Compile Android Kernel from sources

tulip-chiphd/AndroidBoard.mk

@@ -1 +1,3 @@
-LOCAL_PATH := $(call my-dir)
+LOCAL_PATH := $(call my-dir)
+
+include $(LOCAL_PATH)/AndroidKernel.mk

tulip-chiphd/AndroidKernel.mk

@@ -0,0 +1,121 @@
+ifeq ($(TARGET_KERNEL_BUILT_FROM_SOURCE),true)
+
+# Force using bash as a shell, otherwise, on Ubuntu, dash will break some
+# dependency due to its bad handling of echo \1
+MAKE += SHELL=/bin/bash
+
+ifeq ($(KERNEL_CFG_NAME),)
+$(error cannot build kernel, config not specified)
+endif
+
+KERNEL_MODULES_TO_ROOT := nand.ko sunxi_tr.ko disp.ko hdmi.ko sw-device.ko gslX680new.ko
+
+KERNEL_TOOLCHAIN_ARCH := $(TARGET_KERNEL_ARCH)
+KERNEL_EXTRA_FLAGS := ANDROID_TOOLCHAIN_FLAGS="-mno-android -Werror"
+KERNEL_CROSS_COMP := $(notdir $(TARGET_TOOLS_PREFIX))
+
+KERNEL_CCACHE :=$(firstword $(TARGET_CC))
+KERNEL_PATH := $(ANDROID_BUILD_TOP)/vendor/pine64/support
+ifeq ($(notdir $(KERNEL_CCACHE)),ccache)
+KERNEL_CROSS_COMP := "ccache $(KERNEL_CROSS_COMP)"
+KERNEL_PATH := $(KERNEL_PATH):$(ANDROID_BUILD_TOP)/$(dir $(KERNEL_CCACHE))
+endif
+
+#remove time_macros from ccache options, it breaks signing process
+KERNEL_CCSLOP := $(filter-out time_macros,$(subst $(comma), ,$(CCACHE_SLOPPINESS)))
+KERNEL_CCSLOP := $(subst $(space),$(comma),$(KERNEL_CCSLOP))
+
+KERNEL_OUT_DIR := $(ANDROID_BUILD_TOP)/$(PRODUCT_OUT)/linux/kernel
+KERNEL_MODINSTALL := modules_install
+KERNEL_OUT_MODINSTALL := $(KERNEL_OUT_DIR)/$(KERNEL_MODINSTALL)
+KERNEL_MODULES_ROOT := $(PRODUCT_OUT)/root
+KERNEL_MODULES_VENDOR := $(PRODUCT_OUT)/system/vendor/modules
+KERNEL_CONFIG := $(KERNEL_OUT_DIR)/.config
+KERNEL_SAVE_DEFCONFIG := $(KERNEL_OUT_DIR)/defconfig
+KERNEL_BLD_FLAGS := \
+    ARCH=$(TARGET_KERNEL_ARCH) \
+    INSTALL_MOD_PATH=$(KERNEL_MODINSTALL) \
+    $(KERNEL_EXTRA_FLAGS)
+
+KERNEL_BLD_FLAGS :=$(KERNEL_BLD_FLAGS) \
+     O=$(KERNEL_OUT_DIR) \
+
+KERNEL_BLD_ENV := CROSS_COMPILE=$(KERNEL_CROSS_COMP) \
+    PATH=$(KERNEL_PATH):$(PATH) \
+    CCACHE_SLOPPINESS=$(KERNEL_CCSLOP)
+KERNEL_FAKE_DEPMOD := $(KERNEL_OUT_DIR)/fakedepmod/lib/modules
+
+KERNEL_DEFCONFIG ?= $(KERNEL_SRC_DIR)/arch/$(TARGET_KERNEL_ARCH)/configs/$(KERNEL_CFG_NAME)_defconfig
+KERNEL_VERSION_FILE := $(KERNEL_OUT_DIR)/include/config/kernel.release
+KERNEL_BZIMAGE := $(PRODUCT_OUT)/kernel
+
+$(KERNEL_CONFIG): $(KERNEL_DEFCONFIG)
+	$(hide) echo Regenerating kernel config $(KERNEL_OUT_DIR)
+	$(hide) mkdir -p $(KERNEL_OUT_DIR)
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) $(notdir $(KERNEL_DEFCONFIG))
+
+ifeq (,$(filter build_kernel-nodeps,$(MAKECMDGOALS)))
+$(KERNEL_BZIMAGE): $(MINIGZIP)
+endif
+
+$(KERNEL_BZIMAGE): $(KERNEL_CONFIG)
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS)
+	$(hide) cp -f $(KERNEL_OUT_DIR)/arch/arm64/boot/Image $@
+
+$(KERNEL_OUT_MODINSTALL): $(KERNEL_CONFIG)
+	@mkdir -p $(KERNEL_OUT_MODINSTALL)
+	@$(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) modules_install
+	@touch $@
+
+mrproper_kernel:
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) mrproper
+
+clean_kernel:
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) clean
+	$(hide) rm -rf $(KERNEL_OUT_MODINSTALL)
+
+menuconfig xconfig gconfig: $(KERNEL_CONFIG)
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) $@
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) savedefconfig
+	$(hide) cp -f $(KERNEL_SAVE_DEFCONFIG) $(KERNEL_DEFCONFIG)
+	$(hide) echo ===========
+	$(hide) echo $(KERNEL_DEFCONFIG) has been modified !
+	$(hide) echo ===========
+
+build_kernel: $(KERNEL_BZIMAGE)
+
+modules_install: $(KERNEL_OUT_MODINSTALL)
+
+copy_modules_to_root: modules_install
+	@for module in $(KERNEL_MODULES_TO_ROOT); do \
+		find $(KERNEL_OUT_MODINSTALL)/lib/modules/`cat $(KERNEL_VERSION_FILE)` -name "$${module}" \
+			-exec cp -f {} $(KERNEL_MODULES_ROOT)/ \; ; \
+	done
+
+copy_modules_to_system: modules_install
+	@rm -rf $(KERNEL_MODULES_VENDOR)
+	@mkdir -p $(KERNEL_MODULES_VENDOR)
+	@for module in $$(find $(KERNEL_OUT_MODINSTALL)/lib/modules/`cat $(KERNEL_VERSION_FILE)` -name "*.ko"); do \
+		cp -f "$${module}" $(KERNEL_MODULES_VENDOR)/ ; \
+	done
+
+TAGS_files := TAGS
+tags_files := tags
+gtags_files := GTAGS GPATH GRTAGS GSYMS
+cscope_files := $(addprefix cscope.,files out out.in out.po)
+
+TAGS tags gtags cscope: $(KERNEL_CONFIG)
+	$(hide) $(KERNEL_BLD_ENV) $(MAKE) -C $(KERNEL_SRC_DIR) $(KERNEL_BLD_FLAGS) $@
+	$(hide) rm -f $(KERNEL_SRC_DIR)/$($@_files)
+	$(hide) cp -fs $(addprefix `pwd`/$(KERNEL_OUT_DIR)/,$($@_files)) $(KERNEL_SRC_DIR)/
+
+.PHONY: menuconfig xconfig gconfig
+.PHONY: build_kernel build_kernel-nodeps copy_modules_to_root copy_modules_to_system
+
+$(PRODUCT_OUT)/boot.img: build_kernel
+
+$(PRODUCT_OUT)/ramdisk.img: copy_modules_to_root
+
+$(PRODUCT_OUT)/system.img: copy_modules_to_system
+
+endif #TARGET_KERNEL_BUILT_FROM_SOURCE

tulip-chiphd/device.mk

@@ -1,6 +1,5 @@
 $(call inherit-product, device/softwinner/tulip-common/tulip_64_bit.mk)
 $(call inherit-product, device/softwinner/tulip-common/tulip-common.mk)
-$(call inherit-product-if-exists, device/softwinner/tulip-chiphd/modules/modules.mk)
 $(call inherit-product, frameworks/native/build/tablet-7in-xhdpi-2048-dalvik-heap.mk)
 $(call inherit-product, hardware/realtek/bluetooth/firmware/rtlbtfw_cfg.mk)
 
@@ -22,6 +21,7 @@ ifeq ($(TARGET_PREBUILT_KERNEL),)
 LOCAL_KERNEL := device/softwinner/tulip-chiphd/kernel
 else
 LOCAL_KERNEL := $(TARGET_PREBUILT_KERNEL)
+PRODUCT_COPY_FILES += $(TARGET_PREBUILT_KERNEL_MODULES)
 endif
 
 PRODUCT_COPY_FILES += \
@@ -42,13 +42,7 @@ PRODUCT_COPY_FILES += \
     device/softwinner/tulip-chiphd/init.sun50iw1p1.rc:root/init.sun50iw1p1.rc \
     device/softwinner/tulip-chiphd/init.recovery.sun50iw1p1.rc:root/init.recovery.sun50iw1p1.rc \
     device/softwinner/tulip-chiphd/ueventd.sun50iw1p1.rc:root/ueventd.sun50iw1p1.rc \
-    device/softwinner/tulip-chiphd/recovery.fstab:recovery.fstab \
-    device/softwinner/tulip-chiphd/modules/modules/nand.ko:root/nand.ko \
-    device/softwinner/tulip-chiphd/modules/modules/sunxi_tr.ko:root/sunxi_tr.ko \
-    device/softwinner/tulip-chiphd/modules/modules/disp.ko:root/disp.ko \
-    device/softwinner/tulip-chiphd/modules/modules/hdmi.ko:root/hdmi.ko \
-    device/softwinner/tulip-chiphd/modules/modules/sw-device.ko:obj/sw-device.ko \
-    device/softwinner/tulip-chiphd/modules/modules/gslX680new.ko:obj/gslX680new.ko
+    device/softwinner/tulip-chiphd/recovery.fstab:recovery.fstab
 
 PRODUCT_COPY_FILES += \
     device/softwinner/tulip-chiphd/twrp.fstab:recovery/root/etc/twrp.fstab