MIO_EMM_DMA_CFG
dma_cfg = readq(host->dma_base + MIO_EMM_DMA_CFG(host));
writeq(dma_cfg, host->dma_base + MIO_EMM_DMA_CFG(host));
dma_cfg = readq(host->dma_base + MIO_EMM_DMA_CFG(host));
writeq(dma_cfg, host->dma_base + MIO_EMM_DMA_CFG(host));
writeq(dma_cfg, host->dma_base + MIO_EMM_DMA_CFG(host));