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116 lines
3.9 KiB
Makefile
116 lines
3.9 KiB
Makefile
# Bootloader binary blob
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MODULE := esp_bootloader
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# We are compiling the bootloader from the ESP8266_RTOS_SDK_DIR sources, so we
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# can't use the automatic module SRC discovery rules. Also, the compiled code
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# would not be linked into the application, instead it is linked into its own
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# binary file.
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NO_AUTO_SRC = 1
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include $(RIOTBASE)/Makefile.base
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include $(RIOTMAKE)/tools/esptool.inc.mk
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# List of bootloader sources.
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include $(CURDIR)/bootloader.inc.mk
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# Bootloader baudrate, set to the application defined one if any or the default
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# in serial.inc.mk
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BOOTLOADER_BAUD ?= $(BAUD)
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# Bootloader sdkconfig.h defined in CURDIR directory.
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INCLUDES = \
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-I$(dir $(RIOTBUILD_CONFIG_HEADER_C)) \
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-I$(ESP8266_RTOS_SDK_DIR)/components/bootloader_support/include \
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-I$(ESP8266_RTOS_SDK_DIR)/components/bootloader_support/include_priv \
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-I$(ESP8266_RTOS_SDK_DIR)/components/esp8266/include \
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-I$(ESP8266_RTOS_SDK_DIR)/components/heap/include \
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-I$(ESP8266_RTOS_SDK_DIR)/components/heap/port/esp8266/include \
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-I$(ESP8266_RTOS_SDK_DIR)/components/log/include/ \
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-I$(ESP8266_RTOS_SDK_DIR)/components/spi_flash/include \
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-I$(ESP8266_RTOS_SDK_DIR)/components/util/include \
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-I$(ESP8266_RTOS_SDK_DIR)/build-libs \
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-I$(CURDIR)
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#
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# BOOTLOADER_BUILD=1 signals to the SDK that's a bootloader build.
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CFLAGS = \
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-DBOOTLOADER_BUILD=1 \
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-DESP_PLATFORM \
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-DRIOT_BOOTLOADER_BAUD=$(BOOTLOADER_BAUD) \
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-DRIOT_FLASH_SIZE=$(FLASH_SIZE) \
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-O2 \
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-ffunction-sections \
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-fdata-sections \
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-fstrict-volatile-bitfields \
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-mlongcalls \
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#
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# Bootloader link flags. We use the SDK source and linking files instead of the
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# RIOT-OS ones to link the bootloader. Note that we also use the unmodified
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# SDK libraries.
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LINKFLAGS = \
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-nostdlib \
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-u call_user_start_cpu0 \
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-Wl,--gc-sections \
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-Wl,-static \
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-Wl,-EL \
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-Wl,--start-group \
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$(ESP_SDK_BOOTLOADER_OBJS) \
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-Wl,--end-group \
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-lgcc \
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-lstdc++ \
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-lgcov \
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-L$(ESP8266_RTOS_SDK_DIR)/components/esp8266/lib \
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-lcore \
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-T$(ESP8266_RTOS_SDK_DIR)/components/esp8266/ld/esp8266.rom.ld \
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-L$(ESP8266_RTOS_SDK_DIR)/components/bootloader/subproject/main \
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-Tesp8266.bootloader.ld \
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-Tesp8266.bootloader.rom.ld \
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# Build the bootloader on the application directory as it depends on the current
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# app settings from riotbuild.h.
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ESP_SDK_BOOTLOADER_DIR = $(BINDIR)/$(MODULE)
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ESP_SDK_BOOTLOADER_BIN = $(ESP_SDK_BOOTLOADER_DIR)/bootloader.bin
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ESP_SDK_BOOTLOADER_ELF = $(ESP_SDK_BOOTLOADER_DIR)/bootloader.elf
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ESP_SDK_BOOTLOADER_OBJS = \
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$(addprefix $(ESP_SDK_BOOTLOADER_DIR)/,$(ESP_SDK_BOOTLOADER_SRCS:%.c=%.o))
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DEPS := $(ESP_SDK_BOOTLOADER_OBJS:%.o=%.d)
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-include $(DEPS)
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# Main module dependency. We only build the bootloader.bin from this module.
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$(MODULE).module: $(ESP_SDK_BOOTLOADER_BIN)
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OBJ_DEPS += $(CURDIR)/sdkconfig.h
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$(ESP_SDK_BOOTLOADER_DIR)/%.o: $(ESP8266_RTOS_SDK_DIR)/%.c $(OBJ_DEPS)
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$(Q)mkdir -p $(dir $@)
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$(Q)$(CCACHE) $(CC) \
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$(CFLAGS) $(INCLUDES) -MQ '$@' -MD -MP -c -o $@ $(abspath $<)
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$(ESP_SDK_BOOTLOADER_DIR):
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mkdir -p $@
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$(ESP_SDK_BOOTLOADER_ELF): $(ESP_SDK_BOOTLOADER_OBJS) \
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| $(ESP_SDK_BOOTLOADER_DIR)
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$(Q)$(CC) -o $@ $(LINKFLAGS) -Wl,-Map=$(@:%.elf=%.map)
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FLASH_CHIP = esp8266
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# TODO: These should be exported/configurable from the app side. That would
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# require to export these values.
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FLASH_MODE ?= dout
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FLASH_FREQ ?= 40m
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FLASH_SIZE ?= 4
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# We use esptool to extract a version 1 app from the bootloader.elf. This is
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# like the regular objdump binary file but it contains a 16 byte header which
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# specifies the flash size, mode and speed that the ROM bootloader uses to load
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# this second-stage bootloader image.
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$(ESP_SDK_BOOTLOADER_BIN): esptool $(ESP_SDK_BOOTLOADER_ELF)
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$(Q)echo "Generating bootloader image $(ESP_SDK_BOOTLOADER_BIN)"
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$(Q)$(ESPTOOL) --chip $(FLASH_CHIP) elf2image --flash-mode $(FLASH_MODE) \
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--flash-size $(FLASH_SIZE)MB --flash-freq $(FLASH_FREQ) -o $@ $(ESP_SDK_BOOTLOADER_ELF)
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$(Q)mv $(@)0x00000.bin $@
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