UVM——通过一个简单的testbench来了解UVM组件的phase执行顺序
先写好一个top.sv
查看代码
// 导入VCS或者Modelsim自带的UVM库和宏
`include "uvm_macros.svh"
import uvm_pkg::*;
// 下面这些sv都是接下来要写的
`include "driver.sv"
`include "monitor.sv"
`include "agent.sv"
`include "env.sv"
`include "test.sv"
module top;
initial
run_test();
endmodule
再把test.sv写好。
每个phase都只有简单地打印信息，方便查看各个phase执行的顺序
查看代码
class test1 extends uvm_test;
`uvm_component_utils(test1)
env t_env;
function new(string name = "test1", uvm_component parent = null);
super.new(name, parent);
endfunction: new
function void build_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Build", UVM_LOW);
t_env = env::type_id::create("t_env", this);
endfunction: build_phase
function void connect_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Connect", UVM_LOW);
endfunction
function void end_of_elaboration_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "End_of_elaboration", UVM_LOW);
endfunction
function void start_of_simulation_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Start_of_simulation", UVM_LOW);
endfunction
task run_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Run", UVM_LOW);
endtask
task main_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Main", UVM_LOW);
endtask
function void extract_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Extract", UVM_LOW);
endfunction
function void check_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Check", UVM_LOW);
endfunction
function void report_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Report", UVM_LOW);
endfunction
function void final_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Final", UVM_LOW);
endfunction
endclassenv.sv
class env extends uvm_env;
`uvm_component_utils(env)
agent ag1;
agent ag2;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Build", UVM_LOW);
ag1 = agent::type_id::create("ag1",this);
ag2 = agent::type_id::create("ag2",this);
endfunction: build_phase
function void connect_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Connect", UVM_LOW);
endfunction
function void end_of_elaboration_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "End_of_elaboration", UVM_LOW);
endfunction
function void start_of_simulation_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Start_of_simulation", UVM_LOW);
endfunction
task run_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Run", UVM_LOW);
endtask
task main_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Main", UVM_LOW);
endtask
function void extract_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Extract", UVM_LOW);
endfunction
function void check_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Check", UVM_LOW);
endfunction
function void report_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Report", UVM_LOW);
endfunction
function void final_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Final", UVM_LOW);
endfunction
endclassagent.sv
查看代码
class agent extends uvm_agent;
`uvm_component_utils(agent)
protected uvm_active_passive_enum is_active = UVM_ACTIVE;
monitor mon;
driver drv;
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
// super.build_phase(phase);
uvm_report_info(get_full_name(), "Build", UVM_LOW);
mon = monitor::type_id::create("mon", this);
drv = driver::type_id::create("drv", this);
endfunction: build_phase
function void connect_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Connect", UVM_LOW);
endfunction
function void end_of_elaboration_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "End_of_elaboration", UVM_LOW);
endfunction
function void start_of_simulation_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Start_of_simulation", UVM_LOW);
endfunction
task run_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Run", UVM_LOW);
endtask
task main_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Main", UVM_LOW);
endtask
function void extract_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Extrnct", UVM_LOW);
endfunction
function void check_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Check", UVM_LOW);
endfunction
function void report_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Report", UVM_LOW);
endfunction
function void final_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Final", UVM_LOW);
endfunction
endclassdriver.sv
查看代码
class driver extends uvm_driver;
`uvm_component_utils(driver)
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Build", UVM_LOW);
endfunction: build_phase
function void connect_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Connect", UVM_LOW);
endfunction
function void end_of_elaboration_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "End_of_elaboration", UVM_LOW);
endfunction
function void start_of_simulation_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Start_of_simulation", UVM_LOW);
endfunction
task run_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Run", UVM_LOW);
endtask
task main_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Main", UVM_LOW);
endtask
function void extract_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Extract", UVM_LOW);
endfunction
function void check_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Check", UVM_LOW);
endfunction
function void report_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Report", UVM_LOW);
endfunction
function void final_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Final", UVM_LOW);
endfunction
endclassmonitor.sv
查看代码
class monitor extends uvm_monitor;
`uvm_component_utils(monitor)
function new(string name, uvm_component parent);
super.new(name, parent);
endfunction
function void build_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Build", UVM_LOW);
endfunction: build_phase
function void connect_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Connect", UVM_LOW);
endfunction
function void end_of_elaboration_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "End_of_elaboration", UVM_LOW);
endfunction
function void start_of_simulation_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Start_of_simulation", UVM_LOW);
endfunction
task run_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Run", UVM_LOW);
endtask
task main_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Main", UVM_LOW);
endtask
function void extract_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Extract", UVM_LOW);
endfunction
function void check_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Check", UVM_LOW);
endfunction
function void report_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Report", UVM_LOW);
endfunction
function void final_phase(uvm_phase phase);
uvm_report_info(get_full_name(), "Final", UVM_LOW);
endfunction
endclass使用Modelsim做一下测试：
ModelSim> cd <dir> // 程序所在目录
ModelSim> vlib work
ModelSim> vlog -sv -mfcu top.sv
ModelSim> vsim top +UVM_TESTNAME=test1
ModelSim> run检查一下输出
查看代码
# Reading C:/modeltech_10.1a/tcl/vsim/pref.tcl
# // ModelSim SE 10.1a Feb 22 2012
# //
# // Copyright 1991-2012 Mentor Graphics Corporation
# // All Rights Reserved.
# //
# // THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION
# // WHICH IS THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS
# // LICENSORS AND IS SUBJECT TO LICENSE TERMS.
# //
cd E:/CH02_3_LAB
vlib work
vlog -sv -mfcu top.sv
# Model Technology ModelSim SE vlog 10.1a Compiler 2012.02 Feb 22 2012
# ** Note: (vlog-2286) Using implicit +incdir+C:/modeltech_10.1a/uvm-1.1a/../verilog_src/uvm-1.1a/src from import uvm_pkg
#
# ** Warning: driver.sv(1): (vlog-2181) Use of a parameterized class uvm_driver as a type creates a default specialization.
#
# -- Compiling package top_sv_unit
# -- Importing package mtiUvm.uvm_pkg (uvm-1.1a Built-in)
# ** Warning: driver.sv(1): (vlog-2181) Use of a parameterized class uvm_driver as a type creates a default specialization.
#
# -- Compiling module top
# ** Warning: driver.sv(1): (vlog-2181) Use of a parameterized class uvm_driver as a type creates a default specialization.
#
#
# Top level modules:
# top
vsim top +UVM_TESTNAME=test1
# vsim +UVM_TESTNAME=test1 top
# ** Note: (vsim-3812) Design is being optimized...
#
# Loading sv_std.std
# Loading mtiUvm.uvm_pkg
# Loading work.top_sv_unit(fast)
# Loading work.top(fast)
# Loading mtiUvm.questa_uvm_pkg(fast)
# Loading C:\modeltech_10.1a\uvm-1.1a\win32\uvm_dpi.dll
run
# ----------------------------------------------------------------
# UVM-1.1a
# (C) 2007-2011 Mentor Graphics Corporation
# (C) 2007-2011 Cadence Design Systems, Inc.
# (C) 2006-2011 Synopsys, Inc.
# (C) 2011 Cypress Semiconductor Corp.
# ----------------------------------------------------------------
#
# *********** IMPORTANT RELEASE NOTES ************
#
# You are using a version of the UVM library that has been compiled
# with `UVM_NO_DEPRECATED undefined.
# See http://www.accellera.org/activities/vip/release_notes_11a for more details.
#
# You are using a version of the UVM library that has been compiled
# with `UVM_OBJECT_MUST_HAVE_CONSTRUCTOR undefined.
# See http://www.accellera.org/activities/vip/mantis3770 for more details.
#
# (Specify +UVM_NO_RELNOTES to turn off this notice)
#
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(215) @ 0: reporter [Questa UVM] QUESTA_UVM-1.2
# UVM_INFO verilog_src/questa_uvm_pkg-1.2/src/questa_uvm_pkg.sv(217) @ 0: reporter [Questa UVM] questa_uvm::init(+struct)
# UVM_INFO @ 0: reporter [RNTST] Running test test1...
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Build
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Build
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Connect
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Connect
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Connect
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] End_of_elaboration
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Start_of_simulation
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Run
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Run
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Run
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Main
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Main
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Extract
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Extranct
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Extract
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Check
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Check
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Check
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Report
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Report
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Report
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Report
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Report
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Report
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Report
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Report
# UVM_INFO @ 0: uvm_test_top [uvm_test_top] Final
# UVM_INFO @ 0: uvm_test_top.t_env [uvm_test_top.t_env] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag1 [uvm_test_top.t_env.ag1] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.drv [uvm_test_top.t_env.ag1.drv] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag1.mon [uvm_test_top.t_env.ag1.mon] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag2 [uvm_test_top.t_env.ag2] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.drv [uvm_test_top.t_env.ag2.drv] Final
# UVM_INFO @ 0: uvm_test_top.t_env.ag2.mon [uvm_test_top.t_env.ag2.mon] Final
#
# --- UVM Report Summary ---
#
# ** Report counts by severity
# UVM_INFO : 83
# UVM_WARNING : 0
# UVM_ERROR : 0
# UVM_FATAL : 0
# ** Report counts by id
# [Questa UVM] 2
# [RNTST] 1
# [uvm_test_top] 10
# [uvm_test_top.t_env] 10
# [uvm_test_top.t_env.ag1] 10
# [uvm_test_top.t_env.ag1.drv] 10
# [uvm_test_top.t_env.ag1.mon] 10
# [uvm_test_top.t_env.ag2] 10
# [uvm_test_top.t_env.ag2.drv] 10
# [uvm_test_top.t_env.ag2.mon] 10
# ** Note: $finish : C:/modeltech_10.1a/win32/../verilog_src/uvm-1.1a/src/base/uvm_root.svh(408)
# Time: 0 ns Iteration: 224 Instance: /top
# 1
# Break in Task uvm_pkg/uvm_root::run_test at C:/modeltech_10.1a/win32/../verilog_src/uvm-1.1a/src/base/uvm_root.svh line 408
从最后的打印结果很容易了解到各个phase的执行情况是这样的：
- 除了build和final是自顶向下的，其他phase都是自下而上的。
- 并且每个块中的phase是按顺序执行的。
