include/kernel.mk

   1 #
   2 # Copyright (C) 2006-2011 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   LINUX_VERMAGIC?=<LINUX_VERMAGIC>
  17 else
  18   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  19     export GCC_HONOUR_COPTS=s
  20   endif
  21
  22   LINUX_KMOD_SUFFIX=ko
  23
  24   ifneq (,$(findstring uml,$(BOARD)))
  25     KERNEL_CC?=$(HOSTCC)
  26     KERNEL_CROSS?=
  27   else
  28     KERNEL_CC?=$(TARGET_CC)
  29     KERNEL_CROSS?=$(TARGET_CROSS)
  30   endif
  31
  32   ifeq ($(TARGET_BUILD),1)
  33     PATCH_DIR ?= ./patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  34     FILES_DIR ?= $(foreach dir,$(wildcard ./files ./files-$(KERNEL_PATCHVER)),"$(dir)")
  35   endif
  36   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
  37   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  38   ifeq ($(strip $(call CompareKernelPatchVer,$(KERNEL_PATCHVER),ge,3.7.0)),1)
  39     LINUX_UAPI_DIR=uapi/
  40   endif
  41   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
  42   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
  43
  44   LINUX_UNAME_VERSION:=$(if $(word 3,$(subst ., ,$(KERNEL_BASE))),$(KERNEL_BASE),$(KERNEL_BASE).0)
  45   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  46     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  47   endif
  48
  49   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  50   TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  51
  52   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  53
  54   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
  55   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
  56   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  57       LINUX_SITE:=@KERNEL/linux/kernel/v3.x$(TESTING)
  58   endif
  59
  60   ifneq ($(TARGET_BUILD),1)
  61     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  62   endif
  63 endif
  64
  65 ifneq (,$(findstring uml,$(BOARD)))
  66   LINUX_KARCH=um
  67 else ifneq (,$(findstring $(ARCH), aarch64 aarch64_be))
  68   LINUX_KARCH := arm64
  69 else ifneq (,$(findstring $(ARCH), armeb))
  70   LINUX_KARCH := arm
  71 else ifneq (,$(findstring $(ARCH), mipsel mips64 mips64el))
  72   LINUX_KARCH := mips
  73 else ifneq (,$(findstring $(ARCH), sh2 sh3 sh4))
  74   LINUX_KARCH := sh
  75 else ifneq (,$(findstring $(ARCH), i386))
  76   LINUX_KARCH := x86
  77 else
  78   LINUX_KARCH := $(ARCH)
  79 endif
  80
  81 define KernelPackage/Defaults
  82   FILES:=
  83   AUTOLOAD:=
  84 endef
  85
  86 define ModuleAutoLoad
  87         $(SH_FUNC) \
  88         export modules=; \
  89         probe_module() { \
  90                 mods="$$$$$$$$1"; \
  91                 boot="$$$$$$$$2"; \
  92                 shift 2; \
  93                 for mod in $$$$$$$$mods; do \
  94                         mkdir -p $(2)/etc/modules.d; \
  95                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
  96                 done; \
  97                 if [ -e $(2)/etc/modules.d/$(1) ]; then \
  98                         if [ "$$$$$$$$boot" = "1" ]; then \
  99                                 mkdir -p $(2)/etc/modules-boot.d; \
 100                                 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
 101                         fi; \
 102                         modules="$$$$$$$${modules:+$$$$$$$$modules}"; \
 103                 fi; \
 104         }; \
 105         add_module() { \
 106                 priority="$$$$$$$$1"; \
 107                 mods="$$$$$$$$2"; \
 108                 boot="$$$$$$$$3"; \
 109                 shift 3; \
 110                 for mod in $$$$$$$$mods; do \
 111                         mkdir -p $(2)/etc/modules.d; \
 112                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
 113                 done; \
 114                 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
 115                         if [ "$$$$$$$$boot" = "1" ]; then \
 116                                 mkdir -p $(2)/etc/modules-boot.d; \
 117                                 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
 118                         fi; \
 119                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
 120                 fi; \
 121         }; \
 122         $(3) \
 123         if [ -n "$$$$$$$$modules" ]; then \
 124                 mkdir -p $(2)/etc/modules.d; \
 125                 mkdir -p $(2)/CONTROL; \
 126                 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
 127                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
 128                 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst; \
 129                 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
 130                 chmod 0755 $(2)/CONTROL/postinst; \
 131         fi
 132 endef
 133
 134 ifeq ($(DUMP)$(TARGET_BUILD),)
 135   -include $(LINUX_DIR)/.config
 136 endif
 137
 138 define KernelPackage/depends
 139   $(STAMP_BUILT): $(LINUX_DIR)/.config
 140   define KernelPackage/depends
 141   endef
 142 endef
 143
 144 define KernelPackage
 145   NAME:=$(1)
 146   $(eval $(call Package/Default))
 147   $(eval $(call KernelPackage/Defaults))
 148   $(eval $(call KernelPackage/$(1)))
 149   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 150
 151   define Package/kmod-$(1)
 152     TITLE:=$(TITLE)
 153     SECTION:=kernel
 154     CATEGORY:=Kernel modules
 155     DESCRIPTION:=$(DESCRIPTION)
 156     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 157     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 158     $(call KernelPackage/$(1))
 159     $(call KernelPackage/$(1)/$(BOARD))
 160   endef
 161
 162   ifdef KernelPackage/$(1)/description
 163     define Package/kmod-$(1)/description
 164 $(call KernelPackage/$(1)/description)
 165     endef
 166   endif
 167
 168   ifdef KernelPackage/$(1)/config
 169     define Package/kmod-$(1)/config
 170 $(call KernelPackage/$(1)/config)
 171     endef
 172   endif
 173
 174   $(call KernelPackage/depends)
 175
 176   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 177     ifneq ($(if $(SDK),$(filter-out $(LINUX_DIR)/%.ko,$(FILES)),$(strip $(FILES))),)
 178       define Package/kmod-$(1)/install
 179                   @for mod in $$(FILES); do \
 180                         if [ -e $$$$$$$$mod ]; then \
 181                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 182                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 183                         elif [ -e "$(LINUX_DIR)/modules.builtin" ]; then \
 184                                 if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 185                                         echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 186                                 else \
 187                                         echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 188                                         exit 1; \
 189                                 fi; \
 190                         else \
 191                                 echo "WARNING: module '$$$$$$$$mod' missing and modules.builtin not available, assuming built-in." >&2; \
 192                         fi; \
 193                   done;
 194                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 195                   $(call KernelPackage/$(1)/install,$$(1))
 196       endef
 197     endif
 198   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 199     else
 200       compile: $(1)-disabled
 201       $(1)-disabled:
 202                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 203
 204       define Package/kmod-$(1)/install
 205                 true
 206       endef
 207   )
 208   endif
 209   $$(eval $$(call BuildPackage,kmod-$(1)))
 210
 211   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 212 endef
 213
 214 define AutoLoad
 215   add_module "$(1)" "$(2)" "$(3)";
 216 endef
 217
 218 define AutoProbe
 219   probe_module "$(1)" "$(2)";
 220 endef
 221
 222 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 223 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)) ))
 224
 225 ifdef DUMP
 226   kernel_version_cmp=
 227 else
 228   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 229 endif
 230
 231 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 232
 233 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 234 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 235 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 236 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 237 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 238