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   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  18     export GCC_HONOUR_COPTS=s
  19   endif
  20
  21   LINUX_KMOD_SUFFIX=ko
  22
  23   ifneq (,$(findstring uml,$(BOARD)))
  24     KERNEL_CC?=$(HOSTCC)
  25     KERNEL_CROSS?=
  26   else
  27     KERNEL_CC?=$(TARGET_CC)
  28     KERNEL_CROSS?=$(TARGET_CROSS)
  29   endif
  30
  31   ifeq ($(TARGET_BUILD),1)
  32     PATCH_DIR ?= ./patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  33     FILES_DIR ?= $(foreach dir,$(wildcard ./files ./files-$(KERNEL_PATCHVER)),"$(dir)")
  34   endif
  35   KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
  36   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  37
  38   LINUX_UNAME_VERSION:=$(if $(word 3,$(subst ., ,$(KERNEL_BASE))),$(KERNEL_BASE),$(KERNEL_BASE).0)
  39   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  40     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  41   endif
  42
  43   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  44   TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  45
  46   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  47
  48   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
  49   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
  50   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE)),)
  51     LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING)
  52   endif
  53
  54   ifneq ($(TARGET_BUILD),1)
  55     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  56   endif
  57 endif
  58
  59 ifneq (,$(findstring uml,$(BOARD)))
  60   LINUX_KARCH=um
  61 else
  62   ifeq (,$(LINUX_KARCH))
  63     LINUX_KARCH=$(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))))))))))
  64   endif
  65 endif
  66
  67
  68 define KernelPackage/Defaults
  69   FILES:=
  70   AUTOLOAD:=
  71 endef
  72
  73 define ModuleAutoLoad
  74         $(SH_FUNC) \
  75         export modules=; \
  76         add_module() { \
  77                 priority="$$$$$$$$1"; \
  78                 mods="$$$$$$$$2"; \
  79                 boot="$$$$$$$$3"; \
  80                 shift 3; \
  81                 mkdir -p $(2)/etc/modules.d; \
  82                 ( \
  83                         [ "$$$$$$$$boot" = "1" ] && { \
  84                                 echo '# May be required for rootfs' ; \
  85                         } ; \
  86                         for mod in $$$$$$$$mods; do \
  87                                 echo "$$$$$$$$mod"; \
  88                         done \
  89                 ) > $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
  90                 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
  91         }; \
  92         $(3) \
  93         if [ -n "$$$$$$$$modules" ]; then \
  94                 mkdir -p $(2)/etc/modules.d; \
  95                 mkdir -p $(2)/CONTROL; \
  96                 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
  97                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
  98                 echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
  99                 echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
 100                 chmod 0755 $(2)/CONTROL/postinst; \
 101         fi
 102 endef
 103
 104 ifeq ($(DUMP)$(TARGET_BUILD),)
 105   -include $(LINUX_DIR)/.config
 106 endif
 107
 108 define KernelPackage/depends
 109   $(STAMP_BUILT): $(LINUX_DIR)/.config
 110   define KernelPackage/depends
 111   endef
 112 endef
 113
 114 define KernelPackage
 115   NAME:=$(1)
 116   $(eval $(call Package/Default))
 117   $(eval $(call KernelPackage/Defaults))
 118   $(eval $(call KernelPackage/$(1)))
 119   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 120
 121   define Package/kmod-$(1)
 122     TITLE:=$(TITLE)
 123     SECTION:=kernel
 124     CATEGORY:=Kernel modules
 125     DESCRIPTION:=$(DESCRIPTION)
 126     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE))
 127     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 128     $(call KernelPackage/$(1))
 129     $(call KernelPackage/$(1)/$(BOARD))
 130   endef
 131
 132   ifdef KernelPackage/$(1)/description
 133     define Package/kmod-$(1)/description
 134 $(call KernelPackage/$(1)/description)
 135     endef
 136   endif
 137
 138   ifdef KernelPackage/$(1)/config
 139     define Package/kmod-$(1)/config
 140 $(call KernelPackage/$(1)/config)
 141     endef
 142   endif
 143
 144   $(call KernelPackage/depends)
 145
 146   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 147     ifneq ($(strip $(FILES)),)
 148       define Package/kmod-$(1)/install
 149                   mkdir -p $$(1)/$(MODULES_SUBDIR)
 150                   $(CP) -L $$(FILES) $$(1)/$(MODULES_SUBDIR)/
 151                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 152                   $(call KernelPackage/$(1)/install,$$(1))
 153       endef
 154     endif
 155   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 156     else
 157       compile: kmod-$(1)-unavailable
 158       kmod-$(1)-unavailable:
 159                 @echo "WARNING: kmod-$(1) is not available in the kernel config"
 160   )
 161   endif
 162   $$(eval $$(call BuildPackage,kmod-$(1)))
 163
 164   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 165 endef
 166
 167 define AutoLoad
 168   add_module "$(1)" "$(2)" "$(3)";
 169 endef
 170
 171 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 172 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
 173
 174 ifdef DUMP
 175   kernel_version_cmp=
 176 else
 177   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 178 endif
 179
 180 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 181
 182 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 183 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 184 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 185 kernel_patchver_le=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 186 kernel_patchver_lt=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 187