On 11/13/2014 02:12 PM, Magnus Ihse Bursie wrote: > I was a bit surprised to see that VAR_CPU_ARCH is set to "aarch64" and > not "arm". The meaning of the CPU_ARCH variable is supposed to cover > platforms with similar architecture, regardless of address size. But > maybe I'm just too unfamiliar with aarch64, and it is not a trivial > 64-bit extension of arm, but more like a separate platform?
It is a completely new architecture. Almost the only thing it has in common with ARM is that it's from the same company. It is possible to run an AArch64 CPU in ARM mode, but there is no interworking. Andrew.
