1# 
2# Copyright (C) 2006-2007 OpenWrt.org
3#
4# This is free software, licensed under the GNU General Public License v2.
5# See /LICENSE for more information.
6#
7
8KERNELNAME=
9ifneq (,$(findstring x86,$(BOARD)))
10  KERNELNAME="bzImage"
11endif
12ifneq (,$(findstring rdc,$(BOARD)))
13  KERNELNAME="bzImage"
14endif
15ifneq (,$(findstring ppc,$(BOARD)))
16  KERNELNAME="uImage"
17endif
18ifneq (,$(findstring avr32,$(BOARD)))
19  KERNELNAME="uImage"
20endif
21
22KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
23	CROSS_COMPILE="$(KERNEL_CROSS)" \
24	ARCH="$(LINUX_KARCH)" \
25	KBUILD_HAVE_NLS=no \
26	CONFIG_SHELL="$(BASH)"
27
28INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
29
30ifneq (,$(KERNEL_CC))
31  KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
32endif
33
34# defined in quilt.mk
35Kernel/Patch:=$(Kernel/Patch/Default)
36ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
37define Kernel/Prepare/Default
38	bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
39	$(Kernel/Patch)
40	$(if $(QUILT),touch $(LINUX_DIR)/.quilt_used)
41endef
42else
43define Kernel/Prepare/Default
44	mkdir -p $(KERNEL_BUILD_DIR)
45	if [ -d $(LINUX_DIR) ]; then \
46		rmdir $(LINUX_DIR); \
47	fi
48	ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
49endef
50endif
51
52define Kernel/Configure/2.4
53	$(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
54	$(MAKE) $(KERNEL_MAKEOPTS) oldconfig include/linux/compile.h include/linux/version.h
55	$(MAKE) $(KERNEL_MAKEOPTS) dep
56endef
57define Kernel/Configure/2.6
58	-$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
59endef
60define Kernel/Configure/Default
61	$(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target
62	$(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
63	$(SCRIPT_DIR)/kconfig.pl 'm+' $(LINUX_DIR)/.config.target $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
64	$(call Kernel/Configure/$(KERNEL))
65	rm -rf $(KERNEL_BUILD_DIR)/modules
66endef
67
68define Kernel/CompileModules/Default
69	rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
70	$(MAKE) $(KERNEL_MAKEOPTS) modules
71endef
72
73ifeq ($(KERNEL),2.6)
74  ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
75    define Kernel/SetInitramfs
76		mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
77		grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
78		echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
79		echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
80		echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
81    endef
82  else
83    define Kernel/SetInitramfs
84		mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
85		grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
86		rm -f $(TARGET_DIR)/init
87		echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
88    endef
89  endif
90endif
91define Kernel/CompileImage/Default
92	$(call Kernel/SetInitramfs)
93	$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
94	$(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
95	$(KERNEL_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
96endef
97
98define Kernel/Clean/Default
99	rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
100	rm -f $(LINUX_KERNEL)
101	$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
102endef
103
104
105