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)/kernel-version.mk
  10 include $(INCLUDE_DIR)/host.mk
  11 include $(INCLUDE_DIR)/kernel.mk
  12 include $(INCLUDE_DIR)/prereq.mk
  13
  14 LINUX_CONFIG ?= ./config/default
  15
  16 -include $(TOPDIR)/target/linux/generic-$(KERNEL)/config-template
  17 -include $(LINUX_CONFIG)
  18
  19 ifneq ($(CONFIG_ATM),)
  20   FEATURES += atm
  21 endif
  22 ifneq ($(CONFIG_PCI),)
  23   FEATURES += pci
  24 endif
  25 ifneq ($(CONFIG_USB),)
  26   FEATURES += usb
  27 endif
  28 ifneq ($(CONFIG_PCMCIA),)
  29   FEATURES += pcmcia
  30 endif
  31 ifneq ($(CONFIG_VIDEO_DEV),)
  32   FEATURES += video
  33 endif
  34
  35 # remove duplicates
  36 FEATURES:=$(sort $(FEATURES))
  37
  38 # For target profile selection - the default set
  39 DEFAULT_PACKAGES:=base-files libgcc uclibc bridge busybox dnsmasq dropbear iptables mtd ppp ppp-mod-pppoe mtd kmod-ipt-nathelper
  40 ifneq ($(KERNEL),2.4)
  41   DEFAULT_PACKAGES+=udevtrigger hotplug2
  42 endif
  43
  44 ifeq ($(DUMP),1)
  45   all: dumpinfo
  46 else
  47   all: compile
  48 endif
  49
  50 ifneq (,$(findstring uml,$(BOARD)))
  51   LINUX_KARCH:=um
  52 else
  53   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  54         -e 's/mipsel/mips/' \
  55         -e 's/mipseb/mips/' \
  56         -e 's/powerpc/ppc/' \
  57         -e 's/sh[234]/sh/' \
  58         -e 's/armeb/arm/' \
  59   )
  60 endif
  61
  62 KERNELNAME=
  63 ifneq (,$(findstring x86,$(BOARD)))
  64   KERNELNAME="bzImage"
  65 endif
  66 ifneq (,$(findstring rdc,$(BOARD)))
  67   KERNELNAME="bzImage"
  68 endif
  69 ifneq (,$(findstring ppc,$(BOARD)))
  70   KERNELNAME="uImage"
  71 endif
  72
  73
  74 define Kernel/Prepare/Default
  75         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  76         if [ -d $(GENERIC_PLATFORM_DIR)/patches ]; then $(PATCH) $(LINUX_DIR) $(GENERIC_PLATFORM_DIR)/patches; fi
  77         if [ -d ./files ]; then $(CP) ./files/* $(LINUX_DIR)/; fi
  78         if [ -d ./patches ]; then $(PATCH) $(LINUX_DIR) ./patches; fi
  79 endef
  80 define Kernel/Prepare
  81         $(call Kernel/Prepare/Default)
  82 endef
  83
  84 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  85         CROSS_COMPILE="$(KERNEL_CROSS)" \
  86         ARCH="$(LINUX_KARCH)" \
  87         CONFIG_SHELL="$(BASH)"
  88
  89 define Kernel/Configure/2.4
  90         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  91         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig include/linux/compile.h include/linux/version.h
  92         $(MAKE) $(KERNEL_MAKEOPTS) dep
  93 endef
  94 define Kernel/Configure/2.6
  95         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig prepare scripts
  96 endef
  97 define Kernel/Configure/Default
  98         @if [ -f "./config/profile-$(PROFILE)" ]; then \
  99                 $(SCRIPT_DIR)/config.pl '+' $(GENERIC_PLATFORM_DIR)/config-template '+' $(LINUX_CONFIG) ./config/profile-$(PROFILE) > $(LINUX_DIR)/.config; \
 100         else \
 101                 $(SCRIPT_DIR)/config.pl '+' $(GENERIC_PLATFORM_DIR)/config-template $(LINUX_CONFIG) > $(LINUX_DIR)/.config; \
 102         fi
 103 endef
 104 define Kernel/Configure
 105         $(call Kernel/Configure/Default)
 106 endef
 107
 108
 109 define Kernel/CompileModules/Default
 110         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" modules
 111         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
 112 endef
 113 define Kernel/CompileModules
 114         $(call Kernel/CompileModules/Default)
 115 endef
 116
 117
 118 ifeq ($(KERNEL),2.6)
 119   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 120     define Kernel/SetInitramfs
 121                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 122                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 123                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 124                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 125                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 126                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 127                 $(CP) $(GENERIC_PLATFORM_DIR)/files/init $(BUILD_DIR)/root/
 128     endef
 129   else
 130     define Kernel/SetInitramfs
 131                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 132                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 133                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 134                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 135     endef
 136   endif
 137 endif
 138 define Kernel/CompileImage/Default
 139         $(call Kernel/SetInitramfs)
 140         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" $(KERNELNAME)
 141         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 142         $(KERNEL_CROSS)objcopy -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 143 endef
 144 define Kernel/CompileImage
 145         $(call Kernel/CompileImage/Default)
 146 endef
 147
 148 define Kernel/Clean/Default
 149         rm -f $(LINUX_DIR)/.linux-compile
 150         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 151         rm -f $(LINUX_KERNEL)
 152         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 153 endef
 154
 155 define Kernel/Clean
 156         $(call Kernel/Clean/Default)
 157 endef
 158
 159 define BuildKernel
 160   ifneq ($(LINUX_SITE),)
 161     $(DL_DIR)/$(LINUX_SOURCE):
 162                 -mkdir -p $(DL_DIR)
 163                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 164   endif
 165
 166   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 167         -rm -rf $(KERNEL_BUILD_DIR)
 168         -mkdir -p $(KERNEL_BUILD_DIR)
 169         $(call Kernel/Prepare)
 170         touch $$@
 171
 172   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 173         $(call Kernel/Configure)
 174         $(call Kernel/Configure/$(KERNEL))
 175         touch $$@
 176
 177   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 178         rm -rf $(KERNEL_BUILD_DIR)/modules
 179         @rm -f $(BUILD_DIR)/linux
 180         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 181         $(call Kernel/CompileModules)
 182         touch $$@
 183
 184   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 185         $(call Kernel/CompileImage)
 186         touch $$@
 187
 188   mostlyclean: FORCE
 189         $(call Kernel/Clean)
 190
 191   ifeq ($(DUMP),1)
 192     dumpinfo:
 193                 @echo 'Target: $(BOARD)-$(KERNEL)'
 194                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 195                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 196                 @echo 'Target-Arch: $(ARCH)'
 197                 @echo 'Target-Features: $(FEATURES)'
 198                 @echo 'Linux-Version: $(LINUX_VERSION)'
 199                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 200                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 201                 @echo 'Target-Description:'
 202                 @getvar $(call shvar,Target/Description)
 203                 @echo '@@'
 204                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 205     ifneq ($(DUMPINFO),)
 206                 @$(DUMPINFO)
 207     endif
 208   endif
 209
 210   define BuildKernel
 211   endef
 212 endef
 213
 214 define Profile/Default
 215   NAME:=
 216   PACKAGES:=
 217 endef
 218
 219 confname=$(subst .,_,$(subst -,_,$(1)))
 220 define Profile
 221   $(eval $(call Profile/Default))
 222   $(eval $(call Profile/$(1)))
 223   $(eval $(call shexport,Profile/$(1)/Description))
 224   DUMPINFO += \
 225         echo "Target-Profile: $(1)"; \
 226         echo "Target-Profile-Name: $(NAME)"; \
 227         echo "Target-Profile-Packages: $(PACKAGES)"; \
 228         if [ -f ./config/profile-$(1) ]; then \
 229                 echo "Target-Profile-Kconfig: yes"; \
 230         fi; \
 231         echo "Target-Profile-Description:"; \
 232         getvar "$(call shvar,Profile/$(1)/Description)"; \
 233         echo "@@"; \
 234         echo;
 235   ifeq ($(CONFIG_LINUX_$(call confname,$(KERNEL)_$(1))),y)
 236     PROFILE=$(1)
 237   endif
 238 endef
 239
 240 $(eval $(call shexport,Target/Description))
 241
 242 download: $(DL_DIR)/$(LINUX_SOURCE)
 243 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 244 compile: $(LINUX_DIR)/.modules
 245 menuconfig: $(LINUX_DIR)/.prepared FORCE
 246         $(call Kernel/Configure)
 247         $(SCRIPT_DIR)/config.pl '+' $(GENERIC_PLATFORM_DIR)/config-template $(LINUX_CONFIG) > $(LINUX_DIR)/.config
 248         $(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) menuconfig
 249         $(SCRIPT_DIR)/config.pl '>' $(GENERIC_PLATFORM_DIR)/config-template $(LINUX_DIR)/.config > $(LINUX_CONFIG)
 250
 251 install: $(LINUX_DIR)/.image
 252
 253 clean: FORCE
 254         rm -f $(STAMP_DIR)/.linux-compile
 255         rm -rf $(KERNEL_BUILD_DIR)
 256
 257 rebuild: FORCE
 258         @$(MAKE) mostlyclean
 259         @if [ -f $(LINUX_KERNEL) ]; then \
 260                 $(MAKE) clean; \
 261         fi
 262         @$(MAKE) compile
 263
 264