(ptl0, i)     GET_PTL1_FLAGS_ARCH(ptl0, i)
97
#define GET_PTL2_FLAGS(ptl1, i)     GET_PTL2_FLAGS_ARCH(ptl1, i)
98
#define GET_PTL3_FLAGS(ptl2, i)     GET_PTL3_FLAGS_ARCH(ptl2, i)
99
#define GET_FRAME_FLAGS(ptl3, i)    GET_FRAME_FLAGS_ARCH(ptl3, i)
100
 
101
/*
119 jermar 102
 * These macros are provided to set/clear various flags within the page tables.
103
 */
104
#define SET_PTL1_FLAGS(ptl0, i, x)  SET_PTL1_FLAGS_ARCH(ptl0, i, x)
105
#define SET_PTL2_FLAGS(ptl1, i, x)  SET_PTL2_FLAGS_ARCH(ptl1, i, x)
106
#define SET_PTL3_FLAGS(ptl2, i, x)  SET_PTL3_FLAGS_ARCH(ptl2, i, x)
107
#define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x)
108
 
1 jermar 109
extern void page_init(void);
492 jermar 110
extern void page_mapping_insert(__address page, __address frame, int flags, __address root);
111
extern pte_t *page_mapping_find(__address page, __address root);
116 jermar 112
extern void map_structure(__address s, size_t size);
1 jermar 113
 
114
#endif