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