Subversion Repositories HelenOS

Rev

Rev 3022 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
684 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
684 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
 
1851 jermar 29
/** @addtogroup genarchmm
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
684 jermar 35
/*
36
 * This is the generic 4-level page table interface.
37
 * Architectures that use hierarchical page tables
38
 * are supposed to implement *_ARCH macros.
39
 */
40
 
1108 jermar 41
#ifdef CONFIG_PAGE_PT
42
 
1888 jermar 43
#ifndef KERN_PAGE_PT_H_
44
#define KERN_PAGE_PT_H_
684 jermar 45
 
46
#include <arch/types.h>
2089 decky 47
#include <mm/as.h>
684 jermar 48
#include <mm/page.h>
49
 
50
/*
832 jermar 51
 * Number of entries in each level.
52
 */
53
#define PTL0_ENTRIES            PTL0_ENTRIES_ARCH
54
#define PTL1_ENTRIES            PTL1_ENTRIES_ARCH
55
#define PTL2_ENTRIES            PTL2_ENTRIES_ARCH
56
#define PTL3_ENTRIES            PTL3_ENTRIES_ARCH
57
 
2465 jermar 58
/* Table sizes in each level */
59
#define PTL0_SIZE           PTL0_SIZE_ARCH
60
#define PTL1_SIZE           PTL1_SIZE_ARCH
61
#define PTL2_SIZE           PTL2_SIZE_ARCH
62
#define PTL3_SIZE           PTL3_SIZE_ARCH
63
 
832 jermar 64
/*
684 jermar 65
 * These macros process vaddr and extract those portions
66
 * of it that function as indices to respective page tables.
67
 */
68
#define PTL0_INDEX(vaddr)       PTL0_INDEX_ARCH(vaddr)
69
#define PTL1_INDEX(vaddr)       PTL1_INDEX_ARCH(vaddr)
70
#define PTL2_INDEX(vaddr)       PTL2_INDEX_ARCH(vaddr)
71
#define PTL3_INDEX(vaddr)       PTL3_INDEX_ARCH(vaddr)
72
 
73
#define SET_PTL0_ADDRESS(ptl0)      SET_PTL0_ADDRESS_ARCH(ptl0)
74
 
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
/*
2467 jermar 85
 * These macros are provided to change the shape of the 4-level tree of page
86
 * tables on respective level.
684 jermar 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
/*
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
/*
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
 
2467 jermar 109
/*
110
 * Macros for querying the last-level PTEs.
111
 */
977 jermar 112
#define PTE_VALID(p)        PTE_VALID_ARCH((p))
113
#define PTE_PRESENT(p)      PTE_PRESENT_ARCH((p))
114
#define PTE_GET_FRAME(p)    PTE_GET_FRAME_ARCH((p))
1423 jermar 115
#define PTE_READABLE(p)     1
116
#define PTE_WRITABLE(p)     PTE_WRITABLE_ARCH((p))
117
#define PTE_EXECUTABLE(p)   PTE_EXECUTABLE_ARCH((p))
832 jermar 118
 
2089 decky 119
extern as_operations_t as_pt_operations;
793 jermar 120
extern page_mapping_operations_t pt_mapping_operations;
684 jermar 121
 
2467 jermar 122
extern void page_mapping_insert_pt(as_t *as, uintptr_t page, uintptr_t frame,
123
    int flags);
1780 jermar 124
extern pte_t *page_mapping_find_pt(as_t *as, uintptr_t page);
684 jermar 125
 
126
#endif
1108 jermar 127
 
128
#endif
1702 cejka 129
 
1851 jermar 130
/** @}
1702 cejka 131
 */