[csrng/dv] Add a crosspoint for generate command

Add a crosspoint that crosses the generate command with both the command
length (clen) and generate length (glen) to ensure that generates with
additional data and more than one block of generated bits are
exercised.

Signed-off-by: Florian Glaser <[email protected]>

Author: glaserf

hw/ip/csrng/dv/cov/csrng_cov_if.sv

@@ -365,6 +365,16 @@ interface csrng_cov_if (
       ignore_bins invalid = binsof(cp_acmd) intersect { INV, GENB, GENU };
     }
 
+    clen_glen_cross: cross cp_acmd, cp_clen, cp_glen {
+      bins gen_glen_clen = binsof(cp_acmd) intersect { GEN } &&
+                           binsof(cp_clen) intersect { [1:$] } &&
+                           binsof(cp_glen) intersect { [2:$] };
+      // We are only interested in Generate commands in this crosspoint (and glen has no meaning
+      // for all other commands)
+      ignore_bins ignore_other_cmds = binsof(cp_acmd) intersect
+                                      { INS, UNI, UPD, RES, INV, GENB, GENU };
+    }
+
     flags_clen_acmd_cross: cross cp_acmd, cp_flags, cp_clen {
       // Use only Entropy Source seed
       bins ins_only_entropy_src_seed = binsof(cp_flags) intersect { MuBi4False } &&