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         $(SH_FUNC) \
  68         export modules=; \
  69         add_module() { \
  70                 priority="$$$$$$$$1"; \
  71                 mods="$$$$$$$$2"; \
  72                 boot="$$$$$$$$3"; \
  73                 shift 3; \
  74                 mkdir -p $(2)/etc/modules.d; \
  75                 ( \
  76                         [ "$$$$$$$$boot" = "1" ] && { \
  77                                 echo '# May be required for rootfs' ; \
  78                         } ; \
  79                         for mod in $$$$$$$$mods; do \
  80                                 echo "$$$$$$$$mod"; \
  81                         done \
  82                 ) > $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
  83                 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
  84         }; \
  85         $(3) \
  86         if [ -n "$$$$$$$$modules" ]; then \
  87                 mkdir -p $(2)/etc/modules.d; \
  88                 mkdir -p $(2)/CONTROL; \
  89                 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
  90                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
  91                 echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
  92                 echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
  93                 chmod 0755 $(2)/CONTROL/postinst; \
  94         fi
  95 endef
  96
  97 ifeq ($(DUMP)$(TARGET_BUILD),)
  98   -include $(LINUX_DIR)/.config
  99 endif
 100
 101 define KernelPackage/depends
 102   $(STAMP_BUILT): $(LINUX_DIR)/.config
 103   define KernelPackage/depends
 104   endef
 105 endef
 106
 107 define KernelPackage
 108   NAME:=$(1)
 109   $(eval $(call Package/Default))
 110   $(eval $(call KernelPackage/Defaults))
 111   $(eval $(call KernelPackage/$(1)))
 112   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 113
 114   define Package/kmod-$(1)
 115     TITLE:=$(TITLE)
 116     SECTION:=kernel
 117     CATEGORY:=Kernel modules
 118     DESCRIPTION:=$(DESCRIPTION)
 119     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE))
 120     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 121     $(call KernelPackage/$(1))
 122     $(call KernelPackage/$(1)/$(BOARD))
 123   endef
 124
 125   ifdef KernelPackage/$(1)/description
 126     define Package/kmod-$(1)/description
 127 $(call KernelPackage/$(1)/description)
 128     endef
 129   endif
 130
 131   ifdef KernelPackage/$(1)/config
 132     define Package/kmod-$(1)/config
 133 $(call KernelPackage/$(1)/config)
 134     endef
 135   endif
 136
 137   $(call KernelPackage/depends)
 138
 139   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 140     ifneq ($(strip $(FILES)),)
 141       define Package/kmod-$(1)/install
 142                   mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
 143                   $(CP) -L $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
 144                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 145                   $(call KernelPackage/$(1)/install,$$(1))
 146       endef
 147     endif
 148   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 149     else
 150       compile: kmod-$(1)-unavailable
 151       kmod-$(1)-unavailable:
 152                 @echo "WARNING: kmod-$(1) is not available in the kernel config"
 153   )
 154   endif
 155   $$(eval $$(call BuildPackage,kmod-$(1)))
 156
 157   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 158 endef
 159
 160 define AutoLoad
 161   add_module "$(1)" "$(2)" "$(3)";
 162 endef
 163
 164 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 165 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 166
 167 ifdef DUMP
 168   kernel_version_cmp=
 169 else
 170   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 171 endif
 172
 173 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 174
 175 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 176 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 177 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 178 kernel_patchver_le=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 179 kernel_patchver_lt=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 180