#
# Copyright (C) 2009-2011 The Android-x86 Open Source 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
#

ifneq ($(TARGET_BUILD_VARIANT), user)
KERNEL_DEFCONFIG ?= $(strip $(TARGET_DEVICE))_debug_defconfig
else
KERNEL_DEFCONFIG ?= $(strip $(TARGET_DEVICE))_defconfig
endif

KERNEL_DIR := $(call my-dir)
ROOTDIR := $(abspath $(TOP))

KERNEL_OUT := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ
TARGET_PREBUILT_KERNEL := $(KERNEL_OUT)/arch/arm/boot/zImage
TARGET_KERNEL_CONFIG := $(KERNEL_OUT)/.config
KERNEL_HEADERS_INSTALL := $(KERNEL_OUT)/usr

ifeq ($(INSTALLED_KERNEL_TARGET),)
INSTALLED_KERNEL_TARGET := $(PRODUCT_OUT)/kernel
endif

ifeq ($(KERNEL_CROSS_COMPILE),)
KERNEL_CROSS_COMPILE := arm-eabi-
endif

$(KERNEL_OUT):
	mkdir -p $@

.PHONY: kernel kernel-defconfig kernel-menuconfig clean-kernel
kernel-menuconfig: | $(KERNEL_OUT)
	$(MAKE) -C $(KERNEL_DIR) O=$(ROOTDIR)/$(KERNEL_OUT) ARCH=arm CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) menuconfig

kernel-savedefconfig: | $(KERNEL_OUT)
	cp $(TARGET_KERNEL_CONFIG) $(KERNEL_DIR)/arch/arm/configs/$(KERNEL_DEFCONFIG)

$(TARGET_PREBUILT_KERNEL): kernel

$(TARGET_KERNEL_CONFIG) kernel-defconfig: $(KERNEL_DIR)/arch/arm/configs/$(KERNEL_DEFCONFIG) | $(KERNEL_OUT)
	$(MAKE) -C $(KERNEL_DIR) O=$(ROOTDIR)/$(KERNEL_OUT) ARCH=arm CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) $(KERNEL_DEFCONFIG)
	$(MAKE) -C $(KERNEL_DIR) O=$(ROOTDIR)/$(KERNEL_OUT) ARCH=arm CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) oldconfig

$(KERNEL_HEADERS_INSTALL): $(TARGET_KERNEL_CONFIG) | $(KERNEL_OUT)
	$(MAKE) -C $(KERNEL_DIR) O=$(ROOTDIR)/$(KERNEL_OUT) ARCH=arm CROSS_COMPILE=$(KERNEL_CROSS_COMPILE) headers_install

kernel: $(TARGET_KERNEL_CONFIG) $(KERNEL_HEADERS_INSTALL) | $(KERNEL_OUT)
	$(MAKE) -C $(KERNEL_DIR) O=$(ROOTDIR)/$(KERNEL_OUT) ARCH=arm CROSS_COMPILE=$(KERNEL_CROSS_COMPILE)

$(INSTALLED_KERNEL_TARGET): kernel

$(INSTALLED_KERNEL_TARGET): $(TARGET_PREBUILT_KERNEL) | $(ACP)
	$(copy-file-to-target)

clean-kernel:
	@rm -rf $(KERNEL_OUT)