init

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_agent.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_agent.sv
+
+    DESCRIPTION     
+
+ ****************************************************************************/
+
+`ifndef RESET_AGENT_SV
+`define RESET_AGENT_SV
+
+// reset sequencer
+typedef uvm_sequencer#(reset_transaction) reset_sequencer;
+    
+/**
+ * Class: reset_agent
+ */
+class reset_agent extends uvm_agent;
+    
+    // configuration object
+    reset_config cfg;
+    
+    // components
+    reset_sequencer seqr;
+    reset_driver    drv;
+    reset_monitor   mon;
+
+    // UVM factory registration
+    `uvm_component_utils_begin(reset_agent)
+        `uvm_field_enum(uvm_active_passive_enum, is_active, UVM_DEFAULT)
+    `uvm_component_utils_end
+    
+    // new - constructor
+    function new (string name = "reset_agent", uvm_component parent = null);
+        super.new(name, parent);
+    endfunction : new
+
+    // UVM build_phase
+    function void build_phase(uvm_phase phase);
+        super.build_phase(phase);
+        
+        // get configuration object from db
+        if(!uvm_config_db#(reset_config)::get(this, "", "reset_config", cfg)) begin
+            `uvm_info("NOCONFIG", "Using default reset_config", UVM_LOW)
+            cfg = reset_config::type_id::create("cfg");
+            uvm_config_db#(reset_config)::set(this, "*", "reset_config", cfg);
+        end
+        
+        // create driver and sequencer if agent is active
+        if(cfg.is_active == UVM_ACTIVE) begin
+            seqr = reset_sequencer::type_id::create("seqr", this);
+            drv = reset_driver::type_id::create("drv", this);
+        end
+        // always create monitor
+        mon = reset_monitor::type_id::create("mon", this);      
+    endfunction : build_phase
+    
+    // UVM connect_phase
+    function void connect_phase(uvm_phase phase);
+        super.connect_phase(phase);
+        // connect driver and sequencer if agent is active
+        if(cfg.is_active == UVM_ACTIVE) begin
+            drv.seq_item_port.connect(seqr.seq_item_export);
+        end
+    endfunction : connect_phase  
+  
+endclass : reset_agent
+
+`endif

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_config.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_config.sv
+
+    DESCRIPTION     configuration class for reset agent
+
+ ****************************************************************************/
+
+`ifndef RESET_CONFIG_SV
+`define RESET_CONFIG_SV
+/**
+ * Class: reset_config
+ */
+class reset_config extends uvm_object;
+
+    // reset value at the start of simulation
+    bit value_at_0 = 0;
+    // 1 = reset is active high; 0 = active low
+    bit active_high = 1;
+    // is agent active or passive
+    uvm_active_passive_enum is_active = UVM_ACTIVE;
+    // checks and coverage control
+    bit has_checks = 1;
+    bit has_coverage = 1;
+
+    // UVM factory registration
+    `uvm_object_utils_begin(reset_config)
+        `uvm_field_int(value_at_0, UVM_DEFAULT)
+        `uvm_field_int(active_high, UVM_DEFAULT)
+        `uvm_field_enum(uvm_active_passive_enum, is_active, UVM_DEFAULT)
+        `uvm_field_int(has_checks, UVM_DEFAULT)
+        `uvm_field_int(has_coverage, UVM_DEFAULT)
+    `uvm_object_utils_end
+
+    // new - constructor
+    function new(string name = "reset_config");
+        super.new(name);
+    endfunction : new
+    
+endclass : reset_config
+
+`endif
+

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_driver.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_driver.sv
+
+    DESCRIPTION     drives reset
+
+ ****************************************************************************/
+
+`ifndef RESET_DRIVER_SV
+`define RESET_DRIVER_SV
+
+/**
+ * Class: reset_driver
+ */
+class reset_driver extends uvm_driver #(reset_transaction);
+
+    // reset virtual interface
+    virtual reset_if vif;
+
+    // configuration
+    reset_config cfg;
+    
+    // UVM factory registration
+    `uvm_component_utils_begin(reset_driver)
+        `uvm_field_object(cfg, UVM_DEFAULT | UVM_REFERENCE)
+    `uvm_component_utils_end
+
+    // new - constructor
+    function new (string name = "reset_driver", uvm_component parent = null);
+        super.new(name, parent);
+    endfunction : new
+    
+    // UVM build_phase
+    virtual function void build_phase(uvm_phase phase);
+        super.build_phase(phase);
+        // get configuration object from db
+        if(!uvm_config_db#(reset_config)::get(this, "*", "reset_config", cfg))
+            `uvm_fatal("NOCONFIG",{"Config object must be set for: ",get_full_name(),".cfg"})
+    endfunction: build_phase
+    
+    // UVM connect_phase
+    virtual function void connect_phase(uvm_phase phase);
+        super.connect_phase(phase);
+        // get interface from db
+        if(!uvm_config_db#(virtual reset_if)::get(this, "", "reset_if", vif))
+            `uvm_fatal("NOVIF",{"virtual interface must be set for: ",get_full_name(),".vif"})    
+    endfunction : connect_phase    
+
+    // additional class methods
+    extern virtual task run_phase(uvm_phase phase);
+    extern virtual function void start_of_simulation_phase(uvm_phase phase);
+    extern virtual task drive_tr (reset_transaction tr);
+
+endclass : reset_driver
+
+// UVM start_of_simulation_phase
+function void reset_driver::start_of_simulation_phase(uvm_phase phase);
+    super.start_of_simulation_phase(phase);
+    vif.reset <= cfg.value_at_0;    // init reset
+endfunction
+
+// UVM run_phase
+task reset_driver::run_phase(uvm_phase phase);
+    forever begin
+        seq_item_port.get_next_item(req);
+        drive_tr(req);
+        seq_item_port.item_done();
+    end
+endtask : run_phase
+
+// Drives a transfer when an item is ready to be sent.
+task reset_driver::drive_tr (reset_transaction tr);
+    `uvm_info(  get_type_name(),
+                $sformatf("Driving reset: delay %0d clocks duration of %0d clocks",
+                tr.transmit_delay, tr.duration),
+                UVM_LOW)
+    // delay
+    if (tr.transmit_delay > 0) begin
+        repeat(tr.transmit_delay) @(posedge vif.clk);
+    end
+    // start reset
+    vif.reset <= cfg.active_high;
+    // duration
+    repeat(tr.duration) @(posedge vif.clk);
+    // drop reset
+    vif.reset <= ~cfg.active_high;
+    
+endtask : drive_tr
+
+`endif

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_if.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_if.sv
+
+    DESCRIPTION     reset interface
+
+ ****************************************************************************/
+
+`ifndef RESET_IF_SV
+`define RESET_IF_SV
+
+/**
+ * Interface: reset_if
+ */
+interface reset_if (input clk, output logic reset);
+
+endinterface : reset_if
+
+`endif

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_monitor.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_monitor.sv
+
+    DESCRIPTION     monitors interface for reset; collects coverage
+
+ ****************************************************************************/
+
+`ifndef RESET_MONITOR_SV
+`define RESET_MONITOR_SV
+
+/**
+ * Class: reset_monitor
+ */
+class reset_monitor extends uvm_monitor;
+
+    // reset virtual interface
+    virtual reset_if vif;
+
+    // configuration
+    reset_config cfg;
+
+    // TLM - from monitor to other components
+    uvm_analysis_port #(reset_transaction) item_collected_port;
+
+    // keep track of number of transactions
+    int unsigned num_transactions = 0;
+
+    // current transaction
+    reset_transaction tr_collected; 
+
+    // UVM factory registration
+    `uvm_component_utils_begin(reset_monitor)
+        `uvm_field_object(cfg, UVM_DEFAULT | UVM_REFERENCE)
+    `uvm_component_utils_end
+
+    // coverage
+    covergroup cg_reset;
+        // reset duration
+        cp_duration : coverpoint tr_collected.duration {
+            bins one_clk = {1};
+            bins other  = default;
+        }
+    endgroup : cg_reset;
+
+    // new - constructor
+    function new(string name = "reset_monitor", uvm_component parent = null);
+        super.new(name, parent);
+        item_collected_port = new("item_collected_port", this);
+        cg_reset = new();        
+    endfunction : new
+
+    // UVM build_phase
+    function void build_phase(uvm_phase phase);
+        super.build_phase(phase);
+        // get configuration object from db
+        if(!uvm_config_db#(reset_config)::get(this, "", "reset_config", cfg))
+            `uvm_fatal("NOCONFIG",{"Config object must be set for: ",get_full_name(),".cfg"})
+    endfunction: build_phase
+
+    // UVM connect_phase
+    function void connect_phase(uvm_phase phase);
+        super.connect_phase(phase);
+        // get interface from db
+        if(!uvm_config_db#(virtual reset_if)::get(this, "", "reset_if", vif))
+            `uvm_fatal("NOVIF",{"virtual interface must be set for: ",get_full_name(),".vif"})    
+    endfunction : connect_phase
+
+    // additional class methods
+    extern virtual task run_phase(uvm_phase phase);
+    extern virtual function void report_phase(uvm_phase phase);
+
+endclass : reset_monitor
+
+// UVM run_phase
+task reset_monitor::run_phase(uvm_phase phase);
+    forever begin
+        tr_collected = reset_transaction::type_id::create("tr_collected");
+        
+        // monitor reset
+        if(cfg.active_high) begin
+            @(posedge vif.reset);
+        end
+        else begin
+            @(negedge vif.reset);
+        end
+        `uvm_info(get_type_name(), "Reset observed", UVM_MEDIUM)
+        
+        tr_collected.duration = 1;
+        fork
+            // get duration
+            forever begin
+               @(posedge vif.clk) tr_collected.duration++; 
+            end
+            // monitor reset dropped
+            begin
+                if(cfg.active_high) begin
+                    @(negedge vif.reset);
+                end
+                else begin
+                    @(posedge vif.reset);
+                end
+            end
+        join_any
+        disable fork;
+        
+        item_collected_port.write(tr_collected); // TLM
+        // collect coverage if enabled
+        if(cfg.has_coverage == 1) begin
+            cg_reset.sample();
+        end
+        num_transactions++;
+        
+    end // forever begin
+endtask : run_phase
+
+// UVM report_phase
+function void reset_monitor::report_phase(uvm_phase phase);
+    // final report
+    `uvm_info(get_type_name(), $sformatf("Report: reset monitor collected %0d transfers", num_transactions), UVM_LOW);
+endfunction : report_phase
+
+`endif
+

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_pkg.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_pkg.sv
+
+    DESCRIPTION     package containing all parameters and includes
+
+ ****************************************************************************/
+
+`ifndef RESET_PKG_SV
+`define RESET_PKG_SV
+
+/**
+ * Package: reset_pkg
+ */
+package reset_pkg;
+
+    import uvm_pkg::*;
+    `include "uvm_macros.svh"
+
+    `include "reset_config.sv"
+    `include "reset_transaction.sv"
+    `include "reset_driver.sv"
+    `include "reset_monitor.sv"
+    `include "reset_agent.sv"
+    `include "sequences/reset_seq_lib.sv"
+
+endpackage : reset_pkg
+
+`include "reset_if.sv"
+
+`endif

code/Vezba 13 - prateci materijal/reset_agent/sv/reset_transaction.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_transaction.sv
+
+    DESCRIPTION     reset sequence item
+
+ ****************************************************************************/
+
+`ifndef RESET_TRANSACTION_SV
+`define RESET_TRANSACTION_SV
+
+/**
+ * Class: reset_transaction
+ */
+class reset_transaction extends uvm_sequence_item;
+    
+    // delay before asserting reset (#clk cycles)
+    rand int unsigned transmit_delay;
+    // duration of reset (#clk cycles)
+    rand int unsigned duration;
+    
+    // constraints
+    constraint c_transmit_delay { transmit_delay <= 10; }
+    constraint c_duration { duration inside {[0:5]}; }
+    
+    // UVM factory registration
+    `uvm_object_utils_begin(reset_transaction)
+        `uvm_field_int(transmit_delay, UVM_DEFAULT)
+        `uvm_field_int(duration, UVM_DEFAULT)
+    `uvm_object_utils_end
+    
+    // new - constructor
+    function new (string name = "reset_transaction");
+        super.new(name);
+    endfunction : new
+
+endclass : reset_transaction
+
+`endif

code/Vezba 13 - prateci materijal/reset_agent/sv/sequences/reset_base_seq.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_base_seq.sv
+
+    DESCRIPTION     base sequence
+
+ ****************************************************************************/
+
+`ifndef RESET_BASE_SEQ_SV
+`define RESET_BASE_SEQ_SV
+
+/**
+ * Class: reset_base_seq
+ */
+class reset_base_seq extends uvm_sequence #(reset_transaction, reset_transaction);
+
+    // UVM factory registration
+    `uvm_object_utils(reset_base_seq)
+
+    // new - constructor
+    function new(string name = "reset_base_seq");
+        super.new(name);
+    endfunction : new
+
+endclass : reset_base_seq
+
+`endif
+

code/Vezba 13 - prateci materijal/reset_agent/sv/sequences/reset_seq.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_seq.sv
+
+    DESCRIPTION     sequence for assertion reset
+
+ ****************************************************************************/
+
+`ifndef RESET_SEQ_SV
+`define RESET_SEQ_SV
+
+/**
+ * Class: reset_seq
+ */
+class reset_seq extends reset_base_seq;
+    
+    // delay before asserting reset (#clk cycles)
+    rand int unsigned transmit_del;
+    // duration of reset (#clk cycles)
+    rand int unsigned duration_time;    
+    
+    // UVM factory registration
+    `uvm_object_utils(reset_seq)
+    
+    // constraints
+    constraint c_transmit_delay { transmit_del <= 10; }
+    constraint c_duration_time { duration_time inside {[1:5]}; }
+
+    // new - constructor
+    function new(string name = "reset_seq");
+        super.new(name);
+    endfunction : new
+    
+    // sequence generation logic in body
+    virtual task body();
+        // send one transaction
+        `uvm_do_with(req, { req.duration == duration_time;
+                            req.transmit_delay == transmit_del; } )         
+    endtask : body
+    
+endclass : reset_seq
+
+`endif
+

code/Vezba 13 - prateci materijal/reset_agent/sv/sequences/reset_seq_lib.sv

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+/****************************************************************************
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+    |F|u|n|c|t|i|o|n|a|l| |V|e|r|i|f|i|c|a|t|i|o|n| |o|f| |H|a|r|d|w|a|r|e|
+    +-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+ +-+-+-+-+-+-+-+-+
+
+    FILE            reset_seq_lib.sv
+
+    DESCRIPTION     sequence includes
+
+ ****************************************************************************/
+
+`ifndef RESET_SEQ_LIB_SV
+`define RESET_SEQ_LIB_SV
+
+`include "sequences/reset_base_seq.sv"
+`include "sequences/reset_seq.sv"
+    
+`endif