[OpenBIOS] How to pass CIF chain arguments on SPARC64?

Tarl Neustaedter tarl-b2 at tarl.net
Fri Apr 4 20:15:10 CEST 2014

On 2014-Apr-4, 09:53 , Mark Cave-Ayland wrote:
> I'm working on implementing a version of the CIF chain service for 
> SPARC64 

Hmm. I note that in current Openboot, there is no CIF for "chain". It's 
commented out.

> How are the arguments passed to the next client program? A quick peek 
> at the OpenBOOT source shows that (init-program) only sets up %o4 
> (CIF) and %o6 (stack) registers. Does that mean that the arguments 
> should be copied onto the stack or somehow via the registers? 
> Unfortunately I can't seem to find a suitable 64-bit SPARC IEEE1275 
> ISA document anywhere :(

Where does your client program expect the arguments?

The client programs I'm familiar with all fetch their arguments from 
properties in /chosen, don't expect things on the stack.

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