include/kernel.mk

   1 #
   2 # Copyright (C) 2006-2015 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 ifneq ($(filter check,$(MAKECMDGOALS)),)
   9 CHECK:=1
  10 DUMP:=1
  11 endif
  12
  13 ifneq ($(SOURCE_DATE_EPOCH),)
  14   ifndef DUMP
  15     KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
  16   endif
  17 endif
  18
  19 ifeq ($(__target_inc),)
  20   ifndef CHECK
  21     include $(INCLUDE_DIR)/target.mk
  22   endif
  23 endif
  24
  25 ifeq ($(DUMP),1)
  26   KERNEL?=<KERNEL>
  27   BOARD?=<BOARD>
  28   LINUX_VERSION?=<LINUX_VERSION>
  29   LINUX_VERMAGIC?=<LINUX_VERMAGIC>
  30 else
  31   ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
  32     export GCC_HONOUR_COPTS=s
  33   endif
  34
  35   LINUX_KMOD_SUFFIX=ko
  36
  37   ifneq (,$(findstring uml,$(BOARD)))
  38     KERNEL_CC?=$(HOSTCC)
  39     KERNEL_CROSS?=
  40   else
  41     KERNEL_CC?=$(TARGET_CC)
  42     KERNEL_CROSS?=$(TARGET_CROSS)
  43   endif
  44
  45   ifeq ($(TARGET_BUILD),1)
  46     PATCH_DIR ?= $(CURDIR)/patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
  47     FILES_DIR ?= $(foreach dir,$(wildcard $(CURDIR)/files $(CURDIR)/files-$(KERNEL_PATCHVER)),"$(dir)")
  48   endif
  49   KERNEL_BUILD_DIR ?= $(BUILD_DIR)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))
  50   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
  51   LINUX_UAPI_DIR=uapi/
  52   LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
  53   LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
  54
  55   LINUX_UNAME_VERSION:=$(if $(word 3,$(subst ., ,$(KERNEL_BASE))),$(KERNEL_BASE),$(KERNEL_BASE).0)
  56   ifneq ($(findstring -rc,$(LINUX_VERSION)),)
  57     LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
  58   endif
  59
  60   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
  61
  62   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
  63   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
  64   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
  65       LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x$(TESTING)
  66   else
  67       LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
  68   endif
  69
  70   MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
  71   TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
  72
  73   ifneq ($(TARGET_BUILD),1)
  74     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
  75   endif
  76 endif
  77
  78 ifneq (,$(findstring uml,$(BOARD)))
  79   LINUX_KARCH=um
  80 else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
  81   LINUX_KARCH := arm64
  82 else ifneq (,$(findstring $(ARCH) , arceb ))
  83   LINUX_KARCH := arc
  84 else ifneq (,$(findstring $(ARCH) , armeb ))
  85   LINUX_KARCH := arm
  86 else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
  87   LINUX_KARCH := mips
  88 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
  89   LINUX_KARCH := powerpc
  90 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
  91   LINUX_KARCH := sh
  92 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
  93   LINUX_KARCH := x86
  94 else
  95   LINUX_KARCH := $(ARCH)
  96 endif
  97
  98 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
  99
 100 KERNEL_MAKE_FLAGS := \
 101         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 102         CROSS_COMPILE="$(KERNEL_CROSS)" \
 103         ARCH="$(LINUX_KARCH)" \
 104         KBUILD_HAVE_NLS=no \
 105         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 106         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 107         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 108         KBUILD_BUILD_VERSION="0" \
 109         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 110         CONFIG_SHELL="$(BASH)" \
 111         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 112         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 113         cmd_syscalls=
 114
 115 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 116   KERNEL_MAKE_FLAGS += \
 117         KERNELRELEASE=$(LINUX_VERSION)
 118 endif
 119
 120 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 121
 122 ifdef CONFIG_USE_SPARSE
 123   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 124 endif
 125
 126 PKG_EXTMOD_SUBDIRS ?= .
 127
 128 define populate_module_symvers
 129         cat /dev/null > $(PKG_INFO_DIR)/$(PKG_NAME).symvers; \
 130         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 131                 cat $(PKG_INFO_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
 132         done
 133 endef
 134
 135 define collect_module_symvers
 136         for subdir in $(PKG_EXTMOD_SUBDIRS); do \
 137                 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
 138         done; \
 139         sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
 140         mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
 141 endef
 142
 143 define KernelPackage/hooks
 144   ifneq ($(PKG_NAME),kernel)
 145     Hooks/Compile/Pre += populate_module_symvers
 146     Hooks/Compile/Post += collect_module_symvers
 147   endif
 148   define KernelPackage/hooks
 149   endef
 150 endef
 151
 152 define KernelPackage/Defaults
 153   FILES:=
 154   AUTOLOAD:=
 155   PKGFLAGS+=nonshared
 156 endef
 157
 158 define ModuleAutoLoad
 159         $(SH_FUNC) \
 160         export modules=; \
 161         probe_module() { \
 162                 local mods="$$$$$$$$1"; \
 163                 local boot="$$$$$$$$2"; \
 164                 local mod; \
 165                 shift 2; \
 166                 for mod in $$$$$$$$mods; do \
 167                         mkdir -p $(2)/etc/modules.d; \
 168                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
 169                 done; \
 170                 if [ -e $(2)/etc/modules.d/$(1) ]; then \
 171                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
 172                                 mkdir -p $(2)/etc/modules-boot.d; \
 173                                 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
 174                         fi; \
 175                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
 176                 fi; \
 177         }; \
 178         add_module() { \
 179                 local priority="$$$$$$$$1"; \
 180                 local mods="$$$$$$$$2"; \
 181                 local boot="$$$$$$$$3"; \
 182                 local mod; \
 183                 shift 3; \
 184                 for mod in $$$$$$$$mods; do \
 185                         mkdir -p $(2)/etc/modules.d; \
 186                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
 187                 done; \
 188                 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
 189                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
 190                                 mkdir -p $(2)/etc/modules-boot.d; \
 191                                 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
 192                         fi; \
 193                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
 194                 fi; \
 195         }; \
 196         $(3) \
 197         if [ -n "$$$$$$$$modules" ]; then \
 198                 modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
 199                 mkdir -p $(2)/etc/modules.d; \
 200                 mkdir -p $(2)/CONTROL; \
 201                 echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
 202                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
 203                 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
 204                 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
 205                 chmod 0755 $(2)/CONTROL/postinst-pkg; \
 206         fi
 207 endef
 208
 209 ifeq ($(DUMP)$(TARGET_BUILD),)
 210   -include $(LINUX_DIR)/.config
 211 endif
 212
 213 define KernelPackage/depends
 214   $(STAMP_BUILT): $(LINUX_DIR)/.config
 215   define KernelPackage/depends
 216   endef
 217 endef
 218
 219 define KernelPackage
 220   NAME:=$(1)
 221   $(eval $(call Package/Default))
 222   $(eval $(call KernelPackage/Defaults))
 223   $(eval $(call KernelPackage/$(1)))
 224   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 225   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 226
 227   define Package/kmod-$(1)
 228     TITLE:=$(TITLE)
 229     SECTION:=kernel
 230     CATEGORY:=Kernel modules
 231     DESCRIPTION:=$(DESCRIPTION)
 232     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 233     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 234     PKGFLAGS:=$(PKGFLAGS)
 235     $(call KernelPackage/$(1))
 236     $(call KernelPackage/$(1)/$(BOARD))
 237     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 238   endef
 239
 240   ifdef KernelPackage/$(1)/conffiles
 241     define Package/kmod-$(1)/conffiles
 242 $(call KernelPackage/$(1)/conffiles)
 243     endef
 244   endif
 245
 246   ifdef KernelPackage/$(1)/description
 247     define Package/kmod-$(1)/description
 248 $(call KernelPackage/$(1)/description)
 249     endef
 250   endif
 251
 252   ifdef KernelPackage/$(1)/config
 253     define Package/kmod-$(1)/config
 254 $(call KernelPackage/$(1)/config)
 255     endef
 256   endif
 257
 258   $(call KernelPackage/depends)
 259   $(call KernelPackage/hooks)
 260
 261   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 262     ifneq ($(strip $(FILES)),)
 263       define Package/kmod-$(1)/install
 264                   @for mod in $$(call version_filter,$$(FILES)); do \
 265                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 266                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 267                         elif [ -e $$$$$$$$mod ]; then \
 268                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 269                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 270                         else \
 271                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 272                                 exit 1; \
 273                         fi; \
 274                   done;
 275                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 276                   $(call KernelPackage/$(1)/install,$$(1))
 277       endef
 278     endif
 279   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 280     else
 281       compile: $(1)-disabled
 282       $(1)-disabled:
 283                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 284
 285       define Package/kmod-$(1)/install
 286                 true
 287       endef
 288   )
 289   endif
 290   $$(eval $$(call BuildPackage,kmod-$(1)))
 291
 292   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 293 endef
 294
 295 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 296
 297 define AutoLoad
 298   add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
 299 endef
 300
 301 define AutoProbe
 302   probe_module "$(call version_filter,$(1))" "$(2)";
 303 endef
 304
 305 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 306 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)) ))
 307
 308 ifdef DUMP
 309   kernel_version_cmp=
 310 else
 311   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 312 endif
 313
 314 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 315
 316 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 317 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 318 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 319 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 320 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 321