From a905dbedcc5d85bfec60c01c7ae934ef9f2f5e75 Mon Sep 17 00:00:00 2001
From: Howard Mao <zhehao.mao@gmail.com>
Date: Fri, 24 Apr 2020 17:08:58 -0700
Subject: [PATCH] add make rules for running simulator without executable

---
 common.mk               | 14 ++++++++++++++
 sims/vcs/Makefile       |  4 ++++
 sims/verilator/Makefile |  6 ++++++
 3 files changed, 24 insertions(+)

diff --git a/common.mk b/common.mk
index 696e0f83..b5a5bb07 100644
--- a/common.mk
+++ b/common.mk
@@ -136,6 +136,12 @@ run-binary-debug: $(sim_debug)
 
 run-fast: run-asm-tests-fast run-bmark-tests-fast
 
+run-none: $(output_dir)/none.out
+
+run-none-fast: $(output_dir)/none.run
+
+run-none-debug: $(output_dir)/none.vpd
+
 #########################################################################################
 # run assembly/benchmarks rules
 #########################################################################################
@@ -149,6 +155,14 @@ $(output_dir)/%.run: $(output_dir)/% $(sim)
 $(output_dir)/%.out: $(output_dir)/% $(sim)
 	(set -o pipefail && $(sim) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) $(PERMISSIVE_OFF) $< </dev/null 2> >(spike-dasm > $@) | tee $<.log)
 
+$(output_dir)/none.run: $(sim)
+	mkdir -p $(output_dir)
+	(set -o pipefail && $(sim) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(PERMISSIVE_OFF) $< </dev/null | tee $<.log) && touch $@
+
+$(output_dir)/none.out: $(sim)
+	mkdir -p $(output_dir)
+	(set -o pipefail && $(sim) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) $(PERMISSIVE_OFF) none </dev/null 2> >(spike-dasm > $@) | tee $(output_dir)/none.log)
+
 #########################################################################################
 # include build/project specific makefrags made from the generator
 #########################################################################################
diff --git a/sims/vcs/Makefile b/sims/vcs/Makefile
index c00819c2..f5b7e5db 100644
--- a/sims/vcs/Makefile
+++ b/sims/vcs/Makefile
@@ -102,6 +102,10 @@ $(sim_debug): $(sim_vsrcs) $(sim_common_files) $(dramsim_lib) $(EXTRA_SIM_REQS)
 $(output_dir)/%.vpd: $(output_dir)/% $(sim_debug)
 	(set -o pipefail && $(sim_debug) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) +vcdplusfile=$@ $(PERMISSIVE_OFF) $< </dev/null 2> >(spike-dasm > $<.out) | tee $<.log)
 
+$(output_dir)/none.vpd: $(sim_debug)
+	mkdir -p $(output_dir)
+	(set -o pipefail && $(sim_debug) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) +vcdplusfile=$@ $(PERMISSIVE_OFF) none </dev/null 2> >(spike-dasm > $(output_dir)/none.out) | tee $(output_dir)/none.log)
+
 #########################################################################################
 # general cleanup rule
 #########################################################################################
diff --git a/sims/verilator/Makefile b/sims/verilator/Makefile
index 0ab0016c..432169d6 100644
--- a/sims/verilator/Makefile
+++ b/sims/verilator/Makefile
@@ -145,6 +145,12 @@ $(output_dir)/%.vpd: $(output_dir)/% $(sim_debug)
 	vcd2vpd $@.vcd $@ > /dev/null &
 	(set -o pipefail && $(sim_debug) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) -v$@.vcd $(PERMISSIVE_OFF) $< </dev/null 2> >(spike-dasm > $<.out) | tee $<.log)
 
+$(output_dir)/none.vpd: $(sim_debug)
+	mkdir -p $(output_dir)
+	rm -f $@.vcd && mkfifo $@.vcd
+	vcd2vpd $@.vcd $@ > /dev/null &
+	(set -o pipefail && $(sim_debug) $(PERMISSIVE_ON) $(SIM_FLAGS) $(EXTRA_SIM_FLAGS) $(VERBOSE_FLAGS) -v$@.vcd $(PERMISSIVE_OFF) none </dev/null 2> >(spike-dasm > $(output_dir)/none.out) | tee $(output_dir)/none.log)
+
 #########################################################################################
 # general cleanup rule
 #########################################################################################