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 $(INCLUDE_DIR)/prereq.mk
  10
  11 -include ./config
  12 ifneq ($(CONFIG_ATM),)
  13   FEATURES += atm
  14 endif
  15 ifneq ($(CONFIG_PCI),)
  16   FEATURES += pci
  17 endif
  18 ifneq ($(CONFIG_USB),)
  19   FEATURES += usb
  20 endif
  21 ifneq ($(CONFIG_PCMCIA),)
  22   FEATURES += pcmcia
  23 endif
  24 ifneq ($(CONFIG_VIDEO_DEV),)
  25   FEATURES += video
  26 endif
  27
  28 # remove duplicates
  29 FEATURES:=$(sort $(FEATURES))
  30
  31 # For target profile selection - the default set
  32 DEFAULT_PACKAGES:=base-files libgcc uclibc bridge busybox dnsmasq dropbear iptables mtd ppp ppp-mod-pppoe mtd kmod-ipt-nathelper
  33
  34 ifeq ($(DUMP),1)
  35   all: dumpinfo
  36 else
  37   all: compile
  38 endif
  39
  40 include $(INCLUDE_DIR)/kernel-version.mk
  41 include $(INCLUDE_DIR)/host.mk
  42 include $(INCLUDE_DIR)/kernel.mk
  43
  44 LINUX_CONFIG:=./config
  45
  46 ifneq (,$(findstring uml,$(BOARD)))
  47   LINUX_KARCH:=um
  48 else
  49   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  50         -e 's/mipsel/mips/' \
  51         -e 's/mipseb/mips/' \
  52         -e 's/powerpc/ppc/' \
  53         -e 's/sh[234]/sh/' \
  54         -e 's/armeb/arm/' \
  55   )
  56 endif
  57
  58 KERNELNAME=
  59 ifneq (,$(findstring x86,$(BOARD)))
  60   KERNELNAME="bzImage"
  61 endif
  62 ifneq (,$(findstring rdc,$(BOARD)))
  63   KERNELNAME="bzImage"
  64 endif
  65 ifneq (,$(findstring ppc,$(BOARD)))
  66   KERNELNAME="uImage"
  67 endif
  68
  69
  70 define Kernel/Prepare/Default
  71         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  72         [ -d $(GENERIC_PLATFORM_DIR)/patches ] && $(PATCH) $(LINUX_DIR) $(GENERIC_PLATFORM_DIR)/patches
  73         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  74 endef
  75 define Kernel/Prepare
  76         $(call Kernel/Prepare/Default)
  77 endef
  78
  79 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  80         CROSS_COMPILE="$(KERNEL_CROSS)" \
  81         ARCH="$(LINUX_KARCH)" \
  82         CONFIG_SHELL="$(BASH)"
  83
  84 define Kernel/Configure/2.4
  85         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  86         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig include/linux/compile.h include/linux/version.h
  87         $(MAKE) $(KERNEL_MAKEOPTS) dep
  88 endef
  89 define Kernel/Configure/2.6
  90         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig prepare scripts
  91 endef
  92 define Kernel/Configure/Default
  93         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  94         $(call Kernel/Configure/$(KERNEL))
  95 endef
  96 define Kernel/Configure
  97         $(call Kernel/Configure/Default)
  98 endef
  99
 100
 101 define Kernel/CompileModules/Default
 102         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" modules
 103         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
 104 endef
 105 define Kernel/CompileModules
 106         $(call Kernel/CompileModules/Default)
 107 endef
 108
 109
 110 ifeq ($(KERNEL),2.6)
 111   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 112     define Kernel/SetInitramfs
 113                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 114                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 115                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 116                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 117                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 118                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 119                 $(CP) $(GENERIC_PLATFORM_DIR)/files/init $(BUILD_DIR)/root/
 120     endef
 121   else
 122     define Kernel/SetInitramfs
 123                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 124                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 125                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 126                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 127     endef
 128   endif
 129 endif
 130 define Kernel/CompileImage/Default
 131         $(call Kernel/SetInitramfs)
 132         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" $(KERNELNAME)
 133         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 134 endef
 135 define Kernel/CompileImage
 136         $(call Kernel/CompileImage/Default)
 137 endef
 138
 139 define Kernel/Clean/Default
 140         rm -f $(LINUX_DIR)/.linux-compile
 141         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 142         rm -f $(LINUX_KERNEL)
 143         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 144 endef
 145
 146 define Kernel/Clean
 147         $(call Kernel/Clean/Default)
 148 endef
 149
 150 define BuildKernel
 151   ifneq ($(LINUX_SITE),)
 152     $(DL_DIR)/$(LINUX_SOURCE):
 153                 -mkdir -p $(DL_DIR)
 154                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 155   endif
 156
 157   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 158         -rm -rf $(KERNEL_BUILD_DIR)
 159         -mkdir -p $(KERNEL_BUILD_DIR)
 160         $(call Kernel/Prepare)
 161         touch $$@
 162
 163   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 164         $(call Kernel/Configure)
 165         touch $$@
 166
 167   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 168         rm -rf $(KERNEL_BUILD_DIR)/modules
 169         @rm -f $(BUILD_DIR)/linux
 170         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 171         $(call Kernel/CompileModules)
 172         touch $$@
 173
 174   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 175         $(call Kernel/CompileImage)
 176         touch $$@
 177
 178   mostlyclean: FORCE
 179         $(call Kernel/Clean)
 180
 181   ifeq ($(DUMP),1)
 182     dumpinfo:
 183                 @echo 'Target: $(BOARD)-$(KERNEL)'
 184                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 185                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 186                 @echo 'Target-Arch: $(ARCH)'
 187                 @echo 'Target-Features: $(FEATURES)'
 188                 @echo 'Linux-Version: $(LINUX_VERSION)'
 189                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 190                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 191                 @echo 'Target-Description:'
 192                 @getvar $(call shvar,Target/Description)
 193                 @echo '@@'
 194                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 195     ifneq ($(DUMPINFO),)
 196                 @$(DUMPINFO)
 197     endif
 198   endif
 199
 200   define BuildKernel
 201   endef
 202 endef
 203
 204 define Profile/Default
 205   NAME:=
 206   PACKAGES:=
 207 endef
 208
 209 define Profile
 210   $(eval $(call Profile/Default))
 211   $(eval $(call Profile/$(1)))
 212   $(eval $(call shexport,Profile/$(1)/Description))
 213   DUMPINFO += \
 214         echo "Target-Profile: $(1)"; \
 215         echo "Target-Profile-Name: $(NAME)"; \
 216         echo "Target-Profile-Packages: $(PACKAGES)"; \
 217         echo "Target-Profile-Description:"; \
 218         getvar "$(call shvar,Profile/$(1)/Description)"; \
 219         echo "@@"; \
 220         echo;
 221 endef
 222
 223 $(eval $(call shexport,Target/Description))
 224
 225 download: $(DL_DIR)/$(LINUX_SOURCE)
 226 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 227 compile: $(LINUX_DIR)/.modules
 228 install: $(LINUX_DIR)/.image
 229
 230 clean: FORCE
 231         rm -f $(STAMP_DIR)/.linux-compile
 232         rm -rf $(KERNEL_BUILD_DIR)
 233
 234 rebuild: FORCE
 235         @$(MAKE) mostlyclean
 236         @if [ -f $(LINUX_KERNEL) ]; then \
 237                 $(MAKE) clean; \
 238         fi
 239         @$(MAKE) compile
 240
 241