From 9c70029f3e690e727b1ca88cfd879761c681015b Mon Sep 17 00:00:00 2001
From: Phil <fabaulin_2@edu.hse.ru>
Date: Tue, 7 Jul 2026 17:47:03 +0300
Subject: [PATCH] infra: add questa makefile

---
 scripts/questa.mk | 96 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 scripts/questa.mk

diff --git a/scripts/questa.mk b/scripts/questa.mk
new file mode 100644
index 0000000..59a0a1e
--- /dev/null
+++ b/scripts/questa.mk
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: MIT
+###################################################################
+# Questa/ModelSim simulation helper
+#
+# Expected variables from the project Makefile:
+#   SYN_FILES    - RTL sources
+#   TB_FILES     - testbench sources
+#   INC_FILES    - include files, optional
+#   SIM_TOP      - simulation top module
+#   SIM_DEFS     - defines, optional
+#   SIM_RUNTIME  - run time, for example "10000 us" or "-all"
+#
+# Useful overrides:
+#   make sim-questa XILINX_VIVADO=/opt/Xilinx/Vivado/2024.2
+#   make sim-questa-gui
+###################################################################
+
+.PHONY: sim-questa sim-questa-gui questa-clean questa-xpm-clean
+
+VLIB ?= vlib
+VMAP ?= vmap
+VLOG ?= vlog
+VSIM ?= vsim
+
+QUESTA_WORK_LIB ?= work
+QUESTA_XPM_LIB  ?= xpm
+QUESTA_DIR      ?= questa_build
+QUESTA_TRANSCRIPT ?= transcript
+XILINX_VIVADO=/tools/Xilinx/2025.1/Vivado
+SIM_RUNTIME ?= 10000 us
+QUESTA_RUN ?= run $(SIM_RUNTIME)
+
+# XPM is needed by this design because accum.sv uses xpm_memory_sdpram and
+# out_axis_fifo.sv uses xpm_fifo_async. Point XILINX_VIVADO to your Vivado
+# install if it is not already exported by settings64.sh.
+QUESTA_USE_XPM ?= 1
+
+QUESTA_XPM_SRC = \
+	$(XILINX_VIVADO)/data/ip/xpm/xpm_cdc/hdl/xpm_cdc.sv \
+	$(XILINX_VIVADO)/data/ip/xpm/xpm_memory/hdl/xpm_memory.sv \
+	$(XILINX_VIVADO)/data/ip/xpm/xpm_fifo/hdl/xpm_fifo.sv
+
+QUESTA_GLBL_SRC = $(XILINX_VIVADO)/data/verilog/src/glbl.v
+
+QUESTA_DEFS = $(foreach d,$(SIM_DEFS),+define+$(d))
+QUESTA_INC_DIRS = $(sort $(dir $(SYN_FILES) $(TB_FILES) $(INC_FILES)))
+QUESTA_INCS = $(foreach d,$(QUESTA_INC_DIRS),+incdir+$(d))
+QUESTA_LIBS = $(if $(filter 1,$(QUESTA_USE_XPM)),-L $(QUESTA_XPM_LIB),)
+QUESTA_SOURCES = $(SYN_FILES) $(TB_FILES) $(if $(wildcard $(QUESTA_GLBL_SRC)),$(QUESTA_GLBL_SRC),)
+
+QUESTA_GLBL_TOP = $(if $(wildcard $(QUESTA_GLBL_SRC)),$(QUESTA_WORK_LIB).glbl,)
+
+
+$(QUESTA_DIR):
+	mkdir -p $@
+
+$(QUESTA_DIR)/sources.f: Makefile | $(QUESTA_DIR)
+	@rm -f $@
+	@for inc in $(QUESTA_INCS); do echo $$inc >> $@; done
+	@for src in $(QUESTA_SOURCES); do echo $$src >> $@; done
+
+$(QUESTA_DIR)/xpm.stamp: | $(QUESTA_DIR)
+	@if [ "$(QUESTA_USE_XPM)" = "1" ]; then \
+		if [ -z "$(XILINX_VIVADO)" ]; then \
+			echo "ERROR: XILINX_VIVADO is not set. Source Vivado settings64.sh or pass XILINX_VIVADO=/path/to/Vivado/<version>."; \
+			exit 1; \
+		fi; \
+		for src in $(QUESTA_XPM_SRC); do \
+			if [ ! -f $$src ]; then \
+				echo "ERROR: XPM source not found: $$src"; \
+				exit 1; \
+			fi; \
+		done; \
+		$(VLIB) $(QUESTA_XPM_LIB); \
+		$(VMAP) $(QUESTA_XPM_LIB) $(QUESTA_XPM_LIB); \
+		$(VLOG) -sv -work $(QUESTA_XPM_LIB) $(QUESTA_XPM_SRC); \
+	fi
+	@touch $@
+
+$(QUESTA_DIR)/compile.stamp: $(QUESTA_DIR)/sources.f $(SYN_FILES) $(TB_FILES) $(INC_FILES) $(QUESTA_DIR)/xpm.stamp
+	$(VLIB) $(QUESTA_WORK_LIB)
+	$(VMAP) $(QUESTA_WORK_LIB) $(QUESTA_WORK_LIB)
+	$(VLOG) -sv -work $(QUESTA_WORK_LIB) $(QUESTA_DEFS) -timescale 1ns/1ps $(QUESTA_INCS) -f $(QUESTA_DIR)/sources.f
+	@touch $@
+
+sim-questa: $(QUESTA_DIR)/compile.stamp
+	$(VSIM) -c $(QUESTA_LIBS) $(QUESTA_WORK_LIB).$(SIM_TOP) $(QUESTA_GLBL_TOP) -do "$(QUESTA_RUN); quit -f"
+
+sim-questa-gui: $(QUESTA_DIR)/compile.stamp
+	$(VSIM) $(QUESTA_LIBS) -voptargs="+acc" $(QUESTA_WORK_LIB).$(SIM_TOP) $(QUESTA_GLBL_TOP)
+
+questa-clean:
+	-rm -rf $(QUESTA_DIR) $(QUESTA_WORK_LIB) $(QUESTA_TRANSCRIPT) vsim.wlf *.wlf
+
+questa-xpm-clean: questa-clean
+	-rm -rf $(QUESTA_XPM_LIB)