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Added requester agent mode
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Lines changed: 585 additions & 3 deletions

‎example/ahb_tb_example.f‎

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-incdir .
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-F ../ahb_agent.f
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ahb_tb_example_pkg.sv
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tb.sv

‎example/ahb_tb_example_pkg.sv‎

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/************************************************************************************
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* A full-featured AHB UVM Agent
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* Copyright (C) 2025 RISCY-Lib Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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************************************************************************************/
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package ahb_tb_example_pkg;
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import uvm_pkg::*;
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`include "uvm_macros.svh"
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import ahb_agent_pkg::*;
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`include "uvm_src/ahb_env_example.svh"
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`include "uvm_src/ahb_seq.svh"
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`include "uvm_src/ahb_test.svh"
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endpackage

‎example/tb.sv‎

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/************************************************************************************
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* A full-featured AHB UVM Agent
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* Copyright (C) 2025 RISCY-Lib Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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************************************************************************************/
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module tb();
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import uvm_pkg::*;
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`include "uvm_macros.svh"
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import ahb_tb_example_pkg::*;
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logic hclk;
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logic hresetn;
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`AHB_IF_INST(32, 32, 0, 4, 0, AHB, hclk, hresetn)
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initial begin
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hclk = 1'b0;
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forever begin
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#10ns;
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hclk = ~hclk;
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end
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end
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initial begin
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hresetn = 1'b0;
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repeat(3) begin
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@(posedge hclk);
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end
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hresetn = 1'b1;
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end
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initial begin
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run_test();
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end
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endmodule : tb

‎example/uvm_src/ahb_env_example.svh‎

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/************************************************************************************
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* A full-featured AHB UVM Agent
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* Copyright (C) 2025 RISCY-Lib Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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************************************************************************************/
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class ahb_env_example extends uvm_env;
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`uvm_component_utils(ahb_env_example)
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typedef ahb_agent#(
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.DATA_WIDTH(32),
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.ADDR_WIDTH(32),
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.HBURST_WIDTH(0),
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.HPROT_WIDTH(4),
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.HMASTER_WIDTH
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) example_agent;
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// Group: Class Properties
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////////////////////////////////////////////////////////////////////////////////////////////////
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example_agent completer_agent;
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example_agent requester_agent;
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// Group: Constructor
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////////////////////////////////////////////////////////////////////////////////////////////////
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// Constructor: new
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function new(string name="ahb_env_example", uvm_component parent=null);
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super.new(name, parent);
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endfunction : new
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virtual function void build_phase(uvm_phase phase);
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super.build_phase(phase);
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completer_agent = example_agent::type_id::create("completer_agent", this);
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completer_agent.m_cfg = ahb_agent_config::type_id::create("completer_cfg");
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completer_agent.m_cfg.agent_mode = AHB_COMPLETER_AGENT;
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completer_agent.m_cfg.is_active = UVM_ACTIVE;
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requester_agent = example_agent::type_id::create("requester_agent", this);
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requester_agent.m_cfg = ahb_agent_config::type_id::create("completer_cfg");
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requester_agent.m_cfg.agent_mode = AHB_REQUESTER_AGENT;
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requester_agent.m_cfg.is_active = UVM_ACTIVE;
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endfunction : build_phase
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endclass : ahb_env_example

‎example/uvm_src/ahb_seq.svh‎

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/************************************************************************************
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* A full-featured AHB UVM Agent
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* Copyright (C) 2025 RISCY-Lib Contributors
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*
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* This program is free software: you can redistribute it and/or modify
6+
* it under the terms of the GNU General Public License as published by
7+
* 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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************************************************************************************/
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// Class: ahb_tb_example_pkg.ahb_seq
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class ahb_seq extends uvm_sequence#(
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ahb_transaction#(
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.DATA_WIDTH(32),
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.ADDR_WIDTH(32),
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.HBURST_WIDTH(0),
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.HPROT_WIDTH(4),
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.HMASTER_WIDTH(0)
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)
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);
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`uvm_object_utils(ahb_seq)
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logic[31:0] addr_q[$];
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function new(string name="ahb_seq");
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super.new(name);
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endfunction : new
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virtual task body();
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repeat(10) begin
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ahb_transaction#(.DATA_WIDTH(32), .ADDR_WIDTH(32)) trans;
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trans = ahb_transaction#(.DATA_WIDTH(32), .ADDR_WIDTH(32))::type_id::create("trans");
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start_item(trans);
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trans.rand_type = AHB_SUBORDINATE_AGENT;
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void'(trans.randomize());
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`uvm_info(get_type_name(), $sformatf("Sending Transaction: %s", trans.sprint()), UVM_LOW)
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if (trans.write == AHB_WRITE)
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addr_q.push_back(trans.addr);
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finish_item(trans);
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end
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while(addr_q.size() > 0) begin
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ahb_transaction#(.DATA_WIDTH(32), .ADDR_WIDTH(32)) trans;
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trans = ahb_transaction#(.DATA_WIDTH(32), .ADDR_WIDTH(32))::type_id::create("trans");
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start_item(trans);
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trans.rand_type = AHB_SUBORDINATE_AGENT;
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trans.addr = addr_q.pop_front();
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trans.write = AHB_READ;
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`uvm_info(get_type_name(), $sformatf("Sending Transaction: %s", trans.sprint()), UVM_LOW)
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finish_item(trans);
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end
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endtask : body
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endclass : ahb_seq

‎example/uvm_src/ahb_test.svh‎

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/************************************************************************************
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* A full-featured AHB UVM Agent
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* Copyright (C) 2025 RISCY-Lib Contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
12+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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************************************************************************************/
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class ahb_test extends uvm_test;
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`uvm_component_utils(ahb_test)
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ahb_env_example m_env;
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ahb_requester_no_wait_states_seq#(.ADDR_WIDTH(32), .DATA_WIDTH(32)) requester_seq;
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ahb_seq completer_seq;
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function new(string name="ahb_test", uvm_component parent=null);
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super.new(name, parent);
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endfunction : new
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virtual function void build_phase(uvm_phase phase);
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super.build_phase(phase);
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m_env = ahb_env_example::type_id::create("m_env", this);
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endfunction : build_phase
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virtual task reset_phase(uvm_phase phase);
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phase.raise_objection(this);
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#100ns;
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phase.drop_objection(this);
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endtask : reset_phase
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virtual task main_phase(uvm_phase phase);
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phase.raise_objection(this);
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fork
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begin
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requester_seq = ahb_requester_no_wait_states_seq#(.ADDR_WIDTH(32), .DATA_WIDTH(32))::type_id::create("requester_seq");
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requester_seq.start(m_env.requester_agent.m_sequencer);
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end
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join_none
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completer_seq = ahb_seq::type_id::create("completer_seq");
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completer_seq.start(m_env.completer_agent.m_sequencer);
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phase.drop_objection(this);
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endtask : main_phase
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endclass : ahb_test

‎src/agent/ahb_driver.svh‎

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@@ -87,9 +87,9 @@ class ahb_driver#(`_AHB_AGENT_PARAM_DEFS) extends uvm_driver#(ahb_transaction#(`
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if (m_cfg.agent_mode == AHB_SUBORDINATE_AGENT) begin
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subordinate_run_phase(phase);
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end
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// else if (m_cfg.agent_mode == AHB_MANAGER_AGENT) begin
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// manager_run_phase(phase);
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// end
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else if (m_cfg.agent_mode == AHB_MANAGER_AGENT) begin
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manager_run_phase(phase);
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end
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else begin
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`uvm_error(
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get_type_name(),
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// Task: manager_run_phase
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// The UVM Run-Phase for a manager agent
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virtual task manager_run_phase(uvm_phase phase);
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ahb_transaction#(`_AHB_AGENT_PARAM_MAP) trans;
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int wait_states;
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fork
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forever begin
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m_vif.hready = m_vif.hreadyout;
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@(m_vif.hreadyout);
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end
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join_none
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m_vif.hrdata = '0;
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m_vif.hreadyout = 1'b1;
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m_vif.hresp = 1'b0;
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m_vif.hexokay = 1'b1;
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forever begin
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m_vif.hreadyout = 1'b1;
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seq_item_port.get_next_item(trans);
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m_vif.hreadyout = 1'b0;
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repeat(trans.wait_states) begin
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@(posedge m_vif.hclk);
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end
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if (trans.write == AHB_READ) begin
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m_vif.hrdata = trans.data;
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end
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m_vif.hreadyout = 1'b1;
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m_vif.hresp = trans.error;
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@(posedge m_vif.hclk);
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seq_item_port.item_done();
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end
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endtask : manager_run_phase
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endclass

‎src/agent/ahb_monitor.svh‎

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// The analysis port which this monitor uses to export to
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uvm_analysis_port #(ahb_transaction#(`_AHB_AGENT_PARAM_MAP)) ap;
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// Property: req_ap
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// The analysis port which sends request transactions to be used by reactive agent sequences
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uvm_analysis_port #(ahb_transaction#(`_AHB_AGENT_PARAM_MAP)) req_ap;
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// Reference: m_cfg
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// The agent config for this AHB agent
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ahb_agent_config m_cfg;
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break;
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end
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end
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if (m_cfg.agent_mode == AHB_MANAGER_AGENT) begin
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ahb_transaction#(`_AHB_AGENT_PARAM_MAP) req;
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req = trans.clone();
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req.data = m_vifg.hwdata;
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req_ap.write(req);
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end
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end
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end
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else begin

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