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279 lines
12 KiB
279 lines
12 KiB
#Android makefile to build kernel as a part of Android Build
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PERL = perl
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KERNEL_TARGET := $(strip $(INSTALLED_KERNEL_TARGET))
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ifeq ($(KERNEL_TARGET),)
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INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
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endif
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ifneq ($(TARGET_KERNEL_APPEND_DTB), true)
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$(info Using DTB Image)
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INSTALLED_DTBIMAGE_TARGET := $(PRODUCT_OUT)/dtb.img
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endif
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MAKE_ARGS := $(strip $(TARGET_KERNEL_MAKE_ARGS))
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KERNEL_DISABLE_DEBUGFS := $(TARGET_KERNEL_DISABLE_DEBUGFS)
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# Samsung specific Kconfig
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ifeq ( ,$(findstring VARIANT_DEFCONFIG, $(KERNEL_DEFCONFIG)))
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KERNEL_DEFCONFIG += VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) \
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DEBUG_DEFCONFIG=$(DEBUG_DEFCONFIG) \
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SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) \
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SELINUX_LOG_DEFCONFIG=$(SELINUX_LOG_DEFCONFIG) \
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DMVERITY_DEFCONFIG=$(DMVERITY_DEFCONFIG) \
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KASLR_DEFCONFIG=$(KASLR_DEFCONFIG)
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endif
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TARGET_KERNEL_MAKE_ENV := $(strip $(TARGET_KERNEL_MAKE_ENV))
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ifeq ($(TARGET_KERNEL_MAKE_ENV),)
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KERNEL_MAKE_ENV :=
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else
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KERNEL_MAKE_ENV := $(TARGET_KERNEL_MAKE_ENV)
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endif
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TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH))
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ifeq ($(TARGET_KERNEL_ARCH),)
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KERNEL_ARCH := arm
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else
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KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
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endif
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TARGET_KERNEL_HEADER_ARCH := $(strip $(TARGET_KERNEL_HEADER_ARCH))
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ifeq ($(TARGET_KERNEL_HEADER_ARCH),)
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KERNEL_HEADER_ARCH := $(KERNEL_ARCH)
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else
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$(warning Forcing kernel header generation only for '$(TARGET_KERNEL_HEADER_ARCH)')
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KERNEL_HEADER_ARCH := $(TARGET_KERNEL_HEADER_ARCH)
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endif
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#ifeq ($(shell echo $(KERNEL_DEFCONFIG) | grep vendor),)
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#KERNEL_DEFCONFIG := vendor/$(KERNEL_DEFCONFIG)
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#endif
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KERNEL_HEADER_DEFCONFIG := $(strip $(KERNEL_HEADER_DEFCONFIG))
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ifeq ($(KERNEL_HEADER_DEFCONFIG),)
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KERNEL_HEADER_DEFCONFIG := $(KERNEL_DEFCONFIG)
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endif
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# Force 32-bit binder IPC for 64bit kernel with 32bit userspace
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ifeq ($(KERNEL_ARCH),arm64)
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ifeq ($(TARGET_ARCH),arm)
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KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y
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endif
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endif
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TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX))
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ifeq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),)
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KERNEL_CROSS_COMPILE := arm-eabi-
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else
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KERNEL_CROSS_COMPILE := $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)
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endif
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ifeq ($(KERNEL_LLVM_SUPPORT), true)
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ifeq ($(KERNEL_SD_LLVM_SUPPORT), true) #Using sd-llvm compiler
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ifeq ($(shell echo $(SDCLANG_PATH) | head -c 1),/)
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KERNEL_LLVM_BIN := $(SDCLANG_PATH)/clang
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else
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KERNEL_LLVM_BIN := $(shell pwd)/$(SDCLANG_PATH)/clang
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endif
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$(warning "Using sdllvm" $(KERNEL_LLVM_BIN))
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else
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KERNEL_LLVM_BIN := $(shell pwd)/$(CLANG) #Using aosp-llvm compiler
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$(warning "Using aosp-llvm" $(KERNEL_LLVM_BIN))
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endif
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endif
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ifeq ($(TARGET_PREBUILT_KERNEL),)
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KERNEL_GCC_NOANDROID_CHK := $(shell (echo "int main() {return 0;}" | $(KERNEL_CROSS_COMPILE)gcc -E -mno-android - > /dev/null 2>&1 ; echo $$?))
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real_cc :=
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ifeq ($(KERNEL_LLVM_SUPPORT),true)
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ifeq ($(KERNEL_ARCH), arm64)
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real_cc := REAL_CC=$(KERNEL_LLVM_BIN) CLANG_TRIPLE=aarch64-linux-gnu-
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else
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real_cc := REAL_CC=$(KERNEL_LLVM_BIN) CLANG_TRIPLE=arm-linux-gnueabihf
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endif
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else
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ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0)
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KERNEL_CFLAGS := KCFLAGS=-mno-android
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endif
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endif
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mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
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current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
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TARGET_KERNEL := msm-$(TARGET_KERNEL_VERSION)
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ifeq ($(TARGET_KERNEL),$(current_dir))
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# New style, kernel/msm-version
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BUILD_ROOT_LOC := ../../
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TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL)
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KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/kernel/$(TARGET_KERNEL)
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KERNEL_SYMLINK := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
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KERNEL_USR := $(KERNEL_SYMLINK)/usr
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else
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# Legacy style, kernel source directly under kernel
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KERNEL_LEGACY_DIR := true
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BUILD_ROOT_LOC := ../
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TARGET_KERNEL_SOURCE := kernel
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KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
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endif
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# Add RTIC DTB to dtb.img if RTIC MPGen is enabled.
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# Note: unfortunately we can't define RTIC DTS + DTB rule here as the
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# following variable/ tools (needed for DTS generation)
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# are missing - DTB_OBJS, OBJDUMP, KCONFIG_CONFIG, CC, DTC_FLAGS (the only available is DTC).
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# The existing RTIC kernel integration in scripts/link-vmlinux.sh generates RTIC MP DTS
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# that will be compiled with optional rule below.
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# To be safe, we check for MPGen enable.
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ifdef RTIC_MPGEN
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RTIC_DTB := $(KERNEL_SYMLINK)/rtic_mp.dtb
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endif
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KERNEL_CONFIG := $(KERNEL_OUT)/.config
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ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),)
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$(error Kernel configuration not defined, cannot build kernel)
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else
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ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
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$(info Using uncompressed kernel)
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TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image
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else
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ifeq ($(KERNEL_ARCH),arm64)
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TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz
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else
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TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/zImage
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endif
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endif
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ifeq ($(TARGET_KERNEL_APPEND_DTB), true)
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$(info Using appended DTB)
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TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb
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endif
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KERNEL_DEBUGFS := $(KERNEL_OUT)/tmp
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KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
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KERNEL_MODULES_INSTALL ?= system
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KERNEL_MODULES_OUT ?= $(PRODUCT_OUT)/$(KERNEL_MODULES_INSTALL)/lib/modules
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TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)
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#BOARD_VENDOR_KERNEL_MODULES += $(shell ls $(KERNEL_MODULES_OUT)/*.ko)
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define mv-modules
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mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\
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if [ "$$mdpath" != "" ];then\
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mpath=`dirname $$mdpath`;\
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ko=`find $$mpath/kernel -type f -name *.ko`;\
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for i in $$ko; do mv $$i $(KERNEL_MODULES_OUT)/; done;\
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fi
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endef
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define clean-module-folder
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mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\
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if [ "$$mdpath" != "" ];then\
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mpath=`dirname $$mdpath`; rm -rf $$mpath;\
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fi
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endef
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$(KERNEL_OUT): $(KERNEL_DEBUGFS)
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mkdir -p $(KERNEL_OUT)
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ifneq ($(KERNEL_LEGACY_DIR),true)
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$(KERNEL_USR): $(KERNEL_HEADERS_INSTALL)
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rm -rf $(KERNEL_SYMLINK)
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ln -s kernel/$(TARGET_KERNEL) $(KERNEL_SYMLINK)
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$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_USR)
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endif
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$(KERNEL_CONFIG): $(KERNEL_OUT)
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG)
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$(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \
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echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \
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echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi
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ifeq ($(TARGET_KERNEL_APPEND_DTB), true)
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TARGET_PREBUILT_INT_KERNEL_IMAGE := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image
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$(TARGET_PREBUILT_INT_KERNEL_IMAGE): $(KERNEL_USR)
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$(TARGET_PREBUILT_INT_KERNEL_IMAGE): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL)
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$(hide) echo "Building kernel modules..."
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) Image
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) modules
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$(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) $(real_cc) modules_install
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$(mv-modules)
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$(clean-module-folder)
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$(TARGET_PREBUILT_INT_KERNEL): $(TARGET_PREBUILT_INT_KERNEL_IMAGE)
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$(hide) echo "Building kernel..."
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$(hide) rm -rf $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts
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$(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)
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else
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TARGET_PREBUILT_INT_KERNEL_IMAGE := $(TARGET_PREBUILT_INT_KERNEL)
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$(TARGET_PREBUILT_INT_KERNEL): $(KERNEL_OUT) $(KERNEL_HEADERS_INSTALL)
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$(hide) echo "Building kernel..."
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS)
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_CFLAGS) modules
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$(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) $(real_cc) modules_install
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$(mv-modules)
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$(clean-module-folder)
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endif
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$(KERNEL_DEBUGFS):
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KERNEL_DIR=$(TARGET_KERNEL_SOURCE) \
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DEFCONFIG=$(KERNEL_DEFCONFIG) \
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OUT_DIR=$(KERNEL_OUT) \
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ARCH=$(KERNEL_ARCH) \
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CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) \
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DISABLE_DEBUGFS=$(KERNEL_DISABLE_DEBUGFS) \
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$(TARGET_KERNEL_SOURCE)/disable_dbgfs.sh \
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$(real_cc) \
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$(TARGET_KERNEL_MAKE_ARGS)
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$(KERNEL_HEADERS_INSTALL): $(KERNEL_OUT)
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$(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \
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rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG) && \
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$(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) $(KERNEL_HEADER_DEFCONFIG) && \
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_HEADER_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) headers_install && \
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if [ -d "$(KERNEL_HEADERS_INSTALL)/include/bringup_headers" ]; then \
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cp -Rf $(KERNEL_HEADERS_INSTALL)/include/bringup_headers/* $(KERNEL_HEADERS_INSTALL)/include/ ;\
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fi ;\
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fi
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$(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \
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echo "Used a different defconfig for header generation"; \
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rm -f $(BUILD_ROOT_LOC)$(KERNEL_CONFIG); \
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) $(KERNEL_DEFCONFIG); fi
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$(hide) if [ ! -z "$(KERNEL_CONFIG_OVERRIDE)" ]; then \
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echo "Overriding kernel config with '$(KERNEL_CONFIG_OVERRIDE)'"; \
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echo $(KERNEL_CONFIG_OVERRIDE) >> $(KERNEL_OUT)/.config; \
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) oldconfig; fi
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# RTIC DTS to DTB (if MPGen enabled;
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# and make sure we don't break the build if rtic_mp.dts missing)
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$(RTIC_DTB): $(INSTALLED_KERNEL_TARGET)
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stat $(KERNEL_SYMLINK)/rtic_mp.dts 2>/dev/null >&2 && \
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$(DTC) -O dtb -o $(RTIC_DTB) -b 1 $(DTC_FLAGS) $(KERNEL_SYMLINK)/rtic_mp.dts || \
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touch $(RTIC_DTB)
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# Creating a dtb.img once the kernel is compiled if TARGET_KERNEL_APPEND_DTB is set to be false
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$(INSTALLED_DTBIMAGE_TARGET): $(TARGET_PREBUILT_INT_KERNEL) $(INSTALLED_KERNEL_TARGET) $(RTIC_DTB)
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$(hide) if [ -d "$(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/vendor/" ]; then \
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cat $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/vendor/qcom/*.dtb $(RTIC_DTB) > $@; \
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else \
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cat $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/dts/qcom/*.dtb $(RTIC_DTB) > $@; \
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fi
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.PHONY: kerneltags
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kerneltags: $(KERNEL_OUT) $(KERNEL_CONFIG)
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$(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
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.PHONY: kernelconfig
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kernelconfig: $(KERNEL_OUT) $(KERNEL_CONFIG)
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env KCONFIG_NOTIMESTAMP=true \
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$(MAKE) -C $(TARGET_KERNEL_SOURCE) O=$(BUILD_ROOT_LOC)$(KERNEL_OUT) $(KERNEL_MAKE_ENV) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(real_cc) menuconfig
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env KCONFIG_NOTIMESTAMP=true \
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$(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
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cp $(KERNEL_OUT)/defconfig $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_DEFCONFIG)
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endif
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endif
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