Re: Porting to IBM Risc 6000

[Jochen Kunz <jkunz%unixag-kl.fh-kl.de@localhost>]

On 2002.08.09 16:34 David Edelsohn wrote:

>       PReP is not the same as CHRP. 
Yes, of course. My question was more like "Are they similar enough to
support them with a single NetBSD port?" I don't know PReP and CHRP
internas yet. I started to read the CHRP spec to get an overview... 

> PReP machines do not have the same
> Open Firmware device tree, client services, and RTAS. 
[...]
>       RPA is the IBM-specific continuation of CHRP.
>  It supports Open Firmware (device tree, client services, RTAS), 
> but it may have different devices than specified in the CHRP 
> specification.  It may use different interrupt controllers 
> (not OpenPIC), etc.
So we would end with port-prep for the PReP only machines and port-chrp
(port-rpa?) for CHRP and RPA machines? And perhaps an additional
port-chrp64 for 64 bit CHRP/RPA machines? Analogus to port-sparc and
port-sparc64? (I know I can ask a lot of stupid questions. ;-) )

And where to get the RPA spec? PReP and CHRP are at 
ftp://ftp.software.ibm.com/rs6000/technology/spec/ 
-- 



tschüß,
         Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/