REPO_DIR ?= $(abspath ../../..)
include $(REPO_DIR)/tools/project.mk

CC := $(CROSS)gcc
OBJCOPY := $(CROSS)objcopy
OBJDUMP := $(CROSS)objdump
SIZE := $(CROSS)size

BUILD_DIR ?= build
TARGET := bootrom_gps_mmio_double_read
BSP_DIR := ../bsp
MARCH ?= rv64imafdc_zicsr_zifencei
MABI ?= lp64d
BSP_DTIM_BASE ?= 0x80000000
BSP_DTIM_SIZE ?= 0x00100000

CFLAGS := -march=$(MARCH) -mabi=$(MABI) -mcmodel=medany -Os -ffreestanding -fno-builtin -fno-common -Wall -Wextra -I$(BSP_DIR)/include -DBSP_DTIM_BASE=$(BSP_DTIM_BASE)UL -DBSP_DTIM_SIZE=$(BSP_DTIM_SIZE)UL
LDFLAGS := -T ../bootloader/linker.ld -nostdlib -static -Wl,--gc-sections -Wl,--defsym=__dtim_base=$(BSP_DTIM_BASE) -Wl,--defsym=__dtim_size=$(BSP_DTIM_SIZE) -Wl,-Map,$(BUILD_DIR)/$(TARGET).map

OBJS := \
	$(BUILD_DIR)/bootloader_start.S.o \
	$(BUILD_DIR)/bsp_init.c.o \
	$(BUILD_DIR)/bsp_uart.c.o \
	$(BUILD_DIR)/main.c.o

.PHONY: all clean

all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).img $(BUILD_DIR)/$(TARGET).dump
	$(SIZE) $(BUILD_DIR)/$(TARGET).elf

$(BUILD_DIR):
	mkdir -p $@

$(BUILD_DIR)/bootloader_start.S.o: ../bootloader/start.S | $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(BUILD_DIR)/bsp_init.c.o: $(BSP_DIR)/drivers/init.c | $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(BUILD_DIR)/bsp_uart.c.o: $(BSP_DIR)/drivers/uart.c | $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(BUILD_DIR)/main.c.o: main.c | $(BUILD_DIR)
	$(CC) $(CFLAGS) -c $< -o $@

$(BUILD_DIR)/$(TARGET).elf: $(OBJS) ../bootloader/linker.ld
	$(CC) $(CFLAGS) $(OBJS) $(LDFLAGS) -lgcc -o $@

$(BUILD_DIR)/$(TARGET).img: $(BUILD_DIR)/$(TARGET).elf
	$(OBJCOPY) -O binary $< $@

$(BUILD_DIR)/$(TARGET).dump: $(BUILD_DIR)/$(TARGET).elf
	$(OBJDUMP) -d -S $< > $@

clean:
	rm -rf $(BUILD_DIR)