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 ifdef CONFIG_STRIP_KERNEL_EXPORTS
  26   KERNEL_MAKEOPTS += \
  27         EXTRA_LDSFLAGS="-I$(KERNEL_BUILD_DIR) -include symtab.h"
  28 endif
  29
  30 INITRAMFS_EXTRA_FILES ?= $(GENERIC_PLATFORM_DIR)/image/initramfs-base-files.txt
  31
  32 ifneq (,$(KERNEL_CC))
  33   KERNEL_MAKEOPTS += CC="$(KERNEL_CC)"
  34 endif
  35
  36 # defined in quilt.mk
  37 Kernel/Patch:=$(Kernel/Patch/Default)
  38 ifeq ($(strip $(CONFIG_EXTERNAL_KERNEL_TREE)),"")
  39   ifeq ($(strip $(CONFIG_KERNEL_GIT_CLONE_URI)),"")
  40     define Kernel/Prepare/Default
  41         bzcat $(DL_DIR)/$(LINUX_SOURCE) | $(TAR) -C $(KERNEL_BUILD_DIR) $(TAR_OPTIONS)
  42         $(Kernel/Patch)
  43         touch $(LINUX_DIR)/.quilt_used
  44     endef
  45   else
  46     ifeq ($(strip $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY)),"")
  47 define Kernel/Prepare/Default
  48         git clone $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  49     endef
  50   else
  51     define Kernel/Prepare/Default
  52         git clone --reference $(CONFIG_KERNEL_GIT_LOCAL_REPOSITORY) $(CONFIG_KERNEL_GIT_CLONE_URI) $(LINUX_DIR)
  53     endef
  54   endif
  55 endif
  56 else
  57   define Kernel/Prepare/Default
  58         mkdir -p $(KERNEL_BUILD_DIR)
  59         if [ -d $(LINUX_DIR) ]; then \
  60                 rmdir $(LINUX_DIR); \
  61         fi
  62         ln -s $(CONFIG_EXTERNAL_KERNEL_TREE) $(LINUX_DIR)
  63   endef
  64 endif
  65
  66 ifeq ($(KERNEL),2.6)
  67   ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y)
  68     define Kernel/SetInitramfs
  69                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  70                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  71                 echo 'CONFIG_INITRAMFS_SOURCE="$(strip $(TARGET_DIR) $(INITRAMFS_EXTRA_FILES))"' >> $(LINUX_DIR)/.config
  72                 echo 'CONFIG_INITRAMFS_ROOT_UID=$(shell id -u)' >> $(LINUX_DIR)/.config
  73                 echo 'CONFIG_INITRAMFS_ROOT_GID=$(shell id -g)' >> $(LINUX_DIR)/.config
  74                 echo 'CONFIG_INITRAMFS_COMPRESSION_NONE=y' >> $(LINUX_DIR)/.config
  75                 echo '# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set' >> $(LINUX_DIR)/.config
  76     endef
  77   else
  78     define Kernel/SetInitramfs
  79                 mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
  80                 grep -v INITRAMFS $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
  81                 echo 'CONFIG_INITRAMFS_SOURCE=""' >> $(LINUX_DIR)/.config
  82     endef
  83   endif
  84 endif
  85
  86 define Kernel/Configure/2.4
  87         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  88         $(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig include/linux/compile.h include/linux/version.h
  89         $(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) dep
  90 endef
  91 define Kernel/Configure/2.6
  92         -$(_SINGLE)$(MAKE) $(KERNEL_MAKEOPTS) oldconfig prepare scripts
  93 endef
  94 define Kernel/Configure/Default
  95         $(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target
  96         echo "$(if $(CONFIG_KERNEL_KALLSYMS),CONFIG_KALLSYMS=y,# CONFIG_KALLSYMS is not set)" >> $(LINUX_DIR)/.config.target
  97         echo "$(if $(CONFIG_KERNEL_PROFILING),CONFIG_PROFILING=y,# CONFIG_PROFILING is not set)" >> $(LINUX_DIR)/.config.target
  98         echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target
  99         echo "# CONFIG_KALLSYMS_ALL is not set" >> $(LINUX_DIR)/.config.target
 100         echo "# CONFIG_KPROBES is not set" >> $(LINUX_DIR)/.config.target
 101         $(SED) 's,.*CONFIG_AEABI.*,$(if $(CONFIG_EABI_SUPPORT),CONFIG_AEABI=y,# CONFIG_AEABI is not set),' $(LINUX_DIR)/.config.target
 102         $(if $(CONFIG_EABI_SUPPORT),echo '# CONFIG_OABI_COMPAT is not set' >> $(LINUX_DIR)/.config.target)
 103         $(SCRIPT_DIR)/metadata.pl kconfig $(TMP_DIR)/.packageinfo $(TOPDIR)/.config > $(LINUX_DIR)/.config.override
 104         $(SCRIPT_DIR)/kconfig.pl 'm+' $(LINUX_DIR)/.config.target $(LINUX_DIR)/.config.override > $(LINUX_DIR)/.config
 105         $(call Kernel/SetInitramfs)
 106         $(call Kernel/Configure/$(KERNEL))
 107         rm -rf $(KERNEL_BUILD_DIR)/modules
 108 endef
 109
 110 define Kernel/CompileModules/Default
 111         rm -f $(LINUX_DIR)/vmlinux $(LINUX_DIR)/System.map
 112         +$(MAKE) $(KERNEL_MAKEOPTS) modules
 113 endef
 114
 115 OBJCOPY_STRIP = -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id
 116
 117 define Kernel/CompileImage/Default
 118         $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),,rm -f $(TARGET_DIR)/init)
 119         +$(MAKE) $(KERNEL_MAKEOPTS) $(KERNELNAME)
 120         $(KERNEL_CROSS)objcopy -O binary $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(LINUX_KERNEL)
 121         $(KERNEL_CROSS)objcopy $(OBJCOPY_STRIP) -S $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/vmlinux.elf
 122 endef
 123
 124 define Kernel/Clean/Default
 125         rm -f $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)/.configured
 126         rm -f $(LINUX_KERNEL)
 127         $(_SINGLE)$(MAKE) -C $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION) clean
 128 endef
 129
 130