| #Android makefile to build kernel as a part of Android Build |
| PERL = perl |
| |
| KERNEL_TARGET := $(strip $(INSTALLED_KERNEL_TARGET)) |
| ifeq ($(KERNEL_TARGET),) |
| INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel |
| endif |
| |
| TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH)) |
| ifeq ($(TARGET_KERNEL_ARCH),) |
| KERNEL_ARCH := arm |
| else |
| KERNEL_ARCH := $(TARGET_KERNEL_ARCH) |
| endif |
| |
| TARGET_KERNEL_HEADER_ARCH := $(strip $(TARGET_KERNEL_HEADER_ARCH)) |
| ifeq ($(TARGET_KERNEL_HEADER_ARCH),) |
| KERNEL_HEADER_ARCH := $(KERNEL_ARCH) |
| else |
| $(warning Forcing kernel header generation only for '$(TARGET_KERNEL_HEADER_ARCH)') |
| KERNEL_HEADER_ARCH := $(TARGET_KERNEL_HEADER_ARCH) |
| endif |
| |
| KERNEL_HEADER_DEFCONFIG := $(strip $(KERNEL_HEADER_DEFCONFIG)) |
| ifeq ($(KERNEL_HEADER_DEFCONFIG),) |
| KERNEL_HEADER_DEFCONFIG := $(KERNEL_DEFCONFIG) |
| endif |
| |
| # Force 32-bit binder IPC for 64bit kernel with 32bit userspace |
| ifeq ($(KERNEL_ARCH),arm64) |
| ifeq ($(TARGET_ARCH),arm) |
| KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y |
| endif |
| endif |
| |
| TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)) |
| ifeq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),) |
| KERNEL_CROSS_COMPILE := arm-eabi- |
| else |
| KERNEL_CROSS_COMPILE := $(TARGET_KERNEL_CROSS_COMPILE_PREFIX) |
| endif |
| |
| ifeq ($(TARGET_PREBUILT_KERNEL),) |
| |
| KERNEL_GCC_NOANDROID_CHK := $(shell (echo "int main() {return 0;}" | $(KERNEL_CROSS_COMPILE)gcc -E -mno-android - > /dev/null 2>&1 ; echo $$?)) |
| ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0) |
| KERNEL_CFLAGS := KCFLAGS=-mno-android |
| endif |
| |
| KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ |
| KERNEL_CONFIG := $(KERNEL_OUT)/.config |
| |
| ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),) |
| $(error Kernel configuration not defined, cannot build kernel) |
| else |
| |
| ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true) |
| $(info Using uncompressed kernel) |
| TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image |
| else |
| TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz |
| endif |
| |
| ifeq ($(TARGET_KERNEL_APPEND_DTB), true) |
| $(info Using appended DTB) |
| TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb |
| endif |
| |
| KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr |
| KERNEL_MODULES_INSTALL := system |
| KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules |
| |
| TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL) |
| |
| define mv-modules |
| mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\ |
| if [ "$$mdpath" != "" ];then\ |
| mpath=`dirname $$mdpath`;\ |
| ko=`find $$mpath/kernel -type f -name *.ko`;\ |
| for i in $$ko; do mv $$i $(KERNEL_MODULES_OUT)/; done;\ |
| fi |
| endef |
| |
| define clean-module-folder |
| mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\ |
| if [ "$$mdpath" != "" ];then\ |
| mpath=`dirname $$mdpath`; rm -rf $$mpath;\ |
| fi |
| endef |
| |
| $(KERNEL_OUT): |
| mkdir -p $(KERNEL_OUT) |
| |
| $(KERNEL_CONFIG): $(KERNEL_OUT) |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(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; \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) oldconfig; fi |
| |
| $(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL) |
| $(hide) echo "Building kernel..." |
| $(hide) rm -rf $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_CFLAGS) |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_CFLAGS) modules |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) INSTALL_MOD_PATH=../../$(KERNEL_MODULES_INSTALL) INSTALL_MOD_STRIP=1 ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) modules_install |
| $(mv-modules) |
| $(clean-module-folder) |
| |
| $(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT) |
| $(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \ |
| $(hide) rm -f ../$(KERNEL_CONFIG); \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_HEADER_DEFCONFIG); \ |
| if test "$(TARGET_COMPILE_WITH_MSM_KERNEL)" = "true"; then \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) headers_install; fi \ |
| fi |
| $(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \ |
| echo "Used a different defconfig for header generation"; \ |
| $(hide) rm -f ../$(KERNEL_CONFIG); \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(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; \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) oldconfig; fi |
| |
| kerneltags: $(KERNEL_OUT) $(KERNEL_CONFIG) |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) tags |
| |
| kernelconfig: $(KERNEL_OUT) $(KERNEL_CONFIG) |
| env KCONFIG_NOTIMESTAMP=true \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) menuconfig |
| env KCONFIG_NOTIMESTAMP=true \ |
| $(MAKE) -C kernel O=../$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) savedefconfig |
| cp $(KERNEL_OUT)/defconfig kernel/arch/$(KERNEL_ARCH)/configs/$(KERNEL_DEFCONFIG) |
| |
| endif |
| endif |