Root/include/kernel.mk

1#
2# Copyright (C) 2006-2011 OpenWrt.org
3#
4# This is free software, licensed under the GNU General Public License v2.
5# See /LICENSE for more information.
6#
7
8ifeq ($(__target_inc),)
9  include $(INCLUDE_DIR)/target.mk
10endif
11
12ifeq ($(DUMP),1)
13  KERNEL?=<KERNEL>
14  BOARD?=<BOARD>
15  LINUX_VERSION?=<LINUX_VERSION>
16  LINUX_VERMAGIC?=<LINUX_VERMAGIC>
17else
18  ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
19    export GCC_HONOUR_COPTS=s
20  endif
21
22  LINUX_KMOD_SUFFIX=ko
23
24  ifneq (,$(findstring uml,$(BOARD)))
25    KERNEL_CC?=$(HOSTCC)
26    KERNEL_CROSS?=
27  else
28    KERNEL_CC?=$(TARGET_CC)
29    KERNEL_CROSS?=$(TARGET_CROSS)
30  endif
31
32  ifeq ($(TARGET_BUILD),1)
33    PATCH_DIR ?= ./patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
34    FILES_DIR ?= $(foreach dir,$(wildcard ./files ./files-$(KERNEL_PATCHVER)),"$(dir)")
35  endif
36  KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
37  LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
38
39  LINUX_VERMAGIC:=$(strip $(shell cat $(LINUX_DIR)/.vermagic 2>/dev/null))
40  LINUX_VERMAGIC:=$(if $(LINUX_VERMAGIC),$(LINUX_VERMAGIC),unknown)
41
42  LINUX_UNAME_VERSION:=$(if $(word 3,$(subst ., ,$(KERNEL_BASE))),$(KERNEL_BASE),$(KERNEL_BASE).0)
43  ifneq ($(findstring -rc,$(LINUX_VERSION)),)
44    LINUX_UNAME_VERSION:=$(LINUX_UNAME_VERSION)-$(strip $(lastword $(subst -, ,$(LINUX_VERSION))))
45  endif
46
47  MODULES_SUBDIR:=lib/modules/$(LINUX_UNAME_VERSION)
48  TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
49
50  LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
51
52  LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
53  TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
54  ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE))$(call qstrip,$(CONFIG_KERNEL_GIT_CLONE_URI)),)
55    ifeq ($(word 1,$(subst ., ,$(KERNEL_BASE))),3)
56      LINUX_SITE:=@KERNEL/linux/kernel/v3.x$(TESTING)
57    else
58      LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING)
59    endif
60  endif
61
62  ifneq ($(TARGET_BUILD),1)
63    PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
64  endif
65endif
66
67ifneq (,$(findstring uml,$(BOARD)))
68  LINUX_KARCH=um
69else
70  ifeq (,$(LINUX_KARCH))
71    LINUX_KARCH=$(strip $(subst i386,x86,$(subst armeb,arm,$(subst mipsel,mips,$(subst mips64,mips,$(subst mips64el,mips,$(subst sh2,sh,$(subst sh3,sh,$(subst sh4,sh,$(ARCH))))))))))
72  endif
73endif
74
75
76define KernelPackage/Defaults
77  FILES:=
78  AUTOLOAD:=
79endef
80
81define ModuleAutoLoad
82    $(SH_FUNC) \
83    export modules=; \
84    add_module() { \
85        priority="$$$$$$$$1"; \
86        mods="$$$$$$$$2"; \
87        boot="$$$$$$$$3"; \
88        shift 3; \
89        for mod in $$$$$$$$mods; do \
90            if [ -e $(2)/$(MODULES_SUBDIR)/$$$$$$$$mod.ko ]; then \
91                mkdir -p $(2)/etc/modules.d; \
92                echo "$$$$$$$$mod" >> $(2)/etc/modules.d/$$$$$$$$priority-$(1); \
93            fi; \
94        done; \
95        if [ -e $(2)/etc/modules.d/$$$$$$$$priority-$(1) ]; then \
96            if [ "$$$$$$$$boot" = "1" ]; then \
97                mkdir -p $(2)/etc/modules-boot.d; \
98                ln -s ../modules.d/$$$$$$$$priority-$(1) $(2)/etc/modules-boot.d/; \
99            fi; \
100            modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$priority-$(1)"; \
101        fi; \
102    }; \
103    $(3) \
104    if [ -n "$$$$$$$$modules" ]; then \
105        mkdir -p $(2)/etc/modules.d; \
106        mkdir -p $(2)/CONTROL; \
107        echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
108        echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
109        echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
110        echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
111        chmod 0755 $(2)/CONTROL/postinst; \
112    fi
113endef
114
115ifeq ($(DUMP)$(TARGET_BUILD),)
116  -include $(LINUX_DIR)/.config
117endif
118
119define KernelPackage/depends
120  $(STAMP_BUILT): $(LINUX_DIR)/.config
121  define KernelPackage/depends
122  endef
123endef
124
125define KernelPackage
126  NAME:=$(1)
127  $(eval $(call Package/Default))
128  $(eval $(call KernelPackage/Defaults))
129  $(eval $(call KernelPackage/$(1)))
130  $(eval $(call KernelPackage/$(1)/$(BOARD)))
131
132  define Package/kmod-$(1)
133    TITLE:=$(TITLE)
134    SECTION:=kernel
135    CATEGORY:=Kernel modules
136    DESCRIPTION:=$(DESCRIPTION)
137    EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE)-$(LINUX_VERMAGIC))
138    VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
139    $(call KernelPackage/$(1))
140    $(call KernelPackage/$(1)/$(BOARD))
141  endef
142
143  ifdef KernelPackage/$(1)/description
144    define Package/kmod-$(1)/description
145$(call KernelPackage/$(1)/description)
146    endef
147  endif
148
149  ifdef KernelPackage/$(1)/config
150    define Package/kmod-$(1)/config
151$(call KernelPackage/$(1)/config)
152    endef
153  endif
154
155  $(call KernelPackage/depends)
156
157  ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m y,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
158    ifneq ($(strip $(FILES)),)
159      define Package/kmod-$(1)/install
160          @for mod in $$(FILES); do \
161            if [ -e $$$$$$$$mod ]; then \
162                mkdir -p $$(1)/$(MODULES_SUBDIR) ; \
163                $(CP) -L $$$$$$$$mod $$(1)/$(MODULES_SUBDIR)/ ; \
164            elif [ -e "$(LINUX_DIR)/modules.builtin" ]; then \
165                if grep -q "$$$$$$$${mod##$(LINUX_DIR)/}" "$(LINUX_DIR)/modules.builtin"; then \
166                    echo "NOTICE: module '$$$$$$$$mod' is built-in."; \
167                else \
168                    echo "ERROR: module '$$$$$$$$mod' is missing."; \
169                    exit 1; \
170                fi; \
171            else \
172                echo "WARNING: module '$$$$$$$$mod' missing and modules.builtin not available, assuming built-in."; \
173            fi; \
174          done;
175          $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
176          $(call KernelPackage/$(1)/install,$$(1))
177      endef
178    endif
179  $(if $(CONFIG_PACKAGE_kmod-$(1)),
180    else
181      compile: kmod-$(1)-unavailable
182      kmod-$(1)-unavailable:
183        @echo "WARNING: kmod-$(1) is not available in the kernel config"
184  )
185  endif
186  $$(eval $$(call BuildPackage,kmod-$(1)))
187
188  $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
189endef
190
191define AutoLoad
192  add_module "$(1)" "$(2)" "$(3)";
193endef
194
195version_field=$(if $(word $(1),$(2)),$(word $(1),$(2)),0)
196kernel_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)) ))
197
198ifdef DUMP
199  kernel_version_cmp=
200else
201  kernel_version_cmp=$(shell [ $(call kernel_version_merge,$(call split_version,$(2))) $(1) $(call kernel_version_merge,$(call split_version,$(3))) ] && echo 1 )
202endif
203
204CompareKernelPatchVer=$(if $(call kernel_version_cmp,-$(2),$(1),$(3)),1,0)
205
206kernel_patchver_gt=$(call kernel_version_cmp,-gt,$(KERNEL_PATCHVER),$(1))
207kernel_patchver_ge=$(call kernel_version_cmp,-ge,$(KERNEL_PATCHVER),$(1))
208kernel_patchver_eq=$(call kernel_version_cmp,-eq,$(KERNEL_PATCHVER),$(1))
209kernel_patchver_le=$(call kernel_version_cmp,-le,$(KERNEL_PATCHVER),$(1))
210kernel_patchver_lt=$(call kernel_version_cmp,-lt,$(KERNEL_PATCHVER),$(1))
211
212

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