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Re: [Qemu-devel] selecting a sparc framebuffer from command line


From: Artyom Tarasenko
Subject: Re: [Qemu-devel] selecting a sparc framebuffer from command line
Date: Tue, 26 Mar 2013 18:24:19 +0100

On Tue, Mar 26, 2013 at 4:08 PM, Bob Breuer <address@hidden> wrote:
> On 3/26/2013 6:13 AM, Artyom Tarasenko wrote:
>> It looks like we will have more framebuffers beside TCX in the near future.
>> One way to use them would be to make new machines combining a base
>> machine name with a framebuffer name, like ss5tcx and ss5cg3, but I
>> guess this would produce too many machines if we have more than 2
>> framebuffers.
>>
>> Should the "-vga" option be (mis)used for selecting a framebuffer?
>> They are not called "VGA" in the wild, but maybe the name VGA is
>> obvious enough for a modern user? After all there is already a "-hda"
>> option in the SPARCStation-5 emulation command line, although in the
>> non-emulating world no one calls scsi disk "hda".
>>
>> Or should an architecture-specific option, like -framebuffer be added?
>>
>
> I would like to see -device used.  With a better sbus framework, adding
> multiple video devices on sparc32 should be really easy to do.
>
> I just looked at how "-device cirrus-vga" works.  To get -device to
> override the default video, we need to add minimal support into vl.c to
> recognize each video device and handle the default_vga flag.  Then
> sparc32 could limit itself to handling either VGA_NONE or VGA_STD when
> it adds the default video.

Oh, that's even better!
And then how would the OpenBIOS find out what framebuffer to use?
Would -device cg3 add the FCode ROM? Or do we need another -device for that?


-- 
Regards,
Artyom Tarasenko

Linux/sparc and  solaris/sparc under qemu blog:
http://tyom.blogspot.com/search/label/qemu



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