CVMX_GMXX_RXX_FRM_CTL
cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL
cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface),
gmxx_rxx_frm_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL(index,
cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(index, interface),
cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL(index, interface));