diff options
Diffstat (limited to 'AndroidKernel.mk')
| -rw-r--r-- | AndroidKernel.mk | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/AndroidKernel.mk b/AndroidKernel.mk new file mode 100644 index 000000000000..3db9ac9f0bcb --- /dev/null +++ b/AndroidKernel.mk @@ -0,0 +1,167 @@ +#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 $$?)) +ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0) +KERNEL_CFLAGS := KCFLAGS=-mno-android +endif + +mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST))) +current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path)))) +ifeq ($(TARGET_KERNEL_VERSION),) + TARGET_KERNEL_VERSION := 3.18 +endif +TARGET_KERNEL := msm-$(TARGET_KERNEL_VERSION) +ifeq ($(TARGET_KERNEL),$(current_dir)) + # New style, kernel/msm-version + BUILD_ROOT_LOC := ../../ + TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL) + KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/kernel/$(TARGET_KERNEL) + KERNEL_SYMLINK := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ + KERNEL_USR := $(KERNEL_SYMLINK)/usr +else + # Legacy style, kernel source directly under kernel + KERNEL_LEGACY_DIR := true + BUILD_ROOT_LOC := ../ + TARGET_KERNEL_SOURCE := kernel + KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ +endif + +KERNEL_CONFIG := $(KERNEL_OUT)/.config + +ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),) +$(error Kernel configuration not defined, cannot build kernel) +else + +ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true) +$(info Using uncompressed kernel) +TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image +else +ifeq ($(KERNEL_ARCH),arm64) +TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz +else +TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/zImage +endif +endif + +ifeq ($(TARGET_KERNEL_APPEND_DTB), true) +$(info Using appended DTB) +TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb +endif + +KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr +KERNEL_MODULES_INSTALL := system +KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules + +TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL) + +define mv-modules +mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\ +if [ "$$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 + +ifneq ($(KERNEL_LEGACY_DIR),true) +$(KERNEL_USR): $(KERNEL_HEADERS_INSTALL) + rm -rf $(KERNEL_SYMLINK) + ln -s kernel/$(TARGET_KERNEL) $(KERNEL_SYMLINK) + +$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_USR) +endif + +$(KERNEL_OUT): + mkdir -p $(KERNEL_OUT) + +$(KERNEL_CONFIG): $(KERNEL_OUT) + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(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 $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(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 $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_CFLAGS) + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_CFLAGS) modules + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) INSTALL_MOD_PATH=$(BUILD_ROOT_LOC)../$(KERNEL_MODULES_INSTALL) INSTALL_MOD_STRIP=1 ARCH=$(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 \ + rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \ + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_HEADER_DEFCONFIG); \ + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) headers_install; fi + $(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \ + echo "Used a different defconfig for header generation"; \ + rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \ + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(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 $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) oldconfig; fi + +kerneltags: $(KERNEL_OUT) $(KERNEL_CONFIG) + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) tags + +kernelconfig: $(KERNEL_OUT) $(KERNEL_CONFIG) + env KCONFIG_NOTIMESTAMP=true \ + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) menuconfig + env KCONFIG_NOTIMESTAMP=true \ + $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) savedefconfig + cp $(KERNEL_OUT)/defconfig $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_DEFCONFIG) + +endif +endif |