Subversion Repositories HelenOS-historic

Rev

Rev 684 | Rev 756 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
684 jermar 1
/*
2
 * Copyright (C) 2006 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
/*
30
 * This is the generic page hash table interface.
699 jermar 31
 * Architectures that use single page hash table for
32
 * storing page translations must implement it.
684 jermar 33
 */
34
 
35
#ifndef __PAGE_HT_H__
36
#define __PAGE_HT_H__
37
 
38
#include <mm/page.h>
39
 
699 jermar 40
/** Hash function.
41
 *
42
 * @param page Virtual address. Only vpn bits will be used.
43
 * @param asid Address space identifier.
44
 *
45
 * @return Pointer to hash table typed pte_t *.
46
 */
47
#define HT_HASH(page, asid)     HT_HASH_ARCH(page, asid)
48
 
49
/** Compare PTE with page and asid.
50
 *
51
 * @param page Virtual address. Only vpn bits will be used.
52
 * @param asid Address space identifier.
53
 * @param t PTE.
54
 *
55
 * @return 1 on match, 0 otherwise.
56
 */
57
#define HT_COMPARE(page, asid, t)   HT_COMPARE_ARCH(page, asid, t)
58
 
59
/** Identify empty hash table slots.
60
 *
61
 * @param t Pointer ro hash table typed pte_t *.
62
 *
63
 * @return 1 if the slot is empty, 0 otherwise.
64
 */
65
#define HT_SLOT_EMPTY(t)        HT_SLOT_EMPTY_ARCH(t)
66
 
67
/** Return next record in collision chain.
68
 *
69
 * @param t PTE.
70
 *
71
 * @return Successor of PTE or NULL.
72
 */
73
#define HT_GET_NEXT(t)          HT_GET_NEXT_ARCH(t)
74
 
75
/** Set successor in collision chain.
76
 *
77
 * @param t PTE.
78
 * @param s Successor or NULL.
79
 */
80
#define HT_SET_NEXT(t, s)       HT_SET_NEXT_ARCH(t, s)
81
 
82
/** Set page hash table record.
83
 *
84
 * @param t PTE.
85
 * @param page Virtual address. Only vpn bits will be used.
86
 * @param asid Address space identifier.
87
 * @param frame Physical address. Only pfn bits will be used.
88
 * @param flags Flags. See mm/page.h.
89
 */
90
#define HT_SET_RECORD(t, page, asid, frame, flags)  HT_SET_RECORD_ARCH(t, page, asid, frame, flags)
91
 
684 jermar 92
extern page_operations_t page_ht_operations;
93
 
94
#endif