RCV_HDR_HEAD
write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, reg);
head = (read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD)
write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0);
read_uctxt_csr(dd, ctxt, RCV_HDR_HEAD);
write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0x10);
write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, 0x00);
read_uctxt_csr(dd, ctxt, RCV_HDR_HEAD);
write_uctxt_csr(dd, ctxt, RCV_HDR_HEAD, reg);
write_uctxt_csr(dd, i, RCV_HDR_HEAD, 0);
read_uctxt_csr(rcd->dd, rcd->ctxt, RCV_HDR_HEAD) &