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#
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
KERNEL_BUILD:=1
include $(INCLUDE_DIR)/host.mk
include $(INCLUDE_DIR)/kernel.mk
LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
LINUX_SITE:=http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
http://www.kernel.org/pub/linux/kernel/v$(KERNEL) \
http://www.de.kernel.org/pub/linux/kernel/v$(KERNEL)
LINUX_CONFIG:=./config
ifneq (,$(findstring uml,$(BOARD)))
LINUX_KARCH:=um
else
LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
-e 's/mipsel/mips/' \
-e 's/mipseb/mips/' \
-e 's/powerpc/ppc/' \
-e 's/sh[234]/sh/' \
-e 's/armeb/arm/' \
)
endif
KERNELNAME=
ifneq (,$(findstring x86,$(BOARD)))
KERNELNAME="bzImage"
endif
ifneq (,$(findstring ppc,$(BOARD)))
KERNELNAME="uImage"
endif
define Kernel/Prepare/Default
bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
[ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches
[ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
endef
define Kernel/Prepare
$(call Kernel/Prepare/Default)
endef
define Kernel/Configure/2.4
$(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
$(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
$(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
endef
define Kernel/Configure/2.6
$(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
endef
define Kernel/Configure/Default
@$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
$(call Kernel/Configure/$(KERNEL))
endef
define Kernel/Configure
$(call Kernel/Configure/Default)
endef
define Kernel/CompileModules/Default
$(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
$(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
endef
define Kernel/CompileModules
$(call Kernel/CompileModules/Default)
endef
ifeq ($(KERNEL),2.6)
ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
define Kernel/SetInitramfs
mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
mkdir -p $(BUILD_DIR)/root/etc/init.d
$(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
endef
else
define Kernel/SetInitramfs
mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
endef
endif
endif
define Kernel/CompileImage/Default
$(call Kernel/SetInitramfs)
$(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
$(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
endef
define Kernel/CompileImage
$(call Kernel/CompileImage/Default)
endef
define Kernel/Clean/Default
rm -f $(LINUX_DIR)/.linux-compile
rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
rm -f $(LINUX_KERNEL)
$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
endef
define Kernel/Clean
$(call Kernel/Clean/Default)
endef
define BuildKernel
ifneq ($(LINUX_SITE),)
$(DL_DIR)/$(LINUX_SOURCE):
-mkdir -p $(DL_DIR)
$(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
endif
$(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
-rm -rf $(KERNEL_BUILD_DIR)
-mkdir -p $(KERNEL_BUILD_DIR)
$(call Kernel/Prepare)
touch $$@
$(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
$(call Kernel/Configure)
touch $$@
$(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
rm -rf $(KERNEL_BUILD_DIR)/modules
@rm -f $(BUILD_DIR)/linux
ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
$(call Kernel/CompileModules)
touch $$@
$(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
$(call Kernel/CompileImage)
touch $$@
mostlyclean: FORCE
$(call Kernel/Clean)
define BuildKernel
endef
endef
download: $(DL_DIR)/$(LINUX_SOURCE)
prepare: $(LINUX_DIR)/.configured $(TOPDIR)/.kernel.mk
compile: $(LINUX_DIR)/.modules
install: $(LINUX_DIR)/.image
clean: FORCE
rm -f $(STAMP_DIR)/.linux-compile
rm -rf $(KERNEL_BUILD_DIR)
rebuild: FORCE
@$(MAKE) mostlyclean
@if [ -f $(LINUX_KERNEL) ]; then \
$(MAKE) clean; \
fi
@$(MAKE) compile
$(TOPDIR)/.kernel.mk: Makefile
echo "CONFIG_BOARD:=$(BOARD)" > $@
echo "CONFIG_KERNEL:=$(KERNEL)" >> $@
echo "CONFIG_LINUX_VERSION:=$(LINUX_VERSION)" >> $@
echo "CONFIG_LINUX_RELEASE:=$(LINUX_RELEASE)" >> $@
echo "CONFIG_LINUX_KARCH:=$(LINUX_KARCH)" >> $@
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