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| Rev | Author | Line No. | Line |
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| 756 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 756 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1851 | jermar | 29 | /** @addtogroup genarchmm |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1888 | jermar | 35 | #ifndef KERN_AS_HT_H_ |
| 36 | #define KERN_AS_HT_H_ |
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| 756 | jermar | 37 | |
| 2089 | decky | 38 | #include <mm/mm.h> |
| 39 | #include <arch/mm/asid.h> |
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| 40 | #include <adt/list.h> |
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| 41 | #include <adt/btree.h> |
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| 42 | #include <synch/mutex.h> |
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| 756 | jermar | 43 | |
| 2089 | decky | 44 | /** Address space structure. |
| 45 | * |
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| 46 | * as_t contains the list of as_areas of userspace accessible |
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| 47 | * pages for one or more tasks. Ranges of kernel memory pages are not |
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| 48 | * supposed to figure in the list as they are shared by all tasks and |
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| 49 | * set up during system initialization. |
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| 50 | */ |
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| 51 | typedef struct { |
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| 52 | /** Protected by asidlock. */ |
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| 53 | link_t inactive_as_with_asid_link; |
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| 756 | jermar | 54 | |
| 2089 | decky | 55 | mutex_t lock; |
| 56 | |||
| 57 | /** Number of references (i.e tasks that reference this as). */ |
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| 58 | count_t refcount; |
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| 59 | |||
| 60 | /** Number of processors on wich is this address space active. */ |
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| 61 | count_t cpu_refcount; |
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| 62 | |||
| 63 | /** B+tree of address space areas. */ |
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| 64 | btree_t as_area_btree; |
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| 65 | |||
| 66 | /** Address space identifier. Constant on architectures that do not support ASIDs.*/ |
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| 67 | asid_t asid; |
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| 68 | |||
| 69 | /** Architecture specific content. */ |
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| 70 | as_arch_t arch; |
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| 71 | } as_t; |
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| 72 | |||
| 73 | typedef struct { |
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| 74 | link_t link; /**< Page hash table link. */ |
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| 75 | as_t *as; /**< Address space. */ |
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| 76 | uintptr_t page; /**< Virtual memory page. */ |
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| 77 | uintptr_t frame; /**< Physical memory frame. */ |
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| 78 | unsigned g : 1; /**< Global page. */ |
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| 79 | unsigned x : 1; /**< Execute. */ |
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| 80 | unsigned w : 1; /**< Writable. */ |
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| 81 | unsigned k : 1; /**< Kernel privileges required. */ |
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| 82 | unsigned c : 1; /**< Cacheable. */ |
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| 83 | unsigned a : 1; /**< Accessed. */ |
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| 84 | unsigned d : 1; /**< Dirty. */ |
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| 85 | unsigned p : 1; /**< Present. */ |
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| 86 | } pte_t; |
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| 87 | |||
| 756 | jermar | 88 | #endif |
| 1702 | cejka | 89 | |
| 1851 | jermar | 90 | /** @} |
| 1702 | cejka | 91 | */ |