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Rev 1809 Rev 1816
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    }
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    }
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    paging_on();
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    paging_on();
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}
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}
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uintptr_t hw_map(uintptr_t physaddr, size_t size)
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{
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    if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))
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        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
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    uintptr_t virtaddr = PA2KA(last_frame);
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    pfn_t i;
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    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
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        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);
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    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
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    return virtaddr;
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}
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void page_fault(int n, istate_t *istate)
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void page_fault(int n, istate_t *istate)
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{
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{
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        uintptr_t page;
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    uintptr_t page;
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    pf_access_t access;
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    pf_access_t access;
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