Re: [Qemu-devel] adding ports to the ss5.

[Jean-Michel SCHRAMM <Jean.Michel.Schramm@genavir.fr>]

Le 18/03/2013 14:27, Artyom Tarasenko a écrit :
> Back to Europe from the Great Baikal lake.
Nice... :-)
>>> None that I know of. If you have to use the proprietary firmware
>>> (ss5.bin, ss20.bin and so on), I think extending qemu that it persists
>>> nvram is the way to go. I think the initialization of the nvram
>>> happens in sun4m.c. At least it used to be there. You'd have to add
>>> some option like -nvram=file.bin which would disable -prom-env
>>> options.
>>
>> OK, great info. I might try this when I will succeed getting new serial port
>> to the prom.
> Please publish the code to the qemu-devel list, if you make it.

Arg! Unfortunately I think it is beyond my competences but I will give a 
try. Another way would be to push Bob's upgrades, among them cg3.c to 
the update qemu. So we could use openbios as Mark said and pass the 
command in the script.

>
>> Well, I thought I had to had fields to the escc_init function because I was
>> understanding qemu_irq & CharDriverState fields as ttya and ttyb
>> description. But I understand from your answser that I was confused by the a
>> & b channel for an escc port?
>> But then where are the two intitialisation of ttya and ttyb?
> Well the channels a and be are the ttya and ttyb (except that I'm not
> sure whether the channel a is ttya or ttyb at the end).
OK so it's like one Zylog port with two channels..?
>> I think I lack understanting of this:
>>
>>   slavio_serial_ms_kbd_init(hwdef->ms_kb_base, slavio_irq[14],
>>                                display_type == DT_NOGRAPHIC, ESCC_CLOCK, 1);
>>      // Slavio TTYA (base+4, Linux ttyS0) is the first Qemu serial device
>>      // Slavio TTYB (base+0, Linux ttyS1) is the second Qemu serial device
>>      escc_init(hwdef->serial_base, slavio_irq[15], slavio_irq[15],
>>                serial_hds[0], serial_hds[1], ESCC_CLOCK, 1);
>>
>> Especially the coment (no much comment in there :-) ) base+4 and base+0. I
>> can't see where this is defined.
> hwdef->serial_base is the physical address of the serial port ttyb.
> And hwdef->serial_base+4 is the address of ttya.

OK, I got the comment but I cannot see where this is done. I mean where 
is it define in the code that base+4 address. The only parameter which 
is passed to escc_init is base.

>
> I guess you just need a couple of more calls to escc_init with the
> different base address and irq, incrementing serial_hds[] all the
> time. Don't know how many ports can share the same irq line - there
> may be limitations both on qemu and SunOS sides.

Now that I had got the network working through a bridge, I have started 
work on this issue this afternoon.

>
> Alternatively, you can use the PC rs232 ports. If SunOS 4.x does
> support them. I've never saw them in the real sun4m machines. In the
> sun4u device tree they are called "su". (The escc ports are called
> "zs" - which I believe is the short form of "Zilog Serial").
? I'll have a look at sun4u.c


Thanks again,
Cheers,
Jean Michel



>
> Artyom
>
>>>> Artyom Tarasenko <atar4qemu@gmail.com> a écrit&nbsp;:
>>>>
>>>>> ss5.bin doesn't auto detect the ports. You'll have to execute some
>>>>> Forth commands at the OBP "ok" prompt to make them visible in the
>>>>> device tree. Can't tell the exact commands right now. There is a free
>>>>> book "writing device drivers" (the name might be not exact) from
>>>>> Sun/Oracle. You can try looking up the example there.
>>>>>
>>>>> Artyom
>>>>>
>>>>> Sent from a mobile phone. Please excuse my brevity and autocorrected
>>>>> typos.
>>>>>
>>>>> ----- Ursprüngliche Nachricht -----
>>>>> Von: Jean-Michel SCHRAMM
>>>>> Gesendet: 15.03.2013 19:02
>>>>> An: Artyom Tarasenko
>>>>> Betreff: adding ports to the ss5.
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>> --
>>> Regards,
>>> Artyom Tarasenko
>>>
>>> solaris/sparc under qemu blog: http://tyom.blogspot.com/search/label/qemu
>>>
>>>
>
>