Rev 1760 | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 1760 | Rev 1780 | ||
|---|---|---|---|
| Line 49... | Line 49... | ||
| 49 | #include <arch/types.h> |
49 | #include <arch/types.h> |
| 50 | #include <typedefs.h> |
50 | #include <typedefs.h> |
| 51 | #include <align.h> |
51 | #include <align.h> |
| 52 | #include <arch.h> |
52 | #include <arch.h> |
| 53 | 53 | ||
| 54 | static int anon_page_fault(as_area_t *area, __address addr, pf_access_t access); |
54 | static int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access); |
| 55 | static void anon_frame_free(as_area_t *area, __address page, __address frame); |
55 | static void anon_frame_free(as_area_t *area, uintptr_t page, uintptr_t frame); |
| 56 | static void anon_share(as_area_t *area); |
56 | static void anon_share(as_area_t *area); |
| 57 | 57 | ||
| 58 | mem_backend_t anon_backend = { |
58 | mem_backend_t anon_backend = { |
| 59 | .page_fault = anon_page_fault, |
59 | .page_fault = anon_page_fault, |
| 60 | .frame_free = anon_frame_free, |
60 | .frame_free = anon_frame_free, |
| Line 69... | Line 69... | ||
| 69 | * @param addr Faulting virtual address. |
69 | * @param addr Faulting virtual address. |
| 70 | * @param access Access mode that caused the fault (i.e. read/write/exec). |
70 | * @param access Access mode that caused the fault (i.e. read/write/exec). |
| 71 | * |
71 | * |
| 72 | * @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced). |
72 | * @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced). |
| 73 | */ |
73 | */ |
| 74 | int anon_page_fault(as_area_t *area, __address addr, pf_access_t access) |
74 | int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access) |
| 75 | { |
75 | { |
| 76 | __address frame; |
76 | uintptr_t frame; |
| 77 | 77 | ||
| 78 | if (!as_area_check_access(area, access)) |
78 | if (!as_area_check_access(area, access)) |
| 79 | return AS_PF_FAULT; |
79 | return AS_PF_FAULT; |
| 80 | 80 | ||
| 81 | if (area->sh_info) { |
81 | if (area->sh_info) { |
| Line 86... | Line 86... | ||
| 86 | * in the pagemap of the address space area share info structure. |
86 | * in the pagemap of the address space area share info structure. |
| 87 | * In the case that the pagemap does not contain the respective |
87 | * In the case that the pagemap does not contain the respective |
| 88 | * mapping, a new frame is allocated and the mapping is created. |
88 | * mapping, a new frame is allocated and the mapping is created. |
| 89 | */ |
89 | */ |
| 90 | mutex_lock(&area->sh_info->lock); |
90 | mutex_lock(&area->sh_info->lock); |
| 91 | frame = (__address) btree_search(&area->sh_info->pagemap, |
91 | frame = (uintptr_t) btree_search(&area->sh_info->pagemap, |
| 92 | ALIGN_DOWN(addr, PAGE_SIZE) - area->base, &leaf); |
92 | ALIGN_DOWN(addr, PAGE_SIZE) - area->base, &leaf); |
| 93 | if (!frame) { |
93 | if (!frame) { |
| 94 | bool allocate = true; |
94 | bool allocate = true; |
| 95 | int i; |
95 | int i; |
| 96 | 96 | ||
| Line 103... | Line 103... | ||
| 103 | allocate = false; |
103 | allocate = false; |
| 104 | break; |
104 | break; |
| 105 | } |
105 | } |
| 106 | } |
106 | } |
| 107 | if (allocate) { |
107 | if (allocate) { |
| 108 | frame = (__address) frame_alloc(ONE_FRAME, 0); |
108 | frame = (uintptr_t) frame_alloc(ONE_FRAME, 0); |
| 109 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
109 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
| 110 | 110 | ||
| 111 | /* |
111 | /* |
| 112 | * Insert the address of the newly allocated frame to the pagemap. |
112 | * Insert the address of the newly allocated frame to the pagemap. |
| 113 | */ |
113 | */ |
| Line 130... | Line 130... | ||
| 130 | * currently not implemented, would be frame |
130 | * currently not implemented, would be frame |
| 131 | * reuse; when this becomes a possibility, |
131 | * reuse; when this becomes a possibility, |
| 132 | * do not forget to distinguish between |
132 | * do not forget to distinguish between |
| 133 | * the different causes |
133 | * the different causes |
| 134 | */ |
134 | */ |
| 135 | frame = (__address)frame_alloc(ONE_FRAME, 0); |
135 | frame = (uintptr_t)frame_alloc(ONE_FRAME, 0); |
| 136 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
136 | memsetb(PA2KA(frame), FRAME_SIZE, 0); |
| 137 | } |
137 | } |
| 138 | 138 | ||
| 139 | /* |
139 | /* |
| 140 | * Map 'page' to 'frame'. |
140 | * Map 'page' to 'frame'. |
| Line 154... | Line 154... | ||
| 154 | * |
154 | * |
| 155 | * @param area Ignored. |
155 | * @param area Ignored. |
| 156 | * @param page Ignored. |
156 | * @param page Ignored. |
| 157 | * @param frame Frame to be released. |
157 | * @param frame Frame to be released. |
| 158 | */ |
158 | */ |
| 159 | void anon_frame_free(as_area_t *area, __address page, __address frame) |
159 | void anon_frame_free(as_area_t *area, uintptr_t page, uintptr_t frame) |
| 160 | { |
160 | { |
| 161 | frame_free(frame); |
161 | frame_free(frame); |
| 162 | } |
162 | } |
| 163 | 163 | ||
| 164 | /** Share the anonymous address space area. |
164 | /** Share the anonymous address space area. |
| Line 182... | Line 182... | ||
| 182 | btree_node_t *node; |
182 | btree_node_t *node; |
| 183 | int i; |
183 | int i; |
| 184 | 184 | ||
| 185 | node = list_get_instance(cur, btree_node_t, leaf_link); |
185 | node = list_get_instance(cur, btree_node_t, leaf_link); |
| 186 | for (i = 0; i < node->keys; i++) { |
186 | for (i = 0; i < node->keys; i++) { |
| 187 | __address base = node->key[i]; |
187 | uintptr_t base = node->key[i]; |
| 188 | count_t count = (count_t) node->value[i]; |
188 | count_t count = (count_t) node->value[i]; |
| 189 | int j; |
189 | int j; |
| 190 | 190 | ||
| 191 | for (j = 0; j < count; j++) { |
191 | for (j = 0; j < count; j++) { |
| 192 | pte_t *pte; |
192 | pte_t *pte; |