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| Rev 120 | Rev 125 | ||
|---|---|---|---|
| Line 51... | Line 51... | ||
| 51 | void map_structure(__address s, size_t size) |
51 | void map_structure(__address s, size_t size) |
| 52 | { |
52 | { |
| 53 | int i, cnt, length; |
53 | int i, cnt, length; |
| 54 | 54 | ||
| 55 | /* TODO: implement portable way of computing page address from address */ |
55 | /* TODO: implement portable way of computing page address from address */ |
| 56 | length = size + (s - (s & 0xfffff000)); |
56 | length = size + (s - (s & 0xfffff000)); |
| 57 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
57 | cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
| 58 | 58 | ||
| 59 | for (i = 0; i < cnt; i++) |
59 | for (i = 0; i < cnt; i++) |
| 60 | map_page_to_frame(s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
60 | map_page_to_frame(s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
| 61 | 61 | ||
| 62 | } |
62 | } |
| 63 | 63 | ||
| 64 | /** Map page to frame |
64 | /** Map page to frame |
| 65 | * |
65 | * |
| Line 71... | Line 71... | ||
| 71 | * @param flags Flags to be used for mapping. |
71 | * @param flags Flags to be used for mapping. |
| 72 | * @param root Explicit PTL0 address. |
72 | * @param root Explicit PTL0 address. |
| 73 | */ |
73 | */ |
| 74 | void map_page_to_frame(__address page, __address frame, int flags, __address root) |
74 | void map_page_to_frame(__address page, __address frame, int flags, __address root) |
| 75 | { |
75 | { |
| 76 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
76 | pte_t *ptl0, *ptl1, *ptl2, *ptl3; |
| 77 | __address newpt; |
77 | __address newpt; |
| 78 | 78 | ||
| 79 | ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
79 | ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS()); |
| 80 | 80 | ||
| 81 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
81 | if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) { |
| 82 | newpt = frame_alloc(FRAME_KA); |
82 | newpt = frame_alloc(FRAME_KA); |
| 83 | memsetb(newpt, PAGE_SIZE, 0); |
83 | memsetb(newpt, PAGE_SIZE, 0); |
| 84 | SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
84 | SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt)); |
| 85 | SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER); |
85 | SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER); |
| 86 | } |
86 | } |
| 87 | 87 | ||
| 88 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
88 | ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page))); |
| 89 | 89 | ||
| 90 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
90 | if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) { |
| 91 | newpt = frame_alloc(FRAME_KA); |
91 | newpt = frame_alloc(FRAME_KA); |
| 92 | memsetb(newpt, PAGE_SIZE, 0); |
92 | memsetb(newpt, PAGE_SIZE, 0); |
| 93 | SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
93 | SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt)); |
| 94 | SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER); |
94 | SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER); |
| 95 | } |
95 | } |
| 96 | 96 | ||
| 97 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
97 | ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page))); |
| 98 | 98 | ||
| 99 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
99 | if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) { |
| 100 | newpt = frame_alloc(FRAME_KA); |
100 | newpt = frame_alloc(FRAME_KA); |
| 101 | memsetb(newpt, PAGE_SIZE, 0); |
101 | memsetb(newpt, PAGE_SIZE, 0); |
| 102 | SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
102 | SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt)); |
| 103 | SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER); |
103 | SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER); |
| 104 | } |
104 | } |
| 105 | 105 | ||
| 106 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
106 | ptl3 = (pte_t *) PA2KA(GET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page))); |
| 107 | 107 | ||
| 108 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
108 | SET_FRAME_ADDRESS(ptl3, PTL3_INDEX(page), frame); |
| 109 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
109 | SET_FRAME_FLAGS(ptl3, PTL3_INDEX(page), flags); |
| 110 | } |
110 | } |