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/*
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* .--------------. .----------------. .------------.
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* | .------------. | .--------------. | .----------. |
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* | | ____ ____ | | | ____ ____ | | | ______ | |
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* | ||_ || _|| | ||_ \ / _|| | | .' ___ || |
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* ___ _ __ ___ _ __ | | | |__| | | | | | \/ | | | |/ .' \_|| |
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* / _ \| '_ \ / _ \ '_ \ | | | __ | | | | | |\ /| | | | || | | |
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* (_) | |_) | __/ | | || | _| | | |_ | | | _| |_\/_| |_ | | |\ `.___.'\| |
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* \___/| .__/ \___|_| |_|| ||____||____|| | ||_____||_____|| | | `._____.'| |
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* | | | | | | | | | | | |
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* |_| | '------------' | '--------------' | '----------' |
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* '--------------' '----------------' '------------'
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*
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* openHMC - An Open Source Hybrid Memory Cube Controller
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* (C) Copyright 2014 Computer Architecture Group - University of Heidelberg
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* www.ziti.uni-heidelberg.de
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* B6, 26
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* 68159 Mannheim
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* Germany
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*
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* Contact: openhmc@ziti.uni-heidelberg.de
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* http://ra.ziti.uni-heidelberg.de/openhmc
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*
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* This source file is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This source file is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this source file. If not, see .
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*
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*
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*/
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`ifndef hmc_cdr_SV
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`define hmc_cdr_SV
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class hmc_cdr #(parameter NUM_LANES = 16) extends uvm_component;
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event int_clk;
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virtual hmc_sr_if#(.NUM_LANES(NUM_LANES)) vif;
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hmc_link_config link_config;
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link_type_t link_type = REQUESTER;
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`uvm_component_param_utils_begin(hmc_cdr#(.NUM_LANES(NUM_LANES)))
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`uvm_field_enum(link_type_t, link_type, UVM_DEFAULT)
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`uvm_component_utils_end
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function new ( string name="hmc_cdr", uvm_component parent );
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super.new(name, parent);
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endfunction : new
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function void build_phase(uvm_phase phase);
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super.build_phase(phase);
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if(uvm_config_db#(hmc_link_config )::get(this, "", "link_config",link_config) ) begin
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this.link_config = link_config;
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end else begin
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`uvm_fatal(get_type_name(),"link_config is not set")
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end
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if(uvm_config_db#(virtual interface hmc_sr_if#(.NUM_LANES(NUM_LANES)))::get(this, "", "vif",vif) ) begin
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this.vif = vif;
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end else begin
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`uvm_fatal(get_type_name(),"vif is not set")
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end
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endfunction : build_phase
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task run_phase(uvm_phase phase);
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bit timeout = 0;
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time timeout_length;
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time wait_time;
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super.run_phase(phase);
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forever begin
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@(posedge vif.P_RST_N); //-- wait for leaving reset state
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fork
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begin
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@(negedge vif.P_RST_N); //-- entering reset state
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end
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begin
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timeout_length = link_config.bit_time;
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forever begin
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fork
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begin
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if(link_type == REQUESTER)
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@(vif.RXP);
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else
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@(vif.TXP);
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end
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begin
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#(timeout_length + 1ps);
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timeout = 1;
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end
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join_any
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disable fork;
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case (link_config.bit_time)
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100ps : wait_time = 50ps;
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80ps : wait_time = 40ps;
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66ps : wait_time = 30ps;
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endcase
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timeout_length = wait_time;
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if(timeout == 1)
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wait_time -= 1ps;
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#(wait_time);
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-> int_clk;
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timeout = 0;
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end
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end
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join_any;
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disable fork;
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end
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endtask : run_phase
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endclass :hmc_cdr
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`endif //hmc_cdr_SV
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