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spacemit: write_uboot_platform: check first, then write down

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The files included in u-boot are rarely changed or do not
change at all. Compare bit by bit the memory region in which
the file will be located and the file itself. If they match,
then skip the recording.
This saves the life of the memory chip.
This commit is contained in:
The-going 2024-12-27 16:29:40 +03:00 committed by c0rnelius
parent c54410b9ba
commit 82898e701f
1 changed files with 28 additions and 16 deletions
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44
config/sources/families/spacemit.conf
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@ -55,22 +55,34 @@ pre_prepare_partitions() {
}
write_uboot_platform() {
local device=${2}
local device N
declare -A d
d=(
["bootinfo_emmc.bin"]="0:$(du -b ${1}/bootinfo_emmc.bin | awk '{print $1}')"
["FSBL.bin"]="1:$(du -b ${1}/FSBL.bin | awk '{print $1}')"
["fw_dynamic.itb"]="1280:$(du -b ${1}/fw_dynamic.itb | awk '{print $1}')"
["u-boot.itb"]="2048:$(du -b ${1}/u-boot.itb | awk '{print $1}')"
)
device=${2}
if [ -b ${2}boot0 ]; then
echo "eMMC"
DEVICE=`ls /dev/mmcblk*boot0 | sed 's/^.....//'`
echo 0 > /sys/block/${DEVICE}/force_ro
sleep .50
dd if="$1/bootinfo_emmc.bin" of="/dev/${DEVICE}" bs=512 conv=notrunc
dd if="$1/FSBL.bin" of="/dev/${DEVICE}" bs=512 seek=1 conv=notrunc
dd if="$1/FSBL.bin" of="/dev/${DEVICE}" bs=512 seek=512 conv=notrunc
else
echo "SD card"
dd if="$1/bootinfo_emmc.bin" of=$2 bs=512 conv=notrunc
dd if="$1/FSBL.bin" of="$2" bs=512 seek=1 conv=notrunc
dd if="$1/FSBL.bin" of="$2" bs=512 seek=512 conv=notrunc
device=${2}boot0
echo 0 > /sys/block/$(basename ${device})/force_ro
sync
fi
dd if="$1/fw_dynamic.itb" of="$2" bs=512 seek=1280 conv=notrunc
dd if="$1/u-boot.itb" of="$2" bs=512 seek=2048 conv=notrunc
sync
for f in "${!d[@]}"; do
N=$((${d[$f]%:*} * 512))
if dd "if=${device}" bs=1 "skip=$N" "count=${d[$f]#*:}" \
conv=notrunc status=noxfer 2> /dev/null | cmp --quiet "${1}/${f}"; then
echo "Skip $f, it is equal to the existing one"
else
echo "# Write $f to ${device}"
dd "if=${1}/${f}" "of=${device}" bs=512 "seek=${d[$f]%:*}" conv=notrunc,fsync status=noxfer
fi
done
}