riscv64: add new port on 5.10

RISC-V is a new CPU architecture aimed to be fully free and open. This
target will add support for it, based on 4.19.

Supports running on:
 - HiFive Unleashed (which is the most known devboard for this arch)
 - QEMU (support is available in mainline qemu)
Further devboards are expected given the interest in this new arch.

An SD-card image is generated, where the partitions are required to have
specific type codes. Compared to earlier branches for this target, BBL
support is removed, giving way for OpenSBI.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

diff --git a/target/linux/riscv64/Makefile b/target/linux/riscv64/Makefile
new file mode 100644 (file)
index 0000000..76222aa
--- /dev/null
+++ b/target/linux/riscv64/Makefile
@@ -0,0 +1,24 @@
+#
+# Copyright (C) 2017 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+ARCH:=riscv64
+BOARD:=riscv64
+BOARDNAME:=RISC-V HiFive Unleashed / QEMU
+FEATURES:=ext4
+KERNELNAME:=Image dtbs
+MAINTAINER:=Zoltan HERPAI <wigyori@uid0.hu>
+
+KERNEL_PATCHVER:=5.10
+
+include $(INCLUDE_DIR)/target.mk
+
+define Target/Description
+       Build firmware images for the HiFive Unleashed
+endef
+
+$(eval $(call BuildTarget))

diff --git a/target/linux/riscv64/base-files/etc/board.d/02_network b/target/linux/riscv64/base-files/etc/board.d/02_network
new file mode 100644 (file)
index 0000000..df48b43
--- /dev/null
+++ b/target/linux/riscv64/base-files/etc/board.d/02_network
@@ -0,0 +1,18 @@
+#!/bin/sh
+#
+# Copyright (C) 2013-2015 OpenWrt.org
+#
+
+. /lib/functions/uci-defaults.sh
+
+board_config_update
+
+case "$(board_name)" in
+*)
+       ucidef_set_interface_lan 'eth0'
+       ;;
+esac
+
+board_config_flush
+
+exit 0

diff --git a/target/linux/riscv64/base-files/etc/inittab b/target/linux/riscv64/base-files/etc/inittab
new file mode 100644 (file)
index 0000000..93cb948
--- /dev/null
+++ b/target/linux/riscv64/base-files/etc/inittab
@@ -0,0 +1,6 @@
+::sysinit:/etc/init.d/rcS S boot
+::shutdown:/etc/init.d/rcS K shutdown
+tts/0::askfirst:/usr/libexec/login.sh
+ttyS0::askfirst:/usr/libexec/login.sh
+ttySIF0::askfirst:/usr/libexec/login.sh
+tty1::askfirst:/usr/libexec/login.sh

diff --git a/target/linux/riscv64/base-files/lib/preinit/80_debug b/target/linux/riscv64/base-files/lib/preinit/80_debug
new file mode 100644 (file)
index 0000000..087e86e
--- /dev/null
+++ b/target/linux/riscv64/base-files/lib/preinit/80_debug
@@ -0,0 +1,9 @@
+#!/bin/sh
+# Copyright (C) 2012-2015 OpenWrt.org
+
+riscv_debug() {
+       cat /proc/cpuinfo
+}
+
+boot_hook_add preinit_main riscv_debug
+

diff --git a/target/linux/riscv64/config-5.10 b/target/linux/riscv64/config-5.10
new file mode 100644 (file)
index 0000000..acf3784
--- /dev/null
+++ b/target/linux/riscv64/config-5.10
@@ -0,0 +1,327 @@
+CONFIG_64BIT=y
+CONFIG_ARCH_CLOCKSOURCE_INIT=y
+CONFIG_ARCH_DMA_ADDR_T_64BIT=y
+CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_ARCH_MMAP_RND_BITS_MAX=24
+CONFIG_ARCH_MMAP_RND_BITS_MIN=18
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
+CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT=y
+# CONFIG_ARCH_RV32I is not set
+CONFIG_ARCH_RV64I=y
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ASN1=y
+CONFIG_ASSOCIATIVE_ARRAY=y
+CONFIG_ASYMMETRIC_KEY_TYPE=y
+CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
+CONFIG_ATA=y
+CONFIG_ATA_VERBOSE_ERROR=y
+CONFIG_BLK_DEV_SD=y
+CONFIG_BLK_MQ_PCI=y
+CONFIG_BLK_MQ_VIRTIO=y
+CONFIG_BLK_SCSI_REQUEST=y
+CONFIG_CAVIUM_PTP=y
+CONFIG_CLKDEV_LOOKUP=y
+CONFIG_CLK_ANALOGBITS_WRPLL_CLN28HPC=y
+CONFIG_CLK_SIFIVE=y
+CONFIG_CLK_SIFIVE_FU540_PRCI=y
+CONFIG_CLONE_BACKWARDS=y
+CONFIG_CLZ_TAB=y
+CONFIG_CMODEL_MEDANY=y
+# CONFIG_CMODEL_MEDLOW is not set
+CONFIG_COMMON_CLK=y
+# CONFIG_COMPAT_32BIT_TIME is not set
+CONFIG_COMPAT_BRK=y
+CONFIG_COREDUMP=y
+CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
+CONFIG_CPU_ISOLATION=y
+CONFIG_CPU_RMAP=y
+CONFIG_CRC16=y
+# CONFIG_CRC32_SARWATE is not set
+CONFIG_CRC32_SLICEBY8=y
+CONFIG_CRC7=y
+CONFIG_CRC_ITU_T=y
+CONFIG_CRYPTO_AEAD=y
+CONFIG_CRYPTO_AEAD2=y
+CONFIG_CRYPTO_AKCIPHER=y
+CONFIG_CRYPTO_AKCIPHER2=y
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_DRBG=y
+CONFIG_CRYPTO_DRBG_HMAC=y
+CONFIG_CRYPTO_DRBG_MENU=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_HASH=y
+CONFIG_CRYPTO_HASH2=y
+CONFIG_CRYPTO_HASH_INFO=y
+CONFIG_CRYPTO_HMAC=y
+CONFIG_CRYPTO_JITTERENTROPY=y
+CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
+CONFIG_CRYPTO_LIB_SHA256=y
+CONFIG_CRYPTO_MANAGER=y
+CONFIG_CRYPTO_MANAGER2=y
+CONFIG_CRYPTO_NULL=y
+CONFIG_CRYPTO_NULL2=y
+CONFIG_CRYPTO_RNG=y
+CONFIG_CRYPTO_RNG2=y
+CONFIG_CRYPTO_RNG_DEFAULT=y
+CONFIG_CRYPTO_RSA=y
+CONFIG_CRYPTO_SHA256=y
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_DECOMPRESS_GZIP=y
+CONFIG_DEVMEM=y
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_DNOTIFY=y
+CONFIG_DTC=y
+CONFIG_EDAC_SUPPORT=y
+CONFIG_ELF_CORE=y
+CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_FS_POSIX_ACL is not set
+# CONFIG_EXT3_FS_SECURITY is not set
+CONFIG_EXT4_FS=y
+CONFIG_FAILOVER=y
+CONFIG_FHANDLE=y
+CONFIG_FIXED_PHY=y
+CONFIG_FIX_EARLYCON_MEM=y
+CONFIG_FPU=y
+CONFIG_FRAME_POINTER=y
+CONFIG_FRAME_WARN=2048
+CONFIG_FS_IOMAP=y
+CONFIG_FS_MBCACHE=y
+CONFIG_FW_LOADER_PAGED_BUF=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_GENERIC_ARCH_TOPOLOGY=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CSUM=y
+CONFIG_GENERIC_EARLY_IOREMAP=y
+CONFIG_GENERIC_GETTIMEOFDAY=y
+CONFIG_GENERIC_IOREMAP=y
+CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
+CONFIG_GENERIC_IRQ_SHOW=y
+CONFIG_GENERIC_MSI_IRQ=y
+CONFIG_GENERIC_MSI_IRQ_DOMAIN=y
+CONFIG_GENERIC_PCI_IOMAP=y
+CONFIG_GENERIC_SCHED_CLOCK=y
+CONFIG_GENERIC_SMP_IDLE_THREAD=y
+CONFIG_GENERIC_STRNCPY_FROM_USER=y
+CONFIG_GENERIC_STRNLEN_USER=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_GLOB=y
+CONFIG_GOLDFISH=y
+# CONFIG_GOLDFISH_AUDIO is not set
+# CONFIG_GOLDFISH_PIPE is not set
+# CONFIG_GOLDFISH_TTY is not set
+CONFIG_GPIOLIB=y
+CONFIG_HANDLE_DOMAIN_IRQ=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT_MAP=y
+CONFIG_HID=y
+CONFIG_HID_GENERIC=y
+CONFIG_HVC_DRIVER=y
+CONFIG_HVC_RISCV_SBI=y
+CONFIG_HZ=250
+CONFIG_HZ_250=y
+CONFIG_HZ_PERIODIC=y
+CONFIG_I2C=y
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_COMPAT=y
+CONFIG_I2C_HELPER_AUTO=y
+CONFIG_I2C_OCORES=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_INPUT=y
+CONFIG_IO_URING=y
+CONFIG_IRQCHIP=y
+CONFIG_IRQ_DOMAIN=y
+CONFIG_IRQ_DOMAIN_HIERARCHY=y
+CONFIG_IRQ_WORK=y
+CONFIG_JBD2=y
+CONFIG_KALLSYMS=y
+CONFIG_KEYS=y
+CONFIG_LEGACY_PTYS=y
+CONFIG_LEGACY_PTY_COUNT=256
+CONFIG_LIBFDT=y
+CONFIG_LLD_VERSION=0
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_LOCK_DEBUGGING_SUPPORT=y
+CONFIG_LOCK_SPIN_ON_OWNER=y
+CONFIG_MACB=y
+# CONFIG_MACB_PCI is not set
+CONFIG_MACB_USE_HWSTAMP=y
+CONFIG_MANDATORY_FILE_LOCKING=y
+CONFIG_MAXPHYSMEM_128GB=y
+# CONFIG_MAXPHYSMEM_2GB is not set
+CONFIG_MDIO_BUS=y
+CONFIG_MDIO_DEVICE=y
+CONFIG_MEMFD_CREATE=y
+# CONFIG_MFD_ROHM_BD71828 is not set
+# CONFIG_MFD_SL28CPLD is not set
+CONFIG_MFD_SYSCON=y
+CONFIG_MICROSEMI_PHY=y
+CONFIG_MIGRATION=y
+CONFIG_MMC=y
+CONFIG_MMC_BLOCK=y
+# CONFIG_MMC_GOLDFISH is not set
+CONFIG_MMC_SPI=y
+# CONFIG_MMC_TIFM_SD is not set
+CONFIG_MMIOWB=y
+CONFIG_MODULES_USE_ELF_RELA=y
+CONFIG_MODULE_SECTIONS=y
+CONFIG_MPILIB=y
+CONFIG_MQ_IOSCHED_DEADLINE=y
+CONFIG_MQ_IOSCHED_KYBER=y
+CONFIG_MTD_SPI_NOR=y
+CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
+CONFIG_MUTEX_SPIN_ON_OWNER=y
+CONFIG_NAMESPACES=y
+CONFIG_NEED_DMA_MAP_STATE=y
+CONFIG_NET_FAILOVER=y
+CONFIG_NET_FLOW_LIMIT=y
+CONFIG_NET_NS=y
+CONFIG_NET_PTP_CLASSIFY=y
+CONFIG_NLS=y
+CONFIG_NR_CPUS=8
+CONFIG_NVMEM=y
+CONFIG_NVMEM_SYSFS=y
+CONFIG_OF=y
+CONFIG_OF_ADDRESS=y
+CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_FLATTREE=y
+CONFIG_OF_GPIO=y
+CONFIG_OF_IRQ=y
+CONFIG_OF_KOBJ=y
+CONFIG_OF_MDIO=y
+CONFIG_OF_NET=y
+CONFIG_OID_REGISTRY=y
+CONFIG_PADATA=y
+CONFIG_PAGE_OFFSET=0xffffffe000000000
+CONFIG_PANIC_TIMEOUT=0
+CONFIG_PA_BITS=56
+CONFIG_PCI=y
+CONFIG_PCI_DEBUG=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PCI_DOMAINS_GENERIC=y
+CONFIG_PCI_ECAM=y
+CONFIG_PCI_HOST_COMMON=y
+CONFIG_PCI_HOST_GENERIC=y
+CONFIG_PCI_MSI=y
+CONFIG_PCI_MSI_IRQ_DOMAIN=y
+CONFIG_PCI_SW_SWITCHTEC=y
+CONFIG_PGTABLE_LEVELS=3
+CONFIG_PHYLIB=y
+CONFIG_PHYLINK=y
+CONFIG_PHYS_ADDR_T_64BIT=y
+CONFIG_PID_NS=y
+CONFIG_PKCS7_MESSAGE_PARSER=y
+# CONFIG_PKCS8_PRIVATE_KEY_PARSER is not set
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
+CONFIG_PPS=y
+CONFIG_PRINTK_TIME=y
+CONFIG_PTP_1588_CLOCK=y
+CONFIG_PWM=y
+# CONFIG_PWM_SIFIVE is not set
+CONFIG_PWM_SYSFS=y
+CONFIG_R8169=y
+CONFIG_RATIONAL=y
+CONFIG_RCU_NEED_SEGCBLIST=y
+CONFIG_RCU_STALL_COMMON=y
+CONFIG_RCU_TRACE=y
+CONFIG_RD_GZIP=y
+CONFIG_REALTEK_PHY=y
+CONFIG_REGMAP=y
+CONFIG_REGMAP_MMIO=y
+CONFIG_RFS_ACCEL=y
+CONFIG_RISCV=y
+CONFIG_RISCV_INTC=y
+CONFIG_RISCV_ISA_C=y
+CONFIG_RISCV_SBI=y
+CONFIG_RISCV_SBI_V01=y
+CONFIG_RISCV_TIMER=y
+CONFIG_RPS=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_GOLDFISH=y
+# CONFIG_RTC_DRV_RV3032 is not set
+CONFIG_RTC_I2C_AND_SPI=y
+CONFIG_RWSEM_SPIN_ON_OWNER=y
+CONFIG_SATA_AHCI=y
+CONFIG_SATA_HOST=y
+CONFIG_SATA_PMP=y
+CONFIG_SATA_SIL24=y
+CONFIG_SCHED_DEBUG=y
+CONFIG_SCSI=y
+CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
+CONFIG_SERIAL_8250_NR_UARTS=4
+CONFIG_SERIAL_8250_RUNTIME_UARTS=4
+CONFIG_SERIAL_EARLYCON_RISCV_SBI=y
+CONFIG_SERIAL_MCTRL_GPIO=y
+CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SERIAL_SIFIVE=y
+CONFIG_SERIAL_SIFIVE_CONSOLE=y
+CONFIG_SERIO=y
+CONFIG_SERIO_SERPORT=y
+CONFIG_SG_POOL=y
+# CONFIG_SIFIVE_L2 is not set
+CONFIG_SIFIVE_PLIC=y
+CONFIG_SLUB_DEBUG=y
+CONFIG_SMP=y
+CONFIG_SOC_SIFIVE=y
+CONFIG_SOC_VIRT=y
+CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
+CONFIG_SPARSE_IRQ=y
+CONFIG_SPI=y
+CONFIG_SPI_BITBANG=y
+CONFIG_SPI_MASTER=y
+CONFIG_SPI_MEM=y
+CONFIG_SPI_SIFIVE=y
+CONFIG_SRCU=y
+CONFIG_STACKTRACE=y
+CONFIG_SWIOTLB=y
+CONFIG_SWPHY=y
+CONFIG_SYSCTL_EXCEPTION_TRACE=y
+CONFIG_SYSFS_SYSCALL=y
+CONFIG_SYS_SUPPORTS_HUGETLBFS=y
+CONFIG_THREAD_INFO_IN_TASK=y
+CONFIG_TICK_CPU_ACCOUNTING=y
+CONFIG_TIMER_OF=y
+CONFIG_TIMER_PROBE=y
+CONFIG_TRACE_CLOCK=y
+CONFIG_TREE_RCU=y
+CONFIG_TREE_SRCU=y
+CONFIG_TUNE_GENERIC=y
+CONFIG_UEVENT_HELPER_PATH=""
+CONFIG_USB=y
+CONFIG_USB_COMMON=y
+CONFIG_USB_EHCI_HCD=y
+# CONFIG_USB_EHCI_HCD_PLATFORM is not set
+CONFIG_USB_EHCI_PCI=y
+CONFIG_USB_HID=y
+CONFIG_USB_NET_DRIVERS=y
+CONFIG_USB_PCI=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_SUPPORT=y
+# CONFIG_USB_UHCI_HCD is not set
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_PCI=y
+# CONFIG_USB_XHCI_PLATFORM is not set
+# CONFIG_USERIO is not set
+# CONFIG_USER_NS is not set
+CONFIG_UTS_NS=y
+CONFIG_VA_BITS=39
+CONFIG_VGA_ARB=y
+CONFIG_VGA_ARB_MAX_GPUS=16
+CONFIG_VIRTIO=y
+CONFIG_VIRTIO_BLK=y
+CONFIG_VIRTIO_CONSOLE=y
+CONFIG_VIRTIO_MMIO=y
+# CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES is not set
+CONFIG_VIRTIO_NET=y
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_X509_CERTIFICATE_PARSER=y
+CONFIG_XPS=y
+CONFIG_ZLIB_INFLATE=y
+CONFIG_ZONE_DMA32=y

diff --git a/target/linux/riscv64/image/Config.in b/target/linux/riscv64/image/Config.in
new file mode 100644 (file)
index 0000000..244f789
--- /dev/null
+++ b/target/linux/riscv64/image/Config.in
@@ -0,0 +1,5 @@
+config RISCV64_SD_BOOT_PARTSIZE
+       int "Boot (SD Card) filesystem partition size (in MB)"
+       depends on TARGET_riscv64
+       default 32
+

diff --git a/target/linux/riscv64/image/Makefile b/target/linux/riscv64/image/Makefile
new file mode 100644 (file)
index 0000000..a4b0a79
--- /dev/null
+++ b/target/linux/riscv64/image/Makefile
@@ -0,0 +1,71 @@
+#
+# Copyright (C) 2020 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+include $(INCLUDE_DIR)/image.mk
+
+FAT32_BLOCK_SIZE=1024
+FAT32_BLOCKS=$(shell echo $$(($(CONFIG_RISCV64_SD_BOOT_PARTSIZE)*1024*1024/$(FAT32_BLOCK_SIZE))))
+
+KERNEL_LOADADDR:=0xa4000000
+
+define Build/riscv-sdcard
+       rm -f $@.boot #$(KDIR_TMP)/$(IMG_PREFIX)-$(PROFILE)-boot.img
+       mkfs.fat $@.boot  -C $(FAT32_BLOCKS)
+
+#      mcopy -i $@.boot $(STAGING_DIR_IMAGE)/uenv-riscv64-boot.scr ::boot.scr
+       mcopy -i $@.boot $(STAGING_DIR_IMAGE)/$(DEVICE_NAME)-boot.scr ::boot.scr
+       mcopy -i $@.boot $(DTS_DIR)/sifive/hifive-unleashed-a00.dtb ::dtb
+       mcopy -i $@.boot $(IMAGE_KERNEL) ::uImage
+
+#sifive_fu540-fit-uImage.itb
+
+       ./gen_riscv64_sdcard_img.sh \
+               $@ \
+               $@.boot \
+               $(IMAGE_ROOTFS) \
+               $(CONFIG_RISCV64_SD_BOOT_PARTSIZE) \
+               $(CONFIG_TARGET_ROOTFS_PARTSIZE) \
+               $(STAGING_DIR_IMAGE)/sifive_fu540-u-boot.itb \
+               $(STAGING_DIR_IMAGE)/sifive_fu540-u-boot.itb-spl
+#      gzip -f9 $(BIN_DIR)/$(IMG_PREFIX)-$(PROFILE)-sdcard-vfat-$(1).img
+endef
+
+define Device/Default
+  PROFILES := Default
+  KERNEL_NAME := Image
+  KERNEL := kernel-bin | uImage gzip -a 0xa4000000
+  IMAGES := sdcard.img.gz
+  IMAGE/sdcard.img.gz := riscv-sdcard | append-metadata | gzip
+endef
+
+define Device/FitImageGzip
+       KERNEL_SUFFIX := -fit-uImage.itb
+       KERNEL = kernel-bin | gzip | fit gzip $$(DTS_DIR)/$$(DEVICE_DTS).dtb
+       KERNEL_NAME := Image
+endef
+
+define Device/FitImage
+       KERNEL_SUFFIX := -fit-uImage.itb
+       KERNEL = kernel-bin | fit none $$(DTS_DIR)/$$(DEVICE_DTS).dtb
+       KERNEL_NAME := Image
+endef
+
+define Device/sifive_fu540
+  $(call Device/FitImage)
+  DEVICE_VENDOR := SiFive
+  DEVICE_MODEL := Unleashed
+  DEVICE_DTS := sifive/hifive-unleashed-a00
+  UBOOT := sifive_fu540
+endef
+
+define Image/Build
+       $(call Image/Build/$(1),$(1))
+endef
+
+TARGET_DEVICES += sifive_fu540
+
+$(eval $(call BuildImage))

diff --git a/target/linux/riscv64/image/gen_riscv64_sdcard_img.sh b/target/linux/riscv64/image/gen_riscv64_sdcard_img.sh
new file mode 100755 (executable)
index 0000000..c80fa90
--- /dev/null
+++ b/target/linux/riscv64/image/gen_riscv64_sdcard_img.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+#
+# Copyright (C) 2020 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+set -ex
+[ $# -eq 7 ] || {
+    echo "SYNTAX: $0 <file> <bbl/sbl image> <rootfs image> <bbl/sbl size> <rootfs size> <u-boot ITB image> <u-boot SPL>"
+    exit 1
+}
+
+SPL_UUID="5B193300-FC78-40CD-8002-E86C45580B47"
+UBOOT_UUID="2E54B353-1271-4842-806F-E436D6AF6985"
+BOOT_UUID="EF00"
+LINUX_UUID="0FC63DAF-8483-4772-8E79-3D69D8477DE4"
+
+#BBL_SIZE=4
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+UBOOT="$6"
+UBOOT_SPL="$7"
+
+FULLSIZE="$(($BOOTFSSIZE+$ROOTFSSIZE+6))"
+#echo "Full size is: ${FULLSIZE}M"
+
+BOOTFSOFFSET="$(($BOOTFSSIZE * 1048576 / 512 + 10274))"
+BOOTFSEND="$(( ($BBL_SIZE+$BOOTFSSIZE) * 1048576 / 512 + 10274 ))"
+echo "Bootfs is: $BOOTFSOFFSET - $BOOTFSEND"
+
+ROOTFSOFFSET="$((($BOOTFSSIZE) * 1048576 / 512 + 10274 + 2 ))"
+ROOTFSEND="$((($BOOTFSSIZE+$ROOTFSSIZE) * 1048576 / 512 + 10274 + 2))"
+echo "Rootfs is: $ROOTFSOFFSET - $ROOTFSEND"
+
+dd if=/dev/zero of=$OUTPUT bs=1M count=$FULLSIZE
+
+sgdisk --clear \
+    --set-alignment=2 \
+    --new=1:34:2081            --change-name=1:loader1 --typecode=1:${SPL_UUID} \
+    --new=2:2082:10273         --change-name=2:loader2 --typecode=2:${UBOOT_UUID} \
+    --new=3:10274:${BOOTFSEND} --change-name=3:boot    --typecode=3:${BOOT_UUID} \
+    --new=4:${ROOTFSOFFSET}:${ROOTFSEND}       --change-name=4:rootfs  --typecode=4:${LINUX_UUID} $OUTPUT
+
+dd bs=512 if="$UBOOT_SPL" of="$OUTPUT" seek=34 conv=notrunc
+dd bs=512 if="$UBOOT" of="$OUTPUT" seek=2082 conv=notrunc
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek=10274 conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek=${ROOTFSOFFSET} conv=notrunc