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
  37 include $(INCLUDE_DIR)/kernel-version.mk
  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 rdc,$(BOARD)))
  60   KERNELNAME="bzImage"
  61 endif
  62 ifneq (,$(findstring ppc,$(BOARD)))
  63   KERNELNAME="uImage"
  64 endif
  65
  66
  67 define Kernel/Prepare/Default
  68         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  69         [ -d $(GENERIC_PLATFORM_DIR)/patches ] && $(PATCH) $(LINUX_DIR) $(GENERIC_PLATFORM_DIR)/patches
  70         [ -d ./patches ] && $(PATCH) $(LINUX_DIR) ./patches
  71 endef
  72 define Kernel/Prepare
  73         $(call Kernel/Prepare/Default)
  74 endef
  75
  76 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  77         CROSS_COMPILE="$(KERNEL_CROSS)" \
  78         ARCH="$(LINUX_KARCH)" \
  79         CONFIG_SHELL="$(BASH)"
  80
  81 define Kernel/Configure/2.4
  82         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  83         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig include/linux/compile.h include/linux/version.h
  84         $(MAKE) $(KERNEL_MAKEOPTS) dep
  85 endef
  86 define Kernel/Configure/2.6
  87         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" oldconfig prepare scripts
  88 endef
  89 define Kernel/Configure/Default
  90         @$(CP) $(LINUX_CONFIG) $(LINUX_DIR)/.config
  91         $(call Kernel/Configure/$(KERNEL))
  92 endef
  93 define Kernel/Configure
  94         $(call Kernel/Configure/Default)
  95 endef
  96
  97
  98 define Kernel/CompileModules/Default
  99         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" modules
 100         $(MAKE) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
 101 endef
 102 define Kernel/CompileModules
 103         $(call Kernel/CompileModules/Default)
 104 endef
 105
 106
 107 ifeq ($(KERNEL),2.6)
 108   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
 109     define Kernel/SetInitramfs
 110                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 111                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 112                 echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
 113                 echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
 114                 echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
 115                 mkdir -p $(BUILD_DIR)/root/etc/init.d
 116                 $(CP) $(GENERIC_PLATFORM_DIR)/files/init $(BUILD_DIR)/root/
 117     endef
 118   else
 119     define Kernel/SetInitramfs
 120                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
 121                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
 122                 rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
 123                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
 124     endef
 125   endif
 126 endif
 127 define Kernel/CompileImage/Default
 128         $(call Kernel/SetInitramfs)
 129         $(MAKE) -j$(CONFIG_JLEVEL) $(KERNEL_MAKEOPTS) CC="$(KERNEL_CC)" $(KERNELNAME)
 130         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 131 endef
 132 define Kernel/CompileImage
 133         $(call Kernel/CompileImage/Default)
 134 endef
 135
 136 define Kernel/Clean/Default
 137         rm -f $(LINUX_DIR)/.linux-compile
 138         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 139         rm -f $(LINUX_KERNEL)
 140         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 141 endef
 142
 143 define Kernel/Clean
 144         $(call Kernel/Clean/Default)
 145 endef
 146
 147 define BuildKernel
 148   ifneq ($(LINUX_SITE),)
 149     $(DL_DIR)/$(LINUX_SOURCE):
 150                 -mkdir -p $(DL_DIR)
 151                 $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
 152   endif
 153
 154   $(LINUX_DIR)/.prepared: $(DL_DIR)/$(LINUX_SOURCE)
 155         -rm -rf $(KERNEL_BUILD_DIR)
 156         -mkdir -p $(KERNEL_BUILD_DIR)
 157         $(call Kernel/Prepare)
 158         touch $$@
 159
 160   $(LINUX_DIR)/.configured: $(LINUX_DIR)/.prepared $(LINUX_CONFIG)
 161         $(call Kernel/Configure)
 162         touch $$@
 163
 164   $(LINUX_DIR)/.modules: $(LINUX_DIR)/.configured
 165         rm -rf $(KERNEL_BUILD_DIR)/modules
 166         @rm -f $(BUILD_DIR)/linux
 167         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
 168         $(call Kernel/CompileModules)
 169         touch $$@
 170
 171   $(LINUX_DIR)/.image: $(LINUX_DIR)/.configured FORCE
 172         $(call Kernel/CompileImage)
 173         touch $$@
 174
 175   mostlyclean: FORCE
 176         $(call Kernel/Clean)
 177
 178   ifeq ($(DUMP),1)
 179     dumpinfo:
 180                 @echo 'Target: $(BOARD)-$(KERNEL)'
 181                 @echo 'Target-Name: $(BOARDNAME) [$(KERNEL)]'
 182                 @echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'
 183                 @echo 'Target-Arch: $(ARCH)'
 184                 @echo 'Target-Features: $(FEATURES)'
 185                 @echo 'Linux-Version: $(LINUX_VERSION)'
 186                 @echo 'Linux-Release: $(LINUX_RELEASE)'
 187                 @echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'
 188                 @echo 'Target-Description:'
 189                 @getvar $(call shvar,Target/Description)
 190                 @echo '@@'
 191                 @echo 'Default-Packages: $(DEFAULT_PACKAGES)'
 192     ifneq ($(DUMPINFO),)
 193                 @$(DUMPINFO)
 194     endif
 195   endif
 196
 197   define BuildKernel
 198   endef
 199 endef
 200
 201 define Profile/Default
 202   NAME:=
 203   PACKAGES:=
 204 endef
 205
 206 define Profile
 207   $(eval $(call Profile/Default))
 208   $(eval $(call Profile/$(1)))
 209   DUMPINFO += \
 210         echo "Target-Profile: $(1)"; \
 211         echo "Target-Profile-Name: $(NAME)"; \
 212         echo "Target-Profile-Packages: $(PACKAGES)";
 213 endef
 214
 215 $(eval $(call shexport,Target/Description))
 216
 217 download: $(DL_DIR)/$(LINUX_SOURCE)
 218 prepare: $(LINUX_DIR)/.configured $(TMP_DIR)/.kernel.mk
 219 compile: $(LINUX_DIR)/.modules
 220 install: $(LINUX_DIR)/.image
 221
 222 clean: FORCE
 223         rm -f $(STAMP_DIR)/.linux-compile
 224         rm -rf $(KERNEL_BUILD_DIR)
 225
 226 rebuild: FORCE
 227         @$(MAKE) mostlyclean
 228         @if [ -f $(LINUX_KERNEL) ]; then \
 229                 $(MAKE) clean; \
 230         fi
 231         @$(MAKE) compile
 232
 233