Subversion Repositories neorv32

# -----------------------------------------------------------------------------

# USER CONFIGURATION

# -----------------------------------------------------------------------------

# User's application sources (*.c, *.cpp, *.s, *.S); add additional files here

APP_SRC ?= $(wildcard ./*.c) $(wildcard ./*.s) $(wildcard ./*.cpp) $(wildcard ./*.S)

# User's application include folders (don't forget the '-I' before each entry)

APP_INC ?= -I .

# User's application include folders - for assembly files only (don't forget the '-I' before each entry)

ASM_INC ?= -I .

# Optimization

EFFORT ?= -Os

# Compiler toolchain

RISCV_PREFIX ?= riscv32-unknown-elf-

# CPU architecture and ABI

MARCH ?= -march=rv32i

MABI  ?= -mabi=ilp32

# User flags for additional configuration (will be added to compiler flags)

USER_FLAGS ?=

# Relative or absolute path to the NEORV32 home folder

NEORV32_HOME ?= ../../..

# -----------------------------------------------------------------------------

# NEORV32 framework

# -----------------------------------------------------------------------------

# Path to NEORV32 linker script and startup file

NEORV32_COM_PATH = $(NEORV32_HOME)/sw/common

# Path to main NEORV32 library include files

NEORV32_INC_PATH = $(NEORV32_HOME)/sw/lib/include

# Path to main NEORV32 library source files

NEORV32_SRC_PATH = $(NEORV32_HOME)/sw/lib/source

# Path to NEORV32 executable generator

NEORV32_EXG_PATH = $(NEORV32_HOME)/sw/image_gen

# Path to NEORV32 core rtl folder

NEORV32_RTL_PATH = $(NEORV32_HOME)/rtl/core

# Marker file to check for NEORV32 home folder

NEORV32_HOME_MARKER = $(NEORV32_INC_PATH)/neorv32.h

# Core libraries (peripheral and CPU drivers)

CORE_SRC  = $(wildcard $(NEORV32_SRC_PATH)/*.c)

# Application start-up code

CORE_SRC += $(NEORV32_COM_PATH)/crt0.S

# Linker script

LD_SCRIPT = $(NEORV32_COM_PATH)/neorv32.ld

# Main output files

APP_EXE  = neorv32_exe.bin

APP_HEX  = neorv32_exe.hex

APP_ASM  = main.asm

APP_IMG  = neorv32_application_image.vhd

BOOT_IMG = neorv32_bootloader_image.vhd

# -----------------------------------------------------------------------------

# Sources and objects

# -----------------------------------------------------------------------------

# Define all sources

SRC  = $(APP_SRC)

SRC += $(CORE_SRC)

# Define all object files

OBJ = $(SRC:%=%.o)

# -----------------------------------------------------------------------------

# Tools and flags

# -----------------------------------------------------------------------------

# Compiler tools

CC      = $(RISCV_PREFIX)gcc

OBJDUMP = $(RISCV_PREFIX)objdump

OBJCOPY = $(RISCV_PREFIX)objcopy

SIZE    = $(RISCV_PREFIX)size

# Host native compiler

CC_X86 = g++ -Wall -O -g

# NEORV32 executable image generator

IMAGE_GEN = $(NEORV32_EXG_PATH)/image_gen

# Compiler & linker flags

CC_OPTS  = $(MARCH) $(MABI) $(EFFORT) -Wall -ffunction-sections -fdata-sections -nostartfiles -mno-fdiv

CC_OPTS += -Wl,--gc-sections -lm -lc -lgcc -lc

# This accelerates instruction fetch after branches when C extension is enabled (irrelevant when C extension is disabled)

CC_OPTS += -falign-functions=4 -falign-labels=4 -falign-loops=4 -falign-jumps=4

CC_OPTS += $(USER_FLAGS)

# -----------------------------------------------------------------------------

# Application output definitions

# -----------------------------------------------------------------------------

.PHONY: check info help elf_info clean clean_all bootloader

.DEFAULT_GOAL := help

# 'compile' is still here for compatibility

exe:     $(APP_ASM) $(APP_EXE)

hex:     $(APP_ASM) $(APP_HEX)

compile: $(APP_ASM) $(APP_EXE)

install: $(APP_ASM) $(APP_IMG)

all:     $(APP_ASM) $(APP_EXE) $(APP_IMG) $(APP_HEX)

# Check if making bootloader

# Use different base address and legth for instruction memory/"rom" (BOOTMEM instead of IMEM)

# Also define "make_bootloader" for crt0.S

target bootloader: CC_OPTS += -Wl,--defsym=make_bootloader=1 -Dmake_bootloader

# -----------------------------------------------------------------------------

# Image generator targets

# -----------------------------------------------------------------------------

# install/compile tools

$(IMAGE_GEN): $(NEORV32_EXG_PATH)/image_gen.cpp

        @echo Compiling $(IMAGE_GEN)

        @$(CC_X86) $< -o $(IMAGE_GEN)

# -----------------------------------------------------------------------------

# General targets: Assemble, compile, link, dump

# -----------------------------------------------------------------------------

# Compile app *.s sources (assembly)

%.s.o: %.s

        @$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(ASM_INC) $< -o $@

# Compile app *.S sources (assembly + C pre-processor)

%.S.o: %.S

        @$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(ASM_INC) $< -o $@

# Compile app *.c sources

%.c.o: %.c

        @$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) $< -o $@

# Compile app *.cpp sources

%.cpp.o: %.cpp

        @$(CC) -c $(CC_OPTS) -I $(NEORV32_INC_PATH) $(APP_INC) $< -o $@

# Link object files and show memory utilization

main.elf: $(OBJ)

        @$(CC) $(CC_OPTS) -T $(LD_SCRIPT) $(OBJ) -o $@ -lm

        @echo "Memory utilization:"

        @$(SIZE) main.elf

# Assembly listing file (for debugging)

$(APP_ASM): main.elf

        @$(OBJDUMP) -d -S -z  $< > $@

# Generate final executable from .text + .rodata + .data (in THIS order!)

main.bin: main.elf $(APP_ASM)

        @$(OBJCOPY) -I elf32-little $< -j .text   -O binary text.bin

        @$(OBJCOPY) -I elf32-little $< -j .rodata -O binary rodata.bin

        @$(OBJCOPY) -I elf32-little $< -j .data   -O binary data.bin

        @cat text.bin rodata.bin data.bin > $@

        @rm -f text.bin rodata.bin data.bin

# -----------------------------------------------------------------------------

# Application targets: Generate binary executable, install (as VHDL file)

# -----------------------------------------------------------------------------

# Generate NEORV32 executable image for upload via bootloader

$(APP_EXE): main.bin $(IMAGE_GEN)

        @set -e

        @$(IMAGE_GEN) -app_bin $< $@ $(shell basename $(CURDIR))

        @echo "Executable ($(APP_EXE)) size in bytes:"

        @wc -c < $(APP_EXE)

# Generate NEORV32 executable VHDL boot image

$(APP_IMG): main.bin $(IMAGE_GEN)

        @set -e

        @$(IMAGE_GEN) -app_img $< $@ $(shell basename $(CURDIR))

        @echo "Installing application image to $(NEORV32_RTL_PATH)/$(APP_IMG)"

        @cp $(APP_IMG) $(NEORV32_RTL_PATH)/.

# Generate NEORV32 executable image in plain hex format

$(APP_HEX): main.bin $(IMAGE_GEN)

        @set -e

        @$(IMAGE_GEN) -app_hex $< $@ $(shell basename $(CURDIR))

# -----------------------------------------------------------------------------

# Bootloader targets

# -----------------------------------------------------------------------------

# Create and install bootloader VHDL init image

$(BOOT_IMG): main.bin $(IMAGE_GEN)

        @set -e

        @$(IMAGE_GEN) -bld_img $< $(BOOT_IMG) $(shell basename $(CURDIR))

        @echo "Installing bootloader image to $(NEORV32_RTL_PATH)/$(BOOT_IMG)"

        @cp $(BOOT_IMG) $(NEORV32_RTL_PATH)/.

# Just an alias that

bootloader: $(BOOT_IMG)

# -----------------------------------------------------------------------------

# Check toolchain

# -----------------------------------------------------------------------------

check: $(IMAGE_GEN)

        @echo "---------------- Check: NEORV32_HOME folder ----------------"

ifneq ($(shell [ -e $(NEORV32_HOME_MARKER) ] && echo 1 || echo 0 ), 1)

$(error NEORV32_HOME folder not found!)

endif

        @echo "NEORV32_HOME: $(NEORV32_HOME)"

        @echo "---------------- Check: $(CC) ----------------"

        @$(CC) -v

        @echo "---------------- Check: $(OBJDUMP) ----------------"

        @$(OBJDUMP) -V

        @echo "---------------- Check: $(OBJCOPY) ----------------"

        @$(OBJCOPY) -V

        @echo "---------------- Check: $(SIZE) ----------------"

        @$(SIZE) -V

        @echo "---------------- Check: NEORV32 image_gen ----------------"

        @$(IMAGE_GEN) -help

        @echo "---------------- Check: Native GCC ----------------"

        @$(CC_X86) -v

        @echo

        @echo "Toolchain check OK"

# -----------------------------------------------------------------------------

# Show configuration

# -----------------------------------------------------------------------------

info:

        @echo "---------------- Info: Project ----------------"

        @echo "Project folder:        $(shell basename $(CURDIR))"

        @echo "Source files:          $(APP_SRC)"

        @echo "Include folder(s):     $(APP_INC)"

        @echo "ASM include folder(s): $(ASM_INC)"

        @echo "---------------- Info: NEORV32 ----------------"

        @echo "NEORV32 home folder (NEORV32_HOME): $(NEORV32_HOME)"

        @echo "IMAGE_GEN: $(IMAGE_GEN)"

        @echo "Core source files:"

        @echo "$(CORE_SRC)"

        @echo "Core include folder:"

        @echo "$(NEORV32_INC_PATH)"

        @echo "---------------- Info: Objects ----------------"

        @echo "Project object files:"

        @echo "$(OBJ)"

        @echo "---------------- Info: RISC-V CPU ----------------"

        @echo "MARCH:      $(MARCH)"

        @echo "MABI:       $(MABI)"

        @echo "---------------- Info: Toolchain ----------------"

        @echo "Toolchain:  $(RISCV_TOLLCHAIN)"

        @echo "CC:         $(CC)"

        @echo "OBJDUMP:    $(OBJDUMP)"

        @echo "OBJCOPY:    $(OBJCOPY)"

        @echo "SIZE:       $(SIZE)"

        @echo "---------------- Info: Compiler Configuration ----------------"

        @$(CC) -v

        @echo "---------------- Info: Compiler Libraries ----------------"

        @echo "LIBGCC:"

        @$(CC) -print-libgcc-file-name

        @echo "SEARCH-DIRS:"

        @$(CC) -print-search-dirs

        @echo "---------------- Info: Flags ----------------"

        @echo "USER_FLAGS: $(USER_FLAGS)"

        @echo "CC_OPTS:    $(CC_OPTS)"

        @echo "---------------- Info: Host Native GCC Flags ----------------"

        @echo "CC_X86:     $(CC_X86)"

# -----------------------------------------------------------------------------

# Show final ELF details (just for debugging)

# -----------------------------------------------------------------------------

elf_info: main.elf

        @$(OBJDUMP) -x main.elf

# -----------------------------------------------------------------------------

# Help

# -----------------------------------------------------------------------------

help:

        @echo "<<< NEORV32 Application Makefile >>>"

        @echo "Make sure to add the bin folder of RISC-V GCC to your PATH variable."

        @echo "Targets:"

        @echo " help       - show this text"

        @echo " check      - check toolchain"

        @echo " info       - show makefile/toolchain configuration"

        @echo " exe        - compile and generate  executable for upload via bootloader"

        @echo " hex        - compile and generate  executable raw file"

        @echo " install    - compile, generate and install VHDL IMEM boot image (for application)"

        @echo " all        - exe + hex + install"

        @echo " elf_info   - show ELF layout info"

        @echo " clean      - clean up project"

        @echo " clean_all  - clean up project, core libraries and image generator"

        @echo " bootloader - compile, generate and install VHDL BOOTROM boot image (for bootloader only!)"

# -----------------------------------------------------------------------------

# Clean up

# -----------------------------------------------------------------------------

clean:

        @rm -f *.elf *.o *.bin *.out *.asm *.vhd *.hex

clean_all: clean

        @rm -f $(OBJ) $(IMAGE_GEN)