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[Qemu-discuss] mtd emulation

From: Renaud Barbier
Subject: [Qemu-discuss] mtd emulation
Date: Thu, 26 Sep 2013 11:46:58 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130801 Thunderbird/17.0.8

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:

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.


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