include/kernel-defaults.mk

   1 #
   2 # Copyright (C) 2006-2007 OpenWrt.org
   3 #
   4 # This is free software, licensed under the GNU General Public License v2.
   5 # See /LICENSE for more information.
   6 #
   7
   8 KERNELNAME=
   9 ifneq (,$(findstring x86,$(BOARD)))
  10   KERNELNAME="bzImage"
  11 endif
  12 ifneq (,$(findstring rdc,$(BOARD)))
  13   KERNELNAME="bzImage"
  14 endif
  15 ifneq (,$(findstring avr32,$(BOARD)))
  16   KERNELNAME="uImage"
  17 endif
  18
  19 KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
  20         CROSS_COMPILE="$(KERNEL_CROSS)" \
  21         ARCH="$(LINUX_KARCH)" \
  22         KBUILD_HAVE_NLS=no \
  23         CONFIG_SHELL="$(BASH)"
  24
  25 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  26
  27 ifneq (,$(KERNEL_CC))
  28   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  29 endif
  30
  31 # defined in quilt.mk
  32 Kernel/Patch:=$(Kernel/Patch/Default)
  33 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  34   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  35     define Kernel/Prepare/Default
  36         bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  37         $(Kernel/Patch)
  38         touch $(LINUX_DIR)/.quilt_used
  39     endef
  40   else
  41     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  42 define Kernel/Prepare/Default
  43         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  44     endef
  45   else
  46     define Kernel/Prepare/Default
  47         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  48     endef
  49   endif
  50 endif
  51 else
  52   define Kernel/Prepare/Default
  53         mkdir -p $(KERNEL_BUILD_DIR)
  54         if [ -d $(LINUX_DIR) ]; then \
  55                 rmdir $(LINUX_DIR); \
  56         fi
  57         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  58   endef
  59 endif
  60
  61 ifeq ($(KERNEL),2.6)
  62   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  63     define Kernel/SetInitramfs
  64                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  65                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  66                 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  67                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  68                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  69     endef
  70   else
  71     define Kernel/SetInitramfs
  72                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  73                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  74                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  75     endef
  76   endif
  77 endif
  78
  79 define Kernel/Configure/2.4
  80         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  81         $(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig include/linux/compile.h include/linux/version.h
  82         $(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) dep
  83 endef
  84 define Kernel/Configure/2.6
  85         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
  86 endef
  87 define Kernel/Configure/Default
  88         $(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target
  89         echo "$(if $(CONFIG_KERNEL_KALLSYMS),CONFIG_KALLSYMS=y,# CONFIG_KALLSYMS is not set)" >> $(LINUX_DIR)/.config.target
  90         echo "$(if $(CONFIG_KERNEL_PROFILING),CONFIG_PROFILING=y,# CONFIG_PROFILING is not set)" >> $(LINUX_DIR)/.config.target
  91         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  92         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
  93         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
  94         $(SED) 's,.*CONFIG_AEABI.*,$(if $(CONFIG_EABI_SUPPORT),CONFIG_AEABI=y,# CONFIG_AEABI is not set),' $(LINUX_DIR)/.config.target
  95         $(if $(CONFIG_EABI_SUPPORT),echo '# CONFIG_OABI_COMPAT is not set' >> $(LINUX_DIR)/.config.target)
  96         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
  97         $(SCRIPT_DIR)/kconfig.pl 'm+' $(LINUX_DIR)/.config.target $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
  98         $(call Kernel/SetInitramfs)
  99         $(call Kernel/Configure/$(KERNEL))
 100         rm -rf $(KERNEL_BUILD_DIR)/modules
 101 endef
 102
 103 define Kernel/CompileModules/Default
 104         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 105         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 106 endef
 107
 108 OBJCOPY_STRIP = -R .reginfo -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 109
 110 define Kernel/CompileImage/Default
 111         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 112         +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 113         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 114         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 115 endef
 116
 117 define Kernel/Clean/Default
 118         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 119         rm -f $(LINUX_KERNEL)
 120         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 121 endef
 122
 123