[Qemu-discuss] mtd emulation

[Renaud Barbier]

Hello,
I just started using qemu. Currently, I am using version 1.5.0 as I
build it using the Yocto project.

I would like to emulate two flashes on top of the existing flash system
in the ARM versatile board or files and be able to use commands such
ubiformat, ubiattach,... Preferably, I would like to use files.

So far using the qemu command options -mtdblock or -drive, I have not
been able to get two mtd devices.


I have now used the following method and made it work as follows:

- Updated qemu hw/arm/versatilepb.c to define a second flash.
- Updated Linux versatile board support to define a second flash.
- Configured Linux to enable PHYSMAP and UBI and UBIFS for testing.
- bootargs defines mtdparts as follows:
   
mtdparts=physmap-flash.0:address@hidden(nor);physmap-flash.1:address@hidden(nand)

Could somebody give some hints of how to do that using files?
The information I have gathered so far have not allowed me to use a file.

Cheers,
Renaud