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| Rev 3104 | Rev 3382 | ||
|---|---|---|---|
| Line 76... | Line 76... | ||
| 76 | * serviced). |
76 | * serviced). |
| 77 | */ |
77 | */ |
| 78 | int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access) |
78 | int anon_page_fault(as_area_t *area, uintptr_t addr, pf_access_t access) |
| 79 | { |
79 | { |
| 80 | uintptr_t frame; |
80 | uintptr_t frame; |
| 81 | bool dirty = false; |
- | |
| 82 | 81 | ||
| 83 | if (!as_area_check_access(area, access)) |
82 | if (!as_area_check_access(area, access)) |
| 84 | return AS_PF_FAULT; |
83 | return AS_PF_FAULT; |
| 85 | 84 | ||
| 86 | if (area->sh_info) { |
85 | if (area->sh_info) { |
| Line 104... | Line 103... | ||
| 104 | * Zero can be returned as a valid frame address. |
103 | * Zero can be returned as a valid frame address. |
| 105 | * Just a small workaround. |
104 | * Just a small workaround. |
| 106 | */ |
105 | */ |
| 107 | for (i = 0; i < leaf->keys; i++) { |
106 | for (i = 0; i < leaf->keys; i++) { |
| 108 | if (leaf->key[i] == |
107 | if (leaf->key[i] == |
| 109 | ALIGN_DOWN(addr, PAGE_SIZE)) { |
108 | ALIGN_DOWN(addr, PAGE_SIZE) - area->base) { |
| 110 | allocate = false; |
109 | allocate = false; |
| 111 | break; |
110 | break; |
| 112 | } |
111 | } |
| 113 | } |
112 | } |
| 114 | if (allocate) { |
113 | if (allocate) { |
| 115 | frame = (uintptr_t) frame_alloc(ONE_FRAME, 0); |
114 | frame = (uintptr_t) frame_alloc(ONE_FRAME, 0); |
| 116 | memsetb((void *) PA2KA(frame), FRAME_SIZE, 0); |
115 | memsetb((void *) PA2KA(frame), FRAME_SIZE, 0); |
| 117 | dirty = true; |
- | |
| 118 | 116 | ||
| 119 | /* |
117 | /* |
| 120 | * Insert the address of the newly allocated |
118 | * Insert the address of the newly allocated |
| 121 | * frame to the pagemap. |
119 | * frame to the pagemap. |
| 122 | */ |
120 | */ |
| Line 143... | Line 141... | ||
| 143 | * do not forget to distinguish between |
141 | * do not forget to distinguish between |
| 144 | * the different causes |
142 | * the different causes |
| 145 | */ |
143 | */ |
| 146 | frame = (uintptr_t) frame_alloc(ONE_FRAME, 0); |
144 | frame = (uintptr_t) frame_alloc(ONE_FRAME, 0); |
| 147 | memsetb((void *) PA2KA(frame), FRAME_SIZE, 0); |
145 | memsetb((void *) PA2KA(frame), FRAME_SIZE, 0); |
| 148 | dirty = true; |
- | |
| 149 | } |
146 | } |
| 150 | 147 | ||
| 151 | /* |
148 | /* |
| 152 | * Map 'page' to 'frame'. |
149 | * Map 'page' to 'frame'. |
| 153 | * Note that TLB shootdown is not attempted as only new information is |
150 | * Note that TLB shootdown is not attempted as only new information is |