Subversion Repositories avalon-wishbone-bridge

//------------------------------------------------------------

//   Copyright 2010 Mentor Graphics Corporation

//   All Rights Reserved Worldwide

//

//   Licensed under the Apache License, Version 2.0 (the

//   "License"); you may not use this file except in

//   compliance with the License.  You may obtain a copy of

//   the License at

//

//       http://www.apache.org/licenses/LICENSE-2.0

//

//   Unless required by applicable law or agreed to in

//   writing, software distributed under the License is

//   distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR

//   CONDITIONS OF ANY KIND, either express or implied.  See

//   the License for the specific language governing

//   permissions and limitations under the License.

//------------------------------------------------------------

`ifndef wb_slave_sequence

`define wb_slave_sequence

//

// Class Description:

//

//

class wb_slave_sequence #(N=100) extends uvm_sequence #(wb_slave_seq_item);

// UVM Factory Registration Macro

//

`uvm_object_utils(wb_slave_sequence#(N))

//------------------------------------------

// Data Members (Outputs rand, inputs non-rand)

//------------------------------------------

bit [31:0] memory [int];

//------------------------------------------

// Constraints

//------------------------------------------

//------------------------------------------

// Methods

//------------------------------------------

// Standard UVM Methods:

extern function new(string name = "wb_slave_sequence");

extern task body;

endclass:wb_slave_sequence

function wb_slave_sequence::new(string name = "wb_slave_sequence");

  super.new(name);

endfunction

task wb_slave_sequence::body;

  wb_slave_agent_config m_cfg = wb_slave_agent_config::get_config(m_sequencer);

  wb_slave_seq_item req;

  wb_slave_seq_item rsp;

  req = wb_slave_seq_item#(32,64,2) ::type_id::create("req");

  rsp = wb_slave_seq_item#(32,64,2) ::type_id::create("rsp");

  //wait (m_cfg.WB.rst_n);

  // Slave sequence finishes after 60 transfers:

  repeat(N) begin

    // Get request

    start_item(req);

    finish_item(req);

    $display ("req item emitted\n");

    // Prepare memory for response:

    if (req.rw) begin

      memory[req.addr] = req.wdata;

    end

    else begin

      if(!memory.exists(req.addr)) begin

        memory[req.addr] = 32'hdeadbeef;

        memory[req.addr] = req.addr;

      end

    end

    // Respond:

    start_item(rsp);

    rsp.copy(req);

    assert (rsp.randomize() with {if(!rsp.rw) rsp.rdata == memory[rsp.addr];});

    finish_item(rsp);

    $display ("rsp item emitted\n");

  end

endtask:body

`endif // wb_slave_sequence