使用v2版本的file system即天嵌科技之修改版，檔案只有u-boot,kernel,rootfs_dir三個
有獨立的filesystem系統檔案 PATH: /android_4.0.4_tq210/out/target/product/tq210/rootfs_dir
因此方便將rootfs_dir掛載成NFS
編譯檔案系統(從頭開始約70分鐘)
a. 設定防火牆 (使用ufw)(可不作)
Ubuntu 12.04 LTS請先關閉防火牆
啟用
#sudo ufw enable
關閉
#sudo ufw disable
查看防火牆狀態/規則
sudo ufw status
b. 安裝掛載程式(Install NFS)
b-1 安裝程式
#sudo apt-get install nfs-common nfs-kernel-server
b-2 修改Config NFS
#sudo vim /etc/exports
增加這行=>
/home/cadtc/v2_Android_BSP_Porting/android_4.0.4_tq210/out/target/product/tq210/rootfs_dir_1 *(rw,sync,no_root_squash)
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/media/android_mnt/rootfs_dir_1 *(rw,sync,no_root_squash)
b-3 Restart NFS Server
#sudo /etc/init.d/nfs-kernel-server restart
b-4 Test NFS (First)
#sudo mount -t nfs -o nolock -o tcp 127.0.0.1:/home/cadtc/v2_Android_BSP_Porting/android_4.0.4_tq210/out/target/product/tq210/rootfs_dir_1 /mnt
# df //查看掛載的裝置
#sudo umount /mnt //卸載裝置
c. Kernel設定NFS
以下問題需要修改kernel的NFS相關的配置
[ 4.336555] IP-Config: Complete:
[ 4.336586] device=eth0, addr=192.168.0.20, mask=255.255.255.0, gw=192.168.0.1,
[ 4.336657] host=hello, domain=, nis-domain=com.tw,
[ 4.336701] bootserver=255.255.255.255, rootserver=255.255.255.255, rootpath=
[ 4.340467] VFS: Cannot open root device "nfs" or unknown-block(0,255)
[ 4.346383] Please append a correct "root=" boot option; here are the available partitions:
[ 4.354727] 1f00 1024 mtdblock0 (driver?)
[ 4.359706] 1f01 5120 mtdblock1 (driver?)
[ 4.364728] 1f02 5120 mtdblock2 (driver?)
[ 4.369754] 1f03 3072 mtdblock3 (driver?)
[ 4.374780] 1f04 253952 mtdblock4 (driver?)
[ 4.379806] 1f05 81920 mtdblock5 (driver?)
[ 4.384833] 1f06 698368 mtdblock6 (driver?)
[ 4.389857] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,255)
[ 15.211409] eth0: no IPv6 routers present
#cd linux_3.0.8_tq210
#make menuconfig
如下所示，注意，NFS的配置選項必須在TCP/IP選擇之後才可以看到。
[*] Networking support --->
Networking options --->
[*] TCP/IP networking
[*] IP: kernel level autoconfiguration
[*] IP: BOOTP support
Device Drivers --->
[*] Network device support --->
<*> PHY Device support and infrastructure --->
[*] Ethernet (10 or 100Mbit) --->
<*> DM9000 support
File systems --->
[*] Network File Systems --->
<*> NFS client support
[*] NFS client support for NFS version 3
[ ] NFS client support for the NFSv3 ACL protocol extension
[*] NFS client support for NFS version 4
[ ] NFS client support for NFSv4.1
[*] Root file system on NFS\
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d. u-boot設定setenv
u-boot開機設定不對產生以下訊息，提示找不到init檔案
[ 4.342677] IP-Config: Complete:
[ 4.342707] device=eth0, addr=192.168.0.20, mask=255.255.255.0, gw=192.,
[ 4.342778] host=hello, domain=, nis-domain=com.tw,
[ 4.343078] bootserver=255.255.255.255, rootserver=192.168.0.1, rootpat=
[ 5.450910] VFS: Mounted root (nfs filesystem) on device 0:13.
[ 5.451017] Freeing init memory: 176K
[ 5.452843] Kernel panic - not syncing: No init found. Try passing init= op.
[ 15.132446] eth0: no IPv6 routers present
請在u-boot設定setenv
#setenv bootargs noinitrd console=ttySAC0,115200 init=/init root=/dev/nfs rw nfsroot=192.168.0.1:/home/cadtc/v2_Android_BSP_Porting/android_4.0.4_tq210/out/target/product/tq210/rootfs_dir,rsize=1024,wsize=1024 rw ip=192.168.0.20:192.168.0.1:255:255.255.0:linux_by_zsy:eth0:off
#save
#re
#boot
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註解：
將rootfs_dir改名為rootfs_dir_1 區別編譯版本
#setenv bootargs noinitrd console=ttySAC0,115200 init=/init root=/dev/nfs rw nfsroot=192.168.0.1:/media/android_mnt/rootfs_dir_1,rsize=1024,wsize=1024 rw ip=192.168.0.20:192.168.0.1:255:255.255.0:linux_by_zsy:eth0:off
setenv bootargs noinitrd console=ttySAC0,115200 init=/init root=/dev/nfs rw nfsroot=192.168.0.1:/media/android_mnt/rootfs_addLED_0807,rsize=1024,wsize=1024 rw ip=192.168.0.20:192.168.0.1:255:255.255.0:linux_by_zsy:eth0:off
v2版本的磁碟分割
ptn 0 name='bootloader' start=0x0 len=0x200000(~2048KB)
ptn 1 name='kernel' start=0x200000 len=0x800000(~8192KB)
ptn 2 name='rootfs' start=0xA00000 len=N/A (Yaffs)
還原回預設值
#bootargs=noinitrd root=/dev/mtdblock2 rootfstype=yaffs2 init=/init console=ttyS0
#bootcmd=nand read 0xc0008000 200000 800000;bootm c0008000
e. 編譯 Build Busybox
[Host]
1. wget http://busybox.net/downloads/busybox-1.21.1.tar.bz2
2. tar -jxvf busybox-1.21.1.tar.bz2
3. cd busybox-1.21.1/
4. sudo apt-get install libncurses5-dev
5. make menuconfig
Busybox Settings --->
General Configuration --->
[*] Don't use /usr
Busybox Settings --->
Build Options --->
[*] Build BusyBox as a static binary (no shared libs)
(arm-linux-) Cross Compiler prefix
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6. make -j8
7. make install
8. adb push _install/ /system/busybox/
備註：
vim ~/Android_BSP_Porting/android_4.0.4_tq210/device/embedsky/tq210/init.rc
export PATH /system/busybox/bin:/system/busybox/sbin:/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin
沒有busybox文字只有黑白，但可以使用reboot
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有busybox文字會變色，但不能使用reboot
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