NV_ADMA_CTL_GO
writew((tmp & ~NV_ADMA_CTL_GO) | NV_ADMA_CTL_AIEN |
writew((tmp & ~NV_ADMA_CTL_GO) | NV_ADMA_CTL_AIEN |
writew(tmp & ~NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);
writew(tmp | NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);