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