# File to be included in all makefiles

PROJ_NAME = freeRTOS_demo
RISCV_XLEN ?= 32
RISCV_LIB  ?= elf
ARCH ?= rv32i_zicsr
OPT ?= O0 

PRINT_ENABLE ?= yes

TARGET=riscv32-unknown-${RISCV_LIB}
GCC_PACK ?= yes
RISCV_NAME ?= riscv32-unknown-elf

ifeq ($(GCC_PACK),yes)
	RISCV_PATH ?= /home/user/riscv/opt/rv32im/
endif

MABI = ilp32
MARCH := rv32i_zicsr

WARNINGS= -Wall -Wextra -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wsign-compare \
		-Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wunused

FREERTOS_SOURCE_DIR	= ../../Source
CUNIT	= ../../../cunit

INCLUDES = \
	-I. \
	-I../arch \
	-I.. \
	-I./conf \
	-I./include \
	-I$(FREERTOS_SOURCE_DIR)/include \
	-I../Common/include \
	-I$(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV

CFLAGS = \
	$(WARNINGS) $(INCLUDES) \
	-fomit-frame-pointer -fno-strict-aliasing -fno-builtin \
	-D__gracefulExit -mcmodel=medany \
    	-march=$(ARCH)  -mabi=$(MABI) -ggdb3 -${OPT} 

CXXFLAGS += -march=$(ARCH) \
            -mabi=$(MABI) \
            -DNDEBUG \
            -fno-pic \
            -MD \
            -fstrict-volatile-bitfields \
            -fno-strict-aliasing \
            -std=c++11 \
	    -ggdb3 -gdwarf-3 \
            $(INCLUDES)

ifeq ($(PRINT_ENABLE),yes)
	CFLAGS += -DPRINT_ENABLE
	CXXFLAGS += -DPRINT_ENABLE
endif

LDFLAGS	 = -g -T ../arch/link.ld -nostartfiles -static -march=$(ARCH) 
LIBS	 = -L$(RISCV_PATH)/lib/gcc/$(TARGET)/$(GCCVER) \
		   -L$(RISCV_PATH)/$(TARGET)/lib \
		   -lc -lgcc -lstdc++\
		   -I/home/user/opt/include

RISCV_OBJCOPY = $(RISCV_PATH)/bin/$(RISCV_NAME)-objcopy
RISCV_OBJDUMP = $(RISCV_PATH)/bin/$(RISCV_NAME)-objdump
RISCV_CC = $(RISCV_PATH)/bin/$(RISCV_NAME)-gcc
CXX = $(RISCV_PATH)/bin/$(RISCV_NAME)-g++

SRCS = $(wildcard ../arch/*.c) \
       $(wildcard ../arch/*.cpp) \
       $(wildcard ../arch/*.S) \
       $(wildcard ../Common/*.c) \
       $(wildcard ../Common/*.cpp) \
       $(wildcard ../Common/*.S) \
       $(FREERTOS_SOURCE_DIR)/croutine.c \
	   $(FREERTOS_SOURCE_DIR)/list.c \
	   $(FREERTOS_SOURCE_DIR)/queue.c \
	   $(FREERTOS_SOURCE_DIR)/tasks.c \
	   $(FREERTOS_SOURCE_DIR)/timers.c \
	   $(FREERTOS_SOURCE_DIR)/event_groups.c \
	   $(FREERTOS_SOURCE_DIR)/portable/MemMang/heap_2.c \
	   $(FREERTOS_SOURCE_DIR)/string.c \
	   $(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV/port.c \
	   $(FREERTOS_SOURCE_DIR)/portable/GCC/RISCV/portasm.S \
	   ../arch/boot.S

OBJDIR = bin
OBJS := $(SRCS)
OBJS := $(OBJS:../arch/%.c=bin/arch/%.o)
OBJS := $(OBJS:../arch/%.cpp=bin/arch/%.o)
OBJS := $(OBJS:../arch/%.S=bin/arch/%.o)
OBJS := $(OBJS:../Common/%.c=bin/Common/%.o)
OBJS := $(OBJS:../Common/%.cpp=bin/Common/%.o)
OBJS := $(OBJS:../Common/%.S=bin/Common/%.o)
OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.c=bin/freertos/%.o)
OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.cpp=bin/freertos/%.o)
OBJS := $(OBJS:$(FREERTOS_SOURCE_DIR)/%.S=bin/freertos/%.o)

all: $(OBJDIR)/$(PROJ_NAME).elf $(OBJDIR)/$(PROJ_NAME).hex $(OBJDIR)/$(PROJ_NAME).asm

$(OBJDIR)/%.elf: $(OBJS) | $(OBJDIR)
	$(CXX) $(CXXFLAGS) -o $@ $^ $(LDFLAGS) $(LIBS)

$(OBJDIR)/%.hex: $(OBJDIR)/%.elf
	$(RISCV_OBJCOPY) -O ihex $^ $@

$(OBJDIR)/%.bin: $(OBJDIR)/%.elf
	$(RISCV_OBJCOPY) -O binary $^ $@

$(OBJDIR)/%.v: $(OBJDIR)/%.elf
	$(RISCV_OBJCOPY) -O verilog $^ $@

$(OBJDIR)/%.asm: $(OBJDIR)/%.elf
	$(RISCV_OBJDUMP) -S -d $^ > $@

$(OBJDIR)/arch/%.o: ../arch/%.c
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^

$(OBJDIR)/arch/%.o: ../arch/%.cpp
	mkdir -p $(dir $@)
	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^

$(OBJDIR)/arch/%.o: ../arch/%.S
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1

$(OBJDIR)/Common/%.o: ../Common/%.c
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^

$(OBJDIR)/Common/%.o: ../Common/%.cpp
	mkdir -p $(dir $@)
	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^

$(OBJDIR)/Common/%.o: ../Common/%.S
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1

$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.c
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) $(INC) -o $@ $^

$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.cpp
	mkdir -p $(dir $@)
	$(CXX) -c $(CXXFLAGS) $(INC) -o $@ $^

$(OBJDIR)/freertos/%.o: $(FREERTOS_SOURCE_DIR)/%.S
	mkdir -p $(dir $@)
	$(RISCV_CC) -c $(CFLAGS) -o $@ $^ -D__ASSEMBLY__=1

$(OBJDIR):
	mkdir -p $@

.PHONY: clean
clean:
	rm -rf $(OBJDIR)/*

clean-all: clean

.SECONDARY: $(OBJS)