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 include $(INCLUDE_DIR)/host.mk
   8
   9 LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
  10 LINUX_SITE=http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
  11            http://www.us.kernel.org/pub/linux/kernel/v$(KERNEL) \
  12            http://www.kernel.org/pub/linux/kernel/v$(KERNEL) \
  13            http://www.de.kernel.org/pub/linux/kernel/v$(KERNEL)
  14
  15 ifneq (,$(findstring uml,$(BOARD)))
  16   LINUX_KARCH:=um
  17 else
  18   LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  19         -e 's/mipsel/mips/' \
  20         -e 's/mipseb/mips/' \
  21         -e 's/powerpc/ppc/' \
  22         -e 's/sh[234]/sh/' \
  23         -e 's/armeb/arm/' \
  24   )
  25 endif
  26
  27 KERNELNAME=
  28 ifneq (,$(findstring x86,$(BOARD)))
  29   KERNELNAME="bzImage"
  30 endif
  31 ifneq (,$(findstring ppc,$(BOARD)))
  32   KERNELNAME="uImage"
  33 endif
  34
  35
  36 $(DL_DIR)/$(LINUX_SOURCE):
  37         -mkdir -p $(DL_DIR)
  38         $(SCRIPT_DIR)/download.pl $(DL_DIR) $(LINUX_SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_SITE)
  39
  40 $(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE)
  41         -mkdir -p $(KERNEL_BUILD_DIR)
  42         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  43         touch $@
  44
  45 ifeq ($(KERNEL),2.4)
  46 $(LINUX_DIR)/.configured: $(LINUX_DIR)/.patched
  47         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  48         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig include/linux/compile.h include/linux/version.h
  49         touch $@
  50
  51 $(LINUX_DIR)/.depend_done: $(LINUX_DIR)/.configured
  52         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" ARCH=$(LINUX_KARCH) dep
  53         touch $@
  54
  55 $(LINUX_DIR)/vmlinux: $(LINUX_DIR)/.depend_done
  56 else
  57 $(LINUX_DIR)/.configured: $(LINUX_DIR)/.patched
  58         $(MAKE) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) oldconfig prepare scripts
  59         touch $@
  60 endif
  61
  62 ramdisk-config: $(LINUX_DIR)/.configured FORCE
  63         mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  64         grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  65 ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  66         echo 'CONFIG_INITRAMFS_SOURCE="../../root"' >> $(LINUX_DIR)/.config
  67         echo 'CONFIG_INITRAMFS_ROOT_UID=0' >> $(LINUX_DIR)/.config
  68         echo 'CONFIG_INITRAMFS_ROOT_GID=0' >> $(LINUX_DIR)/.config
  69         mkdir -p $(BUILD_DIR)/root/etc/init.d
  70         $(CP) ../generic-2.6/files/init $(BUILD_DIR)/root/
  71 else
  72         rm -f $(BUILD_DIR)/root/init $(BUILD_DIR)/root/etc/init.d/S00initramfs
  73         echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  74 endif
  75
  76 $(LINUX_DIR)/vmlinux: $(LINUX_DIR)/.linux-compile ramdisk-config
  77         $(MAKE) -j$(CONFIG_JLEVEL) -C $(LINUX_DIR) CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) $(KERNELNAME)
  78
  79 $(LINUX_KERNEL): $(LINUX_DIR)/vmlinux
  80         $(KERNEL_CROSS)objcopy -O binary -R .reginfo -R .note -R .comment -R .mdebug -S $< $@
  81         touch -c $(LINUX_KERNEL)
  82
  83 $(LINUX_DIR)/.modules_done:
  84         rm -rf $(KERNEL_BUILD_DIR)/modules
  85         $(MAKE) -j$(CONFIG_JLEVEL) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) modules
  86         $(MAKE) -C "$(LINUX_DIR)" CROSS_COMPILE="$(KERNEL_CROSS)" CC="$(KERNEL_CC)" ARCH=$(LINUX_KARCH) DEPMOD=true INSTALL_MOD_PATH=$(KERNEL_BUILD_DIR)/modules modules_install
  87         touch $(LINUX_DIR)/.modules_done
  88
  89 modules: $(LINUX_DIR)/.modules_done
  90
  91 $(LINUX_DIR)/.linux-compile:
  92         @rm -f $(BUILD_DIR)/linux
  93         ln -sf $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) $(BUILD_DIR)/linux
  94         @$(MAKE) modules
  95         touch $@
  96
  97 $(TOPDIR)/.kernel.mk: $(TOPDIR)/target/linux/$(BOARD)-$(KERNEL)/Makefile
  98         echo "CONFIG_BOARD:=$(BOARD)" > $@
  99         echo "CONFIG_KERNEL:=$(KERNEL)" >> $@
 100         echo "CONFIG_LINUX_VERSION:=$(LINUX_VERSION)" >> $@
 101         echo "CONFIG_LINUX_RELEASE:=$(LINUX_RELEASE)" >> $@
 102         echo "CONFIG_LINUX_KARCH:=$(LINUX_KARCH)" >> $@
 103
 104 download: $(DL_DIR)/$(LINUX_SOURCE)
 105 prepare: $(LINUX_DIR)/.configured
 106         @mkdir -p $(LINUX_DIR)
 107
 108 compile: prepare $(LINUX_DIR)/.linux-compile
 109
 110 install: compile $(LINUX_KERNEL)
 111
 112 mostlyclean: FORCE
 113         rm -f $(LINUX_DIR)/.linux-compile
 114         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.modules_done
 115         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.drivers-unpacked
 116         $(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 117         rm -f $(LINUX_KERNEL)
 118
 119 rebuild: FORCE
 120         -$(MAKE) mostlyclean
 121         if [ -f $(LINUX_KERNEL) ]; then \
 122                 $(MAKE) clean; \
 123         fi
 124         $(MAKE) compile $(MAKE_TRACE)
 125
 126 clean: FORCE
 127         rm -f $(STAMP_DIR)/.linux-compile
 128         rm -rf $(KERNEL_BUILD_DIR)
 129