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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_ERROR_INJECTOR
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`define HMC_ERROR_INJECTOR
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class hmc_error_injector #(parameter NUM_LANES = 16) extends uvm_component;
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virtual hmc_sr_if#(.NUM_LANES(NUM_LANES)) ext_vif;
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virtual hmc_sr_if#(.NUM_LANES(NUM_LANES)) int_vif;
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hmc_cdr #(.NUM_LANES(NUM_LANES)) cdr;
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hmc_link_config link_config;
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hmc_local_link_config local_config;
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hmc_link_status link_status;
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logic [NUM_LANES - 1 : 0] current_value;
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int num_bitflips;
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int inserted_bitflips[];
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`uvm_component_param_utils_begin(hmc_error_injector#(.NUM_LANES(NUM_LANES)))
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`uvm_component_utils_end
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function new ( string name="hmc_error_injector", 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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uvm_config_db#(hmc_link_config)::set(this, "cdr","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#(hmc_local_link_config)::get(this, "", "local_config",local_config) ) begin
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`uvm_fatal(get_type_name(),"local_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, "", "ext_vif",ext_vif) ) begin
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this.ext_vif = ext_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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if(uvm_config_db#(virtual interface hmc_sr_if#(.NUM_LANES(NUM_LANES)))::get(this, "", "int_vif",int_vif) ) begin
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this.int_vif = int_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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if(!uvm_config_db#(hmc_link_status)::get(this, "", "link_status",link_status) ) begin
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`uvm_fatal(get_type_name(),"link_status is not set")
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end
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if (local_config.requester) begin
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uvm_config_db#(virtual interface hmc_sr_if#(.NUM_LANES(NUM_LANES)))::set(this, "cdr","vif",ext_vif);
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end else begin
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uvm_config_db#(virtual interface hmc_sr_if#(.NUM_LANES(NUM_LANES)))::set(this, "cdr","vif",int_vif);
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end
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set_config_int("cdr", "link_type", local_config.requester?REQUESTER:RESPONDER);
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cdr = hmc_cdr#(.NUM_LANES(NUM_LANES))::type_id::create("cdr", this);
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endfunction : build_phase
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function void connect_phase(uvm_phase phase);
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endfunction : connect_phase
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task run_phase(uvm_phase phase);
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#1ps;
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read();
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write();
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forever begin
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@(cdr.int_clk)
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read();
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if (local_config.lane_errors_enabled && link_status.current_state >= LINK_UP)
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inject_error();
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write();
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end
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endtask : run_phase
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function void read();
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if (local_config.requester) begin
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current_value = ext_vif.RXP;
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end else begin
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current_value = int_vif.TXP;
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end
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endfunction
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function void write();
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logic [NUM_LANES - 1 : 0] inv_value;
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foreach(current_value[i]) begin
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if (!(current_value[i] === 1'bz))
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inv_value[i] = ~current_value[i];
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else begin
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inv_value[i] = 1'bz;
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end
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end
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if (local_config.requester) begin
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int_vif.RXP = current_value;
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int_vif.RXN = inv_value;
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end else begin
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ext_vif.TXP = current_value;
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ext_vif.TXN = inv_value;
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end
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endfunction : write
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function void inject_error();
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int error_probability;
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error_prob_rand_succeeds : assert (std::randomize(error_probability)
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with {error_probability >= 0 && error_probability < 10000;});
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if (error_probability < local_config.bitflip_error_probability) begin
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num_error_rand_succeeds : assert(std::randomize(num_bitflips)
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with {num_bitflips>0 && num_bitflips
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`uvm_info(get_type_name(), $psprintf("Inserting %0d Bitflips in %s Link",num_bitflips, local_config.requester?"requester":"responder"), UVM_HIGH)
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bitflip(num_bitflips);
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end
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endfunction : inject_error
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function void bitflip(int bits);
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int pos = -1;
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int last_pos[int];
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for (int i= 0; i < bits; i++) begin
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while (last_pos[pos] == 1 || pos == -1)begin //-- inject bitflip only once per lane
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pos_randomization_succeeds : assert (std::randomize(pos) with {pos >= 0 && pos < NUM_LANES;});
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end
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last_pos[pos] = 1;
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current_value[pos] = ~current_value[pos];
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`uvm_info(get_type_name(), $psprintf("Inserting Bitflip at %d in %s Link", pos, local_config.requester?"requester":"responder"), UVM_HIGH)
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end
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endfunction : bitflip
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endclass : hmc_error_injector
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`endif
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