USE_LLVM	:= 0
CROSS_GCC	:= arm-none-eabi-
ifeq ($(USE_LLVM),1)
	COMPILER	:= LLVM=1
else
	COMPILER	:= CROSS_COMPILE=$(CROSS_GCC)
endif
PATCHDIR	:= ${HOME}/linux-stericsson
build_dir       := $(CURDIR)/build-gemini
output_dir	:= $(HOME)
rootfs		:= $(HOME)/rootfs-gemini.cpio
rootfsbase	:= $(shell basename $(rootfs))
install_dir     := $(build_dir)/install
tftp_dir	:= /var/lib/tftpboot
nfs_dir		:= /mnt/storage/nfsroot/gemini
config_file     := $(build_dir)/.config
strip		:= $(CROSS_COMPILE)strip
objcopy		:= $(CROSS_COMPILE)objcopy
makejobs	:= $(shell grep '^processor' /proc/cpuinfo | sort -u | wc -l)
makethreads	:= $(shell dc -e "$(makejobs) 1 + p")
#variant	:= sq201
#variant	:= sl93512r
#variant	:= dlink-dir-685
variant	:= dlink-dns-313
#variant	:= nas4220b
dtb		:= $(build_dir)/arch/arm/boot/dts/gemini/gemini-$(variant).dtb

cmdline		:= "console=ttyS0,19200n8 fotg210-udc,g_serial"

make_parallel	:= -j$(makethreads) -l$(makejobs)
make_options := -f Makefile \
                ARCH=arm \
		$(make_parallel) \
                $(COMPILER) \
                KBUILD_OUTPUT=$(build_dir)
# make_flags	:= CONFIG_DEBUG_SECTION_MISMATCH=y

.PHONY: help
help:
	@echo "****  Common Makefile  ****"
	@echo "make config - configure the kernel"
	@echo "make build - build the kernel and produce a RAMdisk image"
	@echo
	@echo "example:"
	@echo "make -f gemini.mak config"
	@echo "make -f gemini.mak build"

.PHONY: have-rootfs
have-rootfs:
	@if [ ! -f $(rootfs) ] ; then \
	     echo "ERROR: no rootfs at $(rootfs)" ; \
	     echo "This is needed to boot the system." ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	else \
	     echo "Rootfs available at $(rootfs)" ; \
	fi

.PHONY: have-crosscompiler
have-crosscompiler:
	@if [ $(USE_LLVM) -eq 1 ] ; then \
	   echo "LLVM OK" ; \
	else \
	   echo -n "Check that $(CROSS_COMPILE)gcc is available..." ; \
	   which $(CROSS_COMPILE)gcc > /dev/null ; \
	   if [ ! $$? -eq 0 ] ; then \
	      echo "ERROR: cross-compiler $(CROSS_COMPILE)gcc not in PATH=$$PATH!" ; \
	      echo "ABORTING." ; \
	      exit 1 ; \
	   else \
	      echo "OK" ;\
	   fi \
	fi

config-base: FORCE
	@mkdir -p $(build_dir)
	$(MAKE) $(make_options) gemini_defconfig

config-initramfs: have-rootfs config-base FORCE
	@cp $(rootfs) $(build_dir)/$(rootfsbase)
	# Configure in the initramfs
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable BLK_DEV_INITRD \
	--set-str INITRAMFS_SOURCE $(rootfsbase) \
	--enable RD_GZIP \
	--enable INITRAMFS_COMPRESSION_GZIP

config-openwrt: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable PARTITION_ADVANCED \
	--enable EXT4_FS \
	--enable EXT4_POSIX_ACL \
	--enable MTD_ROOTFS_ROOT_DEV \
	--enable MTD_SPLIT \
	--set-str MTD_SPLIT_FIRMWARE_NAME firmware \
	--enable MTD_SPLIT_SQUASHFS_ROOT \
	--enable MTD_SPLIT_SUPPORT \
	--enable SQUASHFS \
	--enable SQUASHFS_XZ \
	--enable OVERLAY_FS \
	--enable DEVTMPFS \
	--enable CGROUPS \
	--enable INOTIFY_USER \
	--enable SIGNALFD \
	--enable TIMERFD \
	--enable EPOLL \
	--enable NET \
	--enable UNIX \
	--enable SYSFS

config-nas-features: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable CIFS \
	--enable CIFS_SMB2 \
	--enable TUN

# Config options needed to bring up rootfs on distros
config-distro: config-base config-openwrt
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable PARTITION_ADVANCED \
	--enable LDM_PARTITION \
	--enable MSDOS_PARTITION \
	--enable EXT4_FS \
	--enable EXT4_POSIX_ACL \
	--enable DEVTMPFS \
	--enable CGROUPS \
	--enable INOTIFY_USER \
	--enable SIGNALFD \
	--enable TIMERFD \
	--enable EPOLL \
	--enable NET \
	--enable SYSFS \
	--disable SYSFS_DEPRECATED \
	--enable PROC_FS \
	--enable FHANDLE \
	--enable TMPFS_XATTR \
	--enable TMPFS_POSIX_ACL \
	--enable CGROUP_SCHED \
	--enable FAIR_GROUP_SCHED \
	--enable CFS_BANDWIDTH \
	--disable RT_GROUP_SCHED \
	--enable SECCOMP \
	--enable SECCOMP_FILTER \
	--enable CHECKPOINT_RESTORE \
	--enable CGROUP_FREEZER \
	--enable CGROUP_DEVICE \
	--enable CPUSETS \
	--enable PROC_PID_CPUSET \
	--enable CGROUP_CPUACCT \
	--enable RESOURCE_COUNTERS \
	--enable CGROUP_MEM_RES_CTLR \
	--enable CGROUP_MEM_RES_CTLR_DISABLED \
	--enable CGROUP_MEM_RES_CTLR_SWAP \
	--enable CGROUP_SCHED \
	--enable FAIR_GROUP_SCHED \
	--enable BLK_CGROUP \
	--enable NAMESPACES \
	--enable SCHED_AUTOGROUP \
	--enable FHANDLE \
	--enable SWAP \
	--enable AUTOFS4_FS \
	--enable BSD_PROCESS_ACCT \
	--enable BSD_PROCESS_ACCT_V3 \
	--enable TASKSTATS \
	--enable TASK_DELAY_ACCT \
	--enable TASK_XACCT \
	--enable TASK_IO_ACCOUNTING \
	--enable BUILD_BIN2C \
	--enable IKCONFIG \
	--enable IKCONFIG_PROC \
	--enable PAGE_COUNTER \
	--enable MEMCG \
	--enable MEMCG_SWAP \
	--enable MEMCG_SWAP_ENABLED \
	--enable MEMCG_KMEM \
	--enable CGROUP_PERF \
	--enable CGROUP_WRITEBACK \
	--enable USER_NS \
	--enable BLK_DEV_BSG \
	--enable BLK_DEV_BSGLIB \
	--enable BLK_DEV_INTEGRITY \
	--enable NET_INGRESS \
	--enable IP_ADVANCED_ROUTER \
	--set-str UEVENT_HELPER_PATH "" \
	--enable WANT_DEV_COREDUMP \
	--enable DEV_COREDUMP \
	--enable CHR_DEV_SG \
	--enable KEYS \
	--enable ENCRYPTED_KEYS \
	--enable SECURITY \
	--enable SECURITYFS \
	--enable SECURITY_NETWORK \
	--enable SECURITY_NETWORK_XFRM \
	--enable SECURITY_PATH \
	--enable INTEGRITY \
	--enable CRYPTO_USER_API \
	--enable CRYPTO_USER_API_HASH \
	--enable CRYPTO_USER_API_SKCIPHER \
	--enable CRYPTO_USER_API_AEAD \
	--enable ARM_CRYPTO \
	--enable CRYPTO_SHA1_ARM \
	--enable CRYPTO_SHA256_ARM \
	--enable CRYPTO_SHA512_ARM \
	--enable CRYPTO_AES_ARM \
	--enable BINARY_PRINTF \
	--enable MD \
	--enable BLK_DEV_DM_BUILTIN \
	--enable BLK_DEV_DM \
	--enable DM_CRYPT \
	--enable DM_UEVENT \
	--enable SCSI \
	--enable USB_STORAGE

config-earlydebug: config-base FORCE
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_KERNEL \
	--enable DEBUG_LL \
	--enable EARLY_PRINTK \
	--set-str CMDLINE "earlyprintk"

config-multiplatform: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--disable ARCH_MULTI_V7 \
	--disable ARCH_MULTI_V6 \
	--disable ARCH_MULTI_V5 \
	--enable ARCH_MULTI_V4 \
	--enable ARCH_GEMINI

config-storage: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable PARTITION_ADVANCED \
	--enable LDM_PARTITION \
	--enable MSDOS_PARTITION \
	--enable EXT4_FS \
	--enable EXT4_USE_FOR_EXT2 \
	--enable FAT_FS \
	--enable VFAT_FS

config-gemini-features: config-base config-multiplatform
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable PREEMPT \
	--enable NO_HZ_IDLE \
	--enable DEVTMPFS \
	--enable NEW_LEDS \
	--enable LEDS_CLASS \
	--enable LEDS_GPIO \
	--enable LEDS_TRIGGERS \
	--enable LEDS_TRIGGER_HEARTBEAT \
	--enable SERIAL_OF_PLATFORM \
	--enable INPUT \
	--disable INPUT_MOUSEDEV \
	--disable INPUT_MOUSEDEV_PSAUX \
	--enable INPUT_EVDEV \
	--enable INPUT_KEYBOARD \
	--enable KEYBOARD_GPIO \
	--enable RTC_CLASS \
	--enable RTC_DRV_GEMINI \
	--enable MTD \
	--enable MTD_OF_PARTS \
	--enable MTD_PHYSMAP \
	--enable MTD_PHYSMAP_OF \
	--enable MTD_CFI \
	--enable MTD_OTP \
	--enable MTD_CFI_INTELEXT \
	--enable MTD_CFI_AMDSTD \
	--enable MTD_CFI_STAA \
	--enable WATCHDOG \
	--enable PCI \
	--enable ATA \
	--enable ATA_BMDMA \
	--enable PATA_FTIDE010 \
	--enable AMBA_PL08X \
	--enable DMATEST \
	--enable CMA \
	--disable CMA_SIZE_SEL_MBYTES \
	--enable CMA_SIZE_SEL_PERCENTAGE \
	--enable DRM \
	--enable DRM_TVE200 \
	--enable FB \
	--enable FRAMEBUFFER_CONSOLE \
	--enable LOGO \
	--enable NET_VENDOR_CORTINA \
	--enable GEMINI_ETHERNET \
	--enable HIGH_RES_TIMERS \
	--enable UNIX \
	--enable HIGHMEM \
	--enable CRYPTO_HW \
	--enable CRYPTO_DEV_SL3516 \
	--enable DEBUG_FS

config-sq201-features: config-base config-multiplatform config-gemini-features
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable USB_EHCI_HCD \
	--enable EHCI_ROOT_HUB_TT \
	--enable USB_EHCI_PCI \
	--enable USB_UHCI_HCD \
	--enable PHYLIB \
	--enable MDIO_BITBANG \
	--enable MDIO_GPIO \
	--enable MARVELL_PHY \
	--enable SPI \
	--enable SPI_MASTER \
	--enable SPI_GPIO \
	--enable HAVE_NET_DSA \
	--enable NET_DSA \
	--enable NET_DSA_VITESSE_VSC73XX \
	--enable BRIDGE \
	--enable VLAN_8021Q \
	--enable BRIDGE_VLAN_FILTERING \
	--enable WIRELESS \
	--enable CFG80211 \
	--enable MAC80211 \
	--enable CFG80211_WEXT \
	--enable NETDEVICES \
	--enable NET_CORE \
	--enable WLAN \
	--enable WLAN_VENDOR_RALINK \
	--disable USB_NET_DRIVERS \
	--disable WLAN_VENDOR_ADMTEK \
	--disable WLAN_VENDOR_ATH \
	--disable WLAN_VENDOR_ATMEL \
	--disable WLAN_VENDOR_BROADCOM \
	--disable WLAN_VENDOR_CISCO \
	--disable WLAN_VENDOR_INTEL \
	--disable WLAN_VENDOR_INTERSIL \
	--disable WLAN_VENDOR_MARVELL \
	--disable WLAN_VENDOR_MEDIATEK \
	--enable WLAN_VENDOR_RALINK \
	--enable RT2X00 \
	--enable RT61PCI \
	--disable WLAN_VENDOR_REALTEK \
	--disable WLAN_VENDOR_RSI \
	--disable WLAN_VENDOR_ST \
	--disable WLAN_VENDOR_TI \
	--disable WLAN_VENDOR_ZYDAS \
	--enable MTD_REDBOOT_PARTS

config-dir685-features: config-base config-multiplatform config-gemini-features config-nas-features
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DRM_PANEL_ILITEK_IL9322 \
	--enable I2C \
	--enable I2C_GPIO \
	--enable SPI \
	--enable SPI_MASTER \
	--enable SPI_GPIO \
	--enable INPUT \
	--enable INPUT_KEYBOARD \
	--enable KEYBOARD_DLINK_DIR685 \
	--enable HWMON \
	--enable SENSORS_GPIO_FAN \
	--enable REGULATOR \
	--enable REGULATOR_FIXED_VOLTAGE \
	--enable NET \
	--enable INET \
	--enable WIRELESS \
	--enable CFG80211 \
	--enable MAC80211 \
	--enable CFG80211_WEXT \
	--enable NETDEVICES \
	--enable NET_CORE \
	--enable WLAN \
	--enable WLAN_VENDOR_RALINK \
	--enable PHYLIB \
	--enable MDIO_BITBANG \
	--enable MDIO_GPIO \
	--enable HAVE_NET_DSA \
	--enable NET_DSA \
	--enable NET_DSA_REALTEK \
	--enable NET_DSA_REALTEK_SMI \
	--enable NET_DSA_REALTEK_RTL8366RB \
	--enable BRIDGE \
	--enable VLAN_8021Q \
	--enable BRIDGE_VLAN_FILTERING \
	--enable ETHERNET \
	--enable NET_VENDOR_CORTINA \
	--enable GEMINI_ETHERNET \
	--disable USB_NET_DRIVERS \
	--disable WLAN_VENDOR_ADMTEK \
	--disable WLAN_VENDOR_ATH \
	--disable WLAN_VENDOR_ATMEL \
	--disable WLAN_VENDOR_BROADCOM \
	--disable WLAN_VENDOR_CISCO \
	--disable WLAN_VENDOR_INTEL \
	--disable WLAN_VENDOR_INTERSIL \
	--disable WLAN_VENDOR_MARVELL \
	--disable WLAN_VENDOR_MEDIATEK \
	--enable WLAN_VENDOR_RALINK \
	--enable RT2X00 \
	--enable RT2800PCI \
	--disable WLAN_VENDOR_REALTEK \
	--disable WLAN_VENDOR_RSI \
	--disable WLAN_VENDOR_ST \
	--disable WLAN_VENDOR_TI \
	--disable WLAN_VENDOR_ZYDAS \
	--enable THERMAL \
	--enable THERMAL_HWMON \
	--enable SENSORS_DRIVETEMP

config-dns313-features: config-base config-multiplatform config-gemini-features config-nas-features
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable I2C \
	--enable I2C_GPIO \
	--enable HWMON \
	--enable SENSORS_GPIO_FAN \
	--enable SENSORS_LM75 \
	--enable THERMAL \
	--enable THERMAL_HWMON \
	--enable NET \
	--enable PHYLIB \
	--enable MDIO_BITBANG \
	--enable MDIO_GPIO \
	--enable REALTEK_PHY \
	--enable LEDS_TRIGGER_DISK \
	--enable MTD_JEDECPROBE \
	--enable SCSI_MQ_DEFAULT \
	--enable IOSCHED_BFQ \
	--enable MQ_IOSCHED_KYBER \
	--enable MQ_IOSCHED_DEADLINE

# --enable FUNCTION_TRACER
# --enable FUNCTION_GRAPH_TRACER
# --enable FTRACE
# --enable FTRACE_SYSCALLS
# CMDLINE "ftrace=events trace_event=syscalls\:*"
config-trace: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable FTRACE \
	--enable FTRACE_SYSCALLS \
	--disable TRACING_EVENTS_GPIO

config-kasan: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable KASAN \
	--enable KASAN_OUTLINE \
	--enable STACKTRACE \
	--enable SLUB_DEBUG_ON \
	--enable TEST_KASAN

config-cfi: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable CFI_CLANG \
	--enable CFI_PERMISSIVE \
	--enable FTRACE \
	--enable FUNCTION_TRACER \
	--enable LKDTM

config-ksmbd: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable SMB_SERVER

config-usb-host: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable USB_FOTG210 \
	--enable USB_FOTG210_HCD

config-usb-device: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable USB_FOTG210 \
	--enable USB_FOTG210_HCD \
	--enable USB_GADGET \
	--enable USB_G_SERIAL \
	--enable U_SERIAL_CONSOLE \
	--enable USB_FOTG210_UDC \
	--disable USB_CONN_GPIO \
	--enable USB_GPIO_VBUS

config-rtl8366rb-dsatest: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable HAVE_NET_DSA \
	--enable NET_DSA \
	--enable NET_DSA_REALTEK \
	--enable NET_DSA_REALTEK_SMI \
	--enable NET_DSA_REALTEK_RTL8366RB \
	--enable NET_DSA_LOOP

# config-initramfs config-kasan config-earlydebug config-initramfs
config: config-base config-gemini-features config-storage config-sq201-features config-dir685-features config-dns313-features config-multiplatform config-openwrt config-ksmbd config-usb-device
	$(CURDIR)/scripts/config --file $(config_file) \
	--set-str CMDLINE $(cmdline) \
	--disable CMDLINE_FROM_BOOTLOADER \
	--disable CMDLINE_EXTEND \
	--enable JFFS2_SUMMARY \
	--enable JFFS2_COMPRESSION_OPTIONS \
	--enable JFFS2_LZO \
	--enable AEABI \
	--enable OABI_COMPAT \
	--enable NET_DSA_VITESSE_VSC73XX \
	--enable NET_DSA_VITESSE_VSC73XX_SPI \
	--enable CPU_IDLE \
	--enable CPU_IDLE_GOV_TEO \
	--disable CPU_IDLE_GOV_MENU \
	--enable ARM_CPUIDLE \
	--enable ARM_GEMINI_CPUIDLE \
	--enable PACKET
	yes "" | make $(make_options) oldconfig

# Russell is skeptic about these.
#	--enable AEABI
#	--enable OABI_COMPAT

menuconfig: FORCE
	if [ ! -d $(build_dir) ] ; then \
	   echo "no build dir" ; \
	   exit 1 ; \
        fi
	$(MAKE) $(make_options) menuconfig
	$(MAKE) $(make_options) savedefconfig

saveconfig: config-base config-gemini-features config-sq201-features config-dir685-features config-dns313-features FORCE
	yes "" | make $(make_options) oldconfig
	$(MAKE) $(make_options) savedefconfig
	cp $(build_dir)/defconfig arch/arm/configs/gemini_defconfig

# Tag on KBUILD_VERBOSE=1 to get verbose build output
build-zimage: have-crosscompiler
	$(MAKE) $(make_options) zImage $(make_flags)

build-modules: build-zimage
	$(MAKE) $(make_options) modules $(make_flags)
	rm -rf /tmp/gemini-modules
	mkdir -p /tmp/gemini-modules
	$(MAKE) $(make_options) INSTALL_MOD_PATH=/tmp/gemini-modules \
		modules_install $(make_flags)
	cd /tmp/gemini-modules && tar cf $(output_dir)/gemini-modules.tar lib
	if [ -f $(output_dir)/gemini-modules.tar.gz ] ; then \
	   rm -f $(output_dir)/gemini-modules.tar.gz ; \
	fi
	gzip -9 $(output_dir)/gemini-modules.tar

build-dtbs: FORCE
	$(MAKE) $(make_options) dtbs W=1 $(make_flags)

check-bindings: FORCE
	$(MAKE) $(make_options) dt_binding_check $(make_flags)
	$(MAKE) $(make_options) dtbs_check $(make_flags)

build-zimage-dt: build-zimage build-dtbs
	@if [ ! -r $(dtb) ] ; then \
	   echo "NO DTB in $(dtb)!" ; \
	   exit 1 ; \
	fi
	@echo "Copy zImage to $(output_dir)/zImage"
	cp $(build_dir)/arch/arm/boot/zImage $(output_dir)/zImage
	@echo "Catenate DTB onto zImage $(output_dir)/zImage..."
	cat $(dtb) >> $(output_dir)/zImage
	# If we have a TFTP boot directory
	@if [ -w $(tftp_dir) ] ; then \
	  echo "copy zImage to $(tftp_dir)" ; \
	  cp $(output_dir)/zImage $(tftp_dir) ; \
	fi
	@if [ -w $(nfs_dir) ] ; then \
	  echo "copy zImage to $(nfs_dir)" ; \
	  cp $(output_dir)/zImage $(nfs_dir) ; \
	fi
	@echo "Boot sequence:"
	@echo
	@echo "load -m tftp -b 0x400000"
	# @echo "169.254.1.1"
	@echo "192.168.1.2"
	@echo "zImage"
	@echo "go 0x400000"

build-nas4220b-image: build-zimage-dt
	@echo "Create a NAS4220B image"
	echo -en "\x07\x1c\xa0\xe3\xf6\x10\x81\xe3" > $(output_dir)/nas4220-zImage
	cat $(output_dir)/zImage >> $(output_dir)/nas4220-zImage

build-dns313-images: build-zimage-dt
	@echo "Create a HDD image"
	if [ -d $(output_dir)/dns313-images/.boot ] ; then \
	  rm -rf $(output_dir)/dns313-images/.boot ; \
	fi
	mkdir -p $(output_dir)/dns313-images/.boot
	dns313-header $(output_dir)/zImage \
		      $(output_dir)/dns313-images/.boot/zImage
	echo "dummy" > $(output_dir)/dns313-images/dummyfile
	dns313-header $(output_dir)/dns313-images/dummyfile \
		      $(output_dir)/dns313-images/.boot/rootfs.tgz
	dns313-header $(output_dir)/dns313-images/dummyfile \
		      $(output_dir)/dns313-images/.boot/rd.gz
	rm $(output_dir)/dns313-images/dummyfile
	cd $(output_dir)/dns313-images && tar -cvf dlink-dns313-bootpart.tar .boot && mv dlink-dns313-bootpart.tar $(output_dir)
	if [ -f $(output_dir)/dlink-dns313-bootpart.tar.gz ] ; then \
	  rm $(output_dir)/dlink-dns313-bootpart.tar.gz ; \
	fi
	gzip -9  $(output_dir)/dlink-dns313-bootpart.tar
	@echo "complete."

build: build-zimage-dt
	@echo "complete."

headers: have-rootfs have-crosscompiler build-zimage FORCE
	$(MAKE) $(make_options) headers_install INSTALL_HDR_PATH=/tmp

clean:
	$(MAKE) -f Makefile clean
	rm -rf $(build_dir)

# Rules without commands or prerequisites that do not match a file name
# are considered to always change when make runs. This means that any rule
# that depends on FORCE will always be remade also.
FORCE: