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

[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.


Alex