| #!/bin/bash |
| |
| |
| #########可修改---开始######### |
| #分区大小，单位MB，可以是带小数 |
| if [ $# -eq 0 ]; then |
| INPUT_MTD_SIZE=32 |
| else |
| INPUT_MTD_SIZE=$1 |
| fi |
| |
| #擦除块大小 |
| MTD_ERASE_SIZE=0x40000 |
| |
| #flash页大小 |
| MTD_PAGE_SIZE=4096 |
| |
| #子页subpage大小 |
| MTD_SUBPAGE_SIZE=4096 |
| |
| #BEB保留数，每1024预留多少个给坏快 |
| BEB_RESERVE_LIMIT=20 |
| #########可修改---结束######### |
| |
| function gen_mtd_para() |
| { |
| MTD_NAME=$1 |
| MTD_SIZE_MB=$2 |
| MTD_SIZE_KB=$(awk "BEGIN { print $MTD_SIZE_MB * 1024 }") |
| BLOCK_SIZE_KB=$[$MTD_ERASE_SIZE / 1024] |
| BLOCK_CNT_1MB=$[0x100000 / $MTD_ERASE_SIZE] |
| MTD_BLOCK_CNT=$(awk "BEGIN { print $MTD_SIZE_MB * $BLOCK_CNT_1MB }") |
| BEB_RESERVE_CNT=$(awk "BEGIN { print int($BEB_RESERVE_LIMIT * $MTD_BLOCK_CNT / 1024) }") |
| if [ $BEB_RESERVE_CNT -lt 2 ]; then |
| BEB_RESERVE_CNT=2 |
| fi |
| MAX_LEB_CNT=$[$MTD_BLOCK_CNT - $BEB_RESERVE_CNT - 4] |
| if [ $MTD_SUBPAGE_SIZE -lt $MTD_PAGE_SIZE ]; then |
| LEB_SIZE=$[$MTD_ERASE_SIZE - $MTD_PAGE_SIZE] |
| else |
| LEB_SIZE=$[$MTD_ERASE_SIZE - $MTD_PAGE_SIZE - $MTD_PAGE_SIZE] |
| fi |
| LEB_SIZE_KB=$[$LEB_SIZE / 1024] |
| VOL_SIZE_KB=$[$LEB_SIZE_KB * $MAX_LEB_CNT] |
| VOL_SIZE_MB0=$(awk "BEGIN { print $VOL_SIZE_KB / 1024 }") |
| VOL_SIZE_MB=$(awk "BEGIN { print int($VOL_SIZE_KB / 1024) }") |
| |
| echo "$MTD_NAME MKUBIFS_ARGS=\"-m $MTD_PAGE_SIZE -e $LEB_SIZE -c $MAX_LEB_CNT -x zlib -F\"" |
| echo "$MTD_NAME UBINIZE_ARGS=\"-m $MTD_PAGE_SIZE -p $MTD_ERASE_SIZE -s $MTD_SUBPAGE_SIZE\"" |
| #echo "$MTD_NAME vol_size=\"${VOL_SIZE_MB}MiB\"" |
| } |
| |
| echo "generate $INPUT_MTD_SIZE MB parameter" |
| gen_mtd_para ubifs $INPUT_MTD_SIZE |
| |