export CODE_BASE_PATH = ${PWD}/../../E906_RTL_FACTORY
GCC_PREFIX = /opt/riscv/bin/riscv32-unknown-elf
GDB_PREFIX = /opt/riscv/bin/riscv32-unknown-elf-gdb

FILELIST = -F ../../smart_run/logical/filelists/soc.fl -F ./dpi/jtag.fl


ABI = -mabi=ilp32 -march=rv32imc

DEMODIR = ${PWD}
BUILD_DIR = ${DEMODIR}/build

TEST = sim


LINK = $(DEMODIR)/link.ld

# CFLAGS for verilator generated Makefiles. Without -std=c++11 it complains for `auto` variables
CFLAGS += "-std=c++11"
# Optimization for better performance; alternative is nothing for slower runtime (faster compiles)
# -O2 for faster runtime (slower compiles), or -O for balance.
VERILATOR_MAKE_FLAGS = OPT_FAST="-Os"

# Targets
all: clean verilator

clean:
	rm -rf build obj_dir

##################### Verilog Builds #####################################

verilator-build:
	verilator --cc -CFLAGS ${CFLAGS} \
	              -Wno-UNOPTFLAT \
	              -Wno-STMTDLY \
	              -Wno-MULTIDRIVEN \
	              -Wno-CASEINCOMPLETE \
	              -Wno-COMBDLY \
	              -Wno-LATCH \
	              -Wno-WIDTH \
	              -Wno-IMPLICIT \
	              ${FILELIST} \
								soc_sim.v \
								--trace \
	              --top-module soc_sim -exe test_soc_sim.cpp --autoflush
	cp ${DEMODIR}/test_soc_sim.cpp obj_dir
	$(MAKE) -j -C obj_dir/ -f Vsoc_sim.mk $(VERILATOR_MAKE_FLAGS)

##################### Simulation Runs #####################################

verilator: program.hex verilator-build
	cd build && ../obj_dir/Vsoc_sim 

##################### Test hex Build #####################################

program.hex: $(TEST).o $(LINK)
	@echo Building $(TEST)
	$(GCC_PREFIX)-gcc $(ABI) -Wl,-Map=$(BUILD_DIR)/$(TEST).map -lgcc -T$(LINK) -o $(BUILD_DIR)/$(TEST).bin $(BUILD_DIR)/$(TEST).o -nostartfiles  $(TEST_LIBS)
	$(GCC_PREFIX)-objcopy -O verilog $(BUILD_DIR)/$(TEST).bin $(BUILD_DIR)/program.hex
	$(GCC_PREFIX)-objdump -S  $(BUILD_DIR)/$(TEST).bin > $(BUILD_DIR)/$(TEST).dis
	@echo Completed building $(TEST)

%.o : %.s
	@mkdir -p build
	$(GCC_PREFIX)-cpp -g -I${BUILD_DIR}  $<  > $(BUILD_DIR)/$*.cpp.s
	$(GCC_PREFIX)-as -g $(ABI) $(BUILD_DIR)/$*.cpp.s -o $(BUILD_DIR)/$@

##################### openocd #####################################

openocd:
	openocd -f riscv.cfg

gdb:
	$(GDB_PREFIX) -x gdbinit ./build/$(TEST).bin

help:
	@echo Possible targets: verilator help clean all verilator-build program.hex

.PHONY: help clean verilator