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| 29 | #ifndef __AS_H__ |
29 | #ifndef __AS_H__ |
| 30 | #define __AS_H__ |
30 | #define __AS_H__ |
| 31 | 31 | ||
| 32 | /** Address space area flags. */ |
32 | /** Address space area flags. */ |
| 33 | #define AS_AREA_READ 1 |
33 | #define AS_AREA_READ 1 |
| 34 | #define AS_AREA_WRITE 2 |
34 | #define AS_AREA_WRITE 2 |
| 35 | #define AS_AREA_EXEC 4 |
35 | #define AS_AREA_EXEC 4 |
| 36 | #define AS_AREA_DEVICE 8 |
36 | #define AS_AREA_CACHEABLE 8 |
| 37 | #define AS_AREA_ANON 16 |
- | |
| 38 | 37 | ||
| 39 | #ifdef KERNEL |
38 | #ifdef KERNEL |
| 40 | 39 | ||
| 41 | #include <arch/mm/page.h> |
40 | #include <arch/mm/page.h> |
| 42 | #include <arch/mm/as.h> |
41 | #include <arch/mm/as.h> |
| Line 102... | Line 101... | ||
| 102 | #define AS_PF_FAULT 0 /**< The page fault was not resolved by as_page_fault(). */ |
101 | #define AS_PF_FAULT 0 /**< The page fault was not resolved by as_page_fault(). */ |
| 103 | #define AS_PF_OK 1 /**< The page fault was resolved by as_page_fault(). */ |
102 | #define AS_PF_OK 1 /**< The page fault was resolved by as_page_fault(). */ |
| 104 | #define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace() |
103 | #define AS_PF_DEFER 2 /**< The page fault was caused by memcpy_from_uspace() |
| 105 | or memcpy_to_uspace(). */ |
104 | or memcpy_to_uspace(). */ |
| 106 | 105 | ||
| - | 106 | /** This structure contains information associated with the shared address space area. */ |
|
| - | 107 | typedef struct { |
|
| - | 108 | mutex_t lock; /**< This lock must be acquired only when the as_area lock is held. */ |
|
| - | 109 | count_t refcount; /**< This structure can be deallocated if refcount drops to 0. */ |
|
| - | 110 | btree_t pagemap; /**< B+tree containing complete map of anonymous pages of the shared area. */ |
|
| - | 111 | } share_info_t; |
|
| - | 112 | ||
| - | 113 | /** Address space area backend structure. */ |
|
| - | 114 | typedef struct { |
|
| - | 115 | int (* page_fault)(as_area_t *area, __address addr, pf_access_t access); |
|
| - | 116 | void (* frame_free)(as_area_t *area, __address page, __address frame); |
|
| 107 | typedef struct share_info share_info_t; |
117 | void (* share)(as_area_t *area); |
| - | 118 | } mem_backend_t; |
|
| - | 119 | ||
| - | 120 | /** Backend data stored in address space area. */ |
|
| 108 | typedef struct mem_backend mem_backend_t; |
121 | typedef struct backend_data { |
| - | 122 | __native d1; |
|
| - | 123 | __native d2; |
|
| - | 124 | } mem_backend_data_t; |
|
| 109 | 125 | ||
| 110 | /** Address space area structure. |
126 | /** Address space area structure. |
| 111 | * |
127 | * |
| 112 | * Each as_area_t structure describes one contiguous area of virtual memory. |
128 | * Each as_area_t structure describes one contiguous area of virtual memory. |
| 113 | * In the future, it should not be difficult to support shared areas. |
129 | * In the future, it should not be difficult to support shared areas. |
| 114 | */ |
130 | */ |
| 115 | struct as_area { |
131 | struct as_area { |
| 116 | mutex_t lock; |
132 | mutex_t lock; |
| - | 133 | as_t *as; /**< Containing address space. */ |
|
| 117 | int flags; /**< Flags related to the memory represented by the address space area. */ |
134 | int flags; /**< Flags related to the memory represented by the address space area. */ |
| 118 | int attributes; /**< Attributes related to the address space area itself. */ |
135 | int attributes; /**< Attributes related to the address space area itself. */ |
| 119 | count_t pages; /**< Size of this area in multiples of PAGE_SIZE. */ |
136 | count_t pages; /**< Size of this area in multiples of PAGE_SIZE. */ |
| 120 | __address base; /**< Base address of this area. */ |
137 | __address base; /**< Base address of this area. */ |
| 121 | btree_t used_space; /**< Map of used space. */ |
138 | btree_t used_space; /**< Map of used space. */ |
| 122 | share_info_t *sh_info; /**< If the address space area has been shared, this pointer will |
139 | share_info_t *sh_info; /**< If the address space area has been shared, this pointer will |
| 123 | reference the share info structure. */ |
140 | reference the share info structure. */ |
| 124 | mem_backend_t *backend; /**< Memory backend backing this address space area. */ |
141 | mem_backend_t *backend; /**< Memory backend backing this address space area. */ |
| 125 | void *backend_data[2]; /**< Data to be used by the backend. */ |
- | |
| 126 | }; |
- | |
| 127 | 142 | ||
| 128 | /** Address space area backend structure. */ |
143 | /** Data to be used by the backend. */ |
| 129 | struct mem_backend { |
144 | mem_backend_data_t backend_data; |
| 130 | int (* backend_page_fault)(as_area_t *area, __address addr, pf_access_t access); |
- | |
| 131 | void (* backend_frame_free)(as_area_t *area, __address page, __address frame); |
- | |
| 132 | }; |
145 | }; |
| 133 | 146 | ||
| 134 | extern as_t *AS_KERNEL; |
147 | extern as_t *AS_KERNEL; |
| 135 | extern as_operations_t *as_operations; |
148 | extern as_operations_t *as_operations; |
| 136 | 149 | ||
| Line 138... | Line 151... | ||
| 138 | extern link_t inactive_as_with_asid_head; |
151 | extern link_t inactive_as_with_asid_head; |
| 139 | 152 | ||
| 140 | extern void as_init(void); |
153 | extern void as_init(void); |
| 141 | extern as_t *as_create(int flags); |
154 | extern as_t *as_create(int flags); |
| 142 | extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs, |
155 | extern as_area_t *as_area_create(as_t *as, int flags, size_t size, __address base, int attrs, |
| 143 | mem_backend_t *backend, void **backend_data); |
156 | mem_backend_t *backend, mem_backend_data_t *backend_data); |
| 144 | extern int as_area_resize(as_t *as, __address address, size_t size, int flags); |
157 | extern int as_area_resize(as_t *as, __address address, size_t size, int flags); |
| 145 | extern int as_area_destroy(as_t *as, __address address); |
158 | extern int as_area_destroy(as_t *as, __address address); |
| 146 | extern int as_area_get_flags(as_area_t *area); |
159 | extern int as_area_get_flags(as_area_t *area); |
| 147 | extern void as_set_mapping(as_t *as, __address page, __address frame); |
- | |
| 148 | extern bool as_area_check_access(as_area_t *area, pf_access_t access); |
160 | extern bool as_area_check_access(as_area_t *area, pf_access_t access); |
| 149 | extern int as_page_fault(__address page, pf_access_t access, istate_t *istate); |
161 | extern int as_page_fault(__address page, pf_access_t access, istate_t *istate); |
| 150 | extern void as_switch(as_t *old, as_t *new); |
162 | extern void as_switch(as_t *old, as_t *new); |
| 151 | extern void as_free(as_t *as); |
163 | extern void as_free(as_t *as); |
| 152 | extern int as_area_share(as_t *src_as, __address src_base, size_t acc_size, |
164 | extern int as_area_share(as_t *src_as, __address src_base, size_t acc_size, |
| Line 161... | Line 173... | ||
| 161 | #endif /* !def as_install_arch */ |
173 | #endif /* !def as_install_arch */ |
| 162 | 174 | ||
| 163 | /* Backend declarations. */ |
175 | /* Backend declarations. */ |
| 164 | extern mem_backend_t anon_backend; |
176 | extern mem_backend_t anon_backend; |
| 165 | extern mem_backend_t elf_backend; |
177 | extern mem_backend_t elf_backend; |
| - | 178 | extern mem_backend_t phys_backend; |
|
| 166 | 179 | ||
| 167 | /* Address space area related syscalls. */ |
180 | /* Address space area related syscalls. */ |
| 168 | extern __native sys_as_area_create(__address address, size_t size, int flags); |
181 | extern __native sys_as_area_create(__address address, size_t size, int flags); |
| 169 | extern __native sys_as_area_resize(__address address, size_t size, int flags); |
182 | extern __native sys_as_area_resize(__address address, size_t size, int flags); |
| 170 | extern __native sys_as_area_destroy(__address address); |
183 | extern __native sys_as_area_destroy(__address address); |