uvm里如何插入断点_UVM——控制打印信息

通过控制component打印信息的行为，提高日志的可读性。

uvm_component 直接继承自uvm_report_object，所以component继承了一些设置report的函数。

打印信息的宏有：`uvm_info(id,mess,verbosity).

`uvm_warning(id,mess)

`uvm_error(id,mess)

`uvm_fatal(id,mess)

1. 设置信息冗余度阈值 verbosity level

冗余度等于低于阈值的信息可以打印出来，否则不会显示。uvm_verbosityUVM_NONEReport is always printed. Verbosity level setting can not disable it.

UVM_LOWReport is issued if configured verbosity is set to UVM_LOW or above.

UVM_MEDIUMReport is issued if configured verbosity is set to UVM_MEDIUM or above.

UVM_HIGHReport is issued if configured verbosity is set to UVM_HIGH or above.

UVM_FULLReport is issued if configured verbosity is set to UVM_FULL or above.1

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8tyypedef enum{

UVM_NONE=0,

UVM_LOW=100,

UVM_MEDIUM=200,

UVM_HIGH=300,

UVM_FULL = 400,

UVM_DEBUG=500

} uvm_verbosity1

2$display("env's verbosity is %0d",env.get_verbosity_level());1

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3// set_report_verbosity_level(UVM_LOW)

// 设置某个component的verbosity level

env.set_report_verbosity_level(UVM_HIGH);1

2// set_report_verbosity_level_hier(UVM_LOW)

// 递归设置1

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11// set_report_id_verbosity("env",UVM_LOW)

//设置只打印某个id的报告，不是这个id的不打印

// 比如在env中有如下代码：

// `uvm_info("ID1","THIS IS ID1 UVM_LOW",UVM_LOW)

// `uvm_info("ID1","THIS IS ID1 UVM_HIGH",UVM_HIGH)

// `uvm_info("ID2","THIS IS ID2",UVM_LOW)

// 设置：

env.set_report_id_verbosity("env",UVM_LOW);

// 打印结果：

// THIS IS ID1 UVM_LOW

// 这个方法既对id进行过滤，也过滤verbosity level1// set_report_id_verbosity_hier("env",UVM_LOW)

也可以在仿真的时候添加仿真选项：1

2./simv +UVM_VERBOSITY=UVM_HIGH

// 为整个验证平台设置verbosity level

2. 重载打印信息严重性 severity

uvm有四种信息严重性：UVM_INFO

UVM_WARNING

UVM_ERROR

UVM_FATAL

这四种可以相互重载1

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3// set_report_severity_override(UVM_WARNING,UVM_ERROR)

env.set_report_severity_override(UVM_WARNING,UVM_ERROR);

// 将env的UVM_WARNING设置成UVM_ERROR1

2// set_report_severity_id_override(UVM_WARNING,UVM_ERROR)

// 针对component的某个id起作用

也可以在仿真时候设置，设置选项如下：1+uvm_set_severity=,,,

使用:1./simv +uvm_set_severity="uvm_base_top.env,env,UVM_WARNING,UVM_ERROR"

2.1 观察打印信息1UVM_INFO my_env.sv(17) @ 0: uvm_test_top.env [my_env] my_env is created !!

上面是`uvm_info宏输出的信息：UVM_INFO： 信息severity

my_env.sv(17)： code中的位置

@ 0： 仿真事件

uvm_test_top.env ： 层次路径

[my_env]： 设置的id

my_env is created !!：要打印的信息

3. 错误信息到一定数量结束仿真

当UVM_FATAL发生时，立即结束仿真；但UVM_ERROR则需要到了一定数量才会结束仿真。

可以设置达到几个error就结束仿真。1

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6// set_report_max_quit(5)

function void base_test::build_phase(uvm_phase phase);

super.build_phase(phase);

env = my_env::type_id::create("env", this);

set_report_max_quit_count(5); //5个ERROR结束仿真 $finish

endfunction

也可以在仿真选项中设置：1

2./simv +UVM_MAX_QUIT_COUNT=5,NO

// NO表示这个值不可以被后面的设置语句覆盖1

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3//get_max_quit_count()

// 返回int值，表示当前的最大推出值

// 如果返回0，表示无论多少个error都不会结束仿真

4. 设置计数目标

上一节中UVM_ERROR到达一定值后结束仿真，也可以把UVM_WARNING也加入计数目标，error和warning的达到最大值就退出仿真。1

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3// function void set_report_severity_action (uvm_severity severity,uvm_action action)

env.set_report_severity_action(UVM_WARNING,UVM_DISPLAY|UVM_COUNT);

// 将UVM_WARNING也加入到计数中。1// function void set_report_severity_action_hier (uvm_severity severity,uvm_action action)

也可以针对某个ID计数1

2//function void set_report_id_action (string id,uvm_action action)

//function void set_report_id_action_hier (string id,uvm_action action)

也可把id和severity联合起来进行设置1

2// function void set_report_severity_id_action (uvm_severity severity,string id,uvm_action action)

// function void set_report_severity_id_action_hier (uvm_severity severity,string id,uvm_action action)uvm_actiondescriptionUVM_NO_ACTIONNo action is taken

UVM_DISPLAYSends the report to the standard output

UVM_LOGSends the report to the file(s) for this (severity,id) pair

UVM_COUNTCounts the number of reports with the COUNT attribute. When this value reaches max_quit_count, the simulation terminates

UVM_EXITTerminates the simulation immediately.

UVM_CALL_HOOKCallback the report hook methods

UVM_STOPCauses $stop to be executed, putting the simulation into interactive mode.

5. UVM断点

执行到断点，停止仿真。

设置出现UVM_WARNING的时候停止仿真：1env.set_report_severity_action(UVM_WARNING,UVM_DISPLAY|UVM_STOP);

6. 将输出信息写入到文件1

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6function void set_report_severity_file (uvm_severity severity,UVM_FILE file)

function void set_report_id_file (string id,UVM_FILE file)

function void set_report_severity_id_file (uvm_severity severity,string id,UVM_FILE file)

function void set_report_severity_file_hier (uvm_severity severity,UVM_FILE file)

function void set_report_id_file_hier (string id,UVM_FILE file)

function void set_report_severity_id_file_hier (uvm_severity severity,string id,UVM_FILE file)

6.1 将不同severity的信息打印到不同的文件中。1

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38// 创建文件句柄

// 写入方式打开文件

//为不同severity设置保存文件

//设置打印的行为UVM_LOG

UVM_FILE info_log; // 创建文件句柄

UVM_FILE warning_log;

UVM_FILE error_log;

UVM_FILE fatal_log;

virtual function void connect_phase(uvm_phase phase);

info_log = $fopen("info.log", "w"); // 写入方式打开文件

warning_log = $fopen("warning.log", "w");

error_log = $fopen("error.log", "w");

fatal_log = $fopen("fatal.log", "w");

env.i_agt.drv.set_report_severity_file(UVM_INFO, info_log);//为不同severity设置保存文件

env.i_agt.drv.set_report_severity_file(UVM_WARNING, warning_log);

env.i_agt.drv.set_report_severity_file(UVM_ERROR, error_log);

env.i_agt.drv.set_report_severity_file(UVM_FATAL, fatal_log);

env.i_agt.drv.set_report_severity_action(UVM_INFO, UVM_DISPLAY | UVM_LOG);//设置打印的行为UVM_LOG

env.i_agt.drv.set_report_severity_action(UVM_WARNING, UVM_DISPLAY | UVM_LOG);

env.i_agt.drv.set_report_severity_action(UVM_ERROR, UVM_DISPLAY | UVM_COUNT | UVM_LOG);

env.i_agt.drv.set_report_severity_action(UVM_FATAL, UVM_DISPLAY | UVM_EXIT | UVM_LOG);

//env.i_agt.set_report_severity_file_hier(UVM_INFO, info_log);

//env.i_agt.set_report_severity_file_hier(UVM_WARNING, warning_log);

//env.i_agt.set_report_severity_file_hier(UVM_ERROR, error_log);

//env.i_agt.set_report_severity_file_hier(UVM_FATAL, fatal_log);

//env.i_agt.set_report_severity_action_hier(UVM_INFO, UVM_DISPLAY| UVM_LOG);

//env.i_agt.set_report_severity_action_hier(UVM_WARNING, UVM_DISPLAY| UVM_LOG);

//env.i_agt.set_report_severity_action_hier(UVM_ERROR, UVM_DISPLAY| UVM_COUNT | UVM_LOG);

//env.i_agt.set_report_severity_action_hier(UVM_FATAL, UVM_DISPLAY| | UVM_EXIT | UVM_LOG);

endfunction

virtual function void final_phase(uvm_phase phase);

$fclose(info_log);

$fclose(warning_log);

$fclose(error_log);

$fclose(fatal_log);

endfunction

6.2 将不同id的信息打印到不同的文件中。1

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18UVM_FILE driver_log;

UVM_FILE drv_log;

virtual function void connect_phase(uvm_phase phase);

driver_log = $fopen("driver.log", "w");

drv_log = $fopen("drv.log", "w");

env.i_agt.drv.set_report_severity_id_file(UVM_WARNING, "my_driver", driver_log);

env.i_agt.drv.set_report_severity_id_file(UVM_INFO, "my_drv", drv_log);

env.i_agt.drv.set_report_id_action("my_driver", UVM_DISPLAY| UVM_LOG);

env.i_agt.drv.set_report_id_action("my_drv", UVM_DISPLAY| UVM_LOG);

//env.i_agt.set_report_severity_id_file_hier(UVM_WARNING, "my_driver", driver_log);

//env.i_agt.set_report_severity_id_file_hier(UVM_INFO, "my_drv", drv_log);

//env.i_agt.set_report_id_action_hier("my_driver", UVM_DISPLAY| UVM_LOG);

//env.i_agt.set_report_id_action_hier("my_drv", UVM_DISPLAY| UVM_LOG);

endfunction

virtual function void final_phase(uvm_phase phase);

$fclose(driver_log);

$fclose(drv_log);

endfunction

7. 信息的打印行为 action

前面大都是通过设置action来控制打印信息。uvm_actiondescriptionUVM_NO_ACTIONNo action is taken

UVM_DISPLAYSends the report to the standard output

UVM_LOGSends the report to the file(s) for this (severity,id) pair

UVM_COUNTCounts the number of reports with the COUNT attribute. When this value reaches max_quit_count, the simulation terminates

UVM_EXITTerminates the simulation immediately.

UVM_CALL_HOOKCallback the report hook methods

UVM_STOPCauses $stop to be executed, putting the simulation into interactive mode.1

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10typedef enum

{

UVM_NO_ACTION = 'b000000,

UVM_DISPLAY = 'b000001,

UVM_LOG = 'b000010,

UVM_COUNT = 'b000100,

UVM_EXIT = 'b001000,

UVM_CALL_HOOK = 'b010000,

UVM_STOP = 'b100000

} uvm_action_type;

8. 打印UVM树结构1uvm_top.print_topology();

可以把它写在base_test中1

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4function void base_test::report_phase(uvm_phase phase);

super.report_phase(phase);

uvm_top.print_topology();

endfunction

打印输出1

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25UVM_INFO @ 43550000: reporter [UVMTOP] UVM testbench topology:

------------------------------------------------------------------

Name Type Size Value

------------------------------------------------------------------

uvm_test_top case0 - @460

env enviroment - @468

agt2mdl uvm_tlm_analysis_fifo #(T) - @492

analysis_export uvm_analysis_imp - @536

get_ap uvm_analysis_port - @527

get_peek_export uvm_get_peek_imp - @509

put_ap uvm_analysis_port - @518

put_export uvm_put_imp - @500

i_agt agent - @480

drv driver - @545

rsp_port uvm_analysis_port - @562

seq_item_port uvm_seq_item_pull_port - @553

mon_apb monitor_apb - @694

ap uvm_analysis_port - @702

sqr sequencer - @571

rsp_export uvm_analysis_export - @579

seq_item_export uvm_seq_item_pull_imp - @685

arbitration_queue array 0 -

lock_queue array 0 -

num_last_reqs integral 32 'd1

num_last_rsps integral 32 'd1