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/** Map memory-mapped device into virtual memory.
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/** Map memory-mapped device into virtual memory.
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 *
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 *
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 * We are currently using identity mapping for mapping device registers.
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 * We are currently using identity mapping for mapping device registers.
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 *
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 *
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 * @param physaddr  Physical address of the page where the device is
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 * @param physaddr Physical address of the page where the device is
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 *          located.
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 *                 located.
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 * @param size      Size of the device's registers. This argument is
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 * @param size     Size of the device's registers.
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 *          ignored.
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 *
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 * @return Virtual address of the page where the device is mapped.
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 *
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 *
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 * @return      Virtual address of the page where the device is mapped.
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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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uintptr_t hw_map(uintptr_t physaddr, size_t size)
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{
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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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        uintptr_t addr = PFN2ADDR(i);
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        page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);
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    }
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    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
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    return PA2KA(physaddr);
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    return virtaddr;
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}
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}
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/** @}
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/** @}
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 */
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 */