Re: [Qemu-devel] [PATCH] target-arm: support for ARM1176JZ-s cores

[Jamie Iles <jamie@jamieiles.com>]

On Wed, Jun 22, 2011 at 05:01:30PM +0100, Peter Maydell wrote:
> On 22 June 2011 16:45, Jamie Iles <jamie@jamieiles.com> wrote:
> > On Wed, Jun 22, 2011 at 10:40:12AM +0100, Peter Maydell wrote:
> >> Mostly what I'd like is for the actual code implementing things to
> >> be gated on a fairly fine-grained set of flags, so that we can confine
> >> the "what does this core have? what things imply what other things?"
> >> code to a single place where it's easy to tweak if we get it wrong.
> >
> > OK, I don't think I can object to that!  I'll submit a patch to fix up
> > the v7 VMSA ap/remap dependency to be v6K rather than v7.  Given that,
> > do you have any objection to adding 1167 as a v6K?  I'm happy to help
> > with/test some of the feature cleanup.
> 
> I think the question is, if you mark the 1176 as a v6K then how do
> you gate the "working WFI from WFI instruction", which otherwise
> could reasonably be marked as one of the features implied by v6K?

The ARM1176 technically is a v6K core, but the actual definition of v6K 
seems a bit vague on required features.

As wfi is a valid encoding on 1176 I personally don't see this as being 
a blocking issue (though technically incorrect, though most code 
targeted for this CPU presumably wouldn't emit a wfi instruction?).

Jamie