這里就不贅述UVM為何物了，做了半年多的FPGA設計驗證工作，按需求一直是用VHDL編寫測試程序，最近看了幾天UVM驗證方法學的書，感覺這是一種很好的驗證工具，現在開始UVM的學習，於是准備用ModelSim做一個Hello world，於是到網上隨便搜了段代碼，進行測試，見下方：
- `include "uvm_pkg.sv"
- module hello_world_example;
- import uvm_pkg::*;
- `include "uvm_macros.svh"
- initial begin
- `uvm_info ("info1","Hello World!", UVM_LOW)
- end
- endmodule: hello_world_example
可能是因為使用的測試工具比較新（ModelSim SE 10.0c）吧，直接可以編譯，然后進行仿真/運行，結果見下：
# Refreshing C:\t_uvm\work.hello_world_example
# Refreshing C:\t_uvm\work.uvm_pkg
# Loading sv_std.std
# Loading work.uvm_pkg
# Loading work.hello_world_example
# ** Warning: (vsim-3770) Failed to find user specified function 'uvm_hdl_check_path'. The search list was empty.
# Using -sv_lib, -sv_root, and -sv_liblist arguments can provide a search list
# of shared libraries that will be used to resolve user specified functions.
# Time: 0 ns Iteration: 0 Instance: /hello_world_example File: top.sv
……
# ** Warning: (vsim-3770) Failed to find user specified function 'uvm_glob_to_re'. The search list was empty.
# Using -sv_lib, -sv_root, and -sv_liblist arguments can provide a search list
# of shared libraries that will be used to resolve user specified functions.
# Time: 0 ns Iteration: 0 Instance: /hello_world_example File: top.sv
# ** Fatal: (vsim-160) c:/modeltech_10.0c/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh(27): Null foreign function pointer encountered when calling 'uvm_dpi_get_next_arg_c'
# Time: 0 ns Iteration: 0 Process: /uvm_pkg/#INITIAL#619 File: c:/modeltech_10.0c/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh
# Fatal error in Module uvm_pkg at D:/modeltech_10.0c/verilog_src/uvm-1.1d/src/dpi/uvm_svcmd_dpi.svh line 27
於是在個里上網查了些資料，一直調試到現在才可以使用，如下：
1、設置環境變量（下載好的UVM解壓到下面的UVM_HOME的目錄）
- set UVM_HOME c:/modeltech_10.0c/verilog_src/uvm-1.1d
- set MODEL_TECH c:/modeltech_10.0c/win32
2、編譯UVM_DPI動態鏈接庫(用的是gcc-4.2.1-mingw32vc9編譯器)
- c:/modeltech_10.0c/gcc-4.2.1-mingw32vc9/bin/g++.exe -g -DQUESTA -W -shared -Bsymbolic -I $MODEL_TECH/../include $UVM_HOME/src/dpi/uvm_dpi.cc -o $UVM_HOME/lib/uvm_dpi.dll $MODEL_TECH/mtipli.dll -lregex
3、編譯Hello_world_example源文件
- vlog +incdir+$UVM_HOME/src -L mtiAvm -L mtiOvm -L mtiUvm -L mtiUPF C:/t_uvm/top.sv
4、仿真Hello_world_example(需要調用剛剛編譯的uvm_dpi.dll)
- vsim -c -sv_lib $UVM_HOME/lib/uvm_dpi work.hello_world_example
最后運行得到下圖結果：
至此，Hello World終於出來了。