(1)下载YAFFS文件系统代码,下载网址: http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/ 点击页面左下角的Download tarball即可下载全部相关代码。也可在此处下载 当然如果你的NAND FLASH只是512+16B的,可以只移植yaffs,因为即使你移植了yaffs2,它也会自动选择挂载yaffs1的。 #cd /public #tar zxf yaffs2.tar.gz 则/public/yaff2/ 目录之下即是yaffs2的源码。 (2)在要移植的内核目录下建立yaffs2文件夹,并将需要的文件拷贝过来: #cd /public/linux-2.6.11.7-2410/ # cd fs # mkdir yaffs2 # cd yaffs2 # cp /public/yaffs2/*.h . # cp /public/yaffs2/*.c . # cp /public/yaffs2/Makefile-kernel Makefile # cp /public/yaffs2/Kconfig . (3)修改 /public/linux-2.6.11.7-2410/fs/Makefile 和 Kconfig文件。 # cd /public/linux-2.6.11.7-2410/fs/ # vi Makefile (将下面一行添加到Makefile中) obj-$(CONFIG_YAFFS_FS) += yaffs2/ # vi Kconfig (将下面一行添加到Kconfig中) source "fs/yaffs2/Kconfig (4)cd /public/linux-2.6.11.7-2410/ make menuconfig 在编译内核时选择: <*> YAFFS2 file system support <*> 512 byte / page devices <*> Lets Yaffs do its own ECC <*> 2048 byte (or larger) / page devices <*> Autoselect yaffs2 format <*> Disable lazy loading <*> Turn off wide tnodes <*> Turn off debug chunk erase check (5) 编译内核make zImage 看网上有人编译过程中出现了问题, 我没有碰到任何问题,很顺利。 By the way : 编译yaffs时出现了问题,编译通过不了, 这也是我选择yaff2 而没有选yaffs的一大原因。 (6) 现在板子上跑的是2.4的内核,将板子上的根文件系统换为yaffs文件系统。具体过程参见文档。 然后在vivi >param set linux_cmd_line "noinitrd root=/dev/mtdblock/3 init=/linuxrc console=ttySAC0" 修改启动参数,然后烧写刚才生成的2.6的内核。 (7) 启动成功。 NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. NetWinder Floating Point Emulator V0.95 (c) 1998-1999 Rebel.com IrCOMM protocol (Dag Brattli) yaffs: dev is 7939 name is "1f:03" VFS: Mounted root (yaffs filesystem). Mounted devfs on /dev Freeing init memory: 76K hub.c: USB new device connect on bus1/2, assigned device number 2 usb.c: USB device not accepting new address=2 (error=-110) hub.c: USB new device connect on bus1/2, assigned device number 3 usb.c: USB device not accepting new address=3 (error=-110) mount /etc as ramfs re-create the /etc/mtab entries /lib/yaffs.o: init_module: Device or resource busy Hint: insmod errors can be caused by incorrect module parameters, including invsyaffs: dev is 7940 name is "1f:04" console=/dev/coconsole=/dev/co�sole init started: BusyBox v0.60.3 (2002.05.13-08:36+0000) multi-c�ll binary Starting pid 20, console /dev/console: '/etc/init.d/rcS' Waiting for enter to start '/bin/sh' (pid 25, terminal /dev/console) Please press Enter to activate this console. Starting pid 25, console /dev/console: '/bin/sh' BusyBox v0.60.3 (2002.05.13-08:36+0000) Built-in shell (ash) Enter 'help' for a list of built-in commands.
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