simplified mkimage for the MagicX XU Mini M

mkimage.sh

#!/bin/bash
set -x

HERE=$(dirname "$0")
cd "$HERE"

SYSTEM_SIZE=368
SYSTEM_PART_START=32768
BOOTLOADER="u-boot"
DISK_LABEL=msdos
UBOOT_SYSTEM="rg351v"
TARGET_IMG="$HERE"
IMAGE_NAME=MOSS

DISTRO_BOOTLABEL="MOSS"
UUID_SYSTEM=0508-2833

DISK_START_PADDING=$(( (${SYSTEM_PART_START} + 2048 - 1) / 2048 ))
DISK_GPT_PADDING=1
DISK_SIZE=$(( ${DISK_START_PADDING} + ${SYSTEM_SIZE} + ${DISK_GPT_PADDING} ))

DISK_BASENAME="${TARGET_IMG}/${IMAGE_NAME}"
DISK="${DISK_BASENAME}.img"
rm "$DISK"

LE_TMP=$(mktemp -d)

# create image
dd if=/dev/zero of="${DISK}" bs=1M count="${DISK_SIZE}" conv=fsync
sync

# set label
parted -s "${DISK}" mklabel ${DISK_LABEL}
sync

# create part 1
SYSTEM_PART_END=$(( ${SYSTEM_PART_START} + (${SYSTEM_SIZE} * 1024 * 1024 / 512) - 1 ))
parted -s "${DISK}" -a min unit s mkpart primary fat32 ${SYSTEM_PART_START} ${SYSTEM_PART_END}
parted -s "${DISK}" set 1 boot on

# create fs on part 1
OFFSET=$(( ${SYSTEM_PART_START} * 512 ))
HEADS=4
TRACKS=32
SECTORS=$(( ${SYSTEM_SIZE} * 1024 * 1024 / 512 / ${HEADS} / ${TRACKS} ))

shopt -s expand_aliases  # enables alias expansion in script
alias mformat="mformat -i ${DISK}@@${OFFSET} -h ${HEADS} -t ${TRACKS} -s ${SECTORS}"
alias mcopy="mcopy -i ${DISK}@@${OFFSET}"
alias mmd="mmd -i ${DISK}@@${OFFSET}"

mformat -v "${DISTRO_BOOTLABEL}" -N "${UUID_SYSTEM//-/}" ::
sync

# add KERNEL/SYSTEM/dtb/etal
mcopy ${DISTRO_BOOTLABEL}/* ::
sync

# MOSS.pre is copied from stock TF1
# dd if=MAGICX-STOCK.img of=MOSS.pre bs=1024 skip=32 count=16352

dd if=${DISTRO_BOOTLABEL}.pre of=${DISK} bs=1024 seek=32 conv=fsync,notrunc

# TODO: might require a pass through gdisk to add GPT (complains about it missing)

Expects a folder named "MOSS" (change with $IMAGE_NAME or $DISTRO_BOOTLABEL, those should be the same thing now that I look at it) containing the contents of the MAGICX partition of TF1, with modified KERNEL and SYSTEM images, dtbs, and extlinux confs) as well as a file named MOSS.pre ripped from the stock TF1 containing stock u-boot. eg. dd if=MAGICX-STOCK.img of=MOSS.pre bs=1024 skip=32 count=16352