PORT_HDR_CTRL
v = readq(base + PORT_HDR_CTRL);
v = readq(base + PORT_HDR_CTRL);
writeq(v, base + PORT_HDR_CTRL);
v = readq(base + PORT_HDR_CTRL);
writeq(v, base + PORT_HDR_CTRL);
if (readq_poll_timeout(base + PORT_HDR_CTRL, v,
v = readq(base + PORT_HDR_CTRL);
writeq(v, base + PORT_HDR_CTRL);
if (readq_poll_timeout(base + PORT_HDR_CTRL, v,