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# U-Boot with the datachk patchset requires image sizes, offsets,
# and checksums to be provided in the U-Boot environment.
# This script is based on the dualboot version for devices that come with 2 OS partitions.
# For Senao boards with a "failsafe" partition image, the process is almost the same.
# Instead of booting a secondary instalation on checksum failure,
# the failsafe image is booted instead.
# These boards also use the OKLI lzma kernel loader and mtd-concat
# So the kernel check is for the loader, the rootfs check is for kernel + rootfs
platform_do_upgrade_failsafe_datachk() {
local setenv_script="/tmp/fw_env_upgrade"
local flash_base=0x9f000000
local kernel_mtd=$(find_mtd_index ${KERNEL_PART:-kernel})
local rootfs_mtd=$(find_mtd_index ${ROOTFS_PART:-rootfs})
local kernel_offset=$(cat /sys/class/mtd/mtd${kernel_mtd}/offset)
local rootfs_offset=$(cat /sys/class/mtd/mtd${rootfs_mtd}/offset)
if [ -n "$IMAGE_LIST" ]; then
KERNEL_FILE=$($IMAGE_LIST | grep $KERNEL_FILE)
ROOTFS_FILE=$($IMAGE_LIST | grep $ROOTFS_FILE)
fi
local kernel_size=$($IMAGE_CMD $KERNEL_FILE | wc -c)
local rootfs_size=$($IMAGE_CMD $ROOTFS_FILE | wc -c)
# rootfs without JFFS2
local rootfs_blocks=$((rootfs_size / 4096))
rootfs_size=$((rootfs_blocks * 4096))
local kernel_md5=$($IMAGE_CMD $KERNEL_FILE | md5sum | cut -d ' ' -f1)
local rootfs_md5=$($IMAGE_CMD $ROOTFS_FILE | dd bs=4k count=$rootfs_blocks iflag=fullblock | md5sum | cut -d ' ' -f1)
# prepare new u-boot-env vars
printf "vmlinux_start_addr 0x%08x\n" $((flash_base + kernel_offset)) >> $setenv_script
printf "vmlinux_size 0x%08x\n" ${kernel_size} >> $setenv_script
printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script
printf "rootfs_start_addr 0x%08x\n" $((flash_base + rootfs_offset)) >> $setenv_script
printf "rootfs_size 0x%08x\n" ${rootfs_size} >> $setenv_script
printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script
# store u-boot-env
mkdir -p /var/lock
fw_setenv -s $setenv_script || {
echo 'failed to update U-Boot environment'
exit 1
}
# sysupgrade
sleep 2
sync
echo 3 > /proc/sys/vm/drop_caches
$IMAGE_CMD $KERNEL_FILE | mtd $MTD_ARGS write - ${KERNEL_PART:-kernel}
sleep 2
sync
if [ -n "$UPGRADE_BACKUP" ]; then
$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j $UPGRADE_BACKUP write - ${ROOTFS_PART:-rootfs}
else
$IMAGE_CMD $ROOTFS_FILE | mtd $MTD_ARGS write - ${ROOTFS_PART:-rootfs}
fi
}
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