# Copyright (c) 2020 Alex Forencich
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# RGMII Gigabit Ethernet MAC timing constraints

proc constrain_eth_mac_1g_rgmii_inst { inst } {
    puts "Inserting timing constraints for eth_mac_1g_rgmii instance $inst"

    # MII select sync
    set_max_delay -from [get_registers "$inst|mii_select_reg"] -to [get_registers "$inst|tx_mii_select_sync[0]"] 8.000
    set_max_delay -from [get_registers "$inst|mii_select_reg"] -to [get_registers "$inst|rx_mii_select_sync[0]"] 8.000

    # RX prescale sync
    set_max_delay -from [get_registers "$inst|rx_prescale[2]"] -to [get_registers "$inst|rx_prescale_sync[0]"] 8.000

    constrain_rgmii_phy_if_inst "$inst|rgmii_phy_if_inst"
}