## CPU Architecture selection via $ARCH

UPDATE_OBJS:=./src/update_flash.o

# check for FASTMATH or SP_MATH
ifeq ($(SPMATH),1)
  MATH_OBJS:=./lib/wolfssl/wolfcrypt/src/sp_int.o
else
  MATH_OBJS:=./lib/wolfssl/wolfcrypt/src/integer.o ./lib/wolfssl/wolfcrypt/src/tfm.o
endif

# Default flash offset
ARCH_FLASH_OFFSET=0x0

# Default SPI driver name
SPI_TARGET=$(TARGET)

# Default UART driver name
UART_TARGET=$(TARGET)

## Hash settings
ifeq ($(HASH),SHA256)
  CFLAGS+=-DWOLFBOOT_HASH_SHA256
endif

ifeq ($(HASH),SHA3)
  WOLFCRYPT_OBJS+=./lib/wolfssl/wolfcrypt/src/sha3.o
  CFLAGS+=-DWOLFBOOT_HASH_SHA3_384
  SIGN_OPTIONS+=--sha3
endif

# Include SHA256 module because it's implicitly needed by RSA
WOLFCRYPT_OBJS+=./lib/wolfssl/wolfcrypt/src/sha256.o

## ARM
ifeq ($(ARCH),AARCH64)
  CROSS_COMPILE:=aarch64-none-elf-
  CFLAGS+=-DARCH_AARCH64 -march=armv8-a
  OBJS+=src/boot_aarch64.o src/boot_aarch64_start.o
  CFLAGS+=-DNO_QNX
endif

ifeq ($(ARCH),ARM)
  CROSS_COMPILE:=arm-none-eabi-
  CFLAGS+=-mthumb -mlittle-endian -mthumb-interwork -DARCH_ARM
  LDFLAGS+=-mthumb -mlittle-endian -mthumb-interwork
  OBJS+=src/boot_arm.o

  ## Target specific configuration
  ifeq ($(TARGET),samr21)
    CORTEX_M0=1
  endif

  ifeq ($(TARGET),stm32l0)
    CORTEX_M0=1
  endif

  ifeq ($(TARGET),stm32g0)
    CORTEX_M0=1
  endif

  ifeq ($(TARGET),stm32f7)
    ARCH_FLASH_OFFSET=0x08000000
    SPI_TARGET=stm32
  endif

  ifeq ($(TARGET),stm32h7)
    ARCH_FLASH_OFFSET=0x08000000
    SPI_TARGET=stm32
  endif

  ifeq ($(TARGET),stm32wb)
    ARCH_FLASH_OFFSET=0x08000000
    SPI_TARGET=stm32
  endif

  ## Cortex-M CPU
  ifeq ($(CORTEX_M0),1)
    CFLAGS+=-mcpu=cortex-m0
    LDFLAGS+=-mcpu=cortex-m0
    ifeq ($(SPMATH),1)
      MATH_OBJS += ./lib/wolfssl/wolfcrypt/src/sp_c32.o
    endif
  else
    ifeq ($(NO_ASM),1)
      ifeq ($(SPMATH),1)
        MATH_OBJS += ./lib/wolfssl/wolfcrypt/src/sp_c32.o
      endif
      CFLAGS+=-mcpu=cortex-m3
      LDFLAGS+=-mcpu=cortex-m3
    else
      CFLAGS+=-mcpu=cortex-m3 -fomit-frame-pointer
      LDFLAGS+=-mcpu=cortex-m3
      ifeq ($(SPMATH),1)
        CFLAGS+=-DWOLFSSL_SP_ASM -DWOLFSSL_SP_ARM_CORTEX_M_ASM
        MATH_OBJS += ./lib/wolfssl/wolfcrypt/src/sp_cortexm.o
      endif
    endif
  endif
endif

## RISCV
ifeq ($(ARCH),RISCV)
  CROSS_COMPILE:=riscv32-unknown-elf-
  CFLAGS+=-fno-builtin-printf -DUSE_M_TIME -g -march=rv32imac -mabi=ilp32 -mcmodel=medany -nostartfiles -DARCH_RISCV
  LDFLAGS+=-march=rv32imac -mabi=ilp32 -mcmodel=medany
  MATH_OBJS += ./lib/wolfssl/wolfcrypt/src/sp_c32.o

  # Prune unused functions and data
  CFLAGS +=-ffunction-sections -fdata-sections
  LDFLAGS+=-Wl,--gc-sections

  OBJS+=src/boot_riscv.o src/vector_riscv.o
  ARCH_FLASH_OFFSET=0x20010000
endif


ifeq ($(TARGET),kinetis)
  CFLAGS+= -I$(MCUXPRESSO_DRIVERS)/drivers -I$(MCUXPRESSO_DRIVERS) -DCPU_$(MCUXPRESSO_CPU) -I$(MCUXPRESSO_CMSIS)/Include -DDEBUG_CONSOLE_ASSERT_DISABLE=1
  OBJS+= $(MCUXPRESSO_DRIVERS)/drivers/fsl_clock.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_ftfx_flash.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_ftfx_cache.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_ftfx_controller.o
  ## The following lines can be used to enable HW acceleration
  ifeq ($(MCUXPRESSO_CPU),MK82FN256VLL15)
    ifeq ($(PKA),1)
      PKA_EXTRA_CFLAGS+=-DFREESCALE_LTC_ECC -DFREESCALE_USE_LTC -DFREESCALE_LTC_TFM
      PKA_EXTRA_OBJS+=./lib/wolfssl/wolfcrypt/src/port/nxp/ksdk_port.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_ltc.o
    endif
  endif
endif

ifeq ($(TARGET),lpc)
  CFLAGS+=-I$(MCUXPRESSO_DRIVERS)/drivers -I$(MCUXPRESSO_DRIVERS) -DCPU_$(MCUXPRESSO_CPU) -I$(MCUXPRESSO_CMSIS)/Include -DDEBUG_CONSOLE_ASSERT_DISABLE=1
  OBJS+=$(MCUXPRESSO_DRIVERS)/drivers/fsl_clock.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_flashiap.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_power.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_reset.o
  OBJS+=$(MCUXPRESSO_DRIVERS)/mcuxpresso/libpower_softabi.a $(MCUXPRESSO_DRIVERS)/drivers/fsl_common.o
  OBJS+=$(MCUXPRESSO_DRIVERS)/drivers/fsl_usart.o $(MCUXPRESSO_DRIVERS)/drivers/fsl_flexcomm.o
endif

ifeq ($(TARGET),stm32f4)
  SPI_TARGET=stm32
endif

ifeq ($(TARGET),stm32wb)
  SPI_TARGET=stm32
  ifneq ($(PKA),0)
    PKA_EXTRA_OBJS+= $(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Src/stm32wbxx_hal_pka.o  ./lib/wolfssl/wolfcrypt/src/port/st/stm32.o
    PKA_EXTRA_CFLAGS+=-DWOLFSSL_STM32_PKA -I$(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Inc \
        -Isrc -I$(STM32CUBE)/Drivers/BSP/P-NUCLEO-WB55.Nucleo/ -I$(STM32CUBE)/Drivers/CMSIS/Device/ST/STM32WBxx/Include \
        -I$(STM32CUBE)/Drivers/STM32WBxx_HAL_Driver/Inc/ \
        -I$(STM32CUBE)/Drivers/CMSIS/Include \
		-Ihal \
	    -DSTM32WB55xx
  endif
endif

ifeq ($(TARGET),psoc6)
    CORTEX_M0=1
    OBJS+= $(CYPRESS_PDL)/drivers/source/cy_flash.o \
					 $(CYPRESS_PDL)/drivers/source/cy_ipc_pipe.o \
					 $(CYPRESS_PDL)/drivers/source/cy_ipc_sema.o \
					 $(CYPRESS_PDL)/drivers/source/cy_ipc_drv.o \
					 $(CYPRESS_PDL)/drivers/source/cy_device.o \
					 $(CYPRESS_PDL)/drivers/source/cy_sysclk.o \
					 $(CYPRESS_PDL)/drivers/source/cy_sysint.o \
					 $(CYPRESS_PDL)/drivers/source/cy_syslib.o \
					 $(CYPRESS_PDL)/drivers/source/cy_ble_clk.o \
					 $(CYPRESS_PDL)/drivers/source/cy_wdt.o \
					 $(CYPRESS_PDL)/drivers/source/TOOLCHAIN_GCC_ARM/cy_syslib_gcc.o \
					 $(CYPRESS_PDL)/devices/templates/COMPONENT_MTB/COMPONENT_CM0P/system_psoc6_cm0plus.o

    PSOC6_CRYPTO_OBJS=./lib/wolfssl/wolfcrypt/src/port/cypress/psoc6_crypto.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_vu.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_ecc_domain_params.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_ecc_nist_p.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_ecc_ecdsa.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_sha_v2.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_sha_v1.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_mem_v2.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_mem_v1.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_hw.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto_core_hw_v1.o \
					 $(CYPRESS_PDL)/drivers/source/cy_crypto.o

    CFLAGS+=-I$(CYPRESS_PDL)/drivers/include/ \
		-I$(CYPRESS_PDL)/devices/include \
		-I$(CYPRESS_PDL)/cmsis/include \
		-I$(CYPRESS_TARGET_LIB) \
		-I$(CYPRESS_CORE_LIB)/include \
		-I$(CYPRESS_PDL)/devices/include/ip \
		-I$(CYPRESS_PDL)/devices/templates/COMPONENT_MTB \
		-DCY8C624ABZI_D44

    ARCH_FLASH_OFFSET=0x10000000
    ifneq ($(PSOC6_CRYPTO),0)
        CFLAGS+=-DWOLFSSL_PSOC6_CRYPTO
        OBJS+=$(PSOC6_CRYPTO_OBJS)
    endif
endif



CFLAGS+=-DARCH_FLASH_OFFSET=$(ARCH_FLASH_OFFSET)

## Toolchain setup
CC=$(CROSS_COMPILE)gcc
LD=$(CROSS_COMPILE)gcc
AS=$(CROSS_COMPILE)gcc
OBJCOPY:=$(CROSS_COMPILE)objcopy
SIZE:=$(CROSS_COMPILE)size
BOOT_IMG?=test-app/image.bin



## Update mechanism
ifeq ($(ARCH),AARCH64)
  CFLAGS+=-DMMU
  UPDATE_OBJS:=src/update_ram.o
endif
ifeq ($(DUALBANK_SWAP),1)
  UPDATE_OBJS:=src/update_flash_hwswap.o
endif