2 # Copyright (C) 2009 The Android-x86 Open Source Project
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at
8 # http://www.apache.org/licenses/LICENSE-2.0
11 ifeq ($(TARGET_PREBUILT_KERNEL),)
13 ifeq ($(TARGET_ARCH),x86)
14 KERNEL_TARGET := bzImage
15 TARGET_KERNEL_CONFIG ?= android-x86_defconfig
17 ifeq ($(TARGET_ARCH),arm)
18 KERNEL_TARGET := zImage
19 TARGET_KERNEL_CONFIG ?= goldfish_defconfig
22 KBUILD_OUTPUT := $(CURDIR)/$(TARGET_OUT_INTERMEDIATES)/kernel
23 mk_kernel := + $(hide) $(MAKE) -C kernel O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) $(if $(SHOW_COMMANDS),V=1)
24 ifneq ($(TARGET_ARCH),$(HOST_ARCH))
25 mk_kernel += CROSS_COMPILE=$(CURDIR)/$(TARGET_TOOLS_PREFIX)
28 ifneq ($(wildcard $(TARGET_KERNEL_CONFIG)),)
29 KERNEL_CONFIG_FILE := $(TARGET_KERNEL_CONFIG)
31 KERNEL_CONFIG_FILE := kernel/arch/$(TARGET_ARCH)/configs/$(TARGET_KERNEL_CONFIG)
33 MOD_ENABLED := $(shell grep ^CONFIG_MODULES=y $(KERNEL_CONFIG_FILE))
34 FIRMWARE_ENABLED := $(shell grep ^CONFIG_FIRMWARE_IN_KERNEL=y $(KERNEL_CONFIG_FILE))
36 # I understand Android build system discourage to use submake,
37 # but I don't want to write a complex Android.mk to build kernel.
38 # This is the simplest way I can think.
39 KERNEL_DOTCONFIG_FILE := $(KBUILD_OUTPUT)/.config
40 $(KERNEL_DOTCONFIG_FILE): $(KERNEL_CONFIG_FILE) | $(ACP)
41 $(copy-file-to-new-target)
43 BUILT_KERNEL_TARGET := $(KBUILD_OUTPUT)/arch/$(TARGET_ARCH)/boot/$(KERNEL_TARGET)
44 $(INSTALLED_KERNEL_TARGET): $(KERNEL_DOTCONFIG_FILE)
45 $(mk_kernel) oldnoconfig
46 $(mk_kernel) $(KERNEL_TARGET) $(if $(MOD_ENABLED),modules)
47 $(hide) $(ACP) -fp $(BUILT_KERNEL_TARGET) $@
48 ifdef TARGET_PREBUILT_MODULES
49 $(hide) $(ACP) -r $(TARGET_PREBUILT_MODULES) $(TARGET_OUT)/lib
51 $(hide) rm -rf $(TARGET_OUT)/lib/modules
52 $(if $(MOD_ENABLED),$(mk_kernel) INSTALL_MOD_PATH=$(CURDIR)/$(TARGET_OUT) modules_install)
53 $(hide) rm -f $(TARGET_OUT)/lib/modules/*/{build,source}
55 $(if $(FIRMWARE_ENABLED),$(mk_kernel) INSTALL_MOD_PATH=$(CURDIR)/$(TARGET_OUT) firmware_install)
57 # rules to get source of Broadcom 802.11a/b/g/n hybrid device driver
58 # based on broadcomsetup.sh of Kyle Evans
59 WL_ENABLED := $(shell grep ^CONFIG_WL=[my] $(KERNEL_CONFIG_FILE))
60 WL_PATH := drivers/net/wireless/wl
61 WL_SRC := kernel/$(WL_PATH)/hybrid-portsrc_x86_32-v5_100_82_112.tar.gz
63 @echo Downloading $(@F)...
64 $(hide) curl http://www.broadcom.com/docs/linux_sta/$(@F) > $@ && tar zxf $@ -C $(@D) --overwrite && (cd kernel; git checkout $(WL_PATH)) && \
65 sed -i '/<linux\/wireless.h>/ a#include <linux/semaphore.h>' $(@D)/src/wl/sys/wl_iw.h && \
66 sed -i 's/init_MUTEX(&wl->sem)/\n#ifndef init_MUTEX\nsema_init(\&wl->sem,1)\n#else\ninit_MUTEX(\&wl->sem)\n#endif\n/' $(@D)/src/wl/sys/wl_linux.c
67 $(INSTALLED_KERNEL_TARGET): $(if $(WL_ENABLED),$(WL_SRC))
69 installclean: FILES += $(KBUILD_OUTPUT) $(INSTALLED_KERNEL_TARGET)
71 TARGET_PREBUILT_KERNEL := $(INSTALLED_KERNEL_TARGET)
74 kernel: $(TARGET_PREBUILT_KERNEL)
78 $(INSTALLED_KERNEL_TARGET): $(TARGET_PREBUILT_KERNEL) | $(ACP)
79 $(copy-file-to-new-target)
81 endif # TARGET_PREBUILT_KERNEL