Add support for test programs

hw/efinix_fpga/simulation/Makefile

@@ -4,6 +4,8 @@ SRCS+=$(shell find ../src/ -type f -name "*.*v")
 
 INC=$(shell find include/ -type f)
 
+TEST_PROGRAM=../../../sw/test_code/simple_mem_test/simple_mem_test.hex
+
 #TODO implement something like sources.list
 
 TOP_MODULE=sim_top
@@ -15,7 +17,7 @@ all: $(INIT_MEM)
 	iverilog -g2005-sv $(FLAGS) -s $(TOP_MODULE) -o $(TARGET) $(INC) $(SRCS)
 
 $(INIT_MEM):
-	cp ../$(INIT_MEM) .
+	cp $(TEST_PROGRAM) ./init_hex.mem
 
 .PHONY: clean
 clean: