AndroidKernel: Add the makefile required to build Android
The makefile invoked by the Android build system is now added to the
kernel tree.
CRs-Fixed: 2013720
Change-Id: I1613049a68f8f0f8b20979853fbc366d2c955db8
Signed-off-by: Ameya Thakur <ameyat@codeaurora.org>
Signed-off-by: Bhargav Gurappadi <bhargavg1@codeaurora.org>
Signed-off-by: Bruce Levy <blevy@codeaurora.org>
diff --git a/AndroidKernel.mk b/AndroidKernel.mk
new file mode 100644
index 0000000..d28f7ba
--- /dev/null
+++ b/AndroidKernel.mk
@@ -0,0 +1,168 @@
+#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 $$?))
+ifeq ($(strip $(KERNEL_GCC_NOANDROID_CHK)),0)
+KERNEL_CFLAGS := KCFLAGS=-mno-android
+endif
+
+mkfile_path := $(abspath $(lastword $(MAKEFILE_LIST)))
+current_dir := $(notdir $(patsubst %/,%,$(dir $(mkfile_path))))
+TARGET_KERNEL := msm-$(TARGET_KERNEL_VERSION)
+ifeq ($(TARGET_KERNEL),$(current_dir))
+ # New style, kernel/msm-version
+ BUILD_ROOT_LOC := ../../
+ TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL)
+ KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/kernel/$(TARGET_KERNEL)
+ KERNEL_SYMLINK := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+ KERNEL_USR := $(KERNEL_SYMLINK)/usr
+else
+ # Legacy style, kernel source directly under kernel
+ KERNEL_LEGACY_DIR := true
+ BUILD_ROOT_LOC := ../
+ TARGET_KERNEL_SOURCE := kernel
+ KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+endif
+
+KERNEL_CONFIG := $(KERNEL_OUT)/.config
+
+ifeq ($(KERNEL_DEFCONFIG)$(wildcard $(KERNEL_CONFIG)),)
+$(error Kernel configuration not defined, cannot build kernel)
+else
+
+ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
+$(info Using uncompressed kernel)
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image
+else
+ifeq ($(KERNEL_ARCH),arm64)
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/Image.gz
+else
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/zImage
+endif
+endif
+
+ifeq ($(TARGET_KERNEL_APPEND_DTB), true)
+$(info Using appended DTB)
+TARGET_PREBUILT_INT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)-dtb
+endif
+
+KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
+KERNEL_MODULES_INSTALL := system
+KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules
+
+TARGET_PREBUILT_KERNEL := $(TARGET_PREBUILT_INT_KERNEL)
+
+define mv-modules
+mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.dep`;\
+if [ "$$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=$(KERNEL_CROSS_COMPILE) headers_install;\
+ if [ -d "$(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); \
+ $(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