用于SD卡启动android的脚本

上篇博客介绍过SD卡启动android的脚本的大致情况，此脚本是在上一篇的基础上有所改过，它是支持s5pv210的，相关烧写参数发生了改变，这个脚本要把android的system目录data目录和cache目录都挂到root根目录下，与上一篇有点差别。

#! /bin/bash
export LC_ALL=C

if [ $# -ne 1 ]; then
        echo "Usage: $0 "
        exit 1;
fi

DRIVE=$1

SKIPMEDIA=0

OUT_READY=0
ROOT_DIR=$(pwd)
PRODUCT='s5pv210'

#OFFSET_AUTHKEY=1
#OFFSET_BL1=9
#OFFSET_BL2=57
bl1_position=1
uboot_position=49
OFFSET_KERNEL=1073
OFFSET_ROOTFS=9265

SIZE_AUTHKEY=8
SIZE_UBOOT=1072
SIZE_KERNEL=8192
SIZE_ROOTFS=6142

if [ -e "$ROOT_DIR/out/target/product/$PRODUCT" ] ; then
OUT_DIR="$ROOT_DIR/out/target/product/$PRODUCT"
elif [ -e "$PRODUCT" ] ; then
OUT_DIR="$PRODUCT"
else
    echo "At least one out dir needed."
    OUT_DIR=""
    exit 1
fi

function format_drive (){
echo "Formatting boot drive"
if [ -b ${DRIVE}2 ]; then
    umount ${DRIVE}2
        mkfs.ext4 -L "sys_uw" ${DRIVE}2
else
        if [ -b ${DRIVE}p2 ]; then
        umount ${DRIVE}p2
            mkfs.ext4 -L "sys_uw" ${DRIVE}p2
        else
                echo "Can't find boot partition in /dev"
        fi
fi
}

function format_vfat () {
echo "Formatting vfat data partition"

if [ -b ${DRIVE}1 ]; then
    umount ${DRIVE}1
        mkfs.vfat -F 32 -n "fat_uw" ${DRIVE}1
else
        if [ -b ${DRIVE}p1 ]; then
        umount ${DRIVE}p1
            mkfs.vfat -F 32 -n "fat_uw" ${DRIVE}p1
        else
                echo "Can't find boot partition in /dev"
        fi
fi

}


function write_disk (){
echo "Writing android images into disck"

if [ -b ${DRIVE} ]; then
    ./${OUT_DIR}/mkbl1 ${OUT_DIR}/u-boot.bin SD-bl1-8k.bin 8192
    dd iflag=dsync oflag=dsync if=SD-bl1-8k.bin of=${DRIVE} seek=$bl1_position
    rm SD-bl1-8k.bin
#    dd of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$OFFSET_AUTHKEY count=$SIZE_AUTHKEY bs=512
#    dd of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$OFFSET_BL1 count=$SIZE_UBOOT bs=512
    dd iflag=dsync oflag=dsync of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$uboot_position bs=512
    dd iflag=dsync oflag=dsync of=${DRIVE} if=${OUT_DIR}/zImage seek=$OFFSET_KERNEL count=$SIZE_KERNEL bs=512
#    dd iflag=dsync oflag=dsync of=${DRIVE} if=${OUT_DIR}/ramdisk-uboot.img skip=$OFFSET_ROOTFS count=$SIZE_ROOTFS bs=512
else
    echo "Can't write boot sectors into ${DRIVE}"
fi

}


function cp_root (){
mkdir ${OUT_DIR}/tmp
if [ -b ${DRIVE}2 ]; then
    umount ${DRIVE}2
    mount -t ext4 ${DRIVE}2 ${OUT_DIR}/tmp
else
        if [ -b ${DRIVE}p2 ]; then
        umount ${DRIVE}p2
            mount -t ext4 ${DRIVE}p2 ${OUT_DIR}/tmp
        else
                echo "Can't find root partition in ${DRIVE}"
        fi
fi

if [ "$?" -eq 0 ] ; then
    echo "No root partition found, quit."
fi
    cp -rp ${OUT_DIR}/root/* ${OUT_DIR}/tmp
    umount ${OUT_DIR}/tmp
    rm -rf ${OUT_DIR}/tmp
    echo "Writing root files finished."
    return $?

}

function wite_image (){
    echo "Writing kernrl images into disck"
    ./${OUT_DIR}/mkbl1 ${OUT_DIR}/u-boot.bin SD-bl1-8k.bin 8192
    dd iflag=dsync oflag=dsync if=SD-bl1-8k.bin of=${DRIVE} seek=$bl1_position
    rm SD-bl1-8k.bin
#    dd of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$OFFSET_AUTHKEY count=$SIZE_AUTHKEY bs=512
#    dd of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$OFFSET_BL1 count=$SIZE_UBOOT bs=512
    dd iflag=dsync oflag=dsync of=${DRIVE} if=${OUT_DIR}/u-boot.bin seek=$uboot_position bs=512
    dd iflag=dsync oflag=dsync of=${DRIVE} if=${OUT_DIR}/zImage seek=$OFFSET_KERNEL count=$SIZE_KERNEL bs=512
}

function create_drives(){
if [ -b ${DRIVE}1 ]; then
        umount ${DRIVE}1
    umount ${DRIVE}2
else
        if [ -b ${DRIVE}p1 ]; then
            umount ${DRIVE}p1
        umount ${DRIVE}p2
        else
                echo "Can't find boot partition in /dev"
        fi
fi

dd if=/dev/zero of=$DRIVE bs=1024 count=1024

SIZE=`fdisk -l $DRIVE | grep Disk | grep bytes | awk '{print $5}'`

echo DISK SIZE - $SIZE bytes

CYLINDERS=`echo $SIZE/255/63/512 | bc`
echo CYLINDERS - $CYLINDERS

{
echo 203,,0x0C,-
echo 9,191,0x83,-
} | sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE

sleep 1
}


#MAIN fucntion
echo "To Writing uboot kernrl images into disck, enter 'k'."
echo "To create a new drive, and fill it with android image enter 'c'."
echo "To Exit, enter 'r'."
echo -n "Enter k , c or r:"

read answer

case "$answer" in
k) format_drive; wite_image; exit;;
c) create_drives; format_drive; format_vfat; write_disk; cp_root; exit ;;
r) exit;;
*) echo "Not a valid option. Exiting"; exit ;;
esac

eject ${DRIVE}