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



    __address newpt;
 
    ptl0 = (pte_t *) PA2KA((__address) as->page_table);
 
    if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
        newpt = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
        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 = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
        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 = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
        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 793 → 814

Rev 793		Rev 814
Line 63...		Line 63...
63	__address newpt;	63	__address newpt;
64		64
65	ptl0 = (pte_t *) PA2KA((__address) as->page_table);	65	ptl0 = (pte_t *) PA2KA((__address) as->page_table);
66		66
67	if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {	67	if (GET_PTL1_FLAGS(ptl0, PTL0_INDEX(page)) & PAGE_NOT_PRESENT) {
68	newpt = frame_alloc(ONE_FRAME, FRAME_KA);	68	newpt = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
69	memsetb(newpt, PAGE_SIZE, 0);	69	memsetb(newpt, PAGE_SIZE, 0);
70	SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));	70	SET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page), KA2PA(newpt));
71	SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	71	SET_PTL1_FLAGS(ptl0, PTL0_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
72	}	72	}
73		73
74	ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));	74	ptl1 = (pte_t *) PA2KA(GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(page)));
75		75
76	if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {	76	if (GET_PTL2_FLAGS(ptl1, PTL1_INDEX(page)) & PAGE_NOT_PRESENT) {
77	newpt = frame_alloc(ONE_FRAME, FRAME_KA);	77	newpt = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
78	memsetb(newpt, PAGE_SIZE, 0);	78	memsetb(newpt, PAGE_SIZE, 0);
79	SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));	79	SET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page), KA2PA(newpt));
80	SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	80	SET_PTL2_FLAGS(ptl1, PTL1_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
81	}	81	}
82		82
83	ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));	83	ptl2 = (pte_t *) PA2KA(GET_PTL2_ADDRESS(ptl1, PTL1_INDEX(page)));
84		84
85	if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {	85	if (GET_PTL3_FLAGS(ptl2, PTL2_INDEX(page)) & PAGE_NOT_PRESENT) {
86	newpt = frame_alloc(ONE_FRAME, FRAME_KA);	86	newpt = PA2KA(PFN2ADDR(frame_alloc(ONE_FRAME, FRAME_KA)));
87	memsetb(newpt, PAGE_SIZE, 0);	87	memsetb(newpt, PAGE_SIZE, 0);
88	SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));	88	SET_PTL3_ADDRESS(ptl2, PTL2_INDEX(page), KA2PA(newpt));
89	SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);	89	SET_PTL3_FLAGS(ptl2, PTL2_INDEX(page), PAGE_PRESENT \| PAGE_USER \| PAGE_EXEC \| PAGE_CACHEABLE \| PAGE_WRITE);
90	}	90	}
91		91