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 $(LINUX_DIR)/include/config/kernel.release))
  68   endif
  69
  70   MODULES_SUBDIR:=lib/modules/$(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 $(ARCH) , sh2 sh3 sh4 ))
  89   LINUX_KARCH := sh
  90 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
  91   LINUX_KARCH := x86
  92 else
  93   LINUX_KARCH := $(ARCH)
  94 endif
  95
  96 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
  97
  98 KERNEL_MAKE_FLAGS := \
  99         HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
 100         CROSS_COMPILE="$(KERNEL_CROSS)" \
 101         ARCH="$(LINUX_KARCH)" \
 102         KBUILD_HAVE_NLS=no \
 103         KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
 104         KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
 105         KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
 106         KBUILD_BUILD_VERSION="0" \
 107         HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
 108         CONFIG_SHELL="$(BASH)" \
 109         $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
 110         $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
 111         cmd_syscalls=
 112
 113 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
 114   KERNEL_MAKE_FLAGS += \
 115         KERNELRELEASE=$(LINUX_VERSION)
 116 endif
 117
 118 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
 119
 120 ifdef CONFIG_USE_SPARSE
 121   KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
 122 endif
 123
 124 define KernelPackage/Defaults
 125   FILES:=
 126   AUTOLOAD:=
 127   PKGFLAGS+=nonshared
 128 endef
 129
 130 define ModuleAutoLoad
 131         $(SH_FUNC) \
 132         export modules=; \
 133         probe_module() { \
 134                 local mods="$$$$$$$$1"; \
 135                 local boot="$$$$$$$$2"; \
 136                 local mod; \
 137                 shift 2; \
 138                 for mod in $$$$$$$$mods; do \
 139                         mkdir -p $(2)/etc/modules.d; \
 140                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
 141                 done; \
 142                 if [ -e $(2)/etc/modules.d/$(1) ]; then \
 143                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
 144                                 mkdir -p $(2)/etc/modules-boot.d; \
 145                                 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
 146                         fi; \
 147                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
 148                 fi; \
 149         }; \
 150         add_module() { \
 151                 local priority="$$$$$$$$1"; \
 152                 local mods="$$$$$$$$2"; \
 153                 local boot="$$$$$$$$3"; \
 154                 local mod; \
 155                 shift 3; \
 156                 for mod in $$$$$$$$mods; do \
 157                         mkdir -p $(2)/etc/modules.d; \
 158                         echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
 159                 done; \
 160                 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
 161                         if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
 162                                 mkdir -p $(2)/etc/modules-boot.d; \
 163                                 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
 164                         fi; \
 165                         modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
 166                 fi; \
 167         }; \
 168         $(3) \
 169         if [ -n "$$$$$$$$modules" ]; then \
 170                 modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
 171                 mkdir -p $(2)/etc/modules.d; \
 172                 mkdir -p $(2)/CONTROL; \
 173                 echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
 174                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
 175                 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
 176                 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
 177                 chmod 0755 $(2)/CONTROL/postinst-pkg; \
 178         fi
 179 endef
 180
 181 ifeq ($(DUMP)$(TARGET_BUILD),)
 182   -include $(LINUX_DIR)/.config
 183 endif
 184
 185 define KernelPackage/depends
 186   $(STAMP_BUILT): $(LINUX_DIR)/.config
 187   define KernelPackage/depends
 188   endef
 189 endef
 190
 191 define KernelPackage
 192   NAME:=$(1)
 193   $(eval $(call Package/Default))
 194   $(eval $(call KernelPackage/Defaults))
 195   $(eval $(call KernelPackage/$(1)))
 196   $(eval $(call KernelPackage/$(1)/$(BOARD)))
 197   $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
 198
 199   define Package/kmod-$(1)
 200     TITLE:=$(TITLE)
 201     SECTION:=kernel
 202     CATEGORY:=Kernel modules
 203     DESCRIPTION:=$(DESCRIPTION)
 204     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
 205     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
 206     PKGFLAGS:=$(PKGFLAGS)
 207     $(call KernelPackage/$(1))
 208     $(call KernelPackage/$(1)/$(BOARD))
 209     $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
 210   endef
 211
 212   ifdef KernelPackage/$(1)/conffiles
 213     define Package/kmod-$(1)/conffiles
 214 $(call KernelPackage/$(1)/conffiles)
 215     endef
 216   endif
 217
 218   ifdef KernelPackage/$(1)/description
 219     define Package/kmod-$(1)/description
 220 $(call KernelPackage/$(1)/description)
 221     endef
 222   endif
 223
 224   ifdef KernelPackage/$(1)/config
 225     define Package/kmod-$(1)/config
 226 $(call KernelPackage/$(1)/config)
 227     endef
 228   endif
 229
 230   $(call KernelPackage/depends)
 231
 232   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
 233     ifneq ($(strip $(FILES)),)
 234       define Package/kmod-$(1)/install
 235                   @for mod in $$(call version_filter,$$(FILES)); do \
 236                         if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
 237                                 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
 238                         elif [ -e $$$$$$$$mod ]; then \
 239                                 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
 240                                 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
 241                         else \
 242                                 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
 243                                 exit 1; \
 244                         fi; \
 245                   done;
 246                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
 247                   $(call KernelPackage/$(1)/install,$$(1))
 248       endef
 249     endif
 250   $(if $(CONFIG_PACKAGE_kmod-$(1)),
 251     else
 252       compile: $(1)-disabled
 253       $(1)-disabled:
 254                 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
 255
 256       define Package/kmod-$(1)/install
 257                 true
 258       endef
 259   )
 260   endif
 261   $$(eval $$(call BuildPackage,kmod-$(1)))
 262
 263   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
 264 endef
 265
 266 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
 267
 268 define AutoLoad
 269   add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
 270 endef
 271
 272 define AutoProbe
 273   probe_module "$(call version_filter,$(1))" "$(2)";
 274 endef
 275
 276 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
 277 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)) ))
 278
 279 ifdef DUMP
 280   kernel_version_cmp=
 281 else
 282   kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
 283 endif
 284
 285 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
 286
 287 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
 288 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
 289 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
 290 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
 291 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
 292