Address constraint randomization

SystemVerilog
,
4

In reply to sk7799:

5% of 4Gb is 200Mb. But if you mean you want to randomly generate addresses within a set of bounds

class transaction;
  rand bit [31:0] address;
       bit [31:0] boundary = 32'h4000_0000; // 1GB
  constraint bounds { address dist {[0:boundary-1]:/ 5,
                                    [boundary:'1-boundary] :/ 90,
                                    ['1-boundary+1:'1] :/5 };
  }
endclass