RE: HELP: Is writeq an atomic operation??

Moore, Eric
2008-05-02T22:50:24Z

> >
> > The answer to this question this is platform dependent.
> >
> > On most 64-bit platforms, it is. On some 32-bit ones, it is not.
>
> Are there any 32-bit platforms with writeq()? A quick grep
> suggests not.

I think writeq defined in include/asm-x86/io_64.h

>
> Are there any 64-bit platforms where writeq() allows the MMIO to be
> split into multiple cycles from the target device's view? I've been
> coding assuming that at least no other MMIO writes will reach
> the device
> in the middle of a writeq().
>

I hope that is the case.