Re: PowerPC 970 (G5) 64-bit support

[Super Bisquit <superbisquit%gmail.com@localhost>]

That should be a kernel only question


On 4/11/11, Dennis Ferguson <dennis.c.ferguson%gmail.com@localhost> wrote:
> On 11 Apr 2011, at 15:26 , Erik Fair wrote:
>> Are the required changes sufficient to warrant a new port, e.g. macppc64?
>
> There actually sort of is one: search for macppc64 in build.sh, that's
> how you build a 64-bit user space.
>
> There is the slightly different question of whether the ultimate
> end state, once someone got around to completing the 64 bit support,
> would need to split the powerpc directory in sys/arch in a way analogous
> to i386/amd64/x86.  I don't know the answer to that, but I'm pretty
> sure you wouldn't want to do that before there was someone actually
> writing that code.  Right now all the 64 bit support there is exists
> as #ifdef's in the files in sys/arch/powerpc/, and there's no better
> place for it at the moment: the support is entirely theoretical, anyway,
> so keeping it in the same files as code people actually use for something
> makes it slightly more likely that there would at least be some attempt
> to keep it "theoretically" up-to-date.  I'm not sure whether the
> one-directory-does-both arrangement could be maintained once someone
> got around to writing support for 64-bit kernel functions that don't have
> equivalents in 32-bit kernels (e.g. netbsd32_* code), but it would be
> better to wait and find that out from the (theoretical) person who
> is trying to complete that support.
>
> Dennis Ferguson
>
>