Import CM build additions
Change-Id: Id1eb902129754e61dfcc2b5d95c3a75172ff0c5e
diff --git a/build/tasks/kernel.mk b/build/tasks/kernel.mk
new file mode 100644
index 0000000..527fb54
--- /dev/null
+++ b/build/tasks/kernel.mk
@@ -0,0 +1,373 @@
+# Copyright (C) 2012 The CyanogenMod Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# Android makefile to build kernel as a part of Android Build
+#
+# Configuration
+# =============
+#
+# These config vars are usually set in BoardConfig.mk:
+#
+# TARGET_KERNEL_SOURCE = Kernel source dir, optional, defaults
+# to kernel/$(TARGET_DEVICE_DIR)
+# TARGET_KERNEL_CONFIG = Kernel defconfig
+# TARGET_KERNEL_VARIANT_CONFIG = Variant defconfig, optional
+# TARGET_KERNEL_SELINUX_CONFIG = SELinux defconfig, optional
+# TARGET_KERNEL_ADDITIONAL_CONFIG = Additional defconfig, optional
+# TARGET_KERNEL_ARCH = Kernel Arch
+# TARGET_KERNEL_HEADER_ARCH = Optional Arch for kernel headers if
+# different from TARGET_KERNEL_ARCH
+# TARGET_USES_UNCOMPRESSED_KERNEL = 'true' if Kernel is uncompressed,
+# optional, defaults to false
+# TARGET_KERNEL_CROSS_COMPILE_PREFIX = Compiler prefix (e.g. arm-eabi-)
+# defaults to arm-linux-androideabi- for arm
+# aarch64-linux-android- for arm64
+# x86_64-linux-android- for x86
+#
+# BOARD_KERNEL_IMAGE_NAME = Built image name, optional,
+# defaults to Image.gz on arm64
+# defaults to Image if TARGET_USES_UNCOMPRESSED_KERNEL
+# defaults to zImage otherwise
+#
+# KERNEL_TOOLCHAIN_PREFIX = Overrides TARGET_KERNEL_CROSS_COMPILE_PREFIX,
+# Set this var in shell to override
+# toolchain specified in BoardConfig.mk
+# KERNEL_TOOLCHAIN = Path to toolchain, if unset, assumes
+# TARGET_KERNEL_CROSS_COMPILE_PREFIX
+# is in PATH
+# USE_CCACHE = Enable ccache (global Android flag)
+#
+# NEED_KERNEL_MODULE_ROOT = Optional, if true, install kernel
+# modules in root instead of system
+
+
+TARGET_AUTO_KDIR := $(shell echo $(TARGET_DEVICE_DIR) | sed -e 's/^device/kernel/g')
+
+## Externally influenced variables
+# kernel location - optional, defaults to kernel/<vendor>/<device>
+TARGET_KERNEL_SOURCE ?= $(TARGET_AUTO_KDIR)
+KERNEL_SRC := $(TARGET_KERNEL_SOURCE)
+# kernel configuration - mandatory
+KERNEL_DEFCONFIG := $(TARGET_KERNEL_CONFIG)
+VARIANT_DEFCONFIG := $(TARGET_KERNEL_VARIANT_CONFIG)
+SELINUX_DEFCONFIG := $(TARGET_KERNEL_SELINUX_CONFIG)
+
+## Internal variables
+KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
+KERNEL_CONFIG := $(KERNEL_OUT)/.config
+KERNEL_OUT_STAMP := $(KERNEL_OUT)/.mkdir_stamp
+
+TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH))
+ifeq ($(TARGET_KERNEL_ARCH),)
+KERNEL_ARCH := $(TARGET_ARCH)
+else
+KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
+endif
+
+ifeq ($(KERNEL_ARCH),x86_64)
+KERNEL_DEFCONFIG_ARCH := x86
+else
+KERNEL_DEFCONFIG_ARCH := $(KERNEL_ARCH)
+endif
+KERNEL_DEFCONFIG_SRC := $(KERNEL_SRC)/arch/$(KERNEL_DEFCONFIG_ARCH)/configs/$(KERNEL_DEFCONFIG)
+
+TARGET_KERNEL_HEADER_ARCH := $(strip $(TARGET_KERNEL_HEADER_ARCH))
+ifeq ($(TARGET_KERNEL_HEADER_ARCH),)
+KERNEL_HEADER_ARCH := $(KERNEL_ARCH)
+else
+KERNEL_HEADER_ARCH := $(TARGET_KERNEL_HEADER_ARCH)
+endif
+
+KERNEL_HEADER_DEFCONFIG := $(strip $(KERNEL_HEADER_DEFCONFIG))
+ifeq ($(KERNEL_HEADER_DEFCONFIG),)
+KERNEL_HEADER_DEFCONFIG := $(KERNEL_DEFCONFIG)
+endif
+
+
+ifneq ($(BOARD_KERNEL_IMAGE_NAME),)
+ TARGET_PREBUILT_INT_KERNEL_TYPE := $(BOARD_KERNEL_IMAGE_NAME)
+else
+ ifeq ($(TARGET_USES_UNCOMPRESSED_KERNEL),true)
+ TARGET_PREBUILT_INT_KERNEL_TYPE := Image
+ else
+ ifeq ($(KERNEL_ARCH),arm64)
+ TARGET_PREBUILT_INT_KERNEL_TYPE := Image.gz
+ else
+ TARGET_PREBUILT_INT_KERNEL_TYPE := zImage
+ endif
+ endif
+endif
+
+TARGET_PREBUILT_INT_KERNEL := $(KERNEL_OUT)/arch/$(KERNEL_ARCH)/boot/$(TARGET_PREBUILT_INT_KERNEL_TYPE)
+
+# Clear this first to prevent accidental poisoning from env
+MAKE_FLAGS :=
+
+ifeq ($(KERNEL_ARCH),arm64)
+ # Avoid "unsupported RELA relocation: 311" errors (R_AARCH64_ADR_GOT_PAGE)
+ MAKE_FLAGS += CFLAGS_MODULE="-fno-pic"
+ ifeq ($(TARGET_ARCH),arm)
+ KERNEL_CONFIG_OVERRIDE := CONFIG_ANDROID_BINDER_IPC_32BIT=y
+ endif
+endif
+
+ifneq ($(TARGET_KERNEL_ADDITIONAL_CONFIG),)
+KERNEL_ADDITIONAL_CONFIG := $(TARGET_KERNEL_ADDITIONAL_CONFIG)
+KERNEL_ADDITIONAL_CONFIG_SRC := $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG)
+ ifeq ("$(wildcard $(KERNEL_ADDITIONAL_CONFIG_SRC))","")
+ $(warning TARGET_KERNEL_ADDITIONAL_CONFIG '$(TARGET_KERNEL_ADDITIONAL_CONFIG)' doesn't exist)
+ KERNEL_ADDITIONAL_CONFIG_SRC := /dev/null
+ endif
+else
+ KERNEL_ADDITIONAL_CONFIG_SRC := /dev/null
+endif
+
+## Do be discontinued in a future version. Notify builder about target
+## kernel format requirement
+ifeq ($(BOARD_KERNEL_IMAGE_NAME),)
+ifeq ($(BOARD_USES_UBOOT),true)
+ $(error "Please set BOARD_KERNEL_IMAGE_NAME to uImage")
+else ifeq ($(BOARD_USES_UNCOMPRESSED_BOOT),true)
+ $(error "Please set BOARD_KERNEL_IMAGE_NAME to Image")
+endif
+endif
+
+ifeq "$(wildcard $(KERNEL_SRC) )" ""
+ ifneq ($(TARGET_PREBUILT_KERNEL),)
+ HAS_PREBUILT_KERNEL := true
+ NEEDS_KERNEL_COPY := true
+ else
+ $(foreach cf,$(PRODUCT_COPY_FILES), \
+ $(eval _src := $(call word-colon,1,$(cf))) \
+ $(eval _dest := $(call word-colon,2,$(cf))) \
+ $(ifeq kernel,$(_dest), \
+ $(eval HAS_PREBUILT_KERNEL := true)))
+ endif
+
+ ifneq ($(HAS_PREBUILT_KERNEL),)
+ $(warning ***************************************************************)
+ $(warning * Using prebuilt kernel binary instead of source *)
+ $(warning * THIS IS DEPRECATED, AND WILL BE DISCONTINUED *)
+ $(warning * Please configure your device to download the kernel *)
+ $(warning * source repository to $(KERNEL_SRC))
+ $(warning * See http://wiki.cyanogenmod.org/w/Doc:_integrated_kernel_building)
+ $(warning * for more information *)
+ $(warning ***************************************************************)
+ FULL_KERNEL_BUILD := false
+ KERNEL_BIN := $(TARGET_PREBUILT_KERNEL)
+ else
+ $(warning ***************************************************************)
+ $(warning * *)
+ $(warning * No kernel source found, and no fallback prebuilt defined. *)
+ $(warning * Please make sure your device is properly configured to *)
+ $(warning * download the kernel repository to $(KERNEL_SRC))
+ $(warning * and add the TARGET_KERNEL_CONFIG variable to BoardConfig.mk *)
+ $(warning * *)
+ $(warning * As an alternative, define the TARGET_PREBUILT_KERNEL *)
+ $(warning * variable with the path to the prebuilt binary kernel image *)
+ $(warning * in your BoardConfig.mk file *)
+ $(warning * *)
+ $(warning ***************************************************************)
+ $(error "NO KERNEL")
+ endif
+else
+ NEEDS_KERNEL_COPY := true
+ ifeq ($(TARGET_KERNEL_CONFIG),)
+ $(warning **********************************************************)
+ $(warning * Kernel source found, but no configuration was defined *)
+ $(warning * Please add the TARGET_KERNEL_CONFIG variable to your *)
+ $(warning * BoardConfig.mk file *)
+ $(warning **********************************************************)
+ # $(error "NO KERNEL CONFIG")
+ else
+ #$(info Kernel source found, building it)
+ FULL_KERNEL_BUILD := true
+ KERNEL_BIN := $(TARGET_PREBUILT_INT_KERNEL)
+ endif
+endif
+
+ifeq ($(FULL_KERNEL_BUILD),true)
+
+KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr
+KERNEL_HEADERS_INSTALL_STAMP := $(KERNEL_OUT)/.headers_install_stamp
+
+ifeq ($(NEED_KERNEL_MODULE_ROOT),true)
+KERNEL_MODULES_INSTALL := root
+KERNEL_MODULES_OUT := $(TARGET_ROOT_OUT)/lib/modules
+else
+KERNEL_MODULES_INSTALL := system
+KERNEL_MODULES_OUT := $(TARGET_OUT)/lib/modules
+endif
+
+TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX))
+ifneq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),)
+KERNEL_TOOLCHAIN_PREFIX ?= $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)
+else ifeq ($(TARGET_ARCH),arm64)
+KERNEL_TOOLCHAIN_PREFIX ?= aarch64-linux-android-
+else ifeq ($(TARGET_ARCH),arm)
+KERNEL_TOOLCHAIN_PREFIX ?= arm-linux-androideabi-
+else ifeq ($(TARGET_ARCH),x86)
+KERNEL_TOOLCHAIN_PREFIX ?= x86_64-linux-android-
+endif
+
+ifeq ($(KERNEL_TOOLCHAIN),)
+KERNEL_TOOLCHAIN_PATH := $(KERNEL_TOOLCHAIN_PREFIX)
+else
+ifneq ($(KERNEL_TOOLCHAIN_PREFIX),)
+KERNEL_TOOLCHAIN_PATH := $(KERNEL_TOOLCHAIN)/$(KERNEL_TOOLCHAIN_PREFIX)
+endif
+endif
+
+ifneq ($(USE_CCACHE),)
+ ccache := $(ANDROID_BUILD_TOP)/prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache
+ # Check that the executable is here.
+ ccache := $(strip $(wildcard $(ccache)))
+endif
+
+KERNEL_CROSS_COMPILE := CROSS_COMPILE="$(ccache) $(KERNEL_TOOLCHAIN_PATH)"
+ccache =
+
+define mv-modules
+ mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
+ if [ "$$mdpath" != "" ];then\
+ mpath=`dirname $$mdpath`;\
+ ko=`find $$mpath/kernel -type f -name *.ko`;\
+ for i in $$ko; do $(KERNEL_TOOLCHAIN_PATH)strip --strip-unneeded $$i;\
+ mv $$i $(KERNEL_MODULES_OUT)/; done;\
+ fi
+endef
+
+define clean-module-folder
+ mdpath=`find $(KERNEL_MODULES_OUT) -type f -name modules.order`;\
+ if [ "$$mdpath" != "" ];then\
+ mpath=`dirname $$mdpath`; rm -rf $$mpath;\
+ fi
+endef
+
+ifeq ($(HOST_OS),darwin)
+ MAKE_FLAGS += C_INCLUDE_PATH=$(ANDROID_BUILD_TOP)/external/elfutils/libelf/
+endif
+
+ifeq ($(TARGET_KERNEL_MODULES),)
+ TARGET_KERNEL_MODULES := no-external-modules
+endif
+
+$(KERNEL_OUT_STAMP):
+ $(hide) mkdir -p $(KERNEL_OUT)
+ $(hide) rm -rf $(KERNEL_MODULES_OUT)
+ $(hide) mkdir -p $(KERNEL_MODULES_OUT)
+ $(hide) touch $@
+
+KERNEL_ADDITIONAL_CONFIG_OUT := $(KERNEL_OUT)/.additional_config
+
+.PHONY: force_additional_config
+$(KERNEL_ADDITIONAL_CONFIG_OUT): force_additional_config
+ $(hide) cmp -s $(KERNEL_ADDITIONAL_CONFIG_SRC) $@ || cp $(KERNEL_ADDITIONAL_CONFIG_SRC) $@;
+
+$(KERNEL_CONFIG): $(KERNEL_OUT_STAMP) $(KERNEL_DEFCONFIG_SRC) $(KERNEL_ADDITIONAL_CONFIG_OUT)
+ @echo "Building Kernel Config"
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(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 $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) oldconfig; fi
+ $(hide) if [ ! -z "$(KERNEL_ADDITIONAL_CONFIG)" ]; then \
+ echo "Using additional config '$(KERNEL_ADDITIONAL_CONFIG)'"; \
+ $(KERNEL_SRC)/scripts/kconfig/merge_config.sh -m -O $(KERNEL_OUT) $(KERNEL_OUT)/.config $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG); \
+ $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) KCONFIG_ALLCONFIG=$(KERNEL_OUT)/.config alldefconfig; fi
+
+TARGET_KERNEL_BINARIES: $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL_STAMP)
+ @echo "Building Kernel"
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(TARGET_PREBUILT_INT_KERNEL_TYPE)
+ $(hide) if grep -q 'CONFIG_OF=y' $(KERNEL_CONFIG) ; \
+ then \
+ echo "Building DTBs" ; \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) dtbs ; \
+ else \
+ echo "DTBs not enabled" ; \
+ fi ;
+ $(hide) if grep -q 'CONFIG_MODULES=y' $(KERNEL_CONFIG) ; \
+ then \
+ echo "Building Kernel Modules" ; \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) modules && \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) INSTALL_MOD_PATH=../../$(KERNEL_MODULES_INSTALL) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) modules_install && \
+ $(mv-modules) && \
+ $(clean-module-folder) ; \
+ else \
+ echo "Kernel Modules not enabled" ; \
+ fi ;
+
+
+$(TARGET_KERNEL_MODULES): TARGET_KERNEL_BINARIES
+
+$(TARGET_PREBUILT_INT_KERNEL): $(TARGET_KERNEL_MODULES)
+ $(mv-modules)
+ $(clean-module-folder)
+
+$(KERNEL_HEADERS_INSTALL_STAMP): $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG)
+ @echo "Building Kernel Headers"
+ $(hide) if [ ! -z "$(KERNEL_HEADER_DEFCONFIG)" ]; then \
+ rm -f ../$(KERNEL_CONFIG); \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(KERNEL_HEADER_DEFCONFIG); \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_HEADER_ARCH) $(KERNEL_CROSS_COMPILE) headers_install; fi
+ $(hide) if [ "$(KERNEL_HEADER_DEFCONFIG)" != "$(KERNEL_DEFCONFIG)" ]; then \
+ echo "Used a different defconfig for header generation"; \
+ rm -f ../$(KERNEL_CONFIG); \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) VARIANT_DEFCONFIG=$(VARIANT_DEFCONFIG) SELINUX_DEFCONFIG=$(SELINUX_DEFCONFIG) $(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) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) oldconfig; fi
+ $(hide) if [ ! -z "$(KERNEL_ADDITIONAL_CONFIG)" ]; then \
+ echo "Using additional config '$(KERNEL_ADDITIONAL_CONFIG)'"; \
+ $(KERNEL_SRC)/scripts/kconfig/merge_config.sh -m -O $(KERNEL_OUT) $(KERNEL_OUT)/.config $(KERNEL_SRC)/arch/$(KERNEL_ARCH)/configs/$(KERNEL_ADDITIONAL_CONFIG); \
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) KCONFIG_ALLCONFIG=$(KERNEL_OUT)/.config alldefconfig; fi
+ $(hide) touch $@
+
+# provide this rule because there are dependencies on this throughout the repo
+$(KERNEL_HEADERS_INSTALL): $(KERNEL_HEADERS_INSTALL_STAMP)
+
+kerneltags: $(KERNEL_OUT_STAMP) $(KERNEL_CONFIG)
+ $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) tags
+
+kernelconfig: KERNELCONFIG_MODE := menuconfig
+kernelxconfig: KERNELCONFIG_MODE := xconfig
+kernelxconfig kernelconfig: $(KERNEL_OUT_STAMP)
+ $(MAKE) $(MAKE_FLAGS) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNEL_DEFCONFIG)
+ env KCONFIG_NOTIMESTAMP=true \
+ $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) $(KERNELCONFIG_MODE)
+ env KCONFIG_NOTIMESTAMP=true \
+ $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) savedefconfig
+ cp $(KERNEL_OUT)/defconfig $(KERNEL_DEFCONFIG_SRC)
+
+alldefconfig: $(KERNEL_OUT_STAMP)
+ env KCONFIG_NOTIMESTAMP=true \
+ $(MAKE) -C $(KERNEL_SRC) O=$(KERNEL_OUT) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) alldefconfig
+
+endif # FULL_KERNEL_BUILD
+
+## Install it
+
+ifeq ($(NEEDS_KERNEL_COPY),true)
+file := $(INSTALLED_KERNEL_TARGET)
+ALL_PREBUILT += $(file)
+$(file) : $(KERNEL_BIN) | $(ACP)
+ $(transform-prebuilt-to-target)
+
+ALL_PREBUILT += $(INSTALLED_KERNEL_TARGET)
+endif
+
+.PHONY: kernel
+kernel: $(INSTALLED_KERNEL_TARGET)