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1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Jakub Jermar |
2 | * Copyright (C) 2006 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
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 |
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. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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 |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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 |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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 |
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. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /* |
29 | /* |
30 | * This is the generic page hash table interface. |
30 | * This is the generic page hash table interface. |
31 | * Architectures that use single page hash table for |
31 | * Architectures that use single page hash table for |
32 | * storing page translations must implement it. |
32 | * storing page translations must implement it. |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef __PAGE_HT_H__ |
35 | #ifndef __PAGE_HT_H__ |
36 | #define __PAGE_HT_H__ |
36 | #define __PAGE_HT_H__ |
37 | 37 | ||
38 | #include <mm/page.h> |
38 | #include <mm/page.h> |
39 | #include <typedefs.h> |
39 | #include <typedefs.h> |
40 | 40 | ||
41 | /** Number of slots in page hash table. */ |
41 | /** Page hash table size. */ |
42 | #define HT_ENTRIES HT_ENTRIES_ARCH |
42 | #define HT_WIDTH HT_WIDTH_ARCH |
- | 43 | #define HT_SIZE (1<<HT_WIDTH) |
|
- | 44 | #define HT_ENTRIES (HT_SIZE/sizeof(pte_t)) |
|
43 | 45 | ||
44 | /** Hash function. |
46 | /** Hash function. |
45 | * |
47 | * |
46 | * @param page Virtual address. Only vpn bits will be used. |
48 | * @param page Virtual address. Only vpn bits will be used. |
47 | * @param asid Address space identifier. |
49 | * @param asid Address space identifier. |
48 | * |
50 | * |
49 | * @return Pointer to hash table typed pte_t *. |
51 | * @return Pointer to hash table typed pte_t *. |
50 | */ |
52 | */ |
51 | #define HT_HASH(page, asid) HT_HASH_ARCH(page, asid) |
53 | #define HT_HASH(page, asid) HT_HASH_ARCH(page, asid) |
52 | 54 | ||
53 | /** Compare PTE with page and asid. |
55 | /** Compare PTE with page and asid. |
54 | * |
56 | * |
55 | * @param page Virtual address. Only vpn bits will be used. |
57 | * @param page Virtual address. Only vpn bits will be used. |
56 | * @param asid Address space identifier. |
58 | * @param asid Address space identifier. |
57 | * @param t PTE. |
59 | * @param t PTE. |
58 | * |
60 | * |
59 | * @return 1 on match, 0 otherwise. |
61 | * @return 1 on match, 0 otherwise. |
60 | */ |
62 | */ |
61 | #define HT_COMPARE(page, asid, t) HT_COMPARE_ARCH(page, asid, t) |
63 | #define HT_COMPARE(page, asid, t) HT_COMPARE_ARCH(page, asid, t) |
62 | 64 | ||
63 | /** Identify empty page hash table slots. |
65 | /** Identify empty page hash table slots. |
64 | * |
66 | * |
65 | * @param t Pointer ro hash table typed pte_t *. |
67 | * @param t Pointer ro hash table typed pte_t *. |
66 | * |
68 | * |
67 | * @return 1 if the slot is empty, 0 otherwise. |
69 | * @return 1 if the slot is empty, 0 otherwise. |
68 | */ |
70 | */ |
69 | #define HT_SLOT_EMPTY(t) HT_SLOT_EMPTY_ARCH(t) |
71 | #define HT_SLOT_EMPTY(t) HT_SLOT_EMPTY_ARCH(t) |
70 | 72 | ||
71 | /** Invalidate/empty page hash table slot. |
73 | /** Invalidate/empty page hash table slot. |
72 | * |
74 | * |
73 | * @param t Address of the slot to be invalidated. |
75 | * @param t Address of the slot to be invalidated. |
74 | */ |
76 | */ |
75 | #define HT_INVALIDATE_SLOT(t) HT_INVALIDATE_SLOT_ARCH(t) |
77 | #define HT_INVALIDATE_SLOT(t) HT_INVALIDATE_SLOT_ARCH(t) |
76 | 78 | ||
77 | /** Return next record in collision chain. |
79 | /** Return next record in collision chain. |
78 | * |
80 | * |
79 | * @param t PTE. |
81 | * @param t PTE. |
80 | * |
82 | * |
81 | * @return Successor of PTE or NULL. |
83 | * @return Successor of PTE or NULL. |
82 | */ |
84 | */ |
83 | #define HT_GET_NEXT(t) HT_GET_NEXT_ARCH(t) |
85 | #define HT_GET_NEXT(t) HT_GET_NEXT_ARCH(t) |
84 | 86 | ||
85 | /** Set successor in collision chain. |
87 | /** Set successor in collision chain. |
86 | * |
88 | * |
87 | * @param t PTE. |
89 | * @param t PTE. |
88 | * @param s Successor or NULL. |
90 | * @param s Successor or NULL. |
89 | */ |
91 | */ |
90 | #define HT_SET_NEXT(t, s) HT_SET_NEXT_ARCH(t, s) |
92 | #define HT_SET_NEXT(t, s) HT_SET_NEXT_ARCH(t, s) |
91 | 93 | ||
92 | /** Set page hash table record. |
94 | /** Set page hash table record. |
93 | * |
95 | * |
94 | * @param t PTE. |
96 | * @param t PTE. |
95 | * @param page Virtual address. Only vpn bits will be used. |
97 | * @param page Virtual address. Only vpn bits will be used. |
96 | * @param asid Address space identifier. |
98 | * @param asid Address space identifier. |
97 | * @param frame Physical address. Only pfn bits will be used. |
99 | * @param frame Physical address. Only pfn bits will be used. |
98 | * @param flags Flags. See mm/page.h. |
100 | * @param flags Flags. See mm/page.h. |
99 | */ |
101 | */ |
100 | #define HT_SET_RECORD(t, page, asid, frame, flags) HT_SET_RECORD_ARCH(t, page, asid, frame, flags) |
102 | #define HT_SET_RECORD(t, page, asid, frame, flags) HT_SET_RECORD_ARCH(t, page, asid, frame, flags) |
101 | 103 | ||
102 | - | ||
103 | extern page_operations_t page_ht_operations; |
104 | extern page_operations_t page_ht_operations; |
104 | extern spinlock_t page_ht_lock; |
105 | extern spinlock_t page_ht_lock; |
105 | 106 | ||
106 | extern pte_t *page_ht; |
107 | extern pte_t *page_ht; |
107 | 108 | ||
108 | extern void ht_invalidate_all(void); |
109 | extern void ht_invalidate_all(void); |
109 | 110 | ||
110 | #endif |
111 | #endif |
111 | 112 |