TOP_DIR       := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
TOOLCHAIN_DIR ?= $(TOP_DIR)vendor/libopencm3

ifneq ($(V),1)
Q := @
endif

PYTHON ?= python
CC_FOR_BUILD ?= gcc

ifeq ($(EMULATOR),1)
CC       ?= gcc
LD       := $(CC)
OBJCOPY  := true
OBJDUMP  := true
AR       := ar
AS       := as

CONFFLAG ?= -DCONFIDENTIAL=''
OPTFLAGS ?= -O3
DBGFLAGS ?= -g3 -ggdb3
CPUFLAGS ?=
FPUFLAGS ?=
else
PREFIX   ?= arm-none-eabi-
CC       := $(PREFIX)gcc
LD       := $(PREFIX)gcc
OBJCOPY  := $(PREFIX)objcopy
OBJDUMP  := $(PREFIX)objdump
AR       := $(PREFIX)ar
AS       := $(PREFIX)as
OPENOCD  := openocd -f interface/stlink.cfg -c "transport select hla_swd" -f target/stm32f2x.cfg

GDB      := $(PREFIX)gdb --nx -ex 'set remotetimeout unlimited' -ex 'set confirm off' -ex 'target remote 127.0.0.1:3333' -ex 'monitor reset halt'

CONFFLAG ?= -DCONFIDENTIAL='__attribute__((section("confidential")))' -fstack-protector-all
OPTFLAGS ?= -O3
DBGFLAGS ?= -g -DNDEBUG
CPUFLAGS ?= -mcpu=cortex-m3 -mthumb
FPUFLAGS ?= -msoft-float
endif

CFLAGS   += $(OPTFLAGS) \
            $(DBGFLAGS) \
            -std=gnu11 \
            -W \
            -Wall \
            -Wextra \
            -Wimplicit-function-declaration \
            -Wredundant-decls \
            -Wstrict-prototypes \
            -Wundef \
            -Wshadow \
            -Wpointer-arith \
            -Wformat \
            -Wreturn-type \
            -Wsign-compare \
            -Wmultichar \
            -Wformat-nonliteral \
            -Winit-self \
            -Wuninitialized \
            -Wformat-security \
            -Wno-missing-braces \
            -Werror \
            -fno-common \
            -fno-exceptions \
            -fvisibility=internal \
            -ffunction-sections \
            -fdata-sections \
            $(CPUFLAGS) \
            $(FPUFLAGS) \
            $(CONFFLAG) \
            -DSTM32F2 \
            -DRAND_PLATFORM_INDEPENDENT=1 \
            -I$(TOOLCHAIN_DIR)/include \
            -I$(TOP_DIR) \
            -I$(TOP_DIR)gen \
            -I$(TOP_DIR)vendor/trezor-crypto \
            -I$(TOP_DIR)vendor/QR-Code-generator/c \
            -I$(TOP_DIR)vendor/trezor-storage

LDFLAGS  += -L$(TOP_DIR) \
            $(DBGFLAGS) \
            $(CPUFLAGS) \
            $(FPUFLAGS)

ZKP_PATH = $(TOP_DIR)vendor/secp256k1-zkp

ifeq ($(EMULATOR),1)
CFLAGS   += -DEMULATOR=1

CFLAGS   += -include $(TOP_DIR)emulator/emulator.h
CFLAGS   += -include stdio.h

LDFLAGS  += -L$(TOP_DIR)emulator

LDLIBS   += -ltrezor -lemulator
LIBDEPS  += $(TOP_DIR)/libtrezor.a $(TOP_DIR)emulator/libemulator.a

CFLAGS   += $(shell pkg-config --cflags sdl2 SDL2_image)
LDLIBS   += $(shell pkg-config --libs sdl2 SDL2_image)

ifdef RANDOM_DEV_FILE
CFLAGS += -DRANDOM_DEV_FILE=\"$(RANDOM_DEV_FILE)\"
endif

else
ifdef APPVER
CFLAGS   += -DAPPVER=$(APPVER)
LDSCRIPT  = $(TOP_DIR)/memory_app_$(APPVER).ld
else
LDSCRIPT  = $(TOP_DIR)/memory.ld
endif

CFLAGS   += -DEMULATOR=0

LDFLAGS  += --static \
            -Wl,--start-group \
            -lc \
            -lgcc \
            -lnosys \
            -Wl,--end-group \
            -L$(TOOLCHAIN_DIR)/lib \
            -T$(LDSCRIPT) \
            -nostartfiles \
            -Wl,--gc-sections

LDLIBS   += -ltrezor
LIBDEPS  += $(TOP_DIR)/libtrezor.a

LDLIBS   += -lopencm3_stm32f2
LIBDEPS  += $(TOOLCHAIN_DIR)/lib/libopencm3_stm32f2.a
endif

ifeq ($(BITCOIN_ONLY), 1)
CFLAGS += -DBITCOIN_ONLY=1
CFLAGS += -DU2F_ENABLED=0
else
CFLAGS += -DBITCOIN_ONLY=0
CFLAGS += -DU2F_ENABLED=1
endif

ifeq ($(PRODUCTION), 0)
CFLAGS   += -DPRODUCTION=0
CPUFLAGS += -DPRODUCTION=0
$(info PRODUCTION=0)
else
CFLAGS   += -DPRODUCTION=1
CPUFLAGS += -DPRODUCTION=1
$(info PRODUCTION=1)
endif

ifeq ($(DEBUG_RNG), 1)
CFLAGS += -DDEBUG_RNG=1
else
CFLAGS += -DDEBUG_RNG=0
endif

all: $(NAME).bin

openocd:
	$(OPENOCD)

gdb_bootloader: bootloader/bootloader.elf
	$(GDB) $<

gdb_firmware: firmware/trezor.elf
	$(GDB) $<

flash: $(NAME).bin
	$(OPENOCD) -c "init; reset halt; flash write_image erase $(NAME).bin 0x8000000; exit"

upload: sign
	trezorctl firmware_update -f $(NAME).bin -s

sign: $(NAME).bin
	$(PYTHON) ../bootloader/firmware_sign.py -f $(NAME).bin

release: $(NAME).bin
	$(PYTHON) ../bootloader/firmware_sign.py -f $(NAME).bin
	cp $(NAME).bin $(NAME)-$(APPVER).bin
	chmod -x $(NAME)-$(APPVER).bin
	xxd -p $(NAME)-$(APPVER).bin | tr -d '\n' > $(NAME)-$(APPVER).bin.hex

$(NAME).bin: $(NAME).elf
	@printf "  OBJCOPY $@\n"
	$(Q)$(OBJCOPY) -Obinary $(NAME).elf $(NAME).bin

$(NAME).hex: $(NAME).elf
	@printf "  OBJCOPY $@\n"
	$(Q)$(OBJCOPY) -Oihex $(NAME).elf $(NAME).hex

$(NAME).srec: $(NAME).elf
	@printf "  OBJCOPY $@\n"
	$(Q)$(OBJCOPY) -Osrec $(NAME).elf $(NAME).srec

$(NAME).list: $(NAME).elf
	@printf "  OBJDUMP $@\n"
	$(Q)$(OBJDUMP) -S $(NAME).elf > $(NAME).list

$(NAME).elf: $(OBJS) $(LDSCRIPT) $(LIBDEPS)
	@printf "  LD      $@\n"
	$(Q)$(LD) -o $(NAME).elf $(OBJS) $(LDLIBS) $(LDFLAGS)

$(ZKP_PATH)/src/ecmult_static_context.h: $(ZKP_PATH)/src/gen_context.c
	@printf "  GEN     $@\n"
	$(Q)$(CC_FOR_BUILD) $(ZKP_CFLAGS) $(ZKP_PATH)/src/gen_context.c -o $(ZKP_PATH)/gen_context
	$(Q)cd $(ZKP_PATH) && ./gen_context

secp256k1-zkp.o: $(ZKP_PATH)/src/ecmult_static_context.h
	@printf "  CC      $@\n"
	$(Q)$(CC) $(CFLAGS) -Wno-unused-function $(ZKP_CFLAGS) -I$(ZKP_PATH) -I$(ZKP_PATH)/src -c $(ZKP_PATH)/src/secp256k1.c -o secp256k1-zkp.o

field_10x26_arm.o:
	@printf "  AS      $@\n"
	$(Q)$(CC) $(CFLAGS) $(ZKP_CFLAGS) -c $(ZKP_PATH)/src/asm/field_10x26_arm.s -o field_10x26_arm.o

%.o: %.S Makefile
	@printf "  AS      $@\n"
	$(Q)$(CC) $(CPUFLAGS) -o $@ -c $<

%.o: %.c Makefile
	@printf "  CC      $@\n"
	$(Q)$(CC) $(CFLAGS) -MMD -MP -o $@ -c $<

%.small.o: %.c Makefile
	@printf "  CC      $@\n"
	$(Q)$(CC) $(CFLAGS) -MMD -MP -o $@ -c $<

%.d: %.c Makefile
	@printf "  DEP     $@\n"
	$(Q)$(CC) $(CFLAGS) -MM -MP -MG -o $@ $<

%.small.d: %.c Makefile
	@printf "  DEP     $@\n"
	$(Q)$(CC) $(CFLAGS) -MM -MP -MG -o $@ $<

clean::
	rm -f $(OBJS)
	rm -f *.a
	rm -f *.bin
	rm -f *.d
	rm -f *.elf
	rm -f *.hex
	rm -f *.list
	rm -f *.log
	rm -f *.srec

-include $(OBJS:.o=.d)