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# The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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# The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
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#################################################################################################
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#################################################################################################
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# *****************************************************************************
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# *****************************************************************************
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# USER CONFIGURATION
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# USER CONFIGURATION (use default if not set by user)
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# *****************************************************************************
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# *****************************************************************************
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# Compiler effort
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# Compiler effort
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EFFORT = -Os
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EFFORT ?= -Os
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# User's application sources (add additional files here)
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# User's application sources (add additional files here)
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APP_SRC = $(wildcard *.c)
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APP_SRC ?= $(wildcard *.c)
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# User's application include folders (don't forget the '-I' before each entry)
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# User's application include folders (don't forget the '-I' before each entry)
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APP_INC = -I .
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APP_INC ?= -I .
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# Compiler toolchain (use default if not set by user)
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# Compiler toolchain
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RISCV_TOOLCHAIN ?= riscv32-unknown-elf
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RISCV_TOOLCHAIN ?= riscv32-unknown-elf
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# CPU architecture and ABI
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# CPU architecture and ABI
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MARCH = -march=rv32i
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MARCH ?= -march=rv32i
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MABI = -mabi=ilp32
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MABI ?= -mabi=ilp32
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# Path to runtime c library (use default if not set by user)
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# Relative or absolute path to the NEORV32 home folder
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LIBC_PATH ?= $(dir $(shell which $(CC)))../$(RISCV_TOOLCHAIN)/lib/libc.a
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LIBGCC_PATH ?= $(dir $(shell which $(CC)))../lib/gcc/$(RISCV_TOOLCHAIN)/*/libgcc.a
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# Relative or absolute path to the NEORV32 home folder (use default if not set by user)
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NEORV32_HOME ?= ../../..
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NEORV32_HOME ?= ../../..
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# *****************************************************************************
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# *****************************************************************************
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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# Tools and flags
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# Tools and flags
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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# compiler tools
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# compiler tools
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CC = $(RISCV_TOOLCHAIN)-gcc
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CC = $(RISCV_TOOLCHAIN)-gcc
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LD = $(RISCV_TOOLCHAIN)-ld
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OBJDUMP = $(RISCV_TOOLCHAIN)-objdump
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OBJDUMP = $(RISCV_TOOLCHAIN)-objdump
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OBJCOPY = $(RISCV_TOOLCHAIN)-objcopy
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OBJCOPY = $(RISCV_TOOLCHAIN)-objcopy
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SIZE = $(RISCV_TOOLCHAIN)-size
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SIZE = $(RISCV_TOOLCHAIN)-size
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# NEORV32 executable image generator
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# NEORV32 executable image generator
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IMAGE_GEN = $(NEORV32_EXG_PATH)/image_gen
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IMAGE_GEN = $(NEORV32_EXG_PATH)/image_gen
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# Compiler flags
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# Compiler & linker flags
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CC_OPTS = $(MARCH) $(MABI) $(EFFORT) -Wall -ffunction-sections -fdata-sections -lm
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CC_OPTS = $(MARCH) $(MABI) $(EFFORT) -Wall -ffunction-sections -fdata-sections -nostartfiles
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CC_OPTS += -Wl,--gc-sections -lm -lc -lgcc -lc
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# Linker flags
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LD_OPTS = $(EFFORT) --gc-sections
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# User flags for additional config
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# User flags for additional configuration
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USER_FLAGS =
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USER_FLAGS =
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CC_OPTS += $(USER_FLAGS)
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CC_OPTS += $(USER_FLAGS)
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# Use embedded RISC-V CPU extension?
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ifeq (,$(findstring rv32e,$(MARCH)))
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CC_OPTS +=
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else
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CC_OPTS += -D__RISCV_EMBEDDED_CPU__
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endif
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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# Host native compiler
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# Host native compiler
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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CC_X86 = gcc -Wall -O -g
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CC_X86 = gcc -Wall -O -g
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$(OBJ): %.o : %.c crt0.elf
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$(OBJ): %.o : %.c crt0.elf
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@$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) $< -o $@
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@$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) $< -o $@
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# Link object files and show memory utilization
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# Link object files and show memory utilization
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main.elf: $(OBJ)
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main.elf: $(OBJ)
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@$(LD) $(LD_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) -T $(NEORV32_COM_PATH)/neorv32.ld $(OBJ) $(LIBC_PATH) $(LIBGCC_PATH) -o $@
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@$(CC) $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) -T $(NEORV32_COM_PATH)/neorv32.ld $(OBJ) -o $@
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@echo "Memory utilization:"
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@echo "Memory utilization:"
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@$(SIZE) main.elf
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@$(SIZE) main.elf
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# Assembly listing file (for debugging)
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# Assembly listing file (for debugging)
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$(APP_ASM): main.elf
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$(APP_ASM): main.elf
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@$(CC) $(CC_OPTS) -c $< -o $@
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@$(CC) $(CC_OPTS) -c $< -o $@
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# Compile and install bootloader
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# Compile and install bootloader
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bootloader: bootloader_crt0.elf $(OBJ) $(IMAGE_GEN)
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bootloader: bootloader_crt0.elf $(OBJ) $(IMAGE_GEN)
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@set -e
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@set -e
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@$(LD) $(LD_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) -T $(NEORV32_COM_PATH)/bootloader_neorv32.ld $(OBJ) $(LIBC_PATH) $(LIBGCC_PATH) -o bootloader.elf
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@$(CC) $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) -T $(NEORV32_COM_PATH)/bootloader_neorv32.ld $(OBJ) -o bootloader.elf
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@echo "Memory utilization:"
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@echo "Memory utilization:"
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@$(SIZE) bootloader.elf
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@$(SIZE) bootloader.elf
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@$(OBJDUMP) -D -S -z bootloader.elf > bootloader.s
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@$(OBJDUMP) -D -S -z bootloader.elf > bootloader.s
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@$(OBJCOPY) -I elf32-little bootloader.elf -j .text -O binary text.bin
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@$(OBJCOPY) -I elf32-little bootloader.elf -j .text -O binary text.bin
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@$(OBJCOPY) -I elf32-little bootloader.elf -j .rodata -O binary rodata.bin
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@$(OBJCOPY) -I elf32-little bootloader.elf -j .rodata -O binary rodata.bin
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$(error NEORV32_HOME folder not found!)
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$(error NEORV32_HOME folder not found!)
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endif
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endif
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@echo "NEORV32_HOME: $(NEORV32_HOME)"
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@echo "NEORV32_HOME: $(NEORV32_HOME)"
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@echo "---------------- Check: $(CC) ----------------"
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@echo "---------------- Check: $(CC) ----------------"
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@$(CC) -v
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@$(CC) -v
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@echo "---------------- Check: $(LD) ----------------"
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@$(LD) -V
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@echo "---------------- Check: $(OBJDUMP) ----------------"
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@echo "---------------- Check: $(OBJDUMP) ----------------"
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@$(OBJDUMP) -V
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@$(OBJDUMP) -V
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@echo "---------------- Check: $(OBJCOPY) ----------------"
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@echo "---------------- Check: $(OBJCOPY) ----------------"
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@$(OBJCOPY) -V
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@$(OBJCOPY) -V
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@echo "---------------- Check: $(SIZE) ----------------"
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@echo "---------------- Check: $(SIZE) ----------------"
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@$(SIZE) -V
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@$(SIZE) -V
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@echo "---------------- Check: NEORV32 image_gen ----------------"
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@echo "---------------- Check: NEORV32 image_gen ----------------"
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@$(IMAGE_GEN) -help
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@$(IMAGE_GEN) -help
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@echo "---------------- Check: native gcc ----------------"
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@echo "---------------- Check: Native GCC ----------------"
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@$(CC_X86) -v
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@$(CC_X86) -v
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@echo
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@echo
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@echo "Toolchain check OK"
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@echo "Toolchain check OK"
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@echo "MARCH: $(MARCH)"
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@echo "MARCH: $(MARCH)"
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@echo "MABI: $(MABI)"
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@echo "MABI: $(MABI)"
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@echo "---------------- Info: RISC-V Toolchain ----------------"
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@echo "---------------- Info: RISC-V Toolchain ----------------"
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@echo "Toolchain: $(RISCV_TOLLCHAIN)"
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@echo "Toolchain: $(RISCV_TOLLCHAIN)"
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@echo "CC: $(CC)"
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@echo "CC: $(CC)"
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@echo "LD: $(LD)"
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@echo "OBJDUMP: $(OBJDUMP)"
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@echo "OBJDUMP: $(OBJDUMP)"
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@echo "OBJCOPY: $(OBJCOPY)"
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@echo "OBJCOPY: $(OBJCOPY)"
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@echo "SIZE: $(SIZE)"
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@echo "SIZE: $(SIZE)"
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@echo "---------------- Info: C Lib ----------------"
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@echo "---------------- Info: Libraries ----------------"
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@echo "CLIB: $(LIBC_PATH)"
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@echo "LIBGCC:"
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@echo "GCCLIB: $(LIBGCC_PATH)"
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@$(CC) -print-libgcc-file-name
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@echo "SEARCH-DIRS:"
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@$(CC) -print-search-dirs
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@echo "---------------- Info: Flags ----------------"
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@echo "---------------- Info: Flags ----------------"
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@echo "CC_OPTS: $(CC_OPTS)"
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@echo "CC_OPTS: $(CC_OPTS)"
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@echo "LD_OPTS: $(LD_OPTS)"
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@echo "---------------- Info: Host Native GCC Flags ----------------"
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@echo "---------------- Info: Host Native GCC ----------------"
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@echo "CC_X86: $(CC_X86)"
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@echo "CC_X86: $(CC_X86)"
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# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
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# Show final ELF details (just for debugging)
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# Show final ELF details (just for debugging)
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