[Yaffs] MTD nandsim HOWTO for yaffs users

[Charles Manning]

Hi Marty

The only problem with this  marked below: need CONFIG_MTD_PARTITIONS otherwise 
you don't get offered NANDSIM

I am currently using this to find the problem with the mv. I think it is most 
likely due to the Rename changes I did not being done properly which causes a 
dcache inconsistency.

On Friday 29 July 2005 16:13, Martin Fouts wrote:
> If you wish to use the mtd nandsim device as a simulator for testing
> yaffs, you can follow these steps:
>
> 1) Make sure you have a recent 2.6 kernel with a recent MTD tree.  (If
> you ask the MTD folk, they'll tell you to run the mtd patchin script
> from the latest cvs version of MTD.)
>
> 2) Configure your kernel to enable the mtd nand support and nandsim
> driver. Make sure that the following are set in .config:
>
> CONFIG_MTD=m
> CONFIG_MTD_CHAR=m
> CONFIG_MTD_BLOCK=m
CONFIG_MTD_PARTITIONS=m
> CONFIG_MTD_NAND=m
> CONFIG_MTD_NAND_NANDSIM=m
>
> You can set them to 'y' rather than 'm' if you don't want the modules
> form.
>
> 3) make and install your kernel and modules in the usual way, then boot.
>
> 4) To use the nandsim, you need to load some MTD modules, unless you've
> configured MTD into the kernel:
>
> modprobe mtdblock
> modprobe mtdchar
> modprobe nandsim
>
> 5) Verify that the nandsim device has loaded properly:
>
> cat /proc/mtd
>
> You will see something like
>
> dev:    size   erasesize  name
> mtd0: 00800000 00002000 "NAND simulator partition"
>
> If everything went well.
>
> 6) what the nand device is called will depend on your Linux distro, and
> whether you are using devfs or udev, but the '0', or whatever mtd
> reports as the device associated with the simulator, in the above will
> show up in the name.  On my ubuntu system, if /proc/mtd reports 'mtd0'
> then the block device is /dev/mtdblock0 and the char device is
> /dev/mtd0.
>
> 7) You can mount yaffs on the nandsim in the usual way.  I have
> /mnt/nand as the directory I mount on, so I would mount using
>
> mount -t yaffs /dev/mtdblock0 /mnt/nand
>
>
> If you find any errors in this, please let me know.  It wll eventually
> find its way into the yaffs documentation.
>
> Marty