> There is an interest in supporting PowerPC 970 ("G5"). That would
> allow people to use more than 2G of RAM on the last generations of
> Apple PowerMac machines. Otherwise I don't think we are interested in
> anything before POWER8.
Years ago, a decision was made to ditch 64-bit PA-RISC (mostly because
toolchain limitations for 64-bit userland) and keep running a 32-bit
kernels on 64-bit PA-RISC systems with a 32-bit PDC.
Before that, mickey@ was adamant that earlier hppa64 systems (pre-astro)
with 32-bit PCI busses and no way to have more than 2GB of memory (such
as C240) were not worth supporting in 64-bit mode.
At about the same time, it was also decided that G5 systems with more
than 2 or 3 GB of memory were rare enough not to be worth supporting in
64-bit mode.
Given the current "3GHz and gobs of ram or dust" party's line those days,
I don't see a point in attempting to support G5 systems in 64-bit mode,
if this seriously impacts support for sexier^Wmore modern designs.
