NV_ADMA_STAT
writew(0xffff, mmio + NV_ADMA_STAT);
writew(0xffff, mmio + NV_ADMA_STAT);
writew(0xffff, mmio + NV_ADMA_STAT);
u32 status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
status = readw(mmio + NV_ADMA_STAT);
writew(status, mmio + NV_ADMA_STAT);
readw(mmio + NV_ADMA_STAT); /* flush posted write */