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Rev 548 | Rev 654 | ||
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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, ONE_FRAME); |
82 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
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 | PAGE_EXEC | PAGE_CACHEABLE); |
85 | SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
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, ONE_FRAME); |
91 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
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 | PAGE_EXEC | PAGE_CACHEABLE); |
94 | SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
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, ONE_FRAME); |
100 | newpt = frame_alloc(FRAME_KA, ONE_FRAME); |
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 | PAGE_EXEC | PAGE_CACHEABLE); |
103 | SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE); |
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); |