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