add support for marking specific kernel module packages as potentially being required...
[openwrt-10.03/.git] / include / kernel.mk
1
2 # Copyright (C) 2006 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 ifeq ($(__target_inc),)
9   include $(INCLUDE_DIR)/target.mk
10 endif
11
12 ifeq ($(DUMP),1)
13   KERNEL?=<KERNEL>
14   BOARD?=<BOARD>
15   LINUX_VERSION?=<LINUX_VERSION>
16 else
17   export GCC_HONOUR_COPTS=s
18
19   ifeq ($(KERNEL),2.6)
20     LINUX_KMOD_SUFFIX=ko
21   else
22     LINUX_KMOD_SUFFIX=o
23   endif
24
25   ifneq (,$(findstring uml,$(BOARD)))
26     KERNEL_CC?=$(HOSTCC)
27     KERNEL_CROSS?=
28   else
29     KERNEL_CC?=$(TARGET_CC)
30     KERNEL_CROSS?=$(TARGET_CROSS)
31   endif
32
33   PATCH_DIR ?= ./patches$(if $(wildcard ./patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER))
34   FILES_DIR ?= $(foreach dir,$(wildcard ./files ./files-$(KERNEL_PATCHVER)),"$(dir)")
35   KERNEL_BUILD_DIR ?= $(BUILD_DIR_BASE)/linux-$(BOARD)$(if $(SUBTARGET),_$(SUBTARGET))$(if $(BUILD_SUFFIX),_$(BUILD_SUFFIX))
36   LINUX_DIR ?= $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)
37
38   MODULES_SUBDIR:=lib/modules/$(LINUX_VERSION)
39   TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)
40
41   LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
42
43   LINUX_SOURCE:=linux-$(LINUX_VERSION).tar.bz2
44   TESTING:=$(if $(findstring -rc,$(LINUX_VERSION)),/testing,)
45   ifeq ($(call qstrip,$(CONFIG_EXTERNAL_KERNEL_TREE)),)
46     LINUX_SITE:=@KERNEL/linux/kernel/v$(KERNEL)$(TESTING)
47   endif
48
49   ifneq ($(TARGET_BUILD),1)
50     PKG_BUILD_DIR ?= $(KERNEL_BUILD_DIR)/$(PKG_NAME)$(if $(PKG_VERSION),-$(PKG_VERSION))
51   endif
52 endif
53
54 ifneq (,$(findstring uml,$(BOARD)))
55   LINUX_KARCH=um
56 else
57   ifeq (,$(LINUX_KARCH))
58     LINUX_KARCH=$(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))))))))))
59   endif
60 endif
61
62
63 define KernelPackage/Defaults
64   FILES:=
65   AUTOLOAD:=
66 endef
67
68 define ModuleAutoLoad
69         export modules=; \
70         add_module() { \
71                 mkdir -p $(2)/etc/modules.d; \
72                 ( \
73                         [ "$$$$$$$$3" = "1" ] && { \
74                                 echo '# May be required for rootfs' ; \
75                         } ; \
76                         for mod in $$$$$$$$2; do \
77                                 getvar mod; \
78                         done \
79                 ) > $(2)/etc/modules.d/$$$$$$$$1-$(1); \
80                 modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$1-$(1)"; \
81         }; \
82         $(3) \
83         if [ -n "$$$$$$$$modules" ]; then \
84                 mkdir -p $(2)/etc/modules.d; \
85                 mkdir -p $(2)/CONTROL; \
86                 echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
87                 echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
88                 echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
89                 echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
90                 chmod 0755 $(2)/CONTROL/postinst; \
91         fi
92 endef
93
94 ifeq ($(DUMP)$(TARGET_BUILD),)
95   -include $(LINUX_DIR)/.config
96 endif
97
98 define KernelPackage/depends
99   $(STAMP_BUILT): $(LINUX_DIR)/.config
100   define KernelPackage/depends
101   endef
102 endef
103
104 define KernelPackage
105   NAME:=$(1)
106   $(eval $(call Package/Default))
107   $(eval $(call KernelPackage/Defaults))
108   $(eval $(call KernelPackage/$(1)))
109   $(eval $(call KernelPackage/$(1)/$(KERNEL)))
110   $(eval $(call KernelPackage/$(1)/$(BOARD)))
111
112   define Package/kmod-$(1)
113     TITLE:=$(TITLE)
114     SECTION:=kernel
115     CATEGORY:=Kernel modules
116     DESCRIPTION:=$(DESCRIPTION)
117     EXTRA_DEPENDS:=kernel (=$(LINUX_VERSION)-$(LINUX_RELEASE))
118     VERSION:=$(LINUX_VERSION)$(if $(PKG_VERSION),+$(PKG_VERSION))-$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
119     $(call KernelPackage/$(1))
120     $(call KernelPackage/$(1)/$(KERNEL))
121     $(call KernelPackage/$(1)/$(BOARD))
122   endef
123
124   ifdef KernelPackage/$(1)/description
125     define Package/kmod-$(1)/description
126 $(call KernelPackage/$(1)/description)
127     endef
128   endif
129
130   ifdef KernelPackage/$(1)/config
131     define Package/kmod-$(1)/config
132 $(call KernelPackage/$(1)/config)
133     endef
134   endif
135
136   $(call KernelPackage/depends)
137
138   ifneq ($(if $(filter-out %=y %=n %=m,$(KCONFIG)),$(filter m,$(foreach c,$(filter-out %=y %=n %=m,$(KCONFIG)),$($(c)))),.),)
139     ifneq ($(strip $(FILES)),)
140       define Package/kmod-$(1)/install
141                   mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
142                   $(CP) -L $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
143                   $(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
144                   $(call KernelPackage/$(1)/install,$$(1))
145       endef
146     endif
147   $(if $(CONFIG_PACKAGE_kmod-$(1)),
148     else
149       compile: kmod-$(1)-unavailable
150       kmod-$(1)-unavailable:
151                 @echo "WARNING: kmod-$(1) is not available in the kernel config"
152   )
153   endif
154   $$(eval $$(call BuildPackage,kmod-$(1)))
155
156   $$(IPKG_kmod-$(1)): $$(wildcard $$(FILES))
157 endef
158
159 define AutoLoad
160   add_module $(1) "$(2)" $(3);
161 endef
162
163 ifdef DUMP
164   CompareKernelPatchVer=0
165 else
166   define CompareKernelPatchVer
167     $(shell [ $$(echo $(1) | tr . 0) -$(2) $$(echo $(3) | tr . 0) ] && echo 1 || echo 0)
168   endef
169 endif
170