diff options
Diffstat (limited to 'core/tasks/kernel.mk')
| -rw-r--r-- | core/tasks/kernel.mk | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/core/tasks/kernel.mk b/core/tasks/kernel.mk new file mode 100644 index 0000000..fab7722 --- /dev/null +++ b/core/tasks/kernel.mk @@ -0,0 +1,364 @@ +# Copyright (C) 2012 The CyanogenMod Project +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +# Android makefile to build kernel as a part of Android Build +# +# Configuration +# ============= +# +# These config vars are usually set in BoardConfig.mk: +# +# TARGET_KERNEL_SOURCE = Kernel source dir, optional, defaults +# to kernel/$(TARGET_DEVICE_DIR) +# TARGET_KERNEL_CONFIG = Kernel defconfig +# TARGET_KERNEL_VARIANT_CONFIG = Variant defconfig, optional +# TARGET_KERNEL_SELINUX_CONFIG = SELinux defconfig, optional +# TARGET_KERNEL_ADDITIONAL_CONFIG = Additional defconfig, optional +# TARGET_KERNEL_ARCH = Kernel Arch +# TARGET_KERNEL_HEADER_ARCH = Optional Arch for kernel headers if +# different from TARGET_KERNEL_ARCH +# TARGET_USES_UNCOMPRESSED_KERNEL = 'true' if Kernel is uncompressed, +# optional, defaults to false +# TARGET_KERNEL_CROSS_COMPILE_PREFIX = Compiler prefix (e.g. aarch64-linux-android-) +# defaults to arm-eabi- +# +# BOARD_KERNEL_IMAGE_NAME = Built image name, optional, +# defaults to Image.gz on arm64 +# defaults to Image if TARGET_USES_UNCOMPRESSED_KERNEL +# defaults to zImage otherwise +# +# KERNEL_TOOLCHAIN_PREFIX = Overrides TARGET_KERNEL_CROSS_COMPILE_PREFIX, +# Set this var in shell to override +# toolchain specified in BoardConfig.mk +# KERNEL_TOOLCHAIN = Path to toolchain, if unset, assumes +# TARGET_KERNEL_CROSS_COMPILE_PREFIX +# is in PATH +# USE_CCACHE = Enable ccache (global Android flag) +# +# NEED_KERNEL_MODULE_ROOT = Optional, if true, install kernel +# modules in root instead of system + + +TARGET_AUTO_KDIR := $(shell echo $(TARGET_DEVICE_DIR) | sed -e 's/^device/kernel/g') + +## Externally influenced variables +# kernel location - optional, defaults to kernel/<vendor>/<device> +TARGET_KERNEL_SOURCE ?= $(TARGET_AUTO_KDIR) +KERNEL_SRC := $(TARGET_KERNEL_SOURCE) +# kernel configuration - mandatory +KERNEL_DEFCONFIG := $(TARGET_KERNEL_CONFIG) +VARIANT_DEFCONFIG := $(TARGET_KERNEL_VARIANT_CONFIG) +SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG) + +## Internal variables +KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ +KERNEL_CONFIG := $(KERNEL_OUT)/.config +KERNEL_OUT_STAMP := $(KERNEL_OUT)/.mkdir_stamp + +TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH)) +ifeq ($(TARGET_KERNEL_ARCH),) +KERNEL_ARCH := $(TARGET_ARCH) +else +KERNEL_ARCH := $(TARGET_KERNEL_ARCH) +endif + +ifeq ($(KERNEL_ARCH),x86_64) +KERNEL_DEFCONFIG_ARCH := x86 +else +KERNEL_DEFCONFIG_ARCH := $(KERNEL_ARCH) +endif +KERNEL_DEFCONFIG_SRC := $(KERNEL_SRC)/arch/$(KERNEL_DEFCONFIG_ARCH)/configs/$(KERNEL_DEFCONFIG) + +TARGET_KERNEL_HEADER_ARCH := $(strip $(TARGET_KERNEL_HEADER_ARCH)) +ifeq ($(TARGET_KERNEL_HEADER_ARCH),) +KERNEL_HEADER_ARCH := $(KERNEL_ARCH) +else +KERNEL_HEADER_ARCH := $(TARGET_KERNEL_HEADER_ARCH) +endif + +KERNEL_HEADER_DEFCONFIG := $(strip $(KERNEL_HEADER_DEFCONFIG)) +ifeq ($(KERNEL_HEADER_DEFCONFIG),) +KERNEL_HEADER_DEFCONFIG := $(KERNEL_DEFCONFIG) +endif + + +ifneq ($(BOARD_KERNEL_IMAGE_NAME),) + TARGET_PREBUILT_INT_KERNEL_TYPE := $(BOARD_KERNEL_IMAGE_NAME) +else + ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true) + TARGET_PREBUILT_INT_KERNEL_TYPE := Image + else + ifeq ($(KERNEL_ARCH),arm64) + TARGET_PREBUILT_INT_KERNEL_TYPE := Image.gz + else + TARGET_PREBUILT_INT_KERNEL_TYPE := zImage + endif + endif +endif + +TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/$(TARGET_PREBUILT_INT_KERNEL_TYPE) + +# Clear this first to prevent accidental poisoning from env +MAKE_FLAGS := + +ifeq ($(KERNEL_ARCH),arm64) + # Avoid "unsupported RELA relocation: 311" errors (R_AARCH64_ADR_GOT_PAGE) + MAKE_FLAGS += CFLAGS_MODULE="-fno-pic" + ifeq ($(TARGET_ARCH),arm) + KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y + endif +endif + +ifneq ($(TARGET_KERNEL_ADDITIONAL_CONFIG),) +KERNEL_ADDITIONAL_CONFIG := $(TARGET_KERNEL_ADDITIONAL_CONFIG) +KERNEL_ADDITIONAL_CONFIG_SRC := $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG) + ifeq ("$(wildcard $(KERNEL_ADDITIONAL_CONFIG_SRC))","") + $(warning TARGET_KERNEL_ADDITIONAL_CONFIG '$(TARGET_KERNEL_ADDITIONAL_CONFIG)' doesn't exist) + KERNEL_ADDITIONAL_CONFIG_SRC := /dev/null + endif +else + KERNEL_ADDITIONAL_CONFIG_SRC := /dev/null +endif + +## Do be discontinued in a future version. Notify builder about target +## kernel format requirement +ifeq ($(BOARD_KERNEL_IMAGE_NAME),) +ifeq ($(BOARD_USES_UBOOT),true) + $(error "Please set BOARD_KERNEL_IMAGE_NAME to uImage") +else ifeq ($(BOARD_USES_UNCOMPRESSED_BOOT),true) + $(error "Please set BOARD_KERNEL_IMAGE_NAME to Image") +endif +endif + +ifeq "$(wildcard $(KERNEL_SRC) )" "" + ifneq ($(TARGET_PREBUILT_KERNEL),) + HAS_PREBUILT_KERNEL := true + NEEDS_KERNEL_COPY := true + else + $(foreach cf,$(PRODUCT_COPY_FILES), \ + $(eval _src := $(call word-colon,1,$(cf))) \ + $(eval _dest := $(call word-colon,2,$(cf))) \ + $(ifeq kernel,$(_dest), \ + $(eval HAS_PREBUILT_KERNEL := true))) + endif + + ifneq ($(HAS_PREBUILT_KERNEL),) + $(warning ***************************************************************) + $(warning * Using prebuilt kernel binary instead of source *) + $(warning * THIS IS DEPRECATED, AND WILL BE DISCONTINUED *) + $(warning * Please configure your device to download the kernel *) + $(warning * source repository to $(KERNEL_SRC)) + $(warning * See http://wiki.cyanogenmod.org/w/Doc:_integrated_kernel_building) + $(warning * for more information *) + $(warning ***************************************************************) + FULL_KERNEL_BUILD := false + KERNEL_BIN := $(TARGET_PREBUILT_KERNEL) + else + $(warning ***************************************************************) + $(warning * *) + $(warning * No kernel source found, and no fallback prebuilt defined. *) + $(warning * Please make sure your device is properly configured to *) + $(warning * download the kernel repository to $(KERNEL_SRC)) + $(warning * and add the TARGET_KERNEL_CONFIG variable to BoardConfig.mk *) + $(warning * *) + $(warning * As an alternative, define the TARGET_PREBUILT_KERNEL *) + $(warning * variable with the path to the prebuilt binary kernel image *) + $(warning * in your BoardConfig.mk file *) + $(warning * *) + $(warning ***************************************************************) + $(error "NO KERNEL") + endif +else + NEEDS_KERNEL_COPY := true + ifeq ($(TARGET_KERNEL_CONFIG),) + $(warning **********************************************************) + $(warning * Kernel source found, but no configuration was defined *) + $(warning * Please add the TARGET_KERNEL_CONFIG variable to your *) + $(warning * BoardConfig.mk file *) + $(warning **********************************************************) + # $(error "NO KERNEL CONFIG") + else + #$(info Kernel source found, building it) + FULL_KERNEL_BUILD := true + KERNEL_BIN := $(TARGET_PREBUILT_INT_KERNEL) + endif +endif + +ifeq ($(FULL_KERNEL_BUILD),true) + +KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr +KERNEL_HEADERS_INSTALL_STAMP := $(KERNEL_OUT)/.headers_install_stamp + +ifeq ($(NEED_KERNEL_MODULE_ROOT),true) +KERNEL_MODULES_INSTALL := root +KERNEL_MODULES_OUT := $(TARGET_ROOT_OUT)/lib/modules +else +KERNEL_MODULES_INSTALL := system +KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules +endif + +TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)) +ifeq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),) +KERNEL_TOOLCHAIN_PREFIX ?= arm-eabi- +else +KERNEL_TOOLCHAIN_PREFIX ?= $(TARGET_KERNEL_CROSS_COMPILE_PREFIX) +endif + +ifeq ($(KERNEL_TOOLCHAIN),) +KERNEL_TOOLCHAIN_PATH := $(KERNEL_TOOLCHAIN_PREFIX) +else +ifneq ($(KERNEL_TOOLCHAIN_PREFIX),) +KERNEL_TOOLCHAIN_PATH := $(KERNEL_TOOLCHAIN)/$(KERNEL_TOOLCHAIN_PREFIX) +endif +endif + +ifneq ($(USE_CCACHE),) + ccache := $(ANDROID_BUILD_TOP)/prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache + # Check that the executable is here. + ccache := $(strip $(wildcard $(ccache))) +endif + +KERNEL_CROSS_COMPILE := CROSS_COMPILE="$(ccache) $(KERNEL_TOOLCHAIN_PATH)" +ccache = + +define mv-modules + mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\ + if [ "$$mdpath" != "" ];then\ + mpath=`dirname $$mdpath`;\ + ko=`find $$mpath/kernel -type f -name *.ko`;\ + for i in $$ko; do $(KERNEL_TOOLCHAIN_PATH)strip --strip-unneeded $$i;\ + mv $$i $(KERNEL_MODULES_OUT)/; done;\ + fi +endef + +define clean-module-folder + mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\ + if [ "$$mdpath" != "" ];then\ + mpath=`dirname $$mdpath`; rm -rf $$mpath;\ + fi +endef + +ifeq ($(HOST_OS),darwin) + MAKE_FLAGS += C_INCLUDE_PATH=$(ANDROID_BUILD_TOP)/external/elfutils/src/libelf/ +endif + +ifeq ($(TARGET_KERNEL_MODULES),) + TARGET_KERNEL_MODULES := no-external-modules +endif + +$(KERNEL_OUT_STAMP): + $(hide) mkdir -p $(KERNEL_OUT) + $(hide) rm -rf $(KERNEL_MODULES_OUT) + $(hide) mkdir -p $(KERNEL_MODULES_OUT) + $(hide) touch $@ + +KERNEL_ADDITIONAL_CONFIG_OUT := $(KERNEL_OUT)/.additional_config + +.PHONY: force_additional_config +$(KERNEL_ADDITIONAL_CONFIG_OUT): force_additional_config + $(hide) cmp -s $(KERNEL_ADDITIONAL_CONFIG_SRC) $@ || cp $(KERNEL_ADDITIONAL_CONFIG_SRC) $@; + +$(KERNEL_CONFIG): $(KERNEL_OUT_STAMP) $(KERNEL_DEFCONFIG_SRC) $(KERNEL_ADDITIONAL_CONFIG_OUT) + @echo -e ${CL_GRN}"Building Kernel Config"${CL_RST} + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_DEFCONFIG) + $(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \ + echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \ + echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) oldconfig; fi + $(hide) if [ ! -z "$(KERNEL_ADDITIONAL_CONFIG)" ]; then \ + echo "Using additional config '$(KERNEL_ADDITIONAL_CONFIG)'"; \ + $(KERNEL_SRC)/scripts/kconfig/merge_config.sh -m -O $(KERNEL_OUT) $(KERNEL_OUT)/.config $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG); \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) KCONFIG_ALLCONFIG=$(KERNEL_OUT)/.config alldefconfig; fi + +TARGET_KERNEL_BINARIES: $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL_STAMP) + @echo -e ${CL_GRN}"Building Kernel"${CL_RST} + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(TARGET_PREBUILT_INT_KERNEL_TYPE) + $(hide) if grep -q 'CONFIG_OF=y' $(KERNEL_CONFIG) ; \ + then \ + echo -e ${CL_GRN}"Building DTBs"${CL_RST} ; \ + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) dtbs ; \ + else \ + echo "DTBs not enabled" ; \ + fi ; + $(hide) if grep -q 'CONFIG_MODULES=y' $(KERNEL_CONFIG) ; \ + then \ + echo -e ${CL_GRN}"Building Kernel Modules"${CL_RST} ; \ + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) modules && \ + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) INSTALL_MOD_PATH=../../$(KERNEL_MODULES_INSTALL) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) modules_install && \ + $(mv-modules) && \ + $(clean-module-folder) ; \ + else \ + echo "Kernel Modules not enabled" ; \ + fi ; + + +$(TARGET_KERNEL_MODULES): TARGET_KERNEL_BINARIES + +$(TARGET_PREBUILT_INT_KERNEL): $(TARGET_KERNEL_MODULES) + $(mv-modules) + $(clean-module-folder) + +$(KERNEL_HEADERS_INSTALL_STAMP): $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG) + @echo -e ${CL_GRN}"Building Kernel Headers"${CL_RST} + $(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \ + rm -f ../$(KERNEL_CONFIG); \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_HEADER_DEFCONFIG); \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) $(KERNEL_CROSS_COMPILE) headers_install; fi + $(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \ + echo "Used a different defconfig for header generation"; \ + rm -f ../$(KERNEL_CONFIG); \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_DEFCONFIG); fi + $(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \ + echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \ + echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) oldconfig; fi + $(hide) if [ ! -z "$(KERNEL_ADDITIONAL_CONFIG)" ]; then \ + echo "Using additional config '$(KERNEL_ADDITIONAL_CONFIG)'"; \ + $(KERNEL_SRC)/scripts/kconfig/merge_config.sh -m -O $(KERNEL_OUT) $(KERNEL_OUT)/.config $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG); \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) KCONFIG_ALLCONFIG=$(KERNEL_OUT)/.config alldefconfig; fi + $(hide) touch $@ + +# provide this rule because there are dependencies on this throughout the repo +$(KERNEL_HEADERS_INSTALL): $(KERNEL_HEADERS_INSTALL_STAMP) + +kerneltags: $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG) + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) tags + +kernelconfig: KERNELCONFIG_MODE := menuconfig +kernelxconfig: KERNELCONFIG_MODE := xconfig +kernelxconfig kernelconfig: $(KERNEL_OUT_STAMP) + $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNEL_DEFCONFIG) + env KCONFIG_NOTIMESTAMP=true \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNELCONFIG_MODE) + env KCONFIG_NOTIMESTAMP=true \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) savedefconfig + cp $(KERNEL_OUT)/defconfig $(KERNEL_DEFCONFIG_SRC) + +alldefconfig: $(KERNEL_OUT_STAMP) + env KCONFIG_NOTIMESTAMP=true \ + $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) alldefconfig + +endif # FULL_KERNEL_BUILD + +## Install it + +ifeq ($(NEEDS_KERNEL_COPY),true) +file := $(INSTALLED_KERNEL_TARGET) +ALL_PREBUILT += $(file) +$(file) : $(KERNEL_BIN) | $(ACP) + $(transform-prebuilt-to-target) + +ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET) +endif |