android: add Android.mk to build android-x86 kernel and modules

We moved the old build/core/kernel.mk to be a normal Android.mk here.
It prevents the build system from finding Android.mk in subdirectories
of kernel/.

diff --git a/Android.mk b/Android.mk
new file mode 100644 (file)
index 0000000..f8af84c
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,90 @@
+#
+# 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
+#
+
+ifeq ($(TARGET_PREBUILT_KERNEL),)
+
+KERNEL_DIR ?= $(call my-dir)
+
+ifeq ($(TARGET_ARCH),x86)
+KERNEL_TARGET := bzImage
+TARGET_KERNEL_CONFIG ?= android-x86_defconfig
+endif
+ifeq ($(TARGET_ARCH),arm)
+KERNEL_TARGET := zImage
+TARGET_KERNEL_CONFIG ?= goldfish_defconfig
+endif
+
+KBUILD_OUTPUT := $(CURDIR)/$(TARGET_OUT_INTERMEDIATES)/kernel
+mk_kernel := + $(hide) $(MAKE) -C $(KERNEL_DIR) O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) $(if $(SHOW_COMMANDS),V=1)
+ifneq ($(TARGET_ARCH),$(HOST_ARCH))
+mk_kernel += CROSS_COMPILE=$(CURDIR)/$(TARGET_TOOLS_PREFIX)
+endif
+
+KERNEL_CONFIG_FILE := $(if $(wildcard $(TARGET_KERNEL_CONFIG)),$(TARGET_KERNEL_CONFIG),$(KERNEL_DIR)/arch/$(TARGET_ARCH)/configs/$(TARGET_KERNEL_CONFIG))
+
+MOD_ENABLED := $(shell grep ^CONFIG_MODULES=y $(KERNEL_CONFIG_FILE))
+FIRMWARE_ENABLED := $(shell grep ^CONFIG_FIRMWARE_IN_KERNEL=y $(KERNEL_CONFIG_FILE))
+
+# I understand Android build system discourage to use submake,
+# but I don't want to write a complex Android.mk to build kernel.
+# This is the simplest way I can think.
+KERNEL_DOTCONFIG_FILE := $(KBUILD_OUTPUT)/.config
+$(KERNEL_DOTCONFIG_FILE): $(KERNEL_CONFIG_FILE) | $(ACP)
+       $(copy-file-to-new-target)
+
+BUILT_KERNEL_TARGET := $(KBUILD_OUTPUT)/arch/$(TARGET_ARCH)/boot/$(KERNEL_TARGET)
+$(INSTALLED_KERNEL_TARGET): $(KERNEL_DOTCONFIG_FILE)
+       $(mk_kernel) oldnoconfig
+       $(mk_kernel) $(KERNEL_TARGET) $(if $(MOD_ENABLED),modules)
+       $(hide) $(ACP) -fp $(BUILT_KERNEL_TARGET) $@
+       $(if $(FIRMWARE_ENABLED),$(mk_kernel) INSTALL_MOD_PATH=$(CURDIR)/$(TARGET_OUT) firmware_install)
+
+ifneq ($(MOD_ENABLED),)
+ifeq ($(wildcard $(INSTALLED_KERNEL_TARGET)),)
+KERNEL_MODULES_DEP := $(TARGET_OUT)/lib/modules
+else
+KERNELRELEASE := $(shell $(MAKE) -sC $(KERNEL_DIR) O=$(KBUILD_OUTPUT) ARCH=$(TARGET_ARCH) kernelrelease)
+KERNEL_MODULES_DEP := $(TARGET_OUT)/lib/modules/$(KERNELRELEASE)/modules.dep
+endif
+$(KERNEL_MODULES_DEP): $(INSTALLED_KERNEL_TARGET)
+       $(hide) rm -rf $(TARGET_OUT)/lib/modules
+       $(mk_kernel) INSTALL_MOD_PATH=$(CURDIR)/$(TARGET_OUT) modules_install
+       $(hide) rm -f $(TARGET_OUT)/lib/modules/*/{build,source}
+endif
+
+# rules to get source of Broadcom 802.11a/b/g/n hybrid device driver
+# based on broadcomsetup.sh of Kyle Evans
+WL_ENABLED := $(shell grep ^CONFIG_WL=[my] $(KERNEL_CONFIG_FILE))
+WL_PATH := drivers/net/wireless/wl
+WL_SRC := $(KERNEL_DIR)/$(WL_PATH)/hybrid-portsrc_x86_32-v5_100_82_112.tar.gz
+$(WL_SRC):
+       @echo Downloading $(@F)...
+       $(hide) curl http://www.broadcom.com/docs/linux_sta/$(@F) > $@ && tar zxf $@ -C $(@D) --overwrite && (cd $(KERNEL_DIR); git checkout $(WL_PATH)) && \
+               sed -i '/<linux\/wireless.h>/ a#include <linux/semaphore.h>' $(@D)/src/wl/sys/wl_iw.h && \
+               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/' $(@D)/src/wl/sys/wl_linux.c
+$(INSTALLED_KERNEL_TARGET): $(if $(WL_ENABLED),$(WL_SRC))
+
+installclean: FILES += $(KBUILD_OUTPUT) $(INSTALLED_KERNEL_TARGET)
+
+TARGET_PREBUILT_KERNEL := $(INSTALLED_KERNEL_TARGET)
+
+.PHONY: kernel
+kernel: $(TARGET_PREBUILT_KERNEL)
+
+else
+
+$(INSTALLED_KERNEL_TARGET): $(TARGET_PREBUILT_KERNEL) | $(ACP)
+       $(copy-file-to-new-target)
+ifdef TARGET_PREBUILT_MODULES
+       mkdir -p $(TARGET_OUT)/lib
+       $(hide) cp -r $(TARGET_PREBUILT_MODULES) $(TARGET_OUT)/lib
+endif
+
+endif # TARGET_PREBUILT_KERNEL