VIRTEX4_

weiyu0206

STARTUP_VIRTEX4 STARTUP_VIRTEX4_inst (
      .EOS(EOS), // End Of Startup 1-bit output
      .CLK(CLK), // Clock input for start-up sequence
      .GSR(GSR_PORT), // Global Set/Reset input (GSR can not be used as a port name)
      .GTS(GTS_PORT), // Global 3-state input (GTS can not be used as a port name)
      .USRCCLKO(USRCCLKO), // USERCLK0 1-bit input
      .USRCCLKTS(USRCCLKTS), // USERCLKTS 1-bit input
      .USRDONEO(USRDONEO), // USRDONE0 1-bit input
      .USRDONETS(USRDONETS) // USRDONETS 1-bit input
   );
这个原语怎么调用？