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) $(LINUX_DIR) ../generic-$(KERNEL)/patches
  67         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  68 endef
  69 define Kernel/Prepare
  70         $(call Kernel/Prepare/Default)
  71 endef
  72
  73
  74 define Kernel/Configure/2.4
  75         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  76         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
  77         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
  78 endef
  79 define Kernel/Configure/2.6
  80         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
  81 endef
  82 define Kernel/Configure/Default
  83         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  84         $(call Kernel/Configure/$(KERNEL))
  85 endef
  86 define Kernel/Configure
  87         $(call Kernel/Configure/Default)
  88 endef
  89
  90
  91 define Kernel/CompileModules/Default
  92         $(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
  93         $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  94 endef
  95 define Kernel/CompileModules
  96         $(call Kernel/CompileModules/Default)
  97 endef
  98
  99
 100 ifeq ($(KERNEL),2.6)
 101   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 102     define Kernel/SetInitramfs
 103                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 104                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 105                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 106                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 107                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 108                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 109                 $(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
 110     endef
 111   else
 112     define Kernel/SetInitramfs
 113                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 114                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 115                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 116                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 117     endef
 118   endif
 119 endif
 120 define Kernel/CompileImage/Default
 121         $(call Kernel/SetInitramfs)
 122         $(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
 123         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 124 endef
 125 define Kernel/CompileImage
 126         $(call Kernel/CompileImage/Default)
 127 endef
 128
 129 define Kernel/Clean/Default
 130         rm -f $(LINUX_DIR)/.linux-compile
 131         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 132         rm -f $(LINUX_KERNEL)
 133         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 134 endef
 135
 136 define Kernel/Clean
 137         $(call Kernel/Clean/Default)
 138 endef
 139
 140 define BuildKernel
 141   ifneq ($(LINUX_SITE),)
 142     $(DL_DIR)/$(LINUX_SOURCE):
 143                 -mkdir -p $(DL_DIR)
 144                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 145   endif
 146
 147   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 148         -rm -rf $(KERNEL_BUILD_DIR)
 149         -mkdir -p $(KERNEL_BUILD_DIR)
 150         $(call Kernel/Prepare)
 151         touch $$@
 152
 153   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 154         $(call Kernel/Configure)
 155         touch $$@
 156
 157   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 158         rm -rf $(KERNEL_BUILD_DIR)/modules
 159         @rm -f $(BUILD_DIR)/linux
 160         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 161         $(call Kernel/CompileModules)
 162         touch $$@
 163
 164   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 165         $(call Kernel/CompileImage)
 166         touch $$@
 167
 168   mostlyclean: FORCE
 169         $(call Kernel/Clean)
 170
 171   ifeq ($(DUMP),1)
 172     dumpinfo:
 173                 @echo 'Target: $(BOARD)-$(KERNEL)'
 174                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 175                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 176                 @echo 'Target-Arch: $(ARCH)'
 177                 @echo 'Target-Features: $(FEATURES)'
 178                 @echo 'Linux-Version: $(LINUX_VERSION)'
 179                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 180                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 181                 @echo 'Target-Description:'
 182                 @getvar $(call shvar,Target/Description)
 183                 @echo '@@'
 184                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 185     ifneq ($(DUMPINFO),)
 186                 @$(DUMPINFO)
 187     endif
 188   endif
 189
 190   define BuildKernel
 191   endef
 192 endef
 193
 194 define Profile/Default
 195   NAME:=
 196   PACKAGES:=
 197 endef
 198
 199 define Profile
 200   $(eval $(call Profile/Default))
 201   $(eval $(call Profile/$(1)))
 202   DUMPINFO += \
 203         echo "Target-Profile: $(1)"; \
 204         echo "Target-Profile-Name: $(NAME)"; \
 205         echo "Target-Profile-Packages: $(PACKAGES)";
 206 endef
 207
 208 $(eval $(call shexport,Target/Description))
 209
 210 download: $(DL_DIR)/$(LINUX_SOURCE)
 211 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 212 compile: $(LINUX_DIR)/.modules
 213 install: $(LINUX_DIR)/.image
 214
 215 clean: FORCE
 216         rm -f $(STAMP_DIR)/.linux-compile
 217         rm -rf $(KERNEL_BUILD_DIR)
 218
 219 rebuild: FORCE
 220         @$(MAKE) mostlyclean
 221         @if [ -f $(LINUX_KERNEL) ]; then \
 222                 $(MAKE) clean; \
 223         fi
 224         @$(MAKE) compile
 225
 226