Re: [Qemu-devel] Split vga module

[Blue Swirl]

On 6/25/08, Màrius Montón <address@hidden> 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 <address@hidden> 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.