Re: [Qemu-devel] [PATCH RFC for-1.2] arm: Move some ARM devices into libhw

["Andreas Färber" <afaerber@suse.de>]

Am 02.08.2012 17:01, schrieb Peter Maydell:
> On 2 August 2012 15:53, Andreas Färber <afaerber@suse.de> wrote:
>> In practice, it seemed that usage of these devices is rather fragmented
>> (not all boards use all PLxxx devices) so that per-device config names
>> as in master allow for fine-grained control of which devices get built
>> if only armeb-softmmu were to be built;
>> on the other hand if that seems too complicated the alternative question
>> to ask would be, are all PLxxx devices theoretically capable of being
>> used for armeb as well?
> 
> They should in theory be OK on a big-endian system, but then in theory
> just about any device should be OK on a big endian system: device/system
> endianness and CPU endianness are orthogonal.

I was specifically thinking of whether the specified device endianness
is correct, i.e. whether device code assumes Little Endian but might be
marked DEVICE_NATIVE_ENDIAN (thus becoming Big Endian on armeb) or is
marked DEVICE_LITTLE_ENDIAN but should be DEVICE_NATIVE_ENDIAN to adapt
to armeb (e.g., double-swapping issues with IBM8514 card a while ago).

Andreas

-- 
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer; HRB 16746 AG Nürnberg