source: freewrt/mk/kernel.mk@ 655dec8

# $FreeWRT$
#-
# This file is part of the FreeWRT project. FreeWRT is copyrighted
# material, please see the LICENCE file in the top-level directory
# or at http://www.freewrt.org/licence for details.


KERNEL:=unknown
ifneq (,$(findstring 2.4.,$(LINUX_VERSION)))
KERNEL:=2.4
endif
ifneq (,$(findstring 2.6.,$(LINUX_VERSION)))
KERNEL:=2.6
endif

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

MODULES_SUBDIR := lib/modules/$(LINUX_VERSION)
LINUX_BUILD_DIR := $(BUILD_DIR)/linux-$(KERNEL)-$(BOARD)
LINUX_DIR := $(LINUX_BUILD_DIR)/linux-$(LINUX_VERSION)
LINUX_KERNEL := $(LINUX_BUILD_DIR)/vmlinux
LINUX_TARGET_DIR := $(LINUX_BUILD_DIR)/root

IPKG_KERNEL:=   env \
                IPKG_TMP=$(BUILD_DIR)/tmp \
                IPKG_INSTROOT=$(LINUX_TARGET_DIR) \
                IPKG_CONF_DIR=$(LINUX_BUILD_DIR) \
                IPKG_OFFLINE_ROOT=$(LINUX_BUILD_DIR)/root \
                ${BASH} ${SCRIPT_DIR}/ipkg -force-defaults -force-depends

LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
        -e 's/mipsel/mips/' \
        -e 's/mipseb/mips/' \
        -e 's/powerpc/ppc/' \
        -e 's/sh[234]/sh/' \
        -e 's/armeb/arm/' \
)

KPKG_MAKEOPTS := IPKG="$(IPKG_KERNEL)" \
                BOARD="$(BOARD)" \
                KERNEL="$(KERNEL)" \
                TARGET_DIR="$(LINUX_TARGET_DIR)" \
                LINUX_BUILD_DIR="$(LINUX_BUILD_DIR)" \
                LINUX_DIR="$(LINUX_DIR)" \
                LINUX_VERSION="$(LINUX_VERSION)" \
                LINUX_RELEASE="$(LINUX_RELEASE)"

KMOD_BUILD_DIR := $(LINUX_BUILD_DIR)/linux-modules
MODULES_DIR := $(LINUX_BUILD_DIR)/modules/$(MODULES_SUBDIR)
TARGET_MODULES_DIR := $(LINUX_TARGET_DIR)/$(MODULES_SUBDIR)

KERNEL_IPKG:=$(PACKAGE_DIR)/kernel_$(BOARD)-$(KERNEL)-$(LINUX_VERSION)_$(ARCH).ipk
INSTALL_TARGETS:= $(KERNEL_IPKG)
TARGETS:=

# KMOD_template
#
# Adds a target for creating a package containing
# the specified (kernel-provided) modules.
# Parameters:
# 1: the config symbol name (without leading 'FWRT_PACKAGE_KMOD_') this module depends on
# 2: the name for the package, should be unique
# 3: actual modules to add; absolute path inside $(MODULES_DIR)
#    OMIT THE KERNEL-SPECIFIC EXTENSION!
# 4: this is weird - the name of the kernel's config symbol for the module(s) in $(3)
#    actually this detects if the module is built in or not
# 5: the packages this package depends on - normally there are none
# 6: together with $(2) forms the name of the file inside /etc/modules.d that controls
#    order of module loading at system startup; the modules in $(3) are (in their order)
#    added to this file, if $(6) is non-empty
# 7: a custom command that is run before actually building the module - as nobody
#    needs this, you probably won't either
#
define KMOD_template
ifeq ($$(strip $(4)),)
KDEPEND_$(1):=m
else
KDEPEND_$(1):=$($(4))
endif

IDEPEND_$(1):=kernel ($(BOARD)-$(KERNEL)-$(LINUX_VERSION)) $(foreach pkg,$(5),", $(pkg)")

PKG_$(1) := $(PACKAGE_DIR)/kmod-$(2)_$(LINUX_VERSION)-$(BOARD)-$(LINUX_RELEASE)_$(ARCH).ipk
I_$(1) := $(KMOD_BUILD_DIR)/ipkg/$(2)

ifeq ($$(KDEPEND_$(1)),m)
TARGETS+=$$(PKG_$(1))
ifeq ($$(FWRT_PACKAGE_KMOD_$(1)),y)
INSTALL_TARGETS+=$$(PKG_$(1))
endif
endif

$$(PKG_$(1)): $(LINUX_DIR)/.modules-install
        rm -rf $$(I_$(1))
        ${BASH} ${SCRIPT_DIR}/make-ipkg-dir.sh $$(I_$(1)) \
            ../control/kmod-$(2).control \
            $(LINUX_VERSION)-$(BOARD)-$(LINUX_RELEASE) $(ARCH)
        echo "Depends: $$(IDEPEND_$(1))" >> $$(I_$(1))/CONTROL/control
ifneq ($(strip $(3)),)
        mkdir -p $$(I_$(1))/lib/modules/$(LINUX_VERSION)
        $(CP) $(foreach mod,$(3),$(mod).$(LINUX_KMOD_SUFFIX)) $$(I_$(1))/lib/modules/$(LINUX_VERSION)
ifneq ($(6),)
        mkdir -p $$(I_$(1))/etc/modules.d
        for module in $(notdir $(3)); do \
                echo $$$$module >> $$(I_$(1))/etc/modules.d/$(6)-$(2); \
        done
        echo "#!/bin/sh" >> $$(I_$(1))/CONTROL/postinst
        echo "if [ -z \"\$$$${IPKG_INSTROOT}\" ]; then" >> $$(I_$(1))/CONTROL/postinst
        echo ". /etc/functions.sh" >> $$(I_$(1))/CONTROL/postinst
        echo "load_modules /etc/modules.d/$(6)-$(2)" >> $$(I_$(1))/CONTROL/postinst
        echo "fi" >> $$(I_$(1))/CONTROL/postinst
        chmod 0755 $$(I_$(1))/CONTROL/postinst
endif
endif
        $(7)
        $(IPKG_BUILD) $$(I_$(1)) $(PACKAGE_DIR) $(MAKE_TRACE)
endef

# include kernel filesystem specific kernel configuration
include ./$(FS)/kernelconfig