RTAS on PowerMac Newworld

[FASSINO Jean-Philippe]

Benjamin Herrenschmidt wrote:

> >
> >Just a question about RTAS on PowerMac G4,
> >does linux kernel can call RTAS function ?
> >And if not, why ?
> >I'm trying to do it and that fail...
>
> RTAS in not correctly implemented in those machines. Apple is apparently
> abandonning it, the implementation in ROM for all core99 machines is
> bogus. What do you want to use RTAS for ?

In the kernel for PPC, a lot a code is here just to do what doing RTAS :
pci config,
via (CUDA and PMU) (no need if no ADB keyboard), ...
When doing embedded systems, this drivers is very big and can be saving by
using
RTAS which i think is a very good thing in  CHRP specification. It's
strange that
apple do not provide it fully.

JP




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 Jean-Philippe FASSINO              France Telecom R&D : DTL/ASR
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