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         if [ -d $(GENERIC_PLATFORM_DIR)/patches ]; then $(PATCH) $(LINUX_DIR) $(GENERIC_PLATFORM_DIR)/patches; fi
  73         if [ -d ./files ]; then $(CP) ./files/* $(LINUX_DIR)/; fi
  74         if [ -d ./patches ]; then $(PATCH) $(LINUX_DIR) ./patches; fi
  75 endef
  76 define Kernel/Prepare
  77         $(call Kernel/Prepare/Default)
  78 endef
  79
  80 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  81         CROSS_COMPILE="$(KERNEL_CROSS)" \
  82         ARCH="$(LINUX_KARCH)" \
  83         CONFIG_SHELL="$(BASH)"
  84
  85 define Kernel/Configure/2.4
  86         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  87         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig include/linux/compile.h include/linux/version.h
  88         $(MAKE) $(KERNEL_MAKEOPTS) dep
  89 endef
  90 define Kernel/Configure/2.6
  91         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig prepare scripts
  92 endef
  93 define Kernel/Configure/Default
  94         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  95         $(call Kernel/Configure/$(KERNEL))
  96 endef
  97 define Kernel/Configure
  98         $(call Kernel/Configure/Default)
  99 endef
 100
 101
 102 define Kernel/CompileModules/Default
 103         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" modules
 104         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
 105 endef
 106 define Kernel/CompileModules
 107         $(call Kernel/CompileModules/Default)
 108 endef
 109
 110
 111 ifeq ($(KERNEL),2.6)
 112   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 113     define Kernel/SetInitramfs
 114                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 115                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 116                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 117                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 118                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 119                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 120                 $(CP) $(GENERIC_PLATFORM_DIR)/files/init $(BUILD_DIR)/root/
 121     endef
 122   else
 123     define Kernel/SetInitramfs
 124                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 125                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 126                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 127                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 128     endef
 129   endif
 130 endif
 131 define Kernel/CompileImage/Default
 132         $(call Kernel/SetInitramfs)
 133         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" $(KERNELNAME)
 134         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 135 endef
 136 define Kernel/CompileImage
 137         $(call Kernel/CompileImage/Default)
 138 endef
 139
 140 define Kernel/Clean/Default
 141         rm -f $(LINUX_DIR)/.linux-compile
 142         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 143         rm -f $(LINUX_KERNEL)
 144         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 145 endef
 146
 147 define Kernel/Clean
 148         $(call Kernel/Clean/Default)
 149 endef
 150
 151 define BuildKernel
 152   ifneq ($(LINUX_SITE),)
 153     $(DL_DIR)/$(LINUX_SOURCE):
 154                 -mkdir -p $(DL_DIR)
 155                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 156   endif
 157
 158   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 159         -rm -rf $(KERNEL_BUILD_DIR)
 160         -mkdir -p $(KERNEL_BUILD_DIR)
 161         $(call Kernel/Prepare)
 162         touch $$@
 163
 164   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 165         $(call Kernel/Configure)
 166         touch $$@
 167
 168   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 169         rm -rf $(KERNEL_BUILD_DIR)/modules
 170         @rm -f $(BUILD_DIR)/linux
 171         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 172         $(call Kernel/CompileModules)
 173         touch $$@
 174
 175   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 176         $(call Kernel/CompileImage)
 177         touch $$@
 178
 179   mostlyclean: FORCE
 180         $(call Kernel/Clean)
 181
 182   ifeq ($(DUMP),1)
 183     dumpinfo:
 184                 @echo 'Target: $(BOARD)-$(KERNEL)'
 185                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 186                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 187                 @echo 'Target-Arch: $(ARCH)'
 188                 @echo 'Target-Features: $(FEATURES)'
 189                 @echo 'Linux-Version: $(LINUX_VERSION)'
 190                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 191                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 192                 @echo 'Target-Description:'
 193                 @getvar $(call shvar,Target/Description)
 194                 @echo '@@'
 195                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 196     ifneq ($(DUMPINFO),)
 197                 @$(DUMPINFO)
 198     endif
 199   endif
 200
 201   define BuildKernel
 202   endef
 203 endef
 204
 205 define Profile/Default
 206   NAME:=
 207   PACKAGES:=
 208 endef
 209
 210 define Profile
 211   $(eval $(call Profile/Default))
 212   $(eval $(call Profile/$(1)))
 213   $(eval $(call shexport,Profile/$(1)/Description))
 214   DUMPINFO += \
 215         echo "Target-Profile: $(1)"; \
 216         echo "Target-Profile-Name: $(NAME)"; \
 217         echo "Target-Profile-Packages: $(PACKAGES)"; \
 218         echo "Target-Profile-Description:"; \
 219         getvar "$(call shvar,Profile/$(1)/Description)"; \
 220         echo "@@"; \
 221         echo;
 222 endef
 223
 224 $(eval $(call shexport,Target/Description))
 225
 226 download: $(DL_DIR)/$(LINUX_SOURCE)
 227 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 228 compile: $(LINUX_DIR)/.modules
 229 install: $(LINUX_DIR)/.image
 230
 231 clean: FORCE
 232         rm -f $(STAMP_DIR)/.linux-compile
 233         rm -rf $(KERNEL_BUILD_DIR)
 234
 235 rebuild: FORCE
 236         @$(MAKE) mostlyclean
 237         @if [ -f $(LINUX_KERNEL) ]; then \
 238                 $(MAKE) clean; \
 239         fi
 240         @$(MAKE) compile
 241
 242