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/*

 *                              .--------------. .----------------. .------------.

 *                             | .------------. | .--------------. | .----------. |

 *                             | | ____  ____ | | | ____    ____ | | |   ______ | |

 *                             | ||_   ||   _|| | ||_   \  /   _|| | | .' ___  || |

 *       ___  _ __   ___ _ __  | |  | |__| |  | | |  |   \/   |  | | |/ .'   \_|| |

 *      / _ \| '_ \ / _ \ '_ \ | |  |  __  |  | | |  | |\  /| |  | | || |       | |

 *       (_) | |_) |  __/ | | || | _| |  | |_ | | | _| |_\/_| |_ | | |\ `.___.'\| |

 *      \___/| .__/ \___|_| |_|| ||____||____|| | ||_____||_____|| | | `._____.'| |

 *           | |               | |            | | |              | | |          | |

 *           |_|               | '------------' | '--------------' | '----------' |

 *                              '--------------' '----------------' '------------'

 *

 *  openHMC - An Open Source Hybrid Memory Cube Controller

 *  (C) Copyright 2014 Computer Architecture Group - University of Heidelberg

 *  www.ziti.uni-heidelberg.de

 *  B6, 26

 *  68159 Mannheim

 *  Germany

 *

 *  Contact: openhmc@ziti.uni-heidelberg.de

 *  http://ra.ziti.uni-heidelberg.de/openhmc

 *

 *   This source file is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   This source file is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public License

 *   along with this source file.  If not, see .

 *

 *

 */

//

//

// cag rgm rfs driver

//

//

`ifndef CAG_RGM_RFS_DRIVER_SV

`define CAG_RGM_RFS_DRIVER_SV

class cag_rgm_rfs_driver #(

                parameter ADDR_WIDTH       = 6,

                parameter READ_DATA_WIDTH  = 64,

                parameter WRITE_DATA_WIDTH = 64

        ) extends uvm_driver #(cag_rgm_transfer);

    virtual cag_rgm_rfs_if #(

                .ADDR_WIDTH(ADDR_WIDTH),

                .READ_DATA_WIDTH(READ_DATA_WIDTH),

                .WRITE_DATA_WIDTH(WRITE_DATA_WIDTH)

        ) rfs_if;

        cag_rgm_transfer rgm_item;

        `uvm_component_param_utils(cag_rgm_rfs_driver #(.ADDR_WIDTH(ADDR_WIDTH), .READ_DATA_WIDTH(READ_DATA_WIDTH), .WRITE_DATA_WIDTH(WRITE_DATA_WIDTH)))

        function new (string name="cag_rgm_rfs_driver", uvm_component parent);

                super.new(name, parent);

        endfunction : new

        function void build();

                super.build();

        endfunction : build

        function void assign_vi(virtual interface cag_rgm_rfs_if #(.ADDR_WIDTH(ADDR_WIDTH), .READ_DATA_WIDTH(READ_DATA_WIDTH), .WRITE_DATA_WIDTH(WRITE_DATA_WIDTH)) rfs_if);

                this.rfs_if = rfs_if;

        endfunction : assign_vi

        task do_reset();

                rfs_if.address          <= {ADDR_WIDTH {1'b0}};

                rfs_if.wen                      <= 1'b0;

                rfs_if.ren                      <= 1'b0;

                rfs_if.write_data       <= {WRITE_DATA_WIDTH {1'b0}};

                while (rfs_if.res_n == 0)

                        @( posedge rfs_if.clk );

        endtask : do_reset

        task run();

                #1;

                do_reset();

                forever

                begin

                        if (rfs_if.res_n == 0)

                                do_reset();

                        seq_item_port.get_next_item(rgm_item);

                        drive_item();

                        seq_item_port.item_done();

                end

        endtask : run

        task drive_item();

                //uvm_report_info(get_type_name(), $psprintf("start sending rgm_item:\n%s",rgm_item.sprint()));

                // Start sending:

                @(posedge rfs_if.clk);

                // Wait until start delay is over

                repeat (rgm_item.delay)

                        @(posedge rfs_if.clk);

                // start request

                rfs_if.address          <= rgm_item.address[3+(ADDR_WIDTH-1):3];

                rfs_if.write_data       <= rgm_item.data;

                rfs_if.wen                      <= (rgm_item.command == CAG_RGM_WRITE);

                rfs_if.ren                      <= (rgm_item.command == CAG_RGM_READ);

                @(posedge rfs_if.clk);

                rfs_if.wen                      <= 1'b0;

                rfs_if.ren                      <= 1'b0;

                while (rfs_if.access_done == 0)

                        @(posedge rfs_if.clk);

                @(posedge rfs_if.clk);

                // end request

                rfs_if.address          <= {ADDR_WIDTH {1'b0}};

                rfs_if.write_data       <= {WRITE_DATA_WIDTH {1'b0}};

        endtask : drive_item

endclass : cag_rgm_rfs_driver

`endif // CAG_RGM_RFS_DRIVER_SV