[OLPC-devel] Re: 2316 revisions

[Jordan Crouse]

On 16/06/06 15:56 -0600, Tom Sylla wrote:
> Richard Smith wrote:
> >>For *LinuxBIOS*, I would make sure its reporting of the memory map is
> >>proper, instead of fixing it up with the mem= parameter. I would expect
> >>the LinuxBIOS map to be much simpler, since it may not have ACPI, and
> >>may not even need to reserve the BIOS shadow regions.
> >
> >That will depend on how the video chip gets turned on and how you have
> >to talk to it.  I'm still coming up to speed on the OLPC hardware but
> >am I correct that the VSA inits the video device?  If so then it may
> >need the legacy shadows ranges to work correctly since I bet it acts
> >like a standard vbios.
> 
> There is no video BIOS. The current plan (and the way it is working 
> right now) is that the SoftVG VSM does only what setup is needed to 
> allow the FB driver to load. No VESA, no VGA, no VGA BIOS.

You type faster then I do... :)    Thats exactly right - all the 
VSA does is set up the memory descriptors and region configurations, 
and gets out of town.  All video related activity in the kernel is handled
by the framebuffer driver. 

Jordan