openwrt/include/kernel.mk

# 
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
ifeq ($(DUMP),1)
  KERNEL:=<KERNEL>
  BOARD:=<BOARD>
  LINUX_VERSION:=<LINUX_VERSION>
else

  include $(TOPDIR)/.kernel.mk
  include $(INCLUDE_DIR)/target.mk

  # check to see if .kernel.mk matches target.mk
  ifeq ($(CONFIG_BOARD)-$(CONFIG_KERNEL),$(BOARD)-$(KERNEL))
     LINUX_VERSION:=$(CONFIG_LINUX_VERSION)
     LINUX_RELEASE:=$(CONFIG_LINUX_RELEASE)
     LINUX_KARCH:=$(CONFIG_LINUX_KARCH)
  else 
  # oops, old .kernel.config; rebuild it (hiding the misleading errors this produces)
    $(warning rebuilding .kernel.mk)
    $(TOPDIR)/.kernel.mk: FORCE
    ifneq ($(KERNEL_BUILD),1)
      $(TOPDIR)/.kernel.mk:
		@$(MAKE) -C $(TOPDIR)/target/linux/$(BOARD)-$(KERNEL) $@ &>/dev/null
    endif
  endif

  ifeq ($(KERNEL),2.6)
    LINUX_KMOD_SUFFIX=ko
  else
    LINUX_KMOD_SUFFIX=o
  endif

  ifneq (,$(findstring uml,$(BOARD)))
    KERNEL_CC:=$(HOSTCC)
    KERNEL_CROSS:=
  else
    KERNEL_CC:=$(TARGET_CC)
    KERNEL_CROSS:=$(TARGET_CROSS)
  endif

  KERNEL_BUILD_DIR:=$(BUILD_DIR)/linux-$(KERNEL)-$(BOARD)
  LINUX_DIR := $(KERNEL_BUILD_DIR)/linux-$(LINUX_VERSION)

  MODULES_SUBDIR:=lib/modules/$(LINUX_VERSION)
  MODULES_DIR := $(KERNEL_BUILD_DIR)/modules/$(MODULES_SUBDIR)
  TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)

  LINUX_KERNEL:=$(KERNEL_BUILD_DIR)/vmlinux
endif


define KernelPackage/Defaults
  FILES:=
  KCONFIG:=m
  AUTOLOAD:=
endef

define ModuleAutoLoad
	export modules=; \
	add_module() { \
		mkdir -p $(2)/etc/modules.d; \
		( \
			for mod in $$$$$$$$2; do \
				getvar mod; \
			done \
		) > $(2)/etc/modules.d/$$$$$$$$1-$(1); \
		modules="$$$$$$$${modules:+$$$$$$$$modules }$$$$$$$$1-$(1)"; \
	}; \
	$(3) \
	if [ -n "$$$$$$$$modules" ]; then \
		mkdir -p $(2)/etc/modules.d; \
		echo "#!/bin/sh" > $(2)/CONTROL/postinst; \
		echo "[ -z \"\$$$$$$$$IPKG_INSTROOT\" ] || exit 0" >> $(2)/CONTROL/postinst; \
		echo ". /etc/functions.sh" >> $(2)/CONTROL/postinst; \
		echo "load_modules $$$$$$$$modules" >> $(2)/CONTROL/postinst; \
		chmod 0755 $(2)/CONTROL/postinst; \
	fi
endef
 

define KernelPackage
  NAME:=$(1)
  $(eval $(call KernelPackage/Defaults))
  $(eval $(call KernelPackage/$(1)))
  $(eval $(call KernelPackage/$(1)/$(KERNEL)))
  $(eval $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL)))

  define Package/kmod-$(1)
    TITLE:=$(TITLE)
    SECTION:=kernel
    CATEGORY:=Kernel modules
    DEFAULT:=m
    DESCRIPTION:=$(DESCRIPTION)
    EXTRA_DEPENDS:='kernel (=$(PKG_VERSION)-$(PKG_RELEASE))'
    $(call KernelPackage/$(1))
    $(call KernelPackage/$(1)/$(KERNEL))
    $(call KernelPackage/$(1)/$(BOARD)-$(KERNEL))
  endef

  ifeq ($(findstring m,$(KCONFIG)),m)
    ifneq ($(strip $(FILES)),)
      define Package/kmod-$(1)/install
		mkdir -p $$(1)/lib/modules/$(LINUX_VERSION)
		$(CP) $$(FILES) $$(1)/lib/modules/$(LINUX_VERSION)/
		$(call ModuleAutoLoad,$(1),$$(1),$(AUTOLOAD))
		$(call KernelPackage/$(1)/install,$$(1))
      endef
    endif
  endif
  $$(eval $$(call BuildPackage,kmod-$(1)))
endef

define AutoLoad
  add_module $(1) "$(2)";
endef