Subversion Repositories xge_mac

/**

 * 10 GE MAC Core verification environment file.

 * @file: env.sv

 * @author: Pratik Mahajan

 * @par Contact: pratik@e-pigeonpost.com

 * @par Company: UCSC (SV 1896 Systemverilog for advanced verification course)

 *

 * @version: $LastChangedRevision$

 * @par Last Changed Date:

 * $LastChangedDate$

 * @par Last Changed By:

 * $LastChangedBy$

 */

/**

 * Environment class to contain all test components viz. driver, monitor and scoreboard.

 * Environment instantiates driver, monitor and scoreboard, acts as a intermediatery

 * between all of them.

 * @class env

 * @par

 */

class env;

   driver macCoreDriver;   ///< handle for driver type object to send data to MAC Core.

   monitor macCoreMonitor; ///< handle for monitor type object to collect data from MAC Core.

   scoreboard macCoreScoreboard;

   mailbox driver2Scoreboard;

   mailbox monitor2Scoreboard;

   virtual macCoreInterface virtualMacCoreInterfaceDriver;  ///< virtual interface to connect driver type object to MAC core RTL

   virtual macCoreInterface virtualMacCoreInterfaceMonitor; ///< virtual interface to connect monitor type object to MAC core RTL

   /**

    * Constructor for environment class.

    * Main purpose of the constructor is to connect virtual interfaces to respective objects

    * and pass down proper parameters to scoreboard for checking

    * @param driverVirtualInterface to connect interface with driver object

    * @param monitorVirtualInterface to connect interface with monitor object

    * @return: NA (returns handle and creates object of type environment class

    */

   function new ( virtual macCoreInterface driverVirtualInterface,

                  virtual macCoreInterface monitorVirtualInterface );

      this.virtualMacCoreInterfaceDriver = driverVirtualInterface;

      this.virtualMacCoreInterfaceMonitor = monitorVirtualInterface;

      driver2Scoreboard = new ();

      monitor2Scoreboard = new ();

      macCoreDriver = new (virtualMacCoreInterfaceDriver, driver2Scoreboard);

      macCoreMonitor = new (virtualMacCoreInterfaceMonitor, monitor2Scoreboard);

      macCoreScoreboard = new (driver2Scoreboard, monitor2Scoreboard);

   endfunction // new

   /**

    * Init task for all testcases to initialize MAC core with pre simulation configuration.

    * Main purpose of the task is to initialize all inputs of simple Tx Rx interface of MAC to 0

    */

   task init ();

      virtualMacCoreInterfaceMonitor.clockingTxRx.receiveReadEnable             <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.transmitData                   <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.transmitValid                  <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.transmitStartOfPacket          <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.transmitEndOfPacket            <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.transmitPacketLengthModulus    <= 0;

   endtask // init

   /**

    * Reset task for all testcases to put MAC Core through particular reset consitions

    */

   task reset ();

      virtualMacCoreInterfaceDriver.clockingTxRx.rstTxRxInterface_n             <= 0;

      virtualMacCoreInterfaceDriver.clockingXGMIIRx.rstXGMIIInterfaceRx_n       <= 0;

      virtualMacCoreInterfaceDriver.clockingXGMIITx.rstXGMIIInterfaceTx_n       <= 0;

      virtualMacCoreInterfaceDriver.clockingTxRx.rstWishboneInterface           <= 0;

      repeat (10) @(virtualMacCoreInterfaceDriver.clockingTxRx);

      virtualMacCoreInterfaceDriver.clockingTxRx.rstTxRxInterface_n             <= 1;

      virtualMacCoreInterfaceDriver.clockingXGMIIRx.rstXGMIIInterfaceRx_n       <= 1;

      virtualMacCoreInterfaceDriver.clockingXGMIITx.rstXGMIIInterfaceTx_n       <= 1;

      virtualMacCoreInterfaceDriver.clockingTxRx.rstWishboneInterface           <= 1;

   endtask // reset

   /**

    * Run task for all testcases to start simulating / executing instructions / consuming time.

    * Main purpose of the task is to instantiate send_packet and collect_packet and call scoreboard checking if available

    */

   task run (int noOfPackets = 10, int lengthOfFrame = 60);

      fork

         for (int i = 0; i < noOfPackets; i++)

           begin

              @(virtualMacCoreInterfaceDriver.clockingTxRx)

                $display ("=========Sending Packet #%0d============ at time %0t\n", i, $time);

              macCoreDriver.send_packet(lengthOfFrame);

           end

         for (int i = 0; i < noOfPackets; i++)

           begin

              wait (virtualMacCoreInterfaceMonitor.clockingTxRx.receiveAvailable == 1'b1);

              $display ("========Collecting Packet #%0d===========\n", i);

              macCoreMonitor.collect_packet();

           end

      join

   endtask // run

   task validate (int noOfPackets = 10, int lengthOfFrame = 60);

      for (int i = 0; i < noOfPackets; i++)

        begin

           for (int j = 0; j < lengthOfFrame; j += 8)

             begin

                int bytesInFrame;

                if ( (j+8) > lengthOfFrame) bytesInFrame = lengthOfFrame % 8;

                else bytesInFrame = 0;

                macCoreScoreboard.compare (driver2Scoreboard, monitor2Scoreboard, bytesInFrame);

             end

        end

   endtask // validate

endclass // env