kernel: Update Makefile and create Kbuild for kernel compilation.

b53f3835 · Miguel Jimenez Lopez · e51e1d42 · b53f3835 · b53f3835
Commit b53f3835 authored Apr 04, 2019 by Miguel Jimenez Lopez
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Kbuild sw/kernel/Kbuild +34 -0

Makefile sw/kernel/Makefile +19 -25

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--- a/sw/kernel/Kbuild
+++ b/sw/kernel/Kbuild
+KBUILD_EXTRA_SYMBOLS := $(FMC_BUS_ABS)/kernel/Module.symvers
+
+# add versions of supermodule. It is useful when spec-sw is included as sub-module
+# of a bigger project that we want to track
+ifdef CONFIG_SUPER_REPO
+ifdef CONFIG_SUPER_REPO_VERSION
+SUBMODULE_VERSIONS += MODULE_INFO(version_$(CONFIG_SUPER_REPO),\"$(CONFIG_SUPER_REPO_VERSION)\");
+endif
+endif
+# add versions of used submodules
+SUBMODULE_VERSIONS += MODULE_INFO(version_fmc_bus,\"$(FMC_BUS_VERSION)\");
+
+ccflags-y += -DADDITIONAL_VERSIONS="$(SUBMODULE_VERSIONS)"
+
+# The library includes <sdb.h>, so point -I directtly there
+# include our header before to avoid conflicts with the kernel
+LINUXINCLUDE :=  -I$(FMC_BUS_ABS)/kernel/include -I$(src)/include/linux $(LINUXINCLUDE)
+ccflags-y += -I$(src)/include
+ccflags-y += $(WR_NIC_CFLAGS)
+ccflags-y += -DGIT_VERSION=\"$(GIT_VERSION)\"
+
+# FIXME: Node or switch?
+ccflags-y += -DWR_NODE
+#ccflags-y += -DWR_SWITCH
+
+obj-m += wr-nic.o
+
+wr-nic-y = module.o
+wr-nic-y += device.o
+wr-nic-y += nic-core.o
+wr-nic-y += endpoint.o
+wr-nic-y += ethtool.o
+wr-nic-y += pps.o
+wr-nic-y += timestamp.o
--- a/sw/kernel/Makefile
+++ b/sw/kernel/Makefile
-# This Makefile is meant to be used by the wr-switch. When built for wr-node
-# the relevant Makefile lived in the parent directory.
+# include parent_common.mk for buildsystem's defines
+#use absolute path for REPO_PARENT
+REPO_PARENT=$(shell /bin/pwd)/../..
+-include $(REPO_PARENT)/parent_common.mk

-ccflags-y += -DWR_SWITCH
+LINUX ?= /lib/modules/$(shell uname -r)/build

-obj-m := wr-nic.o
-wr-nic-objs := module.o device.o nic-core.o endpoint.o ethtool.o \
-		pps.o timestamp.o
+# by default use the fmc-bus within the repository
+FMC_BUS ?= ../fmc-bus/
+# FMC_BUS_ABS has to be absolut path, due to beeing passed to the Kbuild
+FMC_BUS_ABS ?= $(abspath $(FMC_BUS) )

-# accept WRN_DEBUG from the environment. It turns pr_debug() into printk.
-ifdef WRN_DEBUG
-	ccflags-y += -DDEBUG
-endif
+GIT_VERSION ?= $(shell git describe --dirty --long --tags)
+export GIT_VERSION

-ccflags-y += -I$(src)/../wr_pstats
-
-# What follows is standard stuff
-export ARCH ?= arm
-export CROSS_COMPILE ?= $(CROSS_COMPILE_ARM)
+FMC_BUS_VERSION ?= $(shell cd $(FMC_BUS_ABS); git describe --always --dirty --long --tags)
+export FMC_BUS_VERSION

 all modules:
-	$(MAKE) CONFIG_DEBUG_SECTION_MISMATCH=y \
-		-C $(LINUX) SUBDIRS=$(shell /bin/pwd) modules
+	$(MAKE) -C $(LINUX) M=$(shell /bin/pwd) FMC_BUS_ABS=$(FMC_BUS_ABS) modules

-# looking at preprocessed output is helpful for bug hunting
-preprocess:
-	$(MAKE) CONFIG_DEBUG_SECTION_MISMATCH=y \
-		-C $(LINUX) SUBDIRS=$(shell /bin/pwd) $(wr-nic-objs:.o=.i)
+install modules_install:
+	$(MAKE) -C $(LINUX) M=$(shell /bin/pwd) modules_install

-# We might "$(MAKE) -C $(LINUX)" but "make clean" with no LINUX defined
-# is sometimes useful to have
+# be able to run the "clean" rule even if $(LINUX) is not valid
 clean:
-	rm -f *.mod.c *.o *.ko *.i .*cmd Module.symvers modules.order *~
-	rm -rf .tmp_versions
+	rm -rf *.o *~  .*.cmd *.ko *.mod.c .tmp_versions Module.symvers \
+		Module.markers modules.order