Re: How to access VRAM physical address on L4 ?

It said there:
Physical memory lying in the kernel area (i.e., beyond 3GB) cannot be mapped
idempotently. You need to remap that memory to a virtual address in user
area. You can do so by leveraging sigma0's RPC protocol (see the spec,
chapter 7.6), requesting sigma0 to map the VGA or other device memory to a
specified virtual address.

Our own pager not sigma0 can do these map?


Philipp Kupferschmied wrote:
> 
> Hi,
> 
> there had been a similar question on the list a few month ago, so perhaps
> this old discussion can help you with your problem:
> https://lists.ira.uni-karlsruhe.de/pipermail/l4ka/2008-February/002042.html
> 
> Cheers,
> Philipp
> 
> 
> 

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