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 # For target profile selection - the default set
  10 DEFAULT_PACKAGES:=base-files libgcc uclibc bridge busybox dnsmasq dropbear iptables mtd ppp ppp-mod-pppoe mtd
  11
  12 ifeq ($(DUMP),1)
  13   all: dumpinfo
  14 else
  15   all: compile
  16 endif
  17 KERNEL:=2.$(word 2,$(subst ., ,$(strip $(LINUX_VERSION))))
  18
  19 include $(INCLUDE_DIR)/host.mk
  20 include $(INCLUDE_DIR)/kernel.mk
  21
  22 LINUX_CONFIG:=./config
  23
  24 ifneq (,$(findstring uml,$(BOARD)))
  25   LINUX_KARCH:=um
  26 else
  27   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  28         -e 's/mipsel/mips/' \
  29         -e 's/mipseb/mips/' \
  30         -e 's/powerpc/ppc/' \
  31         -e 's/sh[234]/sh/' \
  32         -e 's/armeb/arm/' \
  33   )
  34 endif
  35
  36 KERNELNAME=
  37 ifneq (,$(findstring x86,$(BOARD)))
  38   KERNELNAME="bzImage"
  39 endif
  40 ifneq (,$(findstring ppc,$(BOARD)))
  41   KERNELNAME="uImage"
  42 endif
  43
  44
  45 define Kernel/Prepare/Default
  46         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  47         [ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches
  48         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  49 endef
  50 define Kernel/Prepare
  51         $(call Kernel/Prepare/Default)
  52 endef
  53
  54
  55 define Kernel/Configure/2.4
  56         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  57         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
  58         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
  59 endef
  60 define Kernel/Configure/2.6
  61         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
  62 endef
  63 define Kernel/Configure/Default
  64         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  65         $(call Kernel/Configure/$(KERNEL))
  66 endef
  67 define Kernel/Configure
  68         $(call Kernel/Configure/Default)
  69 endef
  70
  71
  72 define Kernel/CompileModules/Default
  73         $(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
  74         $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  75 endef
  76 define Kernel/CompileModules
  77         $(call Kernel/CompileModules/Default)
  78 endef
  79
  80
  81 ifeq ($(KERNEL),2.6)
  82   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  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                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
  87                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
  88                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
  89                 mkdir -p $(BUILD_DIR)/root/etc/init.d
  90                 $(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
  91     endef
  92   else
  93     define Kernel/SetInitramfs
  94                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  95                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  96                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
  97                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  98     endef
  99   endif
 100 endif
 101 define Kernel/CompileImage/Default
 102         $(call Kernel/SetInitramfs)
 103         $(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
 104         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 105 endef
 106 define Kernel/CompileImage
 107         $(call Kernel/CompileImage/Default)
 108 endef
 109
 110 define Kernel/Clean/Default
 111         rm -f $(LINUX_DIR)/.linux-compile
 112         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 113         rm -f $(LINUX_KERNEL)
 114         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 115 endef
 116
 117 define Kernel/Clean
 118         $(call Kernel/Clean/Default)
 119 endef
 120
 121 define BuildKernel
 122   ifneq ($(LINUX_SITE),)
 123     $(DL_DIR)/$(LINUX_SOURCE):
 124                 -mkdir -p $(DL_DIR)
 125                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 126   endif
 127
 128   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 129         -rm -rf $(KERNEL_BUILD_DIR)
 130         -mkdir -p $(KERNEL_BUILD_DIR)
 131         $(call Kernel/Prepare)
 132         touch $$@
 133
 134   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 135         $(call Kernel/Configure)
 136         touch $$@
 137
 138   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 139         rm -rf $(KERNEL_BUILD_DIR)/modules
 140         @rm -f $(BUILD_DIR)/linux
 141         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 142         $(call Kernel/CompileModules)
 143         touch $$@
 144
 145   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 146         $(call Kernel/CompileImage)
 147         touch $$@
 148
 149   mostlyclean: FORCE
 150         $(call Kernel/Clean)
 151
 152   ifeq ($(DUMP),1)
 153     dumpinfo:
 154                 @echo 'Target: $(BOARD)-$(KERNEL)'
 155                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 156                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 157                 @echo 'Target-Arch: $(ARCH)'
 158                 @echo 'Target-Features: $(FEATURES)'
 159                 @echo 'Linux-Version: $(LINUX_VERSION)'
 160                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 161                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 162                 @echo 'Target-Description:'
 163                 @getvar $(call shvar,Target/Description)
 164                 @echo '@@'
 165                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 166     ifneq ($(DUMPINFO),)
 167                 @$(DUMPINFO)
 168     endif
 169   endif
 170
 171   define BuildKernel
 172   endef
 173 endef
 174
 175 define Profile/Default
 176   NAME:=
 177   PACKAGES:=
 178 endef
 179
 180 define Profile
 181   $(eval $(call Profile/Default))
 182   $(eval $(call Profile/$(1)))
 183   DUMPINFO += \
 184         echo "Target-Profile: $(1)"; \
 185         echo "Target-Profile-Name: $(NAME)"; \
 186         echo "Target-Profile-Packages: $(PACKAGES)";
 187 endef
 188
 189 $(eval $(call shexport,Target/Description))
 190
 191 download: $(DL_DIR)/$(LINUX_SOURCE)
 192 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 193 compile: $(LINUX_DIR)/.modules
 194 install: $(LINUX_DIR)/.image
 195
 196 clean: FORCE
 197         rm -f $(STAMP_DIR)/.linux-compile
 198         rm -rf $(KERNEL_BUILD_DIR)
 199
 200 rebuild: FORCE
 201         @$(MAKE) mostlyclean
 202         @if [ -f $(LINUX_KERNEL) ]; then \
 203                 $(MAKE) clean; \
 204         fi
 205         @$(MAKE) compile
 206
 207