[Qemu-devel] RE: /dev/mtd emulation

[Anton L. Vinokurov]

Jan, Stefan,

I've tried indeed but with no luck:
(qemu) info block
ide0-hd0: type=hd removable=0 file=vimage.dat ro=0 drv=raw encrypted=0
mtd0: type=hd removable=0 file=firmware.bin ro=0 drv=raw encrypted=0
floppy0: type=floppy removable=1 locked=0 [not inserted]
sd0: type=floppy removable=1 locked=0 [not inserted]

but same time:
~ # cat /dev/mtd0
cat: /dev/mtd0: No such device
~ # cat /dev/mtdblock0
cat: /dev/mtdblock0: No such device or address

Guest /dev/mtd0 is character device but QEMU thinks mtd0 is block.

My hardware is a network module (like NME-CUE, NME-APPRE, NME-WAE) for Cisco 
ISR routers: 1GHz Celeron CPU, CompactFlash disk, 1Gb DRAM, 1 FastEthernet, ... 
Flash memory chip is STM M50FW080 8Mbit NVRAM.

Regards,

Anton.


-----Original Message-----
From: address@hidden [mailto:address@hidden 
Sent: Wednesday, February 09, 2011 11:47 AM
To: Stefan Hajnoczi
Cc: Anton L. Vinokurov; address@hidden
Subject: Re: /dev/mtd emulation

On 2011-02-09 09:13, Stefan Hajnoczi wrote:
> On Wed, Feb 9, 2011 at 7:18 AM, Anton L. Vinokurov <address@hidden> wrote:
>> ~ # dmesg | grep mtd
>>
>> ~ #
> 
> Have you tried qemu -drive if=mtd,file=/path/to/firmware?
> 
> QEMU has some flash emulation code in
> hw/{nand.c,onenand.c,pflash_cfi01.c,pflash_cfi02.c}.  I've never used
> them but perhaps someone else can help if you provide more details
> about the hardware you are trying to emulate.

You also need to wire up that flash device on board init, i.e. add some
pflash_*_register to pc_init1. Check some embedded board for the precise
pattern.

Jan