2 # Copyright (C) 2014 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 ($(KBUILD_OUTPUT),)
12 ifeq ($(TARGET_PREBUILT_KERNEL),)
16 ifneq ($(filter x86%,$(TARGET_ARCH)),)
17 TARGET_KERNEL_ARCH ?= $(TARGET_ARCH)
18 KERNEL_TARGET := bzImage
19 TARGET_KERNEL_CONFIG ?= android-$(TARGET_KERNEL_ARCH)_defconfig
20 KERNEL_CONFIG_DIR := arch/x86/configs
22 ifeq ($(TARGET_ARCH),arm)
23 KERNEL_TARGET := zImage
24 TARGET_KERNEL_CONFIG ?= goldfish_defconfig
25 KERNEL_CONFIG_DIR := arch/arm/configs
28 KBUILD_OUTPUT := $(abspath $(TARGET_OUT_INTERMEDIATES)/kernel)
29 mk_kernel := + $(hide) $(MAKE) -C $(KERNEL_DIR) O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) $(if $(SHOW_COMMANDS),V=1)
31 KERNEL_CONFIG_FILE := $(if $(wildcard $(TARGET_KERNEL_CONFIG)),$(TARGET_KERNEL_CONFIG),$(KERNEL_DIR)/$(KERNEL_CONFIG_DIR)/$(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_ARCH_CHANGED := $(if $(filter 0,$(shell grep -s ^$(if $(filter x86,$(TARGET_KERNEL_ARCH)),\#.)CONFIG_64BIT $(KERNEL_DOTCONFIG_FILE) | wc -l)),FORCE)
41 $(KERNEL_DOTCONFIG_FILE): $(KERNEL_CONFIG_FILE) $(KERNEL_ARCH_CHANGED) | $(ACP)
42 $(copy-file-to-new-target)
44 # bison is needed to build kernel and external modules from source
45 BISON := $(HOST_OUT_EXECUTABLES)/bison$(HOST_EXECUTABLE_SUFFIX)
47 BUILT_KERNEL_TARGET := $(KBUILD_OUTPUT)/arch/$(TARGET_ARCH)/boot/$(KERNEL_TARGET)
48 $(INSTALLED_KERNEL_TARGET): $(KERNEL_DOTCONFIG_FILE) $(BISON)
49 $(mk_kernel) oldnoconfig
50 $(mk_kernel) $(KERNEL_TARGET) $(if $(MOD_ENABLED),modules)
51 $(hide) $(ACP) -fp $(BUILT_KERNEL_TARGET) $@
52 $(if $(FIRMWARE_ENABLED),$(mk_kernel) INSTALL_MOD_PATH=$(abspath $(TARGET_OUT)) firmware_install)
54 ifneq ($(MOD_ENABLED),)
55 KERNEL_MODULES_DEP := $(firstword $(wildcard $(TARGET_OUT)/lib/modules/*/modules.dep))
56 KERNEL_MODULES_DEP := $(if $(KERNEL_MODULES_DEP),$(KERNEL_MODULES_DEP),$(TARGET_OUT)/lib/modules)
58 $(TARGET_OUT_INTERMEDIATES)/%.kmodule: $(INSTALLED_KERNEL_TARGET)
59 $(hide) cp -an $(EXTRA_KERNEL_MODULE_PATH_$*) $(TARGET_OUT_INTERMEDIATES)/$*.kmodule
60 @echo Building additional kernel module $*
61 $(mk_kernel) M=$(abspath $@) modules
63 $(KERNEL_MODULES_DEP): $(INSTALLED_KERNEL_TARGET) $(patsubst %,$(TARGET_OUT_INTERMEDIATES)/%.kmodule,$(TARGET_EXTRA_KERNEL_MODULES))
64 $(hide) rm -rf $(TARGET_OUT)/lib/modules
65 $(mk_kernel) INSTALL_MOD_PATH=$(abspath $(TARGET_OUT)) modules_install
66 + $(hide) for kmod in $(TARGET_EXTRA_KERNEL_MODULES) ; do \
67 echo Installing additional kernel module $${kmod} ; \
68 $(subst +,,$(subst $(hide),,$(mk_kernel))) INSTALL_MOD_PATH=$(abspath $(TARGET_OUT)) M=$(abspath $(TARGET_OUT_INTERMEDIATES))/$${kmod}.kmodule modules_install ; \
70 $(hide) rm -f $(TARGET_OUT)/lib/modules/*/{build,source}
73 $(BUILT_SYSTEMIMAGE): $(KERNEL_MODULES_DEP)
75 # rules to get source of Broadcom 802.11a/b/g/n hybrid device driver
76 # based on broadcomsetup.sh of Kyle Evans
77 WL_PATH := $(KERNEL_DIR)/drivers/net/wireless/wl
78 WL_ENABLED := $(if $(wildcard $(WL_PATH)),$(shell grep ^CONFIG_WL=[my] $(KERNEL_CONFIG_FILE)))
79 WL_ARCH_CHANGED := $(if $(shell file $(WL_PATH)/lib/wlc_hybrid.o_shipped | grep -s $(if $(filter x86,$(TARGET_KERNEL_ARCH)),80386,x86-64)),,FORCE)
80 ifeq ($(filter x86,$(TARGET_KERNEL_ARCH)),)
81 WL_SRC := $(WL_PATH)/hybrid-v35_64-nodebug-pcoem-6_30_223_141.tar.gz
83 WL_SRC := $(WL_PATH)/hybrid-v35-nodebug-pcoem-6_30_223_141.tar.gz
86 @echo Downloading $(@F)...
87 $(hide) curl http://www.broadcom.com/docs/linux_sta/$(@F) > $@
88 $(WL_PATH)/Makefile : $(WL_SRC) $(wildcard $(WL_PATH)/*.patch) $(WL_ARCH_CHANGED) $(KERNEL_ARCH_CHANGED)
89 $(hide) tar zxf $< -C $(@D) --overwrite && \
90 patch -p5 -d $(@D) -i wl.patch && \
91 patch -p1 -d $(@D) -i linux-recent.patch
92 $(INSTALLED_KERNEL_TARGET): $(if $(WL_ENABLED),$(WL_PATH)/Makefile)
94 installclean: FILES += $(KBUILD_OUTPUT) $(INSTALLED_KERNEL_TARGET)
96 TARGET_PREBUILT_KERNEL := $(INSTALLED_KERNEL_TARGET)
99 kernel: $(TARGET_PREBUILT_KERNEL)
103 $(INSTALLED_KERNEL_TARGET): $(TARGET_PREBUILT_KERNEL) | $(ACP)
104 $(copy-file-to-new-target)
105 ifdef TARGET_PREBUILT_MODULES
106 mkdir -p $(TARGET_OUT)/lib
107 $(hide) cp -r $(TARGET_PREBUILT_MODULES) $(TARGET_OUT)/lib
110 endif # TARGET_PREBUILT_KERNEL
111 endif # KBUILD_OUTPUT