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 *
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 *
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 * @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced).
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 * @return AS_PF_FAULT on failure (i.e. page fault) or AS_PF_OK on success (i.e. serviced).
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 */
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 */
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int phys_page_fault(as_area_t *area, __address addr, pf_access_t access)
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int phys_page_fault(as_area_t *area, __address addr, pf_access_t access)
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{
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{
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    __address base = (__address) area->backend_data.d1;
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    __address base = area->backend_data.base;
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    count_t frames = (count_t) area->backend_data.d2;
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    count_t frames = area->backend_data.frames;
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    if (!as_area_check_access(area, access))
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    if (!as_area_check_access(area, access))
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        return AS_PF_FAULT;
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        return AS_PF_FAULT;
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    ASSERT(addr - area->base < frames * FRAME_SIZE);
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    ASSERT(addr - area->base < frames * FRAME_SIZE);