下面我在fl2440開發板上運行正常的情況下實現更新或升級uboot,內核和文件系統的任務。
如下是一個在線升級的腳本：
#!/bin/sh
#This shell scripts used to update the u-boot linux kernel, root file system image when Linux running
erase_cmd=flash_eraseall
write_cmd=nandwrite
cu_version=`cat /proc/version`
PROG_NAME=`basename $0`
IMAGE_TYPE=
ROOTFS_TYPE=
usage()
{
echo " Usage: $PROG_NAME -[f/k/u/h] [filename]"
echo "Example: $PROG_NAME linuxrom-s3c2440.bin"
echo " $PROG_NAME u-boot-s3c2440.bin"
echo " $PROG_NAME rootfs.jffs2"
echo " $PROG_NAME -u uboot.bin"
echo " $PROG_NAME -k lin.bin"
echo " $PROG_NAME -f fs.yaffs2"
echo " $PROG_NAME -h"
exit;
}
burn_image()
{
partition=$1
file_name=$2
if ( ! $erase_cmd /dev/$partition) ; then
echo "Erase /dev/$partition failure."
exit
fi
if ( ! $write_cmd -p /dev/$partition $file_name) ; then
echo "Write $file_name to /dev/$partition failure."
exit
fi
}
check_and_umount()
{
MTD=$1
MTDBLOCK=mtdblock${MTD:3}
MOUNT_BLOCK=`cat /proc/mounts | grep $MTDBLOCK|awk -F " " '{print $1}'`
if [ -n "$MOUNT_BLOCK" ] ; then
umount /dev/$MTDBLOCK
else
echo "No need umount $MTDBLOCK"
fi
}
check_image_type()
{
IMAGE_NAME=$1
if echo $IMAGE_NAME | grep -E "boot|uboot|u-boot|bootloader" > /dev/null ; then
IMAGE_TYPE=BOOTLOADER
elif echo $IMAGE_NAME | grep -E "linux|kernel" > /dev/null ; then
IMAGE_TYPE=KERNEL
elif echo $IMAGE_NAME | grep -E "rootfs|jffs2|yaffs2|ubifs|cramfs|ramdisk" > /dev/null ; then
IMAGE_TYPE=ROOTFS
else
IMAGE_TYPE=UNKNOW
fi
}
up_bootloader()
{
IMAGE_FILE=$1
echo "Upgrade bootloader image '$IMAGE_FILE'"
#To-Do: Find the mtd here, only do upgrade if we can find it, or throw error and exit out
#echo $mtd | grep -E "u-boot|uboot" | awk -F ":" '{print $1}'
partition=`cat /proc/mtd | grep -E "uboot|u-boot|U-boot|bootloader" | awk -F ":" '{print $1}'`
if [ -z $partition ] ; then
echo "Can not find the u-boot partition for update!"
exit
fi
#To-Do: Start to burn the image to corresponding partition here
burn_image $partition $IMAGE_FILE
}
up_kernel()
{
IMAGE_FILE=$1
echo "Upgrade linux kernel image '$IMAGE_FILE'"
#To-Do: Find the mtd here, only do upgrade if we can find it, or throw error and exit out
#echo $mtd | grep -E "linux|kernel" | awk -F ":" '{print $1}'
partition=`cat /proc/mtd | grep -E "linux|kernel" | awk -F ":" '{print $1}'`
if [ -z $partition ] ; then
echo "Can not find the kernel partition for update!"
exit
fi
#To-Do: Start to burn the image to corresponding partition here
burn_image $partition $IMAGE_FILE
}
up_rootfs()
{
IMAGE_NAME=$1
ROOTFS_TYPE=${IMAGE_NAME##*.}
VALID_ROOTFS_TYPE=0
echo $ROOTFS_TYPE
for i in jffs2 yaffs2 ubifs ramdisk cramfs ; do
if [ "$i" = "$ROOTFS_TYPE" ] ; then
VALID_ROOTFS_TYPE=1
break;
fi
done
if [ 0 == $VALID_ROOTFS_TYPE ] ; then
echo "============================================================================================"
echo "ERROR: Unknow rootfs image '$IMAGE_NAME', suffix/type: .$ROOTFS_TYPE"
echo "The suffix of rootfs image file name should be: .ramdisk .yaffs2 .jffs2 .ubifs .cramfs"
echo "============================================================================================"
usage
fi
echo "Upgrade $ROOTFS_TYPE rootfs image '$IMAGE_FILE'"
#To-Do: Find the mtd here, only do upgrade if we can find it, or throw error and exit out
MTD=`cat /proc/mtd | grep -E "$ROOTFS_TYPE" | awk -F ":" '{print $1}'`
#To-Do: Check this partition already mounted or not, if mounted then umount it first here
check_and_umount $MTD
#To-Do: Start to burn the image to corresponding partition here
burn_image $MTD $IMAGE_FILE
}
while getopts "afku" opt
do
case $opt in
a)
IMAGE_TYPE=APPS
shift 1
break;
;;
k)
IMAGE_TYPE=KERNEL
shift 1
break;
;;
f)
IMAGE_TYPE=ROOTFS
shift 1
break;
;;
u)
IMAGE_TYPE=BOOTLOADER
shift 1
break;
;;
h)
usage
;;
?)
usage
;;
esac
done
IMAGE_FILE=$1
if [ ! -n "$IMAGE_FILE" ] ; then
usage
fi
if [ ! -n "$IMAGE_TYPE" ] ; then
check_image_type $IMAGE_FILE
fi
if [ $IMAGE_TYPE == BOOTLOADER ] ; then
up_bootloader $IMAGE_FILE
elif [ $IMAGE_TYPE == KERNEL ] ; then
up_kernel $IMAGE_FILE
elif [ $IMAGE_TYPE == ROOTFS ] ; then
echo "$IMAGE_FILE ***************"
up_rootfs $IMAGE_FILE
else
echo "============================================================================================"
echo "ERROR: Unknow image type: '$IMAGE_NAME'"
echo "============================================================================================"
usage
fi
文件系統如下：
[lingyun@localhost fulinux]$ ls
kernel rootfs systools u-boot
[lingyun@localhost fulinux]$ cd rootfs/
[lingyun@localhost rootfs]$ ls
ramdisk-s3c2440.gz rootfs rootfs_tree.tar.bz2 tools
[lingyun@localhost rootfs]$ cd rootfs
[lingyun@localhost rootfs]$ pwd
/home/lingyun/fulinux/rootfs/rootfs
[lingyun@localhost rootfs]$
因為上面的shell腳本需要用到兩個應用程序flash_eraseall和nandwrite所以需要在上面的文件系統裡有這兩個程序。如果沒有添加方式如下：
[lingyun@localhost fulinux]$ ls
kernel rootfs systools u-boot
[lingyun@localhost fulinux]$ cd systools/
[lingyun@localhost systools]$ ls
busybox
[lingyun@localhost systools]$ cd busybox/
[lingyun@localhost busybox]$ ls
build.sh busybox-1.20.2 busybox-1.20.2.tar.bz2 patch
[lingyun@localhost busybox]$ cd busybox-1.20.2
[lingyun@localhost busybox-1.20.2]$
[lingyun@localhost busybox]$ ls
build.sh busybox-1.20.2 busybox-1.20.2.tar.bz2 patch
[lingyun@localhost busybox]$ cd busybox-1.20.2
[lingyun@localhost busybox-1.20.2]$ vt100
[lingyun@localhost busybox-1.20.2]$ make menuconfig
主目錄：
Busybox Settings --->
。。。
Installation Options ("make install" behavior) --->
What kind of applet links to install (as soft-links) --->
指定文件系統的目錄位置：
(/home/lingyun/fulinux/systools/busybox/../../rootfs/rootfs) BusyBox installation prefix
。。。
回到主目錄：
Miscellaneous Utilities --->
選擇如下的兩個程序：
。。。
[*] nandwrite
。。。
[*] flash_eraseall
。。。
保存退出。