DMA_CHAN_RX_BASE_ADDR
reg_space[DMA_CHAN_RX_BASE_ADDR(default_addrs, channel) / 4] =
readl(ioaddr + DMA_CHAN_RX_BASE_ADDR(dwmac4_addrs, channel));
ioaddr + DMA_CHAN_RX_BASE_ADDR(dwmac4_addrs, chan));