[dv/ibex] add support for DSim

Signed-off-by: Udi Jonnalagadda <udij@google.com>

dv/uvm/core_ibex/sim_makefrag_gen.py

@@ -88,6 +88,14 @@ def gen_xlm_makefrag():
 
     return 'COMPILE_OPTS += {0}'.format(xlm_compile_opts)
 
+def gen_dsim_makefrag():
+    dsim_compile_opts = run_ibex_config('dsim_compile_opts', [
+        '--ins_hier_path', 'core_ibex_tb_top',
+        '--string_define_prefix', 'IBEX_CFG_'
+    ])
+
+    return 'COMPILE_OPTS += {0}'.format(gen_dsim_makefrag)
+
 
 def main():
     argparser = argparse.ArgumentParser(description=(
@@ -98,7 +106,8 @@ def main():
         'vcs': gen_vcs_makefrag,
         'riviera': gen_riviera_makefrag,
         'xlm': gen_xlm_makefrag,
-        'questa': gen_questa_makefrag
+        'questa': gen_questa_makefrag,
+        'dsim': gen_dsim_makefrag
         }
 
     argparser.add_argument('sim',

dv/uvm/core_ibex/yaml/rtl_simulation.yaml

@@ -84,6 +84,7 @@
       - "mkdir -p <out>/dsim"
       - "<DSIM> -sv -work <out>/dsim
                 -genimage image
+                -timescale 1ns/1ps
                 +incdir+$UVM_HOME/src
                 $UVM_HOME/src/uvm_pkg.sv
                 +define+UVM

util/ibex_config.py

@@ -235,6 +235,9 @@ def main():
         SimOpts('xlm_opts', 'Xcelium compile',
                 lambda p, v: '-defparam ' + p + '=' + v,
                 lambda d, v: '-define ' + d + '=' + v, '.'),
+        SimOpts('dsim_compile_opts', 'DSim compile',
+                lambda p, v: '+define+' + p + '=' + v,
+                lambda d, v: None, '/'),
     ]
 
     argparser = argparse.ArgumentParser(description=(