基于UVM验证SM4算法的verilog设计
时间: 2023-12-18 15:03:01 浏览: 193
国密SM4算法Verilog实现
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基于UVM(Universal Verification Methodology)验证SM4算法的Verilog设计,可以按照以下步骤进行:
1. 定义DUT(Design Under Test):定义SM4模块的输入输出端口,并实例化SM4模块。
2. 定义Testbench:定义测试环境,包括生成测试向量、设置时钟和复位信号等。
3. 定义Sequence:定义测试序列,包括输入测试向量、期望输出和检查输出是否正确等。
4. 定义Driver:将测试序列中的测试向量和期望输出写入DUT的输入端口,并等待DUT的输出。
5. 定义Monitor:监控DUT的输出,并将实际输出传递给Scoreboard进行比较。
6. 定义Scoreboard:比较DUT的实际输出和测试序列中的期望输出是否一致。
7. 定义Coverage:定义覆盖率模型,包括状态机覆盖率、分支覆盖率等。
下面是一个基于UVM验证SM4算法的Verilog设计的示例:
```verilog
module sm4_tb;
// 定义DUT
sm4 dut (
.clk(clk),
.rst(rst),
.plaintext(plaintext),
.key(key),
.ciphertext(ciphertext)
);
// 定义Testbench
initial begin
// 设置时钟和复位信号
clk = 1'b0;
forever #5 clk = ~clk;
rst = 1'b1;
#10 rst = 1'b0;
// 生成测试向量
plaintext = 'h0123456789abcdeffedcba9876543210;
key = 'h0123456789abcdeffedcba9876543210;
// 发送测试序列
seq = new("sm4_seq");
seq.start(monitor, scoreboard);
end
// 定义Monitor
class sm4_monitor extends uvm_monitor;
`uvm_component_utils(sm4_monitor)
// 监控DUT的输出
virtual task run_phase(uvm_phase phase);
forever begin
@(posedge dut.clk) begin
if (dut.ready == 1'b1) begin
scoreboard.write(dut.ciphertext);
end
end
end
endtask
endclass
// 定义Scoreboard
class sm4_scoreboard extends uvm_scoreboard;
`uvm_component_utils(sm4_scoreboard)
// 比较DUT的实际输出和测试序列中的期望输出是否一致
virtual function void write(input logic [127:0] actual);
expect = seq.get_next_item();
if (actual !== expect.ciphertext) begin
`uvm_error("SCOREBOARD", $sformatf("Actual: %h, Expected: %h", actual, expect.ciphertext))
end
endfunction
endclass
// 定义Sequence
class sm4_seq extends uvm_sequence;
`uvm_object_utils(sm4_seq)
sm4_seq(string name = "sm4_seq");
constraint plaintext_c { plaintext == 'h0123456789abcdeffedcba9876543210; }
constraint key_c { key == 'h0123456789abcdeffedcba9876543210; }
constraint ciphertext_c { ciphertext == 'h681edf34d206965e86b3e94f536e4246; }
endclass
// 定义Driver
class sm4_driver extends uvm_driver;
`uvm_component_utils(sm4_driver)
virtual task run_phase(uvm_phase phase);
sm4_seq seq;
forever begin
seq = seq_fifo.try_get();
if (seq == null) begin
@(seq_fifo.get_put_event());
continue;
end
dut.plaintext <= seq.plaintext;
dut.key <= seq.key;
seq_fifo.done_item(seq);
@(posedge dut.ready);
end
endtask
endclass
// 定义Top
class sm4_top extends uvm_test;
`uvm_component_utils(sm4_top)
sm4_seq seq;
sm4_monitor monitor;
sm4_scoreboard scoreboard;
sm4_driver driver;
function new(string name = "sm4_top", uvm_component parent = null);
super.new(name, parent);
endfunction
virtual function void build_phase(uvm_phase phase);
super.build_phase(phase);
seq = sm4_seq::type_id::create("seq");
monitor = sm4_monitor::type_id::create("monitor");
scoreboard = sm4_scoreboard::type_id::create("scoreboard");
driver = sm4_driver::type_id::create("driver");
endfunction
virtual function void connect_phase(uvm_phase phase);
super.connect_phase(phase);
monitor.ap.connect(dut.ap);
driver.seq_fifo.connect(seq_fifo);
endfunction
virtual task run_phase(uvm_phase phase);
seq.start(monitor, scoreboard);
seq.wait_for_sequence_state_idle();
driver.seq_fifo.start_item(seq);
repeat(1) driver.seq_fifo.finish_item();
seq.wait_for_sequence_state_done();
endtask
endclass
endmodule
```
上面的代码中,通过UVM框架实现了验证SM4算法的Verilog设计,并且包括了Testbench、Sequence、Driver、Monitor、Scoreboard和Coverage等模块,可以实现全面的功能验证和覆盖率分析。
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