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 $(INCLUDE_DIR)/prereq.mk
  10
  11 # For target profile selection - the default set
  12 DEFAULT_PACKAGES:=base-files libgcc uclibc bridge busybox dnsmasq dropbear iptables mtd ppp ppp-mod-pppoe mtd
  13
  14 ifeq ($(DUMP),1)
  15   all: dumpinfo
  16 else
  17   all: compile
  18 endif
  19 KERNEL:=2.$(word 2,$(subst ., ,$(strip $(LINUX_VERSION))))
  20
  21 include $(INCLUDE_DIR)/host.mk
  22 include $(INCLUDE_DIR)/kernel.mk
  23
  24 LINUX_CONFIG:=./config
  25
  26 ifneq (,$(findstring uml,$(BOARD)))
  27   LINUX_KARCH:=um
  28 else
  29   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  30         -e 's/mipsel/mips/' \
  31         -e 's/mipseb/mips/' \
  32         -e 's/powerpc/ppc/' \
  33         -e 's/sh[234]/sh/' \
  34         -e 's/armeb/arm/' \
  35   )
  36 endif
  37
  38 KERNELNAME=
  39 ifneq (,$(findstring x86,$(BOARD)))
  40   KERNELNAME="bzImage"
  41 endif
  42 ifneq (,$(findstring ppc,$(BOARD)))
  43   KERNELNAME="uImage"
  44 endif
  45
  46
  47 define Kernel/Prepare/Default
  48         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  49         [ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) ../generic-$(KERNEL)/patches
  50         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  51 endef
  52 define Kernel/Prepare
  53         $(call Kernel/Prepare/Default)
  54 endef
  55
  56
  57 define Kernel/Configure/2.4
  58         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  59         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
  60         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
  61 endef
  62 define Kernel/Configure/2.6
  63         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
  64 endef
  65 define Kernel/Configure/Default
  66         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  67         $(call Kernel/Configure/$(KERNEL))
  68 endef
  69 define Kernel/Configure
  70         $(call Kernel/Configure/Default)
  71 endef
  72
  73
  74 define Kernel/CompileModules/Default
  75         $(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
  76         $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  77 endef
  78 define Kernel/CompileModules
  79         $(call Kernel/CompileModules/Default)
  80 endef
  81
  82
  83 ifeq ($(KERNEL),2.6)
  84   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  85     define Kernel/SetInitramfs
  86                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  87                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  88                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
  89                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
  90                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
  91                 mkdir -p $(BUILD_DIR)/root/etc/init.d
  92                 $(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
  93     endef
  94   else
  95     define Kernel/SetInitramfs
  96                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  97                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  98                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
  99                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 100     endef
 101   endif
 102 endif
 103 define Kernel/CompileImage/Default
 104         $(call Kernel/SetInitramfs)
 105         $(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
 106         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 107 endef
 108 define Kernel/CompileImage
 109         $(call Kernel/CompileImage/Default)
 110 endef
 111
 112 define Kernel/Clean/Default
 113         rm -f $(LINUX_DIR)/.linux-compile
 114         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 115         rm -f $(LINUX_KERNEL)
 116         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 117 endef
 118
 119 define Kernel/Clean
 120         $(call Kernel/Clean/Default)
 121 endef
 122
 123 define BuildKernel
 124   ifneq ($(LINUX_SITE),)
 125     $(DL_DIR)/$(LINUX_SOURCE):
 126                 -mkdir -p $(DL_DIR)
 127                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 128   endif
 129
 130   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 131         -rm -rf $(KERNEL_BUILD_DIR)
 132         -mkdir -p $(KERNEL_BUILD_DIR)
 133         $(call Kernel/Prepare)
 134         touch $$@
 135
 136   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 137         $(call Kernel/Configure)
 138         touch $$@
 139
 140   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 141         rm -rf $(KERNEL_BUILD_DIR)/modules
 142         @rm -f $(BUILD_DIR)/linux
 143         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 144         $(call Kernel/CompileModules)
 145         touch $$@
 146
 147   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 148         $(call Kernel/CompileImage)
 149         touch $$@
 150
 151   mostlyclean: FORCE
 152         $(call Kernel/Clean)
 153
 154   ifeq ($(DUMP),1)
 155     dumpinfo:
 156                 @echo 'Target: $(BOARD)-$(KERNEL)'
 157                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 158                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 159                 @echo 'Target-Arch: $(ARCH)'
 160                 @echo 'Target-Features: $(FEATURES)'
 161                 @echo 'Linux-Version: $(LINUX_VERSION)'
 162                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 163                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 164                 @echo 'Target-Description:'
 165                 @getvar $(call shvar,Target/Description)
 166                 @echo '@@'
 167                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 168     ifneq ($(DUMPINFO),)
 169                 @$(DUMPINFO)
 170     endif
 171   endif
 172
 173   define BuildKernel
 174   endef
 175 endef
 176
 177 define Profile/Default
 178   NAME:=
 179   PACKAGES:=
 180 endef
 181
 182 define Profile
 183   $(eval $(call Profile/Default))
 184   $(eval $(call Profile/$(1)))
 185   DUMPINFO += \
 186         echo "Target-Profile: $(1)"; \
 187         echo "Target-Profile-Name: $(NAME)"; \
 188         echo "Target-Profile-Packages: $(PACKAGES)";
 189 endef
 190
 191 $(eval $(call shexport,Target/Description))
 192
 193 download: $(DL_DIR)/$(LINUX_SOURCE)
 194 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 195 compile: $(LINUX_DIR)/.modules
 196 install: $(LINUX_DIR)/.image
 197
 198 clean: FORCE
 199         rm -f $(STAMP_DIR)/.linux-compile
 200         rm -rf $(KERNEL_BUILD_DIR)
 201
 202 rebuild: FORCE
 203         @$(MAKE) mostlyclean
 204         @if [ -f $(LINUX_KERNEL) ]; then \
 205                 $(MAKE) clean; \
 206         fi
 207         @$(MAKE) compile
 208
 209