ath79: add support for Arduino Yun
[openwrt/openwrt.git] / 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:=$(KERNEL_BASE)
56 ifneq ($(findstring -rc,$(LINUX_VERSION)),)
57 LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
58 endif
59
60 LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
61
62 ifneq (,$(findstring -rc,$(LINUX_VERSION)))
63 LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.gz
64 else
65 LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.xz
66 endif
67
68 ifneq (,$(findstring -rc,$(LINUX_VERSION)))
69 LINUX_SITE:=https://git.kernel.org/torvalds/t
70 else ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
71 LINUX_SITE:=@KERNEL/linux/kernel/v$(word 1,$(subst ., ,$(KERNEL_BASE))).x
72 else
73 LINUX_UNAME_VERSION:=$(strip $(shell cat $(LINUX_DIR)/include/config/kernel.release 2>/dev/null))
74 endif
75
76 MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
77 TARGET_MODULES_DIR:=$(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
78
79 ifneq ($(TARGET_BUILD),1)
80 PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(if $(BUILD_VARIANT),$(PKG_NAME)-$(BUILD_VARIANT)/)$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
81 endif
82 endif
83
84 ifneq (,$(findstring uml,$(BOARD)))
85 LINUX_KARCH=um
86 else ifneq (,$(findstring $(ARCH) , aarch64 aarch64_be ))
87 LINUX_KARCH := arm64
88 else ifneq (,$(findstring $(ARCH) , arceb ))
89 LINUX_KARCH := arc
90 else ifneq (,$(findstring $(ARCH) , armeb ))
91 LINUX_KARCH := arm
92 else ifneq (,$(findstring $(ARCH) , mipsel mips64 mips64el ))
93 LINUX_KARCH := mips
94 else ifneq (,$(findstring $(ARCH) , powerpc64 ))
95 LINUX_KARCH := powerpc
96 else ifneq (,$(findstring $(ARCH) , sh2 sh3 sh4 ))
97 LINUX_KARCH := sh
98 else ifneq (,$(findstring $(ARCH) , i386 x86_64 ))
99 LINUX_KARCH := x86
100 else
101 LINUX_KARCH := $(ARCH)
102 endif
103
104 KERNEL_MAKE = $(MAKE) $(KERNEL_MAKEOPTS)
105
106 KERNEL_MAKE_FLAGS = \
107 KCFLAGS="$(call iremap,$(BUILD_DIR),$(notdir $(BUILD_DIR)))" \
108 HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
109 CROSS_COMPILE="$(KERNEL_CROSS)" \
110 ARCH="$(LINUX_KARCH)" \
111 KBUILD_HAVE_NLS=no \
112 KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
113 KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
114 KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
115 KBUILD_BUILD_VERSION="0" \
116 HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
117 KBUILD_HOSTLDLIBS="-L$(STAGING_DIR_HOST)/lib" \
118 CONFIG_SHELL="$(BASH)" \
119 $(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \
120 $(if $(PKG_BUILD_ID),LDFLAGS_MODULE=--build-id=0x$(PKG_BUILD_ID)) \
121 cmd_syscalls=
122
123 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
124 KERNEL_MAKE_FLAGS += \
125 KERNELRELEASE=$(LINUX_VERSION)
126 endif
127
128 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
129
130 ifdef CONFIG_USE_SPARSE
131 KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
132 endif
133
134 ifneq ($(HOST_OS),Linux)
135 KERNEL_MAKEOPTS += CONFIG_STACK_VALIDATION=
136 export SKIP_STACK_VALIDATION:=1
137 endif
138
139 PKG_EXTMOD_SUBDIRS ?= .
140
141 PKG_SYMVERS_DIR = $(KERNEL_BUILD_DIR)/symvers
142
143 define populate_module_symvers
144 @mkdir -p $(PKG_SYMVERS_DIR)
145 cat /dev/null > $(PKG_SYMVERS_DIR)/$(PKG_NAME).symvers; \
146 for subdir in $(PKG_EXTMOD_SUBDIRS); do \
147 cat $(PKG_SYMVERS_DIR)/*.symvers 2>/dev/null > $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers; \
148 done
149 endef
150
151 define collect_module_symvers
152 for subdir in $(PKG_EXTMOD_SUBDIRS); do \
153 realdir=$$$$(readlink -f $(PKG_BUILD_DIR)); \
154 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
155 [ "$(PKG_BUILD_DIR)" = "$$$$realdir" ] || \
156 grep -F $$$$realdir $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
157 done; \
158 sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
159 mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_SYMVERS_DIR)/$(PKG_NAME).symvers
160 endef
161
162 define KernelPackage/hooks
163 ifneq ($(PKG_NAME),kernel)
164 Hooks/Compile/Pre += populate_module_symvers
165 Hooks/Compile/Post += collect_module_symvers
166 endif
167 define KernelPackage/hooks
168 endef
169 endef
170
171 define KernelPackage/Defaults
172 FILES:=
173 AUTOLOAD:=
174 MODPARAMS:=
175 PKGFLAGS+=nonshared
176 endef
177
178 # 1: name
179 # 2: install prefix
180 # 3: module priority prefix
181 # 4: required for boot
182 # 5: module list
183 define ModuleAutoLoad
184 $(if $(5), \
185 mkdir -p $(2)/etc/modules.d; \
186 ($(foreach mod,$(5), \
187 echo "$(mod)$(if $(MODPARAMS.$(mod)), $(MODPARAMS.$(mod)),$(if $(MODPARAMS), $(MODPARAMS)))"; )) > $(2)/etc/modules.d/$(3)$(1); \
188 $(if $(4), \
189 mkdir -p $(2)/etc/modules-boot.d; \
190 ln -sf ../modules.d/$(3)$(1) $(2)/etc/modules-boot.d/;))
191 endef
192
193 ifeq ($(DUMP)$(TARGET_BUILD),)
194 -include $(LINUX_DIR)/.config
195 endif
196
197 define KernelPackage/depends
198 $(STAMP_BUILT): $(LINUX_DIR)/.config
199 define KernelPackage/depends
200 endef
201 endef
202
203 define KernelPackage
204 NAME:=$(1)
205 $(eval $(call Package/Default))
206 $(eval $(call KernelPackage/Defaults))
207 $(eval $(call KernelPackage/$(1)))
208 $(eval $(call KernelPackage/$(1)/$(BOARD)))
209 $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
210
211 define Package/kmod-$(1)
212 TITLE:=$(TITLE)
213 SECTION:=kernel
214 CATEGORY:=Kernel modules
215 DESCRIPTION:=$(DESCRIPTION)
216 EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
217 VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
218 PKGFLAGS:=$(PKGFLAGS)
219 $(call KernelPackage/$(1))
220 $(call KernelPackage/$(1)/$(BOARD))
221 $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
222 endef
223
224 ifdef KernelPackage/$(1)/conffiles
225 define Package/kmod-$(1)/conffiles
226 $(call KernelPackage/$(1)/conffiles)
227 endef
228 endif
229
230 ifdef KernelPackage/$(1)/description
231 define Package/kmod-$(1)/description
232 $(call KernelPackage/$(1)/description)
233 endef
234 endif
235
236 ifdef KernelPackage/$(1)/config
237 define Package/kmod-$(1)/config
238 $(call KernelPackage/$(1)/config)
239 endef
240 endif
241
242 $(call KernelPackage/depends)
243 $(call KernelPackage/hooks)
244
245 ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
246 define Package/kmod-$(1)/install
247 @for mod in $$(call version_filter,$$(FILES)); do \
248 if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
249 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
250 elif [ -e $$$$$$$$mod ]; then \
251 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
252 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
253 else \
254 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
255 exit 1; \
256 fi; \
257 done;
258 $(call ModuleAutoLoad,$(1),$$(1),$(filter-out 0-,$(word 1,$(AUTOLOAD))-),$(filter-out 0,$(word 2,$(AUTOLOAD))),$(sort $(wordlist 3,99,$(AUTOLOAD))))
259 $(call KernelPackage/$(1)/install,$$(1))
260 endef
261 $(if $(CONFIG_PACKAGE_kmod-$(1)),
262 else
263 compile: $(1)-disabled
264 $(1)-disabled:
265 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
266
267 define Package/kmod-$(1)/install
268 true
269 endef
270 )
271 endif
272 $$(eval $$(call BuildPackage,kmod-$(1)))
273
274 $$(IPKG_kmod-$(1)): $$(wildcard $$(call version_filter,$$(FILES)))
275
276 endef
277
278 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
279
280 # 1: priority (optional)
281 # 2: module list
282 # 3: boot flag
283 define AutoLoad
284 $(if $(1),$(1),0) $(if $(3),1,0) $(call version_filter,$(2))
285 endef
286
287 # 1: module list
288 # 2: boot flag
289 define AutoProbe
290 $(call AutoLoad,,$(1),$(2))
291 endef
292
293 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
294 kernel_version_merge=$$(( ($(call version_field,1,$(1)) << 24) + ($(call version_field,2,$(1)) << 16) + ($(call version_field,3,$(1)) << 8) + $(call version_field,4,$(1)) ))
295
296 ifdef DUMP
297 kernel_version_cmp=
298 else
299 kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
300 endif
301
302 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
303
304 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
305 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
306 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
307 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
308 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
309