Set block size to 1kB. Block size is set via plusarg +dlen=NNN

source/testbench.sv

@@ -1,9 +1,11 @@
 `timescale 1ps/1ps
 
-
 module testbench (input clock);
     localparam CPU_COUNT = 1024;
+    localparam DATA_ADDR = 32'h00010000;
+    localparam DATA_LEN = 1024;
 
+    logic [31:0] data_len;
     logic [CPU_COUNT-1:0] done_all;
 
     for (genvar ncpu = 0; ncpu < CPU_COUNT; ncpu = ncpu + 1) begin : cpus
@@ -15,12 +17,20 @@ module testbench (input clock);
 
         assign done_all[ncpu] = done;
 
-        md5calculator cpu(.clock, .reset, .done, .md5);
+        md5calculator cpu
+          (.clock, .reset, .done,
+           .md5_data_addr(DATA_ADDR),
+           .md5_data_len(data_len),
+           .md5(md5));
 
         initial
           for (int n = 0; n < (2 ** (cpu.rom.ADDR_WIDTH-2)); n += 1)
             cpu.rom.ram[n] = ncpu;
 
+        initial
+          if(!$value$plusargs("dlen=%d", data_len))
+            data_len = DATA_LEN;
+
         initial begin
             reset = 1'b1;
             repeat($urandom % 5 + 2) @(posedge clock);
@@ -36,7 +46,6 @@ module testbench (input clock);
     initial begin
         $display("--- BENCH BEGIN ---");
 
-
         repeat(5) @(posedge clock);
         while ((&done_all) == 1'b0) @(posedge clock);
         @(posedge clock);