[OpenBIOS] [RFC 2/3] ppc64: Switch to 64-bit cell size

Andreas Färber andreas.faerber at web.de
Sat May 28 14:03:31 CEST 2011

Am 28.05.2011 um 13:50 schrieb Alexander Graf:

> On 28.05.2011, at 13:48, Andreas Färber wrote:
>> Am 28.05.2011 um 13:42 schrieb Alexander Graf:
>>> On 28.05.2011, at 13:37, Andreas Färber wrote:
>>>> To avoid some of the cell size vs. pointer size issues,
>>>> use 64-bit cells on ppc64. Suggested by Segher.
>>>> This involves handling lack of 128-bit type and compiling
>>>> 64-bit libgcc parts, copied from sparc64.
>>>> Hopefully fixes compilation on 64-bit host, too.
>>> I thought ppc64 OpenFirmware uses 32bit cells?
>> That's what I thought, too... but Segher said otherwise in January,  
>> and Tarl said the internal cell size (that I'm trying to change  
>> here) were different from the guest-visible 32-bit cell size.  
>> Through the use of prog_arg_t the CIF is supposed to remain 32-bit.
> Oh, too quick in replying :). You're changing the "cell" type which  
> is used all over the place with sizeof() to figure out the cell size  
> of guest visible (device tree) fields. I don't see how it could not  
> be guest exposed.

So you're saying...? Do you oppose Segher? Or do you see a better way  
of doing this? :)
Blue and Kenneth were having compilation issues due to pointer size !=  
cell size, and I hoped this might solve the iso9660 issue (which it  
doesn't, unless I have missed some change).


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