Android-P: Merge into android platform build

Change-Id: Ia807111917a538f66d6317d7e4537cee27563a03
Signed-off-by: Youngwan Kim <y103.kim@samsung.com>

diff --git a/AndroidKernel.mk b/AndroidKernel.mk
new file mode 100644 (file)
index 0000000..cc4fe65
--- /dev/null
+++ b/AndroidKernel.mk
@@ -0,0 +1,97 @@
+#Android makefile to build kernel as a part of Android Build
+
+ifeq ($(KERNEL_DEFCONFIG),)
+$(error KERNEL_DEFCONFIG must be set as environment variable)
+endif
+
+ifeq ($(INSTALLED_KERNEL_TARGET),)
+INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
+ifneq ($(BOARD_DTBO_SUPPORT),)
+INSTALLED_DTBO_TARGET := $(PRODUCT_OUT)/dtbo.img
+endif #BOARD_DTBO_SUPPORT
+INSTALLED_DTB_TARGET := $(PRODUCT_OUT)/dtb.img
+endif
+
+TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH))
+ifeq ($(TARGET_KERNEL_ARCH),)
+KERNEL_ARCH := arm64
+else
+KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
+endif
+
+ifeq ($(CROSS_COMPILE),)
+KERNEL_CROSS_COMPILE := aarch64-linux-android-
+else
+KERNEL_CROSS_COMPILE := $(CROSS_COMPILE)
+endif
+
+ifeq ($(CLANG_TRIPLE),)
+CLANG_TRIPLE := aarch64-linux-gnu-
+else
+CLANG_TRIPLE := $(CLANG_TRIPLE)
+endif
+
+ifeq ($(TARGET_PREBUILT_KERNEL),)
+
+TARGET_KERNEL_SOURCE := kernel/$(TARGET_KERNEL)
+KERNEL_CONFIG := $(TARGET_KERNEL_SOURCE)/.config
+KERNEL_BOOT := $(TARGET_KERNEL_SOURCE)/arch/$(KERNEL_ARCH)/boot
+KERNEL_BIN := $(KERNEL_BOOT)/Image
+KERNEL_DTB_DIR := $(KERNEL_BOOT)/dts/exynos
+KERNEL_DTB := $(KERNEL_DTB_DIR)/exynos9610-erd9610.dtb
+ifneq ($(BOARD_DTBO_SUPPORT),)
+KERNEL_DTBO_CFG := $(KERNEL_DTB_DIR)/exynos9610_dtboimg.cfg
+endif #BOARD_DTBO_SUPPORT
+MKDTIMG := $(HOST_OUT_EXECUTABLES)/mkdtimg
+
+ifeq ($(KERNEL_DEFCONFIG),)
+$(error Kernel configuration not defined, cannot build kernel)
+else
+
+ifeq ($(N_KERNEL_BUILD_THREAD),)
+N_KERNEL_BUILD_THREAD := 1
+endif
+
+TARGET_PREBUILT_KERNEL := $(KERNEL_BIN)
+
+.PHONY: remove-bins
+remove-bin:
+       $(hide) echo "Clean Up prebuilts"
+       rm -f $(KERNEL_CONFIG)
+       rm -f $(KERNEL_BIN)
+       rm -f $(KERNEL_DTB)
+       rm -f $(INSTALLED_KERNEL_TARGET)
+       rm -f $(INSTALLED_DTBO_TARGET)
+       rm -f $(INSTALLED_DTB_TARGET)
+
+.PHONY: kernel
+kernel: $(KERNEL_BIN)
+
+.PHONY: kernel-distclean
+kernel-distclean:
+       $(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) distclean
+
+$(KERNEL_CONFIG): remove-bins
+       $(hide) echo "make $(KERNEL_DEFCONFIG)"
+       $(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_DEFCONFIG)
+
+$(KERNEL_BIN): $(KERNEL_CONFIG)
+       $(hide) echo "Building kernel..."
+       $(MAKE) -C $(TARGET_KERNEL_SOURCE) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) CLANG_TRIPLE=$(CLANG_TRIPLE) CC=clang -j$(N_KERNEL_BUILD_THREAD)
+
+ifneq ($(BOARD_DTBO_SUPPORT),)
+$(INSTALLED_KERNEL_TARGET): $(KERNEL_BIN) $(MKDTIMG)
+       cp $(KERNEL_BIN) $(INSTALLED_KERNEL_TARGET)
+       cp $(KERNEL_DTB) $(INSTALLED_DTB_TARGET)
+       $(hide) echo "Building DTBO..."
+       ln -sf $(TARGET_KERNEL_SOURCE)/arch
+       $(MKDTIMG) cfg_create $(INSTALLED_DTBO_TARGET) $(KERNEL_DTBO_CFG)
+       rm -f arch
+else #BOARD_DTBO_SUPPORT
+$(INSTALLED_KERNEL_TARGET): $(KERNEL_BIN) $(MKDTIMG)
+       cp $(KERNEL_BIN) $(INSTALLED_KERNEL_TARGET)
+       cp $(KERNEL_DTB) $(INSTALLED_DTB_TARGET)
+endif #BOARD_DTBO_SUPPORT
+
+endif #TARGET_PREBUILT_KERNEL
+endif #KERNEL_DEFCONFIG