f2d2a129d7f387d153d67051066c6cf5630b61f0
[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:=$(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)/$$$$subdir/Module.symvers; \
132 done
133 endef
134
135 define collect_module_symvers
136 @mkdir -p $(PKG_INFO_DIR)
137 for subdir in $(PKG_EXTMOD_SUBDIRS); do \
138 grep -F $(PKG_BUILD_DIR) $(PKG_BUILD_DIR)/$$$$subdir/Module.symvers >> $(PKG_BUILD_DIR)/Module.symvers.tmp; \
139 done; \
140 sort -u $(PKG_BUILD_DIR)/Module.symvers.tmp > $(PKG_BUILD_DIR)/Module.symvers; \
141 mv $(PKG_BUILD_DIR)/Module.symvers $(PKG_INFO_DIR)/$(PKG_NAME).symvers
142 endef
143
144 define KernelPackage/hooks
145 ifneq ($(PKG_NAME),kernel)
146 Hooks/Compile/Pre += populate_module_symvers
147 Hooks/Compile/Post += collect_module_symvers
148 endif
149 define KernelPackage/hooks
150 endef
151 endef
152
153 define KernelPackage/Defaults
154 FILES:=
155 AUTOLOAD:=
156 PKGFLAGS+=nonshared
157 endef
158
159 define ModuleAutoLoad
160 $(SH_FUNC) \
161 export modules=; \
162 probe_module() { \
163 local mods="$$$$$$$$1"; \
164 local boot="$$$$$$$$2"; \
165 local mod; \
166 shift 2; \
167 for mod in $$$$$$$$mods; do \
168 mkdir -p $(2)/etc/modules.d; \
169 echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
170 done; \
171 if [ -e $(2)/etc/modules.d/$(1) ]; then \
172 if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
173 mkdir -p $(2)/etc/modules-boot.d; \
174 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
175 fi; \
176 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
177 fi; \
178 }; \
179 add_module() { \
180 local priority="$$$$$$$$1"; \
181 local mods="$$$$$$$$2"; \
182 local boot="$$$$$$$$3"; \
183 local mod; \
184 shift 3; \
185 for mod in $$$$$$$$mods; do \
186 mkdir -p $(2)/etc/modules.d; \
187 echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
188 done; \
189 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
190 if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
191 mkdir -p $(2)/etc/modules-boot.d; \
192 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
193 fi; \
194 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
195 fi; \
196 }; \
197 $(3) \
198 if [ -n "$$$$$$$$modules" ]; then \
199 modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
200 mkdir -p $(2)/etc/modules.d; \
201 mkdir -p $(2)/CONTROL; \
202 echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
203 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
204 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
205 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
206 chmod 0755 $(2)/CONTROL/postinst-pkg; \
207 fi
208 endef
209
210 ifeq ($(DUMP)$(TARGET_BUILD),)
211 -include $(LINUX_DIR)/.config
212 endif
213
214 define KernelPackage/depends
215 $(STAMP_BUILT): $(LINUX_DIR)/.config
216 define KernelPackage/depends
217 endef
218 endef
219
220 define KernelPackage
221 NAME:=$(1)
222 $(eval $(call Package/Default))
223 $(eval $(call KernelPackage/Defaults))
224 $(eval $(call KernelPackage/$(1)))
225 $(eval $(call KernelPackage/$(1)/$(BOARD)))
226 $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
227
228 define Package/kmod-$(1)
229 TITLE:=$(TITLE)
230 SECTION:=kernel
231 CATEGORY:=Kernel modules
232 DESCRIPTION:=$(DESCRIPTION)
233 EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
234 VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
235 PKGFLAGS:=$(PKGFLAGS)
236 $(call KernelPackage/$(1))
237 $(call KernelPackage/$(1)/$(BOARD))
238 $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
239 endef
240
241 ifdef KernelPackage/$(1)/conffiles
242 define Package/kmod-$(1)/conffiles
243 $(call KernelPackage/$(1)/conffiles)
244 endef
245 endif
246
247 ifdef KernelPackage/$(1)/description
248 define Package/kmod-$(1)/description
249 $(call KernelPackage/$(1)/description)
250 endef
251 endif
252
253 ifdef KernelPackage/$(1)/config
254 define Package/kmod-$(1)/config
255 $(call KernelPackage/$(1)/config)
256 endef
257 endif
258
259 $(call KernelPackage/depends)
260 $(call KernelPackage/hooks)
261
262 ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
263 ifneq ($(strip $(FILES)),)
264 define Package/kmod-$(1)/install
265 @for mod in $$(call version_filter,$$(FILES)); do \
266 if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
267 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
268 elif [ -e $$$$$$$$mod ]; then \
269 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
270 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
271 else \
272 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
273 exit 1; \
274 fi; \
275 done;
276 $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
277 $(call KernelPackage/$(1)/install,$$(1))
278 endef
279 endif
280 $(if $(CONFIG_PACKAGE_kmod-$(1)),
281 else
282 compile: $(1)-disabled
283 $(1)-disabled:
284 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
285
286 define Package/kmod-$(1)/install
287 true
288 endef
289 )
290 endif
291 $$(eval $$(call BuildPackage,kmod-$(1)))
292
293 $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
294 endef
295
296 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
297
298 define AutoLoad
299 add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
300 endef
301
302 define AutoProbe
303 probe_module "$(call version_filter,$(1))" "$(2)";
304 endef
305
306 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
307 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)) ))
308
309 ifdef DUMP
310 kernel_version_cmp=
311 else
312 kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
313 endif
314
315 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
316
317 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
318 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
319 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
320 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
321 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
322