[OpenBIOS] [PATCH v2] Implement copy-resolutions-property

[Tarl Neustaedter]

On 2016-Oct-1 20:47 , G 3 wrote:
>
> Actually the Mac OS gets all its information from the VGA driver. It
> would be
> the VGA driver that would read the list in OpenBIOS. Currently the VGA
> driver
> needs the list to an array of integers.


O.k. - misunderstood. The new VGA driver is a MacOS driver, not a
OpenBIOS driver. So we aren't booting standard MacOS, but a modified
version.

The traditional way information is passed (for IEEE1275 in Sun/Oracle
style) from the outside world into drivers/operating systems is with
properties in either /chosen or /options. Properties in /options mimic
NVRAM variables, looking like they might have been set by the previous
iteration of an operating system - that's probably not ideal, it might
appear that the client OS could set them, which wouldn't be the case.
Properties in /chosen are places where firmware stores anything it
determines at startup for use by later clients.

I would suggest in this case that /chosen would be your better location
than a device node.