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# Makefile - build a kernel+filesystem image for stand-alone Linux booting
#
# Copyright (C) 2011 ARM Limited. All rights reserved.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE.txt file.
# Include config file (prefer config.mk, fall back to config-default.mk)
ifneq ($(wildcard config.mk),)
include config.mk
else
include config-default.mk
endif
LIBFDTOBJS = libfdt/fdt.o libfdt/fdt_ro.o libfdt/fdt_wip.o \
libfdt/fdt_sw.o libfdt/fdt_rw.o libfdt/fdt_strerror.o
MONITOR = monitor.S
BOOTLOADER = boot.S
OBJS = boot.o c_start.o monitor.o semihosting.o string.o semi_loader.o $(LIBFDTOBJS)
KERNEL = uImage
IMAGE = linux-system.axf
SEMIIMG = linux-system-semi.axf
LD_SCRIPT = model.lds.S
CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
# These are needed by the underlying kernel make
export CROSS_COMPILE ARCH
# Build all wrappers
all: $(IMAGE) $(SEMIIMG)
# Build just the semihosting wrapper
semi: $(SEMIIMG)
clean distclean:
rm -f $(IMAGE) $(SEMIIMG) \
model.lds modelsemi.lds $(OBJS) $(KERNEL)
$(KERNEL): $(KERNEL_SRC)/arch/arm/boot/uImage
cp $< $@
$(IMAGE): $(OBJS) model.lds $(KERNEL) $(FILESYSTEM) Makefile
$(LD) -o $@ $(OBJS) --script=model.lds
$(SEMIIMG): $(OBJS) modelsemi.lds
$(LD) -o $@ $(OBJS) --script=modelsemi.lds
boot.o: $(BOOTLOADER)
$(CC) $(CPPFLAGS) -DKCMD='$(KCMD)' -c -o $@ $<
monitor.o: $(MONITOR)
$(CC) $(CPPFLAGS) -c -o $@ $<
%.o: %.c
$(CC) $(CPPFLAGS) -O2 -ffreestanding -I. -Ilibfdt -c -o $@ $<
model.lds: $(LD_SCRIPT) Makefile
$(CC) $(CPPFLAGS) -E -P -C -o $@ $<
modelsemi.lds: $(LD_SCRIPT) Makefile
$(CC) $(CPPFLAGS) -DSEMIHOSTING=1 -E -P -C -o $@ $<
$(KERNEL_SRC)/arch/arm/boot/uImage: force
$(MAKE) -C $(KERNEL_SRC) -j4 uImage
# Pass any target we don't know about through to the kernel makefile.
# This is a convenience rule so we can say 'make menuconfig' etc here.
# Note that any rules in this file must have a command or be marked as
# .PHONY.
%: force
$(MAKE) -C $(KERNEL_SRC) $@
force: ;
Makefile: ;
.PHONY: all semi clean distclean config.mk config-default.mk
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