CROSS_COMPILE	?= arm-none-eabi-
build_dir       := $(CURDIR)/build-bcm6846
output_dir	:= $(HOME)
rootfs		:= $(HOME)/rootfs-bcm53xx-openwrt.cpio
fw_tools_dir	:= /mnt/storage/linus/openwrt/staging_dir/host/bin
config_file     := $(build_dir)/.config
rootfsbase	:= $(shell basename $(rootfs))
makejobs	:= $(shell grep '^processor' /proc/cpuinfo | sort -u | wc -l)
makethreads	:= $(shell dc -e "$(makejobs) 1 + p")
BCM_BOARD	?= bcm6846-genexis-xg6846b
dtb		:= $(build_dir)/arch/arm/boot/dts/broadcom/$(BCM_BOARD).dtb
tftproot	:= /var/lib/tftpboot
output_nfs	:= /mnt/storage/nfsroot/bcm6846

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

.PHONY: help
help:
	@echo "****  Common Makefile  ****"
	@echo "make config - configure for bcm53xx"
	@echo "make build - build the kernel and produce a zImage"

.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
	@if [ ! -r $(rootfs) ] ; then \
	     echo "ERROR: rootfs at $(rootfs) not readable" ; \
	     echo "ABORTING." ; \
	     exit 1 ; \
	fi

.PHONY: have-crosscompiler
have-crosscompiler:
	@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


# Config options needed to bring up rootfs on distros
config-distro: config-base
	$(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-base: FORCE
	@mkdir -p $(build_dir)
	# For multiplatform switch to this and disable earlydebug
	$(MAKE) $(make_options) bcm6846_defconfig

config-initramfs: have-rootfs config-base
	# Copy and configure in the initramfs
	@cp $(rootfs) $(build_dir)/$(rootfsbase)
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable BLK_DEV_INITRD \
	--set-str INITRAMFS_SOURCE $(rootfsbase) \
	--enable RD_XZ \
	--enable INITRAMFS_COMPRESSION_XZ

config-ext4-rootfs: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable SCSI \
	--enable USB_STORAGE \
	--enable PARTITION_ADVANCED \
	--enable MSDOS_PARTITION \
	--enable EFI_PARTITION \
	--enable EXT3_FS \
	--enable EXT4_FS \
	--set-str CMDLINE "root=/dev/sda1 rw" \
	--enable CONFIG_CMDLINE_EXTEND

config-common: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--set-str CMDLINE "console=ttyS0,115200" \
	--enable SERIAL_OF_PLATFORM \
	--enable PINCTRL_NS \
	--enable BCM47XX_NVRAM \
	--enable BCM47XX_SPROM \
	--enable WATCHDOG \
	--enable BCMA \
	--enable BCMA_BLOCKIO \
	--enable BCMA_DRIVER_GMAC_CMN \
	--enable BCMA_DRIVER_GPIO \
	--enable BCMA_DRIVER_PCI \
	--disable PHY_NS2_PCIE \
	--enable BCMA_HOST_SOC \
	--disable BCMA_SFLASH \
	--enable BCM_NET_PHYLIB \
	--enable NETDEVICES \
	--enable THERMAL \
	--enable THERMAL_GOV_STEP_WISE \
	--enable THERMAL_DEFAULT_GOV_STEP_WISE \
	--enable THERMAL_OF \
	--enable BCM_NS_THERMAL \
	--enable BGMAC \
	--enable BGMAC_BCMA \
	--enable BROADCOM_PHY \
	--enable CLK_BCM_NSP \
	--enable SPI_BCM_QSPI \
	--enable MTD \
	--enable MTD_PARTITIONED_MASTER \
	--enable MTD_SPI_NOR \
	--enable MTD_JEDECPROBE \
	--enable MTD_OF_PARTS \
	--enable MTD_BCM47XX_PARTS \
	--enable MTD_PARSER_TRX \
	--enable MTD_NAND_CORE \
	--enable MTD_RAW_NAND \
	--enable MTD_NAND_BRCMNAND \
	--enable NVMEM \
	--enable NVMEM_BRCM_NVRAM \
	--enable HW_RANDOM \
	--enable HW_RANDOM_BCM2835 \
	--enable NET_DSA \
	--enable B53 \
	--enable B53_SRAB_DRIVER \
	--enable USB_SUPPORT \
	--enable USB \
	--enable USB_OHCI_HCD \
	--enable USB_OHCI_HCD_PLATFORM \
	--enable USB_EHCI_HCD \
	--enable USB_EHCI_HCD_PLATFORM \
	--enable USB_XHCI_HCD \
	--enable USB_XHCI_PLATFORM \
	--disable USB_OHCI_HCD_SSB \
	--enable USB_HCD_BCMA \
	--enable USB_HCD_SSB \
	--disable USB_BRCMSTB \
	--enable MDIO_DEVICE \
	--enable MDIO_BUS \
	--enable OF_MDIO \
	--enable MDIO_BUS_MUX_MMIOREG \
	--enable PHY_BCM_SR_USB \
	--enable PHY_BCM_NS_USB2 \
	--enable PHY_BCM_NS_USB3

config-earlydebug-6846: config-base
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_KERNEL \
	--enable DEBUG_LL \
	--enable DEBUG_BCMBCA \
	--enable DEBUG_UNCOMPRESS \
	--enable EARLY_PRINTK \
	--set-str CMDLINE "console=ttyS0,115200 earlyprintk"

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-router: config-common
	@echo "Enabling D-Link BCM router configuration options"
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable NEW_LEDS \
	--enable LEDS_CLASS \
	--enable LEDS_GPIO \
	--enable LEDS_TRIGGERS \
	--enable LEDS_TRIGGER_HEARTBEAT \
	--enable INPUT \
	--enable KEYBOARD_GPIO \
	--enable MTD_UBI \
	--enable UBIFS_FS \
	--enable UBIFS_FS_LZO

config-xg6846b: config-common config-router
	@echo "Enabling XG6846B"
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable USE_OF \
	--enable ARM_APPENDED_DTB \
	--disable ATAGS \
	--disable ARCH_BCM_5301X \
	--disable ARCH_BCM_53573 \
	--enable ARCH_BCMBCA \
	--enable ARCH_BCMBCA_CORTEXA7 \
	--disable ARCH_BCMBCA_CORTEXA9 \
	--enable ARM_PSCI \
	--enable ARM_PSCI_CPUIDLE \
	--enable MTD_NAND_BRCMNAND_BCMBCA \
	--disable SERIAL_8250 \
	--enable SERIAL_BCM63XX \
	--enable SERIAL_BCM63XX_CONSOLE \
	--enable HW_RANDOM \
	--enable HW_RANDOM_IPROC_RNG200 \
	--disable HW_RANDOM_BCM2835 \
	--enable HW_RANDOM_ARM_SMCCC_TRNG \
	--enable WATCHDOG \
	--enable BCM7038_WDT \
	--enable GPIO_GENERIC_PLATFORM \
	--enable KEYBOARD_GPIO_POLLED \
	--enable LEDS_BCM63138 \
	--enable USB_SUPPORT \
	--enable USB \
	--enable USB_OHCI_HCD \
	--enable USB_OHCI_HCD_PLATFORM \
	--enable USB_EHCI_HCD \
	--enable USB_EHCI_HCD_PLATFORM \
	--disable USB_OHCI_HCD_SSB \
	--enable USB_HCD_BCMA \
	--enable PHY_BRCM_USB \
	--enable MDIO_DEVICE \
	--enable MDIO_BCM_UNIMAC \
	--enable NET_VENDOR_BROADCOM \
	--enable ARM_AMBA \
	--enable DMADEVICES \
	--enable AMBA_PL08X \
	--enable DMATEST

# config-earlydebug-bcm5301x config-initramfs config-earlydebug-6846
config: config-common config-xg6846b config-initramfs  config-earlydebug-6846
	$(CURDIR)/scripts/config --file $(config_file) \
	--enable DEBUG_KERNEL \
	--enable DEBUG_FS
	yes "" | make $(make_options) oldconfig

menuconfig: FORCE
	$(MAKE) $(make_options) menuconfig

saveconfig: FORCE
	$(MAKE) $(make_options) savedefconfig
	cp $(build_dir)/defconfig arch/arm/configs/bcm6846_defconfig

# Tag on KBUILD_VERBOSE=1 to get verbose build output
build-zimage: have-crosscompiler
	$(MAKE) $(make_options) zImage $(make_flags)
	@echo "Copy zImage to $(output_dir)/zImage..."
	@cp -f $(build_dir)/arch/arm/boot/zImage $(output_dir)/zImage

build-dtbs: FORCE
	$(MAKE) $(make_options) dtbs $(make_flags)

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

build-zimage-dt: build-zimage build-dtbs
	@if [ ! -r $(dtb) ] ; then \
	   echo "NO DTB in $(dtb)!" ; \
	   exit 1 ; \
	fi
	@echo "Catenate DTB onto zImage $(output_dir)/zImage..."
	cat $(dtb) >> $(output_dir)/zImage
	# $(fw_tools_dir)/lzma e -lc1 -lp2 -pb2 -d22 $(output_dir)/zImage $(output_dir)/zImage.lz
	# $(fw_tools_dir)/bcm4908kernel -i $(output_dir)/zImage.lz -o $(output_dir)/zImage.lz.brcm
	# $(HOME)/bin/bcm4908kernel -i $(output_dir)/zImage.lz -o $(output_dir)/zImage.lz.brcm
	# rm $(output_dir)/zImage.lz
	# mv $(output_dir)/zImage.lz.brcm $(output_dir)/zImage
	@echo "INFO boot with CFE like this on XG6846B:"
	@echo "r 192.168.1.2:zImage"
	@echo "loadb n 0x03000000 192.168.1.2:zImage"
	@echo "go 0x03000000"
	@if [ -w $(tftproot) ] ; then \
	   cp $(output_dir)/zImage $(tftproot) ; \
	fi
	@if [ -w $(output_nfs) ]; then \
	    echo "Copying to NFS root..." ; \
	    cp -f $(output_dir)/zImage $(output_nfs) ; \
	fi

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

TAGS: FORCE
	$(MAKE) $(make_options) TAGS

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: