Enable ECC in ICache tests

Eventually we probably want to make this configurable but, for now,
enable it unconditionally.

dv/uvm/icache/dv/ibex_icache_sim.core

@@ -18,8 +18,17 @@ filesets:
 
 targets:
   sim:
+    parameters:
+      - ICacheECC
     filesets:
       - files_rtl
       - files_dv
     toplevel: tb
     default_tool: vcs
+
+parameters:
+  ICacheECC:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enable ECC protection in instruction cache"

dv/uvm/icache/dv/ibex_icache_sim_cfg.hjson

@@ -20,10 +20,15 @@
   // Testplan hjson file.
   testplan: "{proj_root}/dv/uvm/icache/data/ibex_icache_testplan.hjson"
 
-
   // Import additional common sim cfg files.
-  import_cfgs: [// Project wide common sim cfg file
-                "{proj_root}/dv/uvm/data/common_sim_cfg.hjson"]
+  import_cfgs: [
+      // Project wide common sim cfg file
+      "{proj_root}/dv/uvm/data/common_sim_cfg.hjson",
+
+      // Configuration options that should apply after the settings in
+      // common_sim_cfg.
+      "{proj_root}/dv/uvm/icache/dv/late_cfg.hjson"
+  ]
 
   // Default iterations for all tests - each test entry can override this.
   reseed: 50

dv/uvm/icache/dv/late_cfg.hjson

@@ -0,0 +1,9 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+{
+  // Set any fusesoc parameters by appending to sv_flist_gen_opts
+  //
+  // We want to enable ICache ECC (needed for the ECC test below)
+  sv_flist_gen_opts: ["--ICacheECC=1"]
+}

dv/uvm/icache/dv/tb/tb.sv

@@ -2,7 +2,9 @@
 // Licensed under the Apache License, Version 2.0, see LICENSE for details.
 // SPDX-License-Identifier: Apache-2.0
 //
-module tb;
+module tb #(
+  parameter bit ICacheECC = 1'b0
+);
   // dep packages
   import uvm_pkg::*;
   import dv_utils_pkg::*;
@@ -22,7 +24,9 @@ module tb;
   ibex_icache_mem_if  mem_if  (.clk(clk), .rst_n(rst_n));
 
   // dut
-  ibex_icache dut (
+  ibex_icache #(
+    .ICacheECC (ICacheECC)
+  ) dut (
     .clk_i           (clk),
     .rst_ni          (rst_n),