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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 | /** @addtogroup genarchmm |
29 | /** @addtogroup genarchmm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_AS_HT_H_ |
35 | #ifndef KERN_AS_HT_H_ |
36 | #define KERN_AS_HT_H_ |
36 | #define KERN_AS_HT_H_ |
37 | 37 | ||
38 | #include <mm/mm.h> |
38 | #include <mm/mm.h> |
39 | #include <arch/mm/asid.h> |
- | |
40 | #include <adt/list.h> |
39 | #include <adt/list.h> |
41 | #include <adt/btree.h> |
- | |
42 | #include <synch/mutex.h> |
40 | #include <arch/types.h> |
43 | 41 | ||
44 | /** Address space structure. |
- | |
45 | * |
- | |
46 | * as_t contains the list of as_areas of userspace accessible |
- | |
47 | * pages for one or more tasks. Ranges of kernel memory pages are not |
- | |
48 | * supposed to figure in the list as they are shared by all tasks and |
- | |
49 | * set up during system initialization. |
- | |
50 | */ |
- | |
51 | typedef struct { |
42 | typedef struct { |
52 | /** Protected by asidlock. */ |
- | |
53 | link_t inactive_as_with_asid_link; |
43 | } as_genarch_t; |
54 | 44 | ||
55 | mutex_t lock; |
45 | struct as; |
56 | 46 | ||
57 | /** Number of references (i.e tasks that reference this as). */ |
- | |
58 | count_t refcount; |
- | |
59 | - | ||
60 | /** Number of processors on wich is this address space active. */ |
- | |
61 | count_t cpu_refcount; |
- | |
62 | - | ||
63 | /** B+tree of address space areas. */ |
- | |
64 | btree_t as_area_btree; |
- | |
65 | - | ||
66 | /** Address space identifier. Constant on architectures that do not support ASIDs.*/ |
- | |
67 | asid_t asid; |
- | |
68 | - | ||
69 | /** Architecture specific content. */ |
- | |
70 | as_arch_t arch; |
- | |
71 | } as_t; |
- | |
72 | - | ||
73 | typedef struct { |
47 | typedef struct pte { |
74 | link_t link; /**< Page hash table link. */ |
48 | link_t link; /**< Page hash table link. */ |
75 | as_t *as; /**< Address space. */ |
49 | struct as *as; /**< Address space. */ |
76 | uintptr_t page; /**< Virtual memory page. */ |
50 | uintptr_t page; /**< Virtual memory page. */ |
77 | uintptr_t frame; /**< Physical memory frame. */ |
51 | uintptr_t frame; /**< Physical memory frame. */ |
78 | unsigned g : 1; /**< Global page. */ |
52 | unsigned g : 1; /**< Global page. */ |
79 | unsigned x : 1; /**< Execute. */ |
53 | unsigned x : 1; /**< Execute. */ |
80 | unsigned w : 1; /**< Writable. */ |
54 | unsigned w : 1; /**< Writable. */ |
81 | unsigned k : 1; /**< Kernel privileges required. */ |
55 | unsigned k : 1; /**< Kernel privileges required. */ |
82 | unsigned c : 1; /**< Cacheable. */ |
56 | unsigned c : 1; /**< Cacheable. */ |
83 | unsigned a : 1; /**< Accessed. */ |
57 | unsigned a : 1; /**< Accessed. */ |
84 | unsigned d : 1; /**< Dirty. */ |
58 | unsigned d : 1; /**< Dirty. */ |
85 | unsigned p : 1; /**< Present. */ |
59 | unsigned p : 1; /**< Present. */ |
86 | } pte_t; |
60 | } pte_t; |
87 | 61 | ||
88 | #endif |
62 | #endif |
89 | 63 | ||
90 | /** @} |
64 | /** @} |
91 | */ |
65 | */ |
92 | 66 |