AndroidKernel.mk: snapshot support for building in the Android build system

This snapshot is taken as of msm-3.14 commit 3bc54cf86b (Merge "msm:
camera: Add dummy sub module in sensor pipeline")

Signed-off-by: Matt Wagantall <mattw@codeaurora.org>

AndroidKernel.mk

+#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 $$?))
+ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0)
+KERNEL_CFLAGS := KCFLAGS=-mno-android
+endif
+
+KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+KERNEL_CONFIG := $(KERNEL_OUT)/.config
+
+ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),)
+$(error Kernel configuration not defined, cannot build kernel)
+else
+
+ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
+$(info Using uncompressed kernel)
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image
+else
+ifeq ($(KERNEL_ARCH),arm64)
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz
+else
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/zImage
+endif
+endif
+
+ifeq ($(TARGET_KERNEL_APPEND_DTB), true)
+$(info Using appended DTB)
+TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb
+endif
+
+KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
+KERNEL_MODULES_INSTALL := system
+KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules
+
+TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)
+
+define mv-modules
+mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\
+if [ "$$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
+
+$(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); \
+			$(MAKE) -C kernel O=../$(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"; \
+			$(hide) rm -f ../$(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