# Add search path for linker scripts
LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ldscripts
LINKER_SCRIPT = qn908x.ld

# Internal FLASH memory is located at address 0x0100000, aliased to address
# 0x2100000 and can also be aliased to address 0, which is done by the
# pre_startup() function in cpu/qn908x/isr_qn908x.c. The address 0 can be also
# be remapped to RAM instead, and the FLASH can be turned completely off to save
# power, thus linking all the code based on address 0 could make it easier in
# the future to provide a low-power mode where portions of the code execute
# from RAM only during this low-power mode. However, linking all the code at
# address 0 makes it more difficult to attach gdb after a 'reset halt' but
# before the FLASH is mapped to 0 by pre_startup() since it can't place a
# breakpoint at any function in the FLASH alias at 0 until it is mapped.
# This default value of 0x01000000 makes it possible to place breakpoints across
# reboots, but it can be override from the board if needed. When setting
# ROM_START_ADDR to 0 the IMAGE_OFFSET must be set to 0x01000000 to allow
# flashing at the right location.
ROM_START_ADDR ?= 0x01000000
# SRAM is actually at 0x04000000 but it is also aliased to 0x20000000.
RAM_BASE_ADDR  = 0x20000000
RAM_START_ADDR = $(RAM_BASE_ADDR)

# The only QN908x chips available have 512K flash, although it seems possible to
# have 256K versions.
ROM_LEN ?= 512K
RAM_LEN ?= 128K

CFLAGS += \
  -DQN908X_ROM_START_ADDR=$(ROM_START_ADDR)
  #

# Vendor submodules are all bundled in the vendor module, and they include
# some files from the include/vendor directory directly so we need to add that
# include path here.
PSEUDOMODULES += vendor_%
INCLUDES += -I$(RIOTCPU)/$(CPU)/include/vendor

include $(RIOTMAKE)/arch/cortexm.inc.mk