target/linux/mediatek/image/gen_mt7622_emmc_img.sh

   1 #!/bin/sh
   2
   3 OUTPUT_FILE=$1
   4 KERNEL_FILE=$2
   5 RECOVERY_FILE=$3
   6 ROOTFS_FILE=$4
   7
   8 BS=512
   9
  10 #RECOVERY_OFFSET= kernel size / BS = 20M / 512 (blocks)
  11 RECOVERY_OFFSET=40960
  12
  13 #ROOTFS_OFFSET = RECOVERY_OFFSET + (RECOVERY_SIZE / BS)
  14 #              = 40960 + (10M  / 512) (blocks)
  15 ROOTFS_OFFSET=61440
  16 dd bs="$BS" of="$OUTPUT_FILE" if="$KERNEL_FILE"
  17 dd bs="$BS" of="$OUTPUT_FILE" if="$RECOVERY_FILE" seek="$RECOVERY_OFFSET"
  18 dd bs="$BS" of="$OUTPUT_FILE" if="$ROOTFS_FILE" seek="$ROOTFS_OFFSET"
  19 dd if=/dev/zero of="$OUTPUT_FILE" bs=128k count=1 oflag=append conv=notrunc