[params] Add SecureIbex option to simple system

Signed-off-by: Tom Roberts <tomroberts@lowrisc.org>

examples/simple_system/ibex_simple_system.core

@@ -64,6 +64,12 @@ parameters:
     default: 0
     description: "Enables third pipeline stage (EXPERIMENTAL)"
 
+  SecureIbex:
+    datatype: int
+    default: 0
+    paramtype: vlogparam
+    description: "Enables security hardening features (EXPERIMENTAL) [0/1]"
+
   PMPEnable:
     datatype: int
     default: 0
@@ -95,6 +101,7 @@ targets:
       - MultiplierImplementation
       - BranchTargetALU
       - WritebackStage
+      - SecureIbex
       - PMPEnable
       - PMPGranularity
       - PMPNumRegions

examples/simple_system/rtl/ibex_simple_system.sv

@@ -23,6 +23,7 @@ module ibex_simple_system (
   input IO_RST_N
 );
 
+  parameter bit               SecureIbex               = 1'b0;
   parameter bit               PMPEnable                = 1'b0;
   parameter int unsigned      PMPGranularity           = 0;
   parameter int unsigned      PMPNumRegions            = 4;
@@ -146,6 +147,7 @@ module ibex_simple_system (
   );
 
   ibex_core_tracing #(
+      .SecureIbex               ( SecureIbex               ),
       .PMPEnable                ( PMPEnable                ),
       .PMPGranularity           ( PMPGranularity           ),
       .PMPNumRegions            ( PMPNumRegions            ),