Re: [Qemu-devel] Split vga module

["Màrius Montón" <marius.monton@uab.cat>]

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Blue Swirl wrote:
> On 6/25/08, Màrius Montón <marius.monton@uab.cat> wrote:
>   
>>  Hello, and thank you for your quick answer,
>>
>>  the problem I see is not with the register access (this is done for other devices) but with the graphics side.
>>  I don't understand how VGA device draws the screen, (I guess is done using SDL), and I think this part is too merged with QEMU itself. Is it true?
>>
>>  Màrius
>>
>>
>>  Blue Swirl wrote:
>>    On 6/25/08, Màrius Montón <marius.monton@uab.cat> wrote:
>>
>>
>>       Hello all,
>>
>>  My question is how I can split VGA module in a different process from QEMU.
>>
>>  I need it in order to simulate a VGA module described in SystemC into QEMU (http://www.greensocs.com/en/projects/QEMUSystemC) where all SystemC stuff runs in other process than QEMU.
>>
>>  I look at the code, and vga code seems to be too merged with QEMU itself to be splitted.. but, there's any solution?
>>
>>       Interesting. You could try to catch all IO and MMIO towards VGA and
>> redirect those to the other process with some kind of IPC. You must
>> change the MMIO area registration, because now the VGA MMIO accesses
>> are optimised so that no callbacks are involved.
>>     
>
> Well, the graphics side can be SDL, VNC or dummy. I wonder why would
> you want to handle that area, because from the emulated system point
> of view, your device would be between the screen and the VGA card.
>   
In fact my idea is to replace the vga module with a new one, using 
SystemC stuff, and because this stuff is in a different process 
(communicated with qemu using sockets) I need to split VGA part (both 
emulated part and graphics part) from QEMU

-- 
Màrius Montón i Macián   marius.monton@uab.cat 
<mailto:marius.monton@uab.cat>  http://cephis.uab.es 
<http://www.mariusmonton.name>
Hardware Engineer
CEPHIS
Centre de Prototips i Solucions Hardware-Software
Dep. Microelectrònica i Sistemes Electrònics
ETSE - Universitat Autònoma de Barcelona (UAB) 	Phone: +34 935 813 534
Fax: +34 935 813 033
QC-2090D. ETSE. Campus UAB.
080193 Bellaterra



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