Linux-2.6.32 ported to mini2440 development board - ported to yaffs2

Editor: This is not to transplant the Yaffs2 file system, but just to patch the kernel to support the Yaffs2 file system.

1. Get the yaffs2 source code

Most development boards now support the yaffs2 file system, which is a file system created specifically for embedded devices, especially embedded devices that use nand flash as storage. Earlier yaffs only supported small-page (512byte/page) nand flash. Most development boards now have larger-capacity nand flash, which are generally in large-page mode (2K/page). Using yaffs2 can support large-page nand flash. The following are the detailed steps for porting yaffs2.

You can download the latest yaffs2 source code at http://www.yaffs.net/node/346 . You need to use the git tool and enter the following in the command line:

#git clone git://www.aleph1.co.uk/yaffs2

Wait for a moment, and you can download the latest yaffs2 source code directory. There is also a separate yaffs2 source code package in this CD (the file name is: yaffs2-src-20100329.tar.gz)

2. Apply the yaffs2 patch to the kernel

Then enter the yaffs2 source code directory and execute:

#cd yaffs2

#./patch-ker.sh c /opt/FriendlyARM/mini2440/linux-2.6.32.2

Now enter the linux-2.6.32.2/fs directory and you can see that there is an additional yaffs2 directory.

3 Configuring and compiling the kernel with YAFFS2 support

In the root directory of the Linux kernel source code, run: make menuconfig, move the up and down keys to find File Systems, press Enter to enter the submenu, then find the "Miscellaneous filesystems" menu item, press Enter to enter the submenu, find "YAFFS2 file system support", and press the space bar to select it. In this way, we have added support for the yaffs2 file system to the kernel, and press "Exit" to exit the kernel configuration.

Execute from the command line:

#make zImage

4 Burn to the development board and run the test

Finally, linux-2.6.32.2/arch/arm/boot/zImage will be generated. Use supervivi's "k" function to burn it to nand flash, and press "b" to start the system. At this time, if the nand flash already has a file system (you can use supervivi's "y" function to burn the ready-made yaffs2 file system image root_qtopia-128M.img provided by Friendly Arm for testing).