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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> |
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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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39 | 43 | ||
- | 44 | /** Address space structure. |
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- | 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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40 | extern as_operations_t as_ht_operations; |
53 | link_t inactive_as_with_asid_link; |
- | 54 | ||
- | 55 | mutex_t lock; |
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- | 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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41 | 87 | ||
42 | #endif |
88 | #endif |
43 | 89 | ||
44 | /** @} |
90 | /** @} |
45 | */ |
91 | */ |