| 53,16 → 53,28 |
|---|
| * |
| * We are currently using identity mapping for mapping device registers. |
| * |
| * @param physaddr Physical address of the page where the device is |
| * located. |
| * @param size Size of the device's registers. This argument is |
| * ignored. |
| * @param physaddr Physical address of the page where the device is |
| * located. |
| * @param size Size of the device's registers. |
| * |
| * @return Virtual address of the page where the device is mapped. |
| * @return Virtual address of the page where the device is mapped. |
| * |
| */ |
| uintptr_t hw_map(uintptr_t physaddr, size_t size) |
| { |
| return PA2KA(physaddr); |
| if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
| panic("Unable to map physical memory %p (%d bytes).", physaddr, size) |
| |
| uintptr_t virtaddr = PA2KA(last_frame); |
| pfn_t i; |
| for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) { |
| uintptr_t addr = PFN2ADDR(i); |
| page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE); |
| } |
| |
| last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
| |
| return virtaddr; |
| } |
| |
| /** @} |