Re: [Freemint-discuss] Virtual Memory Implementation Ideas

[Mark D. <mdu...@at...>]

On 5/8/23 9:11 AM, Adam Klobukowski wrote:
>
> I think it could be fine to allow them to use virtual memory in TT-RAM 
> space, but it should be share between all GEM programs
> I'd suggest (as before) splitting everything between 2 worlds
>  - old world - no virtualization in ST-RAM, maybe in TT-RAM but shared 
> address space
>  - new world - fol ELFs only, fully vitrtualized with some ability to 
> interact with old world (fixed shared mem window ST-RAM?) and probably 
> redesigned GEM api (to suit virtual environment)
>
> As for GEMDOS, we could use trick used by other OSes (Linux, Windows) 
> where for each process, first 2GB is kernel space (and protected from 
> process access), and 2nd 2GB is process space (this should/could be 
> configurable). This simplifies transfering data between user/kernel space.
>
It sounds like we agree on the fundamental approach.  There is certainly 
no harm in trying this and I don't think the work will go to waste if I 
try to make it generalized enough.  We'll see!