[OpenBIOS] OpenBios Sparc64

Ghitulete Razvan razvan.ghitulete at gmail.com
Fri Aug 5 14:56:40 CEST 2011

I meant OpenBOOT, as I am trying to write something for a V9 and qemu
doesn't have full suport for the V9 arch. But as far as i've noticed
the openbios implementation resembles the openboot one. Anywho I
managed to get passed this. It seems it was because I had the
processor in a wrong state. But now I ran into some other problems, as
it seems if I call the "finddevice" CIF command for any node, instead
of getting a valid phandle, or an -1 in case i ask for gibberish(which
i did). The CIF keeps returning the address to the string I passed as
an argument (said device that i am searching).

On Fri, Aug 5, 2011 at 2:24 PM, Mark Cave-Ayland
<mark.cave-ayland at siriusit.co.uk> wrote:
> On 04/08/11 15:39, Ghitulete Razvan wrote:
>> I've written several lines of code in C in which I am trying to access
>> the OpenBoot CIF to execute an instruction. But immediately after I do
>> the call to the CIF interface address the PROM freezes. Does anyone
>> have any ideas why is this so. I'm getting the CIF address from the
>> %o4 register passed by SILO
> Do you really mean OpenBoot or do you mean OpenBIOS?
> There was a bug in earlier versions of OpenBIOS where the CIF arguments were
> being read in the wrong order which is now fixed. Basically as you read the
> IEEE 1275 specification, left -> right maps to bottom -> top of stack so it
> may just be that you need to reverse the order of your arguments.
> Also if you are using OpenBIOS, you can enable DEBUG_CIF in
> libopenbios/client.c which will output all the CIF calls and their arguments
> on the console to help you.
> HTH,
> Mark.
> --
> Mark Cave-Ayland - Senior Technical Architect
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Razvan Ghitulete
Universitatea Politehnica Bucuresti

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