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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/as.h> |
38 | #include <mm/mm.h> |
| - | 39 | #include <arch/mm/asid.h> |
|
| - | 40 | #include <adt/list.h> |
|
| - | 41 | #include <adt/btree.h> |
|
| - | 42 | #include <synch/mutex.h> |
|
| 39 | 43 | ||
| - | 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 { |
|
| - | 52 | /** Protected by asidlock. */ |
|
| 40 | extern as_operations_t as_ht_operations; |
53 | link_t inactive_as_with_asid_link; |
| - | 54 | ||
| - | 55 | mutex_t lock; |
|
| - | 56 | ||
| - | 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 { |
|
| - | 74 | link_t link; /**< Page hash table link. */ |
|
| - | 75 | as_t *as; /**< Address space. */ |
|
| - | 76 | uintptr_t page; /**< Virtual memory page. */ |
|
| - | 77 | uintptr_t frame; /**< Physical memory frame. */ |
|
| - | 78 | unsigned g : 1; /**< Global page. */ |
|
| - | 79 | unsigned x : 1; /**< Execute. */ |
|
| - | 80 | unsigned w : 1; /**< Writable. */ |
|
| - | 81 | unsigned k : 1; /**< Kernel privileges required. */ |
|
| - | 82 | unsigned c : 1; /**< Cacheable. */ |
|
| - | 83 | unsigned a : 1; /**< Accessed. */ |
|
| - | 84 | unsigned d : 1; /**< Dirty. */ |
|
| - | 85 | unsigned p : 1; /**< Present. */ |
|
| - | 86 | } pte_t; |
|
| 41 | 87 | ||
| 42 | #endif |
88 | #endif |
| 43 | 89 | ||
| 44 | /** @} |
90 | /** @} |
| 45 | */ |
91 | */ |
| 46 | 92 | ||