464c94572e9c67d24a6de46f8db1babc6b4d9dc7
[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 $(LINUX_DIR)/include/config/kernel.release))
68 endif
69
70 MODULES_SUBDIR:=lib/modules/$(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 KERNELRELEASE=$(LINUX_VERSION) \
112 cmd_syscalls=
113
114 ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
115 KERNEL_MAKEOPTS += \
116 KERNELRELEASE=$(LINUX_VERSION)
117 endif
118
119 KERNEL_MAKEOPTS := -C $(LINUX_DIR) $(KERNEL_MAKE_FLAGS)
120
121 ifdef CONFIG_USE_SPARSE
122 KERNEL_MAKEOPTS += C=1 CHECK=$(STAGING_DIR_HOST)/bin/sparse
123 endif
124
125 define KernelPackage/Defaults
126 FILES:=
127 AUTOLOAD:=
128 PKGFLAGS+=nonshared
129 endef
130
131 define ModuleAutoLoad
132 $(SH_FUNC) \
133 export modules=; \
134 probe_module() { \
135 local mods="$$$$$$$$1"; \
136 local boot="$$$$$$$$2"; \
137 local mod; \
138 shift 2; \
139 for mod in $$$$$$$$mods; do \
140 mkdir -p $(2)/etc/modules.d; \
141 echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$(1); \
142 done; \
143 if [ -e $(2)/etc/modules.d/$(1) ]; then \
144 if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$(1) ]; then \
145 mkdir -p $(2)/etc/modules-boot.d; \
146 ln -s ../modules.d/$(1) $(2)/etc/modules-boot.d/; \
147 fi; \
148 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$mods"; \
149 fi; \
150 }; \
151 add_module() { \
152 local priority="$$$$$$$$1"; \
153 local mods="$$$$$$$$2"; \
154 local boot="$$$$$$$$3"; \
155 local mod; \
156 shift 3; \
157 for mod in $$$$$$$$mods; do \
158 mkdir -p $(2)/etc/modules.d; \
159 echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
160 done; \
161 if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
162 if [ "$$$$$$$$boot" = "1" -a ! -e $(2)/etc/modules-boot.d/$$$$$$$$priority-$(1) ]; then \
163 mkdir -p $(2)/etc/modules-boot.d; \
164 ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
165 fi; \
166 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
167 fi; \
168 }; \
169 $(3) \
170 if [ -n "$$$$$$$$modules" ]; then \
171 modules="$$$$$$$$(echo "$$$$$$$$modules" | tr ' ' '\n' | sort | uniq | paste -s -d' ' -)"; \
172 mkdir -p $(2)/etc/modules.d; \
173 mkdir -p $(2)/CONTROL; \
174 echo "#!/bin/sh" > $(2)/CONTROL/postinst-pkg; \
175 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst-pkg; \
176 echo ". /lib/functions.sh" >> $(2)/CONTROL/postinst-pkg; \
177 echo "insert_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst-pkg; \
178 chmod 0755 $(2)/CONTROL/postinst-pkg; \
179 fi
180 endef
181
182 ifeq ($(DUMP)$(TARGET_BUILD),)
183 -include $(LINUX_DIR)/.config
184 endif
185
186 define KernelPackage/depends
187 $(STAMP_BUILT): $(LINUX_DIR)/.config
188 define KernelPackage/depends
189 endef
190 endef
191
192 define KernelPackage
193 NAME:=$(1)
194 $(eval $(call Package/Default))
195 $(eval $(call KernelPackage/Defaults))
196 $(eval $(call KernelPackage/$(1)))
197 $(eval $(call KernelPackage/$(1)/$(BOARD)))
198 $(eval $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic)))
199
200 define Package/kmod-$(1)
201 TITLE:=$(TITLE)
202 SECTION:=kernel
203 CATEGORY:=Kernel modules
204 DESCRIPTION:=$(DESCRIPTION)
205 EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
206 VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
207 PKGFLAGS:=$(PKGFLAGS)
208 $(call KernelPackage/$(1))
209 $(call KernelPackage/$(1)/$(BOARD))
210 $(call KernelPackage/$(1)/$(BOARD)/$(if $(SUBTARGET),$(SUBTARGET),generic))
211 endef
212
213 ifdef KernelPackage/$(1)/conffiles
214 define Package/kmod-$(1)/conffiles
215 $(call KernelPackage/$(1)/conffiles)
216 endef
217 endif
218
219 ifdef KernelPackage/$(1)/description
220 define Package/kmod-$(1)/description
221 $(call KernelPackage/$(1)/description)
222 endef
223 endif
224
225 ifdef KernelPackage/$(1)/config
226 define Package/kmod-$(1)/config
227 $(call KernelPackage/$(1)/config)
228 endef
229 endif
230
231 $(call KernelPackage/depends)
232
233 ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
234 ifneq ($(strip $(FILES)),)
235 define Package/kmod-$(1)/install
236 @for mod in $$(call version_filter,$$(FILES)); do \
237 if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
238 echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
239 elif [ -e $$$$$$$$mod ]; then \
240 mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
241 $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
242 else \
243 echo "ERROR: module '$$$$$$$$mod' is missing." >&2; \
244 exit 1; \
245 fi; \
246 done;
247 $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
248 $(call KernelPackage/$(1)/install,$$(1))
249 endef
250 endif
251 $(if $(CONFIG_PACKAGE_kmod-$(1)),
252 else
253 compile: $(1)-disabled
254 $(1)-disabled:
255 @echo "WARNING: kmod-$(1) is not available in the kernel config - generating empty package" >&2
256
257 define Package/kmod-$(1)/install
258 true
259 endef
260 )
261 endif
262 $$(eval $$(call BuildPackage,kmod-$(1)))
263
264 $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
265 endef
266
267 version_filter=$(if $(findstring @,$(1)),$(shell $(SCRIPT_DIR)/package-metadata.pl version_filter $(KERNEL_PATCHVER) $(1)),$(1))
268
269 define AutoLoad
270 add_module "$(1)" "$(call version_filter,$(2))" "$(3)";
271 endef
272
273 define AutoProbe
274 probe_module "$(call version_filter,$(1))" "$(2)";
275 endef
276
277 version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
278 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)) ))
279
280 ifdef DUMP
281 kernel_version_cmp=
282 else
283 kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
284 endif
285
286 CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
287
288 kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
289 kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
290 kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
291 kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
292 kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
293