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