add files to support coverage

sim/imperas.ic

@@ -1,6 +1,5 @@
 --override cpu/show_c_prefix=T
 --override cpu/unaligned=F
---override cpu/mstatus_FS=1
 --override cpu/ignore_non_leaf_DAU=1
 
 # Enable the Imperas instruction coverage

sim/wally-imperas-cov.do

@@ -0,0 +1,68 @@
+# wally.do 
+# SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
+#
+# Modification by Oklahoma State University & Harvey Mudd College
+# Use with Testbench 
+# James Stine, 2008; David Harris 2021
+# Go Cowboys!!!!!!
+#
+# Takes 1:10 to run RV64IC tests using gui
+
+onbreak {resume}
+
+# create library
+if [file exists work] {
+    vdel -all
+}
+vlib work
+
+# compile source files
+# suppress spurious warnngs about 
+# "Extra checking for conflicts with always_comb done at vopt time"
+# because vsim will run vopt
+
+# start and run simulation
+# remove +acc flag for faster sim during regressions if there is no need to access internal signals
+        # *** modelsim won't take `PA_BITS, but will take other defines for the lengths of DTIM_RANGE and IROM_LEN.  For now just live with the warnings.
+vlog +incdir+../config/$1 \
+     +incdir+../config/shared \
+     +define+USE_IMPERAS_DV \
+     +incdir+$env(IMPERAS_HOME)/ImpPublic/include/host \
+     +incdir+$env(IMPERAS_HOME)/ImpProprietary/include/host \
+     $env(IMPERAS_HOME)/ImpPublic/source/host/rvvi/rvvi-api-pkg.sv    \
+     $env(IMPERAS_HOME)/ImpPublic/source/host/rvvi/rvvi-trace.sv      \
+     $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/rvvi-pkg.sv   \
+     $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2api.sv  \
+     $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2log.sv  \
+     \
+     +define+INCLUDE_TRACE2COV +define+COVER_BASE_RV64I +define+COVER_LEVEL_DV_PR_EXT \
+       +define+COVER_RV64I \
+       +define+COVER_RV64C \
+       +define+COVER_RV64M \
+     +incdir+$env(IMPERAS_HOME)/ImpProprietary/source/host/riscvISACOV/source \
+     $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2cov.sv  \
+     \
+     ../testbench/testbench_imperas.sv \
+     ../testbench/common/*.sv   \
+     ../src/*/*.sv \
+     ../src/*/*/*.sv \
+     -suppress 2583 \
+     -suppress 7063  \
+     +acc
+vopt +acc work.testbench -G DEBUG=1 -o workopt 
+vsim workopt +nowarn3829  -fatal 7 \
+     -sv_lib $env(IMPERAS_HOME)/lib/Linux64/ImperasLib/imperas.com/verification/riscv/1.0/model \
+     +testDir=$env(TESTDIR) $env(OTHERFLAGS) +TRACE2COV_ENABLE=1 \
+     -do "coverage save -onexit ./riscv.ucdb"
+
+view wave
+#-- display input and output signals as hexidecimal values
+# add log -recursive /*
+# do wave.do
+
+run -all
+
+noview ../testbench/testbench_imperas.sv
+view wave
+
+quit -f

sim/wally-imperas.do

@@ -34,6 +34,7 @@ vlog +incdir+../config/$1 \
      $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/rvvi-pkg.sv   \
      $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2api.sv  \
      $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2log.sv  \
+     $env(IMPERAS_HOME)/ImpProprietary/source/host/rvvi/trace2cov.sv  \
      ../testbench/testbench_imperas.sv \
      ../testbench/common/*.sv   \
      ../src/*/*.sv \

testbench/testbench_imperas.sv

@@ -125,6 +125,7 @@ module testbench;
 
 `ifdef USE_IMPERAS_DV
     trace2log idv_trace2log(rvvi);
+    trace2cov idv_trace2cov(rvvi);
 
     // enabling of comparison types
     trace2api #(.CMP_PC      (1),