移植YAFFS文件系统

移植YAFFS文件系统:  (linux-3.4.2内核)

 

1.git clone git:// //用此获得yaffs2源码包

 

1.1 解压源码包

 

2. 打补丁

cd yaffs-dir
./patch-ker.sh  c m linux-tree   比如 ./patch-ker.sh c m /work/system/linux-3.4.2

 

 

3. 配置内核支持YAFFS
-> File systems                                                     |
  |       -> Miscellaneous filesystems (MISC_FILESYSTEMS [=y])              |
  |         -> yaffs2 file system support (YAFFS_FS [=n])                   |
  |           -> 512 byte / page devices (YAFFS_YAFFS1 [=n])                |
  |             -> Use older-style on-NAND data format with pageStatus byte

选上，使用默认值

4. 编译、使用uImage

编译出现错误：
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_mtd_put_super':
fs/yaffs2/yaffs_vfs.c:2514: error: 'struct mtd_info' has no member named 'sync'
fs/yaffs2/yaffs_vfs.c:2515: error: 'struct mtd_info' has no member named 'sync'
fs/yaffs2/yaffs_vfs.c: In function 'yaffs_internal_read_super':
fs/yaffs2/yaffs_vfs.c:2702: error: 'struct mtd_info' has no member named 'erase'

在新版本中sync要加下划线即：_sync 等。

fs/yaffs2/yaffs_vfs.c:2967: error: implicit declaration of function 'd_alloc_root'

此处改为：d_make_root(inode);

 

5. 制作、烧写yaffs映象
mkyaffs2image fs_mini_mdev_new fs_mini_mdev_new.yaffs2
uboot:
nfs 30000000 172.17.28.159:/work/nfs_root/fs_mini_mdev_new.yaffs2

nand erase.part rootfs /* 注：1.1.6的Uboot 擦出命令不一样  .part 要去掉，即：

nand erase rootfs */

nand write.yaffs 30000000 260000  $(filesize)

6. 启动
set bootargs console=ttySAC0,115200 root=/dev/mtdblock3
nfs 32000000 172.17.28.159:/work/nfs_root/uImage_yaffs
bootm 32000000