CVMX_SRIOX_STATUS_REG
sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(pcie_port));
sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(0));
sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(1));