include/kernel.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
   8 ifeq ($(__target_inc),)
   9   include $(INCLUDE_DIR)/target.mk
  10 endif
  11
  12 ifeq ($(DUMP),1)
  13   KERNEL?=<KERNEL>
  14   BOARD?=<BOARD>
  15   LINUX_VERSION?=<LINUX_VERSION>
  16 else
  17   export GCC_HONOUR_COPTS=s
  18
  19   LINUX_KMOD_SUFFIX=ko
  20
  21   ifneq (,$(findstring uml,$(BOARD)))
  22     KERNEL_CC?=$(HOSTCC)
  23     KERNEL_CROSS?=
  24   else
  25     KERNEL_CC?=$(TARGET_CC)
  26     KERNEL_CROSS?=$(TARGET_CROSS)
  27   endif
  28
  29   ifeq ($(TARGET_BUILD),1)
  30     PATCH_DIR ?= ./patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  31     FILES_DIR ?= $(foreach dir,$(wildcard ./files ./files-$(KERNEL_PATCHVER)),"$(dir)")
  32   endif
  33   KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
  34   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  35
  36   MODULES_SUBDIR:=lib/modules/$(LINUX_VERSION)
  37   TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  38
  39   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  40
  41   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
  42   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
  43   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE)),)
  44     LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING)
  45   endif
  46
  47   ifneq ($(TARGET_BUILD),1)
  48     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  49   endif
  50 endif
  51
  52 ifneq (,$(findstring uml,$(BOARD)))
  53   LINUX_KARCH=um
  54 else
  55   ifeq (,$(LINUX_KARCH))
  56     LINUX_KARCH=$(strip $(subst i386,x86,$(subst armeb,arm,$(subst mipsel,mips,$(subst mips64,mips,$(subst mips64el,mips,$(subst sh2,sh,$(subst sh3,sh,$(subst sh4,sh,$(ARCH))))))))))
  57   endif
  58 endif
  59
  60
  61 define KernelPackage/Defaults
  62   FILES:=
  63   AUTOLOAD:=
  64 endef
  65
  66 define ModuleAutoLoad
  67         export modules=; \
  68         add_module() { \
  69                 mkdir -p $(2)/etc/modules.d; \
  70                 ( \
  71                         [ "$$$$$$$$3" = "1" ] && { \
  72                                 echo '# May be required for rootfs' ; \
  73                         } ; \
  74                         for mod in $$$$$$$$2; do \
  75                                 getvar mod; \
  76                         done \
  77                 ) > $(2)/etc/modules.d/$$$$$$$$1-$(1); \
  78                 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$1-$(1)"; \
  79         }; \
  80         $(3) \
  81         if [ -n "$$$$$$$$modules" ]; then \
  82                 mkdir -p $(2)/etc/modules.d; \
  83                 mkdir -p $(2)/CONTROL; \
  84                 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
  85                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
  86                 echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
  87                 echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
  88                 chmod 0755 $(2)/CONTROL/postinst; \
  89         fi
  90 endef
  91
  92 ifeq ($(DUMP)$(TARGET_BUILD),)
  93   -include $(LINUX_DIR)/.config
  94 endif
  95
  96 define KernelPackage/depends
  97   $(STAMP_BUILT): $(LINUX_DIR)/.config
  98   define KernelPackage/depends
  99   endef
 100 endef
 101
 102 define KernelPackage
 103   NAME:=$(1)
 104   $(eval $(call Package/Default))
 105   $(eval $(call KernelPackage/Defaults))
 106   $(eval $(call KernelPackage/$(1)))
 107   $(eval $(call KernelPackage/$(1)/$(KERNEL)))
 108   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 109
 110   define Package/kmod-$(1)
 111     TITLE:=$(TITLE)
 112     SECTION:=kernel
 113     CATEGORY:=Kernel modules
 114     DESCRIPTION:=$(DESCRIPTION)
 115     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE))
 116     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 117     $(call KernelPackage/$(1))
 118     $(call KernelPackage/$(1)/$(KERNEL))
 119     $(call KernelPackage/$(1)/$(BOARD))
 120   endef
 121
 122   ifdef KernelPackage/$(1)/description
 123     define Package/kmod-$(1)/description
 124 $(call KernelPackage/$(1)/description)
 125     endef
 126   endif
 127
 128   ifdef KernelPackage/$(1)/config
 129     define Package/kmod-$(1)/config
 130 $(call KernelPackage/$(1)/config)
 131     endef
 132   endif
 133
 134   $(call KernelPackage/depends)
 135
 136   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 137     ifneq ($(strip $(FILES)),)
 138       define Package/kmod-$(1)/install
 139                   mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
 140                   $(CP) -L $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
 141                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 142                   $(call KernelPackage/$(1)/install,$$(1))
 143       endef
 144     endif
 145   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 146     else
 147       compile: kmod-$(1)-unavailable
 148       kmod-$(1)-unavailable:
 149                 @echo "WARNING: kmod-$(1) is not available in the kernel config"
 150   )
 151   endif
 152   $$(eval $$(call BuildPackage,kmod-$(1)))
 153
 154   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 155 endef
 156
 157 define AutoLoad
 158   add_module $(1) "$(2)" $(3);
 159 endef
 160
 161 ifdef DUMP
 162   CompareKernelPatchVer=0
 163 else
 164   define CompareKernelPatchVer
 165     $(shell [ $$(echo $(1) | tr . 0) -$(2) $$(echo $(3) | tr . 0) ] && echo 1 || echo 0)
 166   endef
 167 endif
 168