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Rev 711 Rev 718
Line 140... Line 140...
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        for (i=0; i<size; i++) {
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        for (i=0; i<size; i++) {
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            /*
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            /*
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             * Frames will be allocated on-demand by
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             * Frames will be allocated on-demand by
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             * as_page_fault() or preloaded by
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             * as_page_fault() or preloaded by
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             * as_area_load_mapping().
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             * as_area_set_mapping().
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             */
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             */
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            a->mapping[i] = UNALLOCATED_PFN;
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            a->mapping[i] = UNALLOCATED_PFN;
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        }
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        }
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        spinlock_initialize(&a->lock, "as_area_lock");
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        spinlock_initialize(&a->lock, "as_area_lock");
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/** Load mapping for address space area.
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/** Load mapping for address space area.
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 *
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 *
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 * Initialize a->mapping.
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 * Initialize a->mapping.
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 *
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 *
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 * @param a Target address space area.
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 * @param a   Target address space area.
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 * @param pfn Array of frame numbers. Number of elements must match with a->mapping.
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 * @param vpn Page number relative to area start.
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 * @param pfn Frame number to map.
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 */
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 */
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void as_area_load_mapping(as_area_t *a, index_t *pfn)
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void as_area_set_mapping(as_area_t *a, index_t vpn, index_t pfn)
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{
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{
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    ASSERT(vpn < a->size);
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    ASSERT(a->mapping[vpn] == UNALLOCATED_PFN);
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    ASSERT(pfn != UNALLOCATED_PFN);
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    ipl_t ipl;
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    ipl_t ipl;
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    int i;
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    ipl = interrupts_disable();
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    ipl = interrupts_disable();
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    spinlock_lock(&a->lock);
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    spinlock_lock(&a->lock);
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    for (i = 0; i < a->size; i++) {
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        ASSERT(a->mapping[i] == UNALLOCATED_PFN);
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        ASSERT(pfn[i] != UNALLOCATED_PFN);
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        a->mapping[i] = pfn[i];
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    a->mapping[vpn] = pfn;
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    }
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    spinlock_unlock(&a->lock);
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    spinlock_unlock(&a->lock);
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    interrupts_restore(ipl);
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    interrupts_restore(ipl);
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}
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}
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    if (area->mapping[vpn] == UNALLOCATED_PFN) {
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    if (area->mapping[vpn] == UNALLOCATED_PFN) {
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        frame = frame_alloc(0, ONE_FRAME, NULL);
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        frame = frame_alloc(0, ONE_FRAME, NULL);
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        memsetb(PA2KA(frame), FRAME_SIZE, 0);
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        memsetb(PA2KA(frame), FRAME_SIZE, 0);
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        area->mapping[vpn] = frame / FRAME_SIZE;
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        area->mapping[vpn] = frame / FRAME_SIZE;
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        ASSERT(area->mapping[vpn] != UNALLOCATED_PFN);
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        ASSERT(area->mapping[vpn] != UNALLOCATED_PFN);
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    } else {
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    } else
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        frame = area->mapping[vpn] * FRAME_SIZE;
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        frame = area->mapping[vpn] * FRAME_SIZE;
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    }
 - 
 
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    switch (area->type) {
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    switch (area->type) {
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        case AS_AREA_TEXT:
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        case AS_AREA_TEXT:
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            flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE;
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            flags = PAGE_EXEC | PAGE_READ | PAGE_USER | PAGE_PRESENT | PAGE_CACHEABLE;
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            break;
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            break;