WebSVN – HelenOS-historic – Diff – /kernel/trunk/genarch/src/mm/page_pt.c



    __address newpt;
 
    ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS());
 
    if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
        newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
        memsetb(newpt, PAGE_SIZE, 0);
        SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));
        SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
    }
 
    ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));
 
    if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
        newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
        memsetb(newpt, PAGE_SIZE, 0);
        SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));
        SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
    }
 
    ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));
 
    if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
        newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
        memsetb(newpt, PAGE_SIZE, 0);
        SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));
        SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT | PAGE_USER | PAGE_EXEC | PAGE_CACHEABLE | PAGE_WRITE);
    }
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/genarch/src/mm/page_pt.c – Rev 687 → 689

Rev 687		Rev 689
Line 61...		Line 61...
61	__address newpt;	61	__address newpt;
62		62
63	ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS());	63	ptl0 = (pte_t *) PA2KA(root ? root : (__address) GET_PTL0_ADDRESS());
64		64
65	if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {	65	if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
66	newpt = frame_alloc(FRAME_KA, ONE_FRAME);	66	newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
67	memsetb(newpt, PAGE_SIZE, 0);	67	memsetb(newpt, PAGE_SIZE, 0);
68	SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));	68	SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));
69	SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	69	SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
70	}	70	}
71		71
72	ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));	72	ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));
73		73
74	if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {	74	if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
75	newpt = frame_alloc(FRAME_KA, ONE_FRAME);	75	newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
76	memsetb(newpt, PAGE_SIZE, 0);	76	memsetb(newpt, PAGE_SIZE, 0);
77	SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));	77	SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));
78	SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	78	SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
79	}	79	}
80		80
81	ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));	81	ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));
82		82
83	if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {	83	if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
84	newpt = frame_alloc(FRAME_KA, ONE_FRAME);	84	newpt = frame_alloc(FRAME_KA, ONE_FRAME, NULL);
85	memsetb(newpt, PAGE_SIZE, 0);	85	memsetb(newpt, PAGE_SIZE, 0);
86	SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));	86	SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));
87	SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	87	SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
88	}	88	}
89		89