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 ($(CONFIG_PCMCIA),)
  22   FEATURES += pcmcia
  23 endif
  24
  25 # remove duplicates
  26 FEATURES:=$(sort $(FEATURES))
  27
  28 # For target profile selection - the default set
  29 DEFAULT_PACKAGES:=base-files libgcc uclibc bridge busybox dnsmasq dropbear iptables mtd ppp ppp-mod-pppoe mtd
  30
  31 ifeq ($(DUMP),1)
  32   all: dumpinfo
  33 else
  34   all: compile
  35 endif
  36 KERNEL:=2.$(word 2,$(subst ., ,$(strip $(LINUX_VERSION))))
  37
  38 include $(INCLUDE_DIR)/host.mk
  39 include $(INCLUDE_DIR)/kernel.mk
  40
  41 LINUX_CONFIG:=./config
  42
  43 ifneq (,$(findstring uml,$(BOARD)))
  44   LINUX_KARCH:=um
  45 else
  46   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  47         -e 's/mipsel/mips/' \
  48         -e 's/mipseb/mips/' \
  49         -e 's/powerpc/ppc/' \
  50         -e 's/sh[234]/sh/' \
  51         -e 's/armeb/arm/' \
  52   )
  53 endif
  54
  55 KERNELNAME=
  56 ifneq (,$(findstring x86,$(BOARD)))
  57   KERNELNAME="bzImage"
  58 endif
  59 ifneq (,$(findstring ppc,$(BOARD)))
  60   KERNELNAME="uImage"
  61 endif
  62
  63
  64 define Kernel/Prepare/Default
  65         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  66         [ -d ../generic-$(KERNEL)/patches ] && $(PATCH) $(LINUX_DIR) $(GENERIC_PLATFORM_DIR)/patches
  67         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  68 endef
  69 define Kernel/Prepare
  70         $(call Kernel/Prepare/Default)
  71 endef
  72
  73 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  74         CROSS_COMPILE="$(KERNEL_CROSS)" \
  75         ARCH="$(LINUX_KARCH)" \
  76         CONFIG_SHELL="$(BASH)"
  77
  78 define Kernel/Configure/2.4
  79         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  80         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig include/linux/compile.h include/linux/version.h
  81         $(MAKE) $(KERNEL_MAKEOPTS) dep
  82 endef
  83 define Kernel/Configure/2.6
  84         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig prepare scripts
  85 endef
  86 define Kernel/Configure/Default
  87         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  88         $(call Kernel/Configure/$(KERNEL))
  89 endef
  90 define Kernel/Configure
  91         $(call Kernel/Configure/Default)
  92 endef
  93
  94
  95 define Kernel/CompileModules/Default
  96         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" modules
  97         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  98 endef
  99 define Kernel/CompileModules
 100         $(call Kernel/CompileModules/Default)
 101 endef
 102
 103
 104 ifeq ($(KERNEL),2.6)
 105   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 106     define Kernel/SetInitramfs
 107                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 108                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 109                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 110                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 111                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 112                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 113                 $(CP) $(GENERIC_PLATFORM_DIR)/files/init $(BUILD_DIR)/root/
 114     endef
 115   else
 116     define Kernel/SetInitramfs
 117                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 118                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 119                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 120                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 121     endef
 122   endif
 123 endif
 124 define Kernel/CompileImage/Default
 125         $(call Kernel/SetInitramfs)
 126         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" $(KERNELNAME)
 127         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 128 endef
 129 define Kernel/CompileImage
 130         $(call Kernel/CompileImage/Default)
 131 endef
 132
 133 define Kernel/Clean/Default
 134         rm -f $(LINUX_DIR)/.linux-compile
 135         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 136         rm -f $(LINUX_KERNEL)
 137         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 138 endef
 139
 140 define Kernel/Clean
 141         $(call Kernel/Clean/Default)
 142 endef
 143
 144 define BuildKernel
 145   ifneq ($(LINUX_SITE),)
 146     $(DL_DIR)/$(LINUX_SOURCE):
 147                 -mkdir -p $(DL_DIR)
 148                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 149   endif
 150
 151   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 152         -rm -rf $(KERNEL_BUILD_DIR)
 153         -mkdir -p $(KERNEL_BUILD_DIR)
 154         $(call Kernel/Prepare)
 155         touch $$@
 156
 157   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 158         $(call Kernel/Configure)
 159         touch $$@
 160
 161   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 162         rm -rf $(KERNEL_BUILD_DIR)/modules
 163         @rm -f $(BUILD_DIR)/linux
 164         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 165         $(call Kernel/CompileModules)
 166         touch $$@
 167
 168   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 169         $(call Kernel/CompileImage)
 170         touch $$@
 171
 172   mostlyclean: FORCE
 173         $(call Kernel/Clean)
 174
 175   ifeq ($(DUMP),1)
 176     dumpinfo:
 177                 @echo 'Target: $(BOARD)-$(KERNEL)'
 178                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 179                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 180                 @echo 'Target-Arch: $(ARCH)'
 181                 @echo 'Target-Features: $(FEATURES)'
 182                 @echo 'Linux-Version: $(LINUX_VERSION)'
 183                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 184                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 185                 @echo 'Target-Description:'
 186                 @getvar $(call shvar,Target/Description)
 187                 @echo '@@'
 188                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 189     ifneq ($(DUMPINFO),)
 190                 @$(DUMPINFO)
 191     endif
 192   endif
 193
 194   define BuildKernel
 195   endef
 196 endef
 197
 198 define Profile/Default
 199   NAME:=
 200   PACKAGES:=
 201 endef
 202
 203 define Profile
 204   $(eval $(call Profile/Default))
 205   $(eval $(call Profile/$(1)))
 206   DUMPINFO += \
 207         echo "Target-Profile: $(1)"; \
 208         echo "Target-Profile-Name: $(NAME)"; \
 209         echo "Target-Profile-Packages: $(PACKAGES)";
 210 endef
 211
 212 $(eval $(call shexport,Target/Description))
 213
 214 download: $(DL_DIR)/$(LINUX_SOURCE)
 215 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 216 compile: $(LINUX_DIR)/.modules
 217 install: $(LINUX_DIR)/.image
 218
 219 clean: FORCE
 220         rm -f $(STAMP_DIR)/.linux-compile
 221         rm -rf $(KERNEL_BUILD_DIR)
 222
 223 rebuild: FORCE
 224         @$(MAKE) mostlyclean
 225         @if [ -f $(LINUX_KERNEL) ]; then \
 226                 $(MAKE) clean; \
 227         fi
 228         @$(MAKE) compile
 229
 230