include/kernel-build.mk

   1 #
   2 # Copyright (C) 2006 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7 KERNEL_BUILD:=1
   8
   9 include $(INCLUDE_DIR)/host.mk
  10 include $(INCLUDE_DIR)/kernel.mk
  11
  12 LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
  13 LINUX_SITE:=http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
  14            http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
  15            http://www.kernel.org/pub/linux/kernel/v$(KERNEL) \
  16            http://www.de.kernel.org/pub/linux/kernel/v$(KERNEL)
  17
  18 LINUX_CONFIG:=./config
  19
  20 ifneq (,$(findstring uml,$(BOARD)))
  21   LINUX_KARCH:=um
  22 else
  23   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  24         -e 's/mipsel/mips/' \
  25         -e 's/mipseb/mips/' \
  26         -e 's/powerpc/ppc/' \
  27         -e 's/sh[234]/sh/' \
  28         -e 's/armeb/arm/' \
  29   )
  30 endif
  31
  32 KERNELNAME=
  33 ifneq (,$(findstring x86,$(BOARD)))
  34   KERNELNAME="bzImage"
  35 endif
  36 ifneq (,$(findstring ppc,$(BOARD)))
  37   KERNELNAME="uImage"
  38 endif
  39
  40
  41 define Kernel/Prepare/Default
  42         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  43         [ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches
  44         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  45 endef
  46 define Kernel/Prepare
  47         $(call Kernel/Prepare/Default)
  48 endef
  49
  50
  51 define Kernel/Configure/2.4
  52         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  53         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
  54         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
  55 endef
  56 define Kernel/Configure/2.6
  57         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
  58 endef
  59 define Kernel/Configure/Default
  60         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  61         $(call Kernel/Configure/$(KERNEL))
  62 endef
  63 define Kernel/Configure
  64         $(call Kernel/Configure/Default)
  65 endef
  66
  67
  68 define Kernel/CompileModules/Default
  69         $(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
  70         $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  71 endef
  72 define Kernel/CompileModules
  73         $(call Kernel/CompileModules/Default)
  74 endef
  75
  76
  77 ifeq ($(KERNEL),2.6)
  78   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  79     define Kernel/SetInitramfs
  80                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  81                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  82                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
  83                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
  84                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
  85                 mkdir -p $(BUILD_DIR)/root/etc/init.d
  86                 $(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
  87     endef
  88   else
  89     define Kernel/SetInitramfs
  90                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  91                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  92                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
  93                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  94     endef
  95   endif
  96 endif
  97 define Kernel/CompileImage/Default
  98         $(call Kernel/SetInitramfs)
  99         $(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
 100         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 101 endef
 102 define Kernel/CompileImage
 103         $(call Kernel/CompileImage/Default)
 104 endef
 105
 106 define Kernel/Clean/Default
 107         rm -f $(LINUX_DIR)/.linux-compile
 108         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 109         rm -f $(LINUX_KERNEL)
 110         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 111 endef
 112
 113 define Kernel/Clean
 114         $(call Kernel/Clean/Default)
 115 endef
 116
 117 define BuildKernel
 118   ifneq ($(LINUX_SITE),)
 119     $(DL_DIR)/$(LINUX_SOURCE):
 120                 -mkdir -p $(DL_DIR)
 121                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 122   endif
 123
 124   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 125         -rm -rf $(KERNEL_BUILD_DIR)
 126         -mkdir -p $(KERNEL_BUILD_DIR)
 127         $(call Kernel/Prepare)
 128         touch $$@
 129
 130   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 131         $(call Kernel/Configure)
 132         touch $$@
 133
 134   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 135         rm -rf $(KERNEL_BUILD_DIR)/modules
 136         @rm -f $(BUILD_DIR)/linux
 137         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 138         $(call Kernel/CompileModules)
 139         touch $$@
 140
 141   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 142         $(call Kernel/CompileImage)
 143         touch $$@
 144
 145   mostlyclean: FORCE
 146         $(call Kernel/Clean)
 147
 148   define BuildKernel
 149   endef
 150 endef
 151
 152
 153 download: $(DL_DIR)/$(LINUX_SOURCE)
 154 prepare: $(LINUX_DIR)/.configured $(TOPDIR)/.kernel.mk
 155 compile: $(LINUX_DIR)/.modules
 156 install: $(LINUX_DIR)/.image
 157
 158 clean: FORCE
 159         rm -f $(STAMP_DIR)/.linux-compile
 160         rm -rf $(KERNEL_BUILD_DIR)
 161
 162 rebuild: FORCE
 163         @$(MAKE) mostlyclean
 164         @if [ -f $(LINUX_KERNEL) ]; then \
 165                 $(MAKE) clean; \
 166         fi
 167         @$(MAKE) compile
 168
 169 $(TOPDIR)/.kernel.mk: Makefile
 170         echo "CONFIG_BOARD:=$(BOARD)" > $@
 171         echo "CONFIG_KERNEL:=$(KERNEL)" >> $@
 172         echo "CONFIG_LINUX_VERSION:=$(LINUX_VERSION)" >> $@
 173         echo "CONFIG_LINUX_RELEASE:=$(LINUX_RELEASE)" >> $@
 174         echo "CONFIG_LINUX_KARCH:=$(LINUX_KARCH)" >> $@
 175
 176