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Android.mk
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# Copyright (C) 2012 The CyanogenMod Project
# Copyright (C) 2015 Chirayu Desai
#
# 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
ifeq ($(BUILD_KERNEL),true)
ifeq ($(PRODUCT_PLATFORM_SOD),true)
ifeq ($(SOMC_KERNEL_VERSION),4.9)
KERNEL_SRC := $(call my-dir)
## Internal variables
ifeq ($(OUT_DIR),out)
KERNEL_OUT := $(shell pwd)/$(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
else
KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
endif
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
# kernel configuration - mandatory:
TARGET_KERNEL_CONFIG ?= $(notdir $(wildcard $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/aosp_*_$(TARGET_DEVICE)_defconfig))
KERNEL_DEFCONFIG := $(TARGET_KERNEL_CONFIG)
KERNEL_DEFCONFIG_ARCH := $(KERNEL_ARCH)
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)
KERNEL_DTB := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/qcom
KERNEL_DTB_OUT := $(PRODUCT_OUT)/dtbs
ifneq ($(BOARD_DTBO_IMAGE_NAME),)
TARGET_PREBUILT_INT_DTBO_NAME := $(BOARD_DTBO_IMAGE_NAME)
else
TARGET_PREBUILT_INT_DTBO_NAME := dtbo-$(KERNEL_ARCH).img
endif
KERNEL_DTBO_OUT := $(PRODUCT_OUT)/$(TARGET_PREBUILT_INT_DTBO_NAME)
# 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
KERNEL_BIN := $(TARGET_PREBUILT_INT_KERNEL)
KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
KERNEL_HEADERS_INSTALL_STAMP := $(KERNEL_OUT)/.headers_install_stamp
KERNEL_MODULES_INSTALL := system
KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules
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 := $(shell pwd)/prebuilts/misc/$(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 $$mpath;\
fi
endef
ifeq ($(HOST_OS),darwin)
ifeq (1,$(filter 1,$(shell echo "$$(( $(PLATFORM_SDK_VERSION) >= 24 ))" )))
MAKE_FLAGS += C_INCLUDE_PATH=$(shell pwd)/external/elfutils/libelf/
else
MAKE_FLAGS += C_INCLUDE_PATH=$(shell pwd)/external/elfutils/src/libelf/
endif
endif
ifeq ($(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) rm -rf $(KERNEL_DTB_OUT)
$(hide) mkdir -p $(KERNEL_DTB_OUT)
$(hide) rm -rf $(KERNEL_DTBO_OUT)
$(hide) touch $@
$(KERNEL_CONFIG): $(KERNEL_OUT_STAMP) $(KERNEL_DEFCONFIG_SRC)
@echo "Building Kernel Config"
$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(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
TARGET_KERNEL_BINARIES: $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL_STAMP) | $(ACP)
@echo "Building Kernel"
$(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 "Building DTBs" ; \
$(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) dtbs ; \
else \
echo "DTBs not enabled" ; \
fi ;
$(ACP) -fp $(KERNEL_DTB)/*.dtb $(KERNEL_DTB_OUT)/
$(hide) if grep -q 'CONFIG_MODULES=y' $(KERNEL_CONFIG) ; \
then \
echo "Building Kernel Modules" ; \
$(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 "Building Kernel Headers"
$(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \
rm -f ../$(KERNEL_CONFIG); \
$(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) $(KERNEL_CROSS_COMPILE) $(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) $(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
# 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: $(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) menuconfig
env KCONFIG_NOTIMESTAMP=true \
$(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) savedefconfig
cp $(KERNEL_OUT)/defconfig $(KERNEL_DEFCONFIG_SRC)
ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
TARGET_PREBUILT_DTBO := $(KERNEL_DTBO_OUT)
$(TARGET_PREBUILT_DTBO): TARGET_KERNEL_BINARIES $(AVBTOOL)
echo -e ${CL_GRN}"Building DTBO.img"${CL_RST}
$(KERNEL_SRC)/scripts/mkdtboimg.py create $(KERNEL_DTBO_OUT) --page_size=${BOARD_KERNEL_PAGESIZE} `find $(KERNEL_DTB) -name "*.dtbo"`
$(AVBTOOL) add_hash_footer \
--image $@ \
--partition_size $(BOARD_DTBOIMG_PARTITION_SIZE) \
--partition_name dtbo $(INTERNAL_AVB_DTBO_SIGNING_ARGS) \
$(BOARD_AVB_DTBO_ADD_HASH_FOOTER_ARGS)
endif # TARGET_NEEDS_DTBOIMAGE
## Install it
.PHONY: $(PRODUCT_OUT)/kernel
$(PRODUCT_OUT)/kernel: $(KERNEL_BIN)
cp $(KERNEL_BIN) $(PRODUCT_OUT)/kernel
ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
.PHONY: $(PRODUCT_OUT)/dtbo.img
$(PRODUCT_OUT)/dtbo.img: $(KERNEL_DTBO_OUT)
cp $(KERNEL_DTBO_OUT) $(PRODUCT_OUT)/dtbo.img
endif # TARGET_NEEDS_DTBOIMAGE
endif # Sony Kernel version
endif # Sony AOSP devices
endif # BUILD_KERNEL