CA_WRITEBACK
movi a4, XCHAL_KSEG_PADDR + CA_WRITEBACK
movi a4, XCHAL_KSEG_PADDR + 0x10000000 + CA_WRITEBACK
movi a4, XCHAL_KIO_DEFAULT_PADDR + CA_WRITEBACK
write_dtlb_entry(__pte(xtensa_kio_paddr + CA_WRITEBACK),
write_itlb_entry(__pte(xtensa_kio_paddr + CA_WRITEBACK),