# include module specific includes
INCLUDES += -I$(RIOTCPU)/cortexm_common/include
INCLUDES += -I$(RIOTCPU)/cortexm_common/include/vendor

# All variables must be defined in the CPU configuration when using the common
# `ldscripts/cortexm.ld`
ifneq (,$(ROM_START_ADDR)$(RAM_START_ADDR)$(ROM_LEN)$(RAM_LEN))
  $(if $(ROM_START_ADDR),,$(error ROM_START_ADDR is not defined))
  $(if $(RAM_START_ADDR),,$(error RAM_START_ADDR is not defined))
  $(if $(ROM_LEN),,$(error ROM_LEN is not defined))
  $(if $(RAM_LEN),,$(error RAM_LEN is not defined))
  LINKFLAGS += $(LINKFLAGPREFIX)--defsym=_rom_start_addr=$(ROM_START_ADDR)
  LINKFLAGS += $(LINKFLAGPREFIX)--defsym=_ram_start_addr=$(RAM_START_ADDR)
  LINKFLAGS += $(LINKFLAGPREFIX)--defsym=_rom_length=$(ROM_LEN)
  LINKFLAGS += $(LINKFLAGPREFIX)--defsym=_ram_length=$(RAM_LEN)
endif

TOOLCHAINS_SUPPORTED = gnu llvm

# Only define the linker symbol if the variable is set
# The variable can be set using target specific variable thanks to lazy evaluation

# ROM_OFFSET: offset in rom to start linking, allows supporting a bootloader
LINKFLAGS += $(if $(ROM_OFFSET),$(LINKFLAGPREFIX)--defsym=_rom_offset=$(ROM_OFFSET))
# FW_ROM_LEN: rom length to use for firmware linking. Allows linking only in a section of the rom.
LINKFLAGS += $(if $(FW_ROM_LEN),$(LINKFLAGPREFIX)--defsym=_fw_rom_length=$(FW_ROM_LEN))


# Configure riotboot bootloader and slot lengths
# 4KB are currently enough
RIOTBOOT_LEN ?= 0x1000
# Currently 2 slots are supported by default, equals in length
NUM_SLOTS ?= 2
# Take the whole flash minus RIOTBOOT_LEN and divide it by NUM_SLOTS
SLOT0_LEN ?= $(shell printf "0x%x" $$((($(ROM_LEN:%K=%*1024)-$(RIOTBOOT_LEN)) / $(NUM_SLOTS))))
SLOT1_LEN ?= $(SLOT0_LEN)
SLOT0_LEN := $(SLOT0_LEN)
SLOT1_LEN := $(SLOT1_LEN)