Pass cfg from cmd to test

[1 Pass cfg from sh to case](#1 Pass cfg from sh to case)
[1.1 v a l u e value valueplusargs()`](#1.1 v a l u e value valueplusargs()`)
[1.2 uvm_config_int::get()<--->uvm_set_config_int/string/](#1.2 uvm_config_int::get()<--->uvm_set_config_int/string/)

The article's purpose is to solve the flexity; you can pass cfg to test by cmd directly; this is convinent for you to control or constraint the case;
Now,there are two common ways to do it;

1 Pass cfg from sh to case

1.1 v a l u e value valueplusargs()`

In any compenent,you use the usage;

sv 复制代码

        function void base_test:build_phase();
                super.build_phase(phase);
                if(!$value$plusargs("mask_mode=%0d",mask_mode)) begin
                        `uvm_error("base_test","mask_mode is set to default");
                end
        endfunction:build_phase

sh 复制代码

        #在末尾添加参数run_opt;
        -run_opt  +mask_mode=9

1.2 uvm_config_int::get()<--->uvm_set_config_int/string/

In any component,you should code in it; Principle: It will creats a diction,then put it in pool; you will use get it at any time;

you can put the code anywhere;

sv 复制代码

        function void base_test:build_phase();
                super.build_phase(phase);
                if(!uvm_config_int::get(this,"","mask_mode",mask_mode)) begin
                        `uvm_error("base_test","mask_mode is set to default");
                end
        endfunction:build_phase

sh 复制代码

#末尾添加参数
-run_opt  +uvm_set_config_int="uvm_test_top,mask_mode,12" &

Note the difference between the two ways;

Advantage: you can use it even under regression;

regression 复制代码

# Add in the regression.txt
TESTS += xx_test;+uvm_set_config_int="uvm_test_top,mask_mode,12"