PHY_PREAMBLE     3589 dev/pci/if_em_hw.c         em_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);
PHY_PREAMBLE     3724 dev/pci/if_em_hw.c         em_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE);