Re: [Qemu-devel] General IO ports in pc386

[Tomas Bures <bures@d3s.mff.cuni.cz>]

Thank you. This is exactly what I was looking for. I've created the 
device, added the compilation of it to Makefile.target . Now, I'm 
wondering how to persuade QEMU to initialize it?

I've registered it using the code below. The registration executes 
during QEMU launch, the the initialization doesn't. Please where should 
I add it?

static void ers_io_register_devices(void)
{
     isa_qdev_register(&ers_io_info);
     ers_io_debug("\n");
}

device_init(ers_io_register_devices);

Thank you, best regards,
Tomas

On 22.2.2011 9:48, Markus Armbruster wrote:
> Tomas Bures<bures@d3s.mff.cuni.cz>  writes:
>
>> Dear all,
>>
>> I'm preparing a class on embedded systems. I would like to make a
>> client that interfaces with QEMU and the application running inside
>> it. This client would simulate the physical environment that the
>> application running inside QEMU should control. To achieve this, I
>> would like to introduce use general IO ports (in a similar way they
>> are used e.g. on ARMs). Please is there a simple way to emulate the
>> general IO ports on pc386?
>>
>> If not, what would be the simplest way to create (i.e. develop) a new
>> device for QEMU? Is there any intro or some simple device, which could
>> be taken as a stub?
> If you crusty old ISA is okay for you, the ib700 watchdog device
> (hw/wdt_ib700.c) is really simple.  For PCI, maybe try the i6300esb
> watchdog (hw/wdt_i6300esb.c).
>

-- 
Tomas Bures, Ph.D.
Assistant Professor
Department of Distributed and Dependable Systems
Charles University
Malostranske nam.25
11800 Prague 1, Czech Republic
http://dsrg.mff.cuni.cz
Phone: (+420) 2 2191 4236
Fax:   (+420) 2 2191 4323