Re: [Xen-devel] Re: Sparc32/64 porting effort, interest?

[Jimi Xenidis <jimix@xxxxxxxxxxxxxx>]

On Aug 12, 2006, at 12:33 AM, Pete Zaitcev wrote:

> On Wed, 09 Aug 2006 18:27:49 +0200, "Blue Swirl"  
> <blueswir1@xxxxxxxxxxx> wrote:
> > > Your first task, is to port the zilog UART :)
> > Zilog is trivial, I can reuse OpenBIOS or Proll code for example.  
> > No sweat.
No, I mean a Zilog driver "in the Hypervisor" so you can get console :)
I'd borrow the linux code.
Since we are interested in zilog for PPC (use a lot by apple) we have  
had some luck with  a driver that came with maria's patch:
  http://lists.xensource.com/archives/html/xen-ppc-devel/2006-05/ 
msg00028.html
I only ask that we work together and not have 3 99% identical zilog  
driver like linux currently has.

> PROLL does not emulate Zilog. It only sets up the OF tree
> and leaves the OS free to use it. So, PROLL's code is fairly
> useless for your purpose. OpenBIOS, I do not know.
>
> But I do not see any need to emulate zs at all, if you plan
> for paravirtualization. Just add a driver to Linux for some
> kind of /dev/hvc (bonus points for making it compatible with
> PPC64).
the Doms will just use hcalls.

-JX


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