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AndroidKernel.mk
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AndroidKernel.mk
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#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 := $(PRODUCT_OUT)/kernel
endif
ifneq ($(TARGET_KERNEL_APPEND_DTB), true)
$(info Using DTB Image)
INSTALLED_DTBIMAGE_TARGET := $(PRODUCT_OUT)/dtb.img
endif
MAKE_ARGS := $(strip $(TARGET_KERNEL_MAKE_ARGS))
KERNEL_DISABLE_DEBUGFS := $(TARGET_KERNEL_DISABLE_DEBUGFS)
TARGET_KERNEL_MAKE_ENV := $(strip $(TARGET_KERNEL_MAKE_ENV))
ifeq ($(TARGET_KERNEL_MAKE_ENV),)
KERNEL_MAKE_ENV :=
else
KERNEL_MAKE_ENV := $(TARGET_KERNEL_MAKE_ENV)
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 := $(TARGET_KERNEL_HEADER_ARCH)
endif
ifeq ($(shell echo $(KERNEL_DEFCONFIG) | grep vendor),)
KERNEL_DEFCONFIG := $(KERNEL_DEFCONFIG)
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 ($(TARGET_ARCH),arm)
KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y
endif
endif
ifeq ($(FACTORY_BUILD),1)
KERNEL_CONFIG_OVERRIDE_FACTORY := CONFIG_FACTORY_BUILD=y
KERNEL_CONFIG_OVERRIDE_DEVMEM := CONFIG_DEVMEM=y
endif
ifeq ($(ENABLE_MIUI_DEBUGGING),true)
OVERRIDE_DEBUG_FS := true
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 := $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)
endif
ifeq ($(KERNEL_LLVM_SUPPORT), true)
ifeq ($(KERNEL_SD_LLVM_SUPPORT), true) #Using sd-llvm compiler
ifeq ($(shell echo $(SDCLANG_PATH) | head -c 1),/)
KERNEL_LLVM_BIN := $(SDCLANG_PATH)/clang
else
KERNEL_LLVM_BIN := $(shell pwd)/$(SDCLANG_PATH)/clang
endif
$(warning "Using sdllvm" $(KERNEL_LLVM_BIN))
else
KERNEL_LLVM_BIN := $(shell pwd)/$(CLANG) #Using aosp-llvm compiler
$(warning "Using aosp-llvm" $(KERNEL_LLVM_BIN))
endif
endif
ifeq ($(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 $$?))
real_cc :=
ifeq ($(KERNEL_LLVM_SUPPORT),true)
ifeq ($(KERNEL_ARCH), arm64)
real_cc := REAL_CC=$(KERNEL_LLVM_BIN) CLANG_TRIPLE=aarch64-linux-gnu-
else
real_cc := REAL_CC=$(KERNEL_LLVM_BIN) CLANG_TRIPLE=arm-linux-gnueabihf
endif
else
ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0)
KERNEL_CFLAGS := KCFLAGS=-mno-android
endif
endif
mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
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
# Add RTIC DTB to dtb.img if RTIC MPGen is enabled.
# Note: unfortunately we can't define RTIC DTS + DTB rule here as the
# following variable/ tools (needed for DTS generation)
# are missing - DTB_OBJS, OBJDUMP, KCONFIG_CONFIG, CC, DTC_FLAGS (the only available is DTC).
# The existing RTIC kernel integration in scripts/link-vmlinux.sh generates RTIC MP DTS
# that will be compiled with optional rule below.
# To be safe, we check for MPGen enable.
ifdef RTIC_MPGEN
RTIC_DTB := $(KERNEL_SYMLINK)/rtic_mp.dtb
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_DEBUGFS := $(KERNEL_OUT)/tmp
KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
KERNEL_MODULES_INSTALL ?= system
KERNEL_MODULES_OUT ?= $(PRODUCT_OUT)/$(KERNEL_MODULES_INSTALL)/lib/modules
TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)
BOARD_VENDOR_KERNEL_MODULES += $(wildcard $(KERNEL_MODULES_OUT)/*.ko)
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): $(KERNEL_DEBUGFS)
mkdir -p $(KERNEL_OUT)
ifneq ($(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_EXTLINK_FILES := $(TARGET_KERNEL_SOURCE)/drivers/staging/rtmm \
$(TARGET_KERNEL_SOURCE)/include/linux/rtmm.h \
$(TARGET_KERNEL_SOURCE)/drivers/staging/ktrace \
$(TARGET_KERNEL_SOURCE)/include/linux/ktrace.h
TZ ?= $(shell cat /etc/timezone)
$(warning TZ for kernel build: $(TZ))
link_ext:
echo "Creating kernel symbol link to miui/kernel."
rm -rf $(KERNEL_EXTLINK_FILES)
if [ -f "$(abspath miui/kernel/memory/rtmm/include/linux/rtmm.h)" ]; then \
ln -s -f $(abspath miui/kernel/memory/rtmm) $(TARGET_KERNEL_SOURCE)/drivers/staging/rtmm; \
ln -s -f $(abspath miui/kernel/trace/ktrace) $(TARGET_KERNEL_SOURCE)/drivers/staging/ktrace; \
ln -s -f $(abspath miui/kernel/memory/rtmm/include/linux/rtmm.h) $(TARGET_KERNEL_SOURCE)/include/linux/rtmm.h; \
ln -s -f $(abspath miui/kernel/trace/ktrace/include/linux/ktrace.h) $(TARGET_KERNEL_SOURCE)/include/linux/ktrace.h; fi
.PHONY:link_ext
$(KERNEL_OUT): link_ext
mkdir -p $(KERNEL_OUT)
$(KERNEL_CONFIG): $(KERNEL_OUT)
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG)
$(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \
echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \
echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi
ifeq ($(TARGET_KERNEL_APPEND_DTB), true)
TARGET_PREBUILT_INT_KERNEL_IMAGE := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image
$(TARGET_PREBUILT_INT_KERNEL_IMAGE): $(KERNEL_USR)
$(TARGET_PREBUILT_INT_KERNEL_IMAGE): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL)
$(hide) echo "Building kernel modules..."
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) Image
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) modules
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) INSTALL_MOD_PATH=$(BUILD_ROOT_LOC)../$(KERNEL_MODULES_INSTALL) INSTALL_MOD_STRIP=1 $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) modules_install
$(mv-modules)
$(clean-module-folder)
$(TARGET_PREBUILT_INT_KERNEL): $(TARGET_PREBUILT_INT_KERNEL_IMAGE)
$(hide) echo "Building kernel..."
$(hide) rm -rf $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS)
else
TARGET_PREBUILT_INT_KERNEL_IMAGE := $(TARGET_PREBUILT_INT_KERNEL)
$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL)
$(hide) echo "Building kernel..."
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS)
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) modules
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) INSTALL_MOD_PATH=$(BUILD_ROOT_LOC)../$(KERNEL_MODULES_INSTALL) INSTALL_MOD_STRIP=1 $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) modules_install
$(mv-modules)
$(clean-module-folder)
endif
$(KERNEL_DEBUGFS):
KERNEL_DIR=$(TARGET_KERNEL_SOURCE) \
DEFCONFIG=$(KERNEL_DEFCONFIG) \
OUT_DIR=$(KERNEL_OUT) \
ARCH=$(KERNEL_ARCH) \
CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) \
DISABLE_DEBUGFS=$(KERNEL_DISABLE_DEBUGFS) \
ENABLE_DEBUG_FS=$(OVERRIDE_DEBUG_FS) \
$(TARGET_KERNEL_SOURCE)/disable_dbgfs.sh \
$(real_cc) \
$(TARGET_KERNEL_MAKE_ARGS)
$(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT)
$(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \
rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG) && \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_HEADER_DEFCONFIG) && \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) headers_install && \
if [ -d "$(KERNEL_HEADERS_INSTALL)/include/bringup_headers" ]; then \
cp -Rf $(KERNEL_HEADERS_INSTALL)/include/bringup_headers/* $(KERNEL_HEADERS_INSTALL)/include/ ;\
fi ;\
fi
$(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \
echo "Used a different defconfig for header generation"; \
rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG); fi
$(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \
echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \
echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi
$(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE_FACTORY)" ]; then \
echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE_FACTORY)'"; \
echo $(KERNEL_CONFIG_OVERRIDE_FACTORY) >> $(KERNEL_OUT)/.config; \
echo $(KERNEL_CONFIG_OVERRIDE_DEVMEM) >>$(KERNEL_OUT)/.config; \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi
# RTIC DTS to DTB (if MPGen enabled;
# and make sure we don't break the build if rtic_mp.dts missing)
$(RTIC_DTB): $(INSTALLED_KERNEL_TARGET)
stat $(KERNEL_SYMLINK)/rtic_mp.dts 2>/dev/null >&2 && \
$(DTC) -O dtb -o $(RTIC_DTB) -b 1 $(DTC_FLAGS) $(KERNEL_SYMLINK)/rtic_mp.dts || \
touch $(RTIC_DTB)
# Creating a dtb.img once the kernel is compiled if TARGET_KERNEL_APPEND_DTB is set to be false
$(INSTALLED_DTBIMAGE_TARGET): $(TARGET_PREBUILT_INT_KERNEL) $(INSTALLED_KERNEL_TARGET) $(RTIC_DTB)
$(hide) if [ -d "$(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/vendor/" ]; then \
cat $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/vendor/qcom/*.dtb $(RTIC_DTB) > $@; \
else \
cat $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/qcom/*.dtb $(RTIC_DTB) > $@; \
fi
.PHONY: kerneltags
kerneltags: $(KERNEL_OUT) $(KERNEL_CONFIG)
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) tags
.PHONY: kernelconfig
kernelconfig: $(KERNEL_OUT) $(KERNEL_CONFIG)
env KCONFIG_NOTIMESTAMP=true \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) menuconfig
env KCONFIG_NOTIMESTAMP=true \
TZ=$(TZ) $(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) savedefconfig
cp $(KERNEL_OUT)/defconfig $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_DEFCONFIG)
endif
endif