ARM deprecate endian switching in ARMv7+ application (server) profiles. It is possible to do big endian but with external hardware assistance. We will be an LP64 little endian architecture with a relaxed memory model. Ping me with questions.
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-----Original Message-----
From: Peter Robinson [pbrobinson@xxxxxxxxx]
Received: Saturday, 23 Mar 2013, 15:35
To: Development discussions related to Fedora [devel@xxxxxxxxxxxxxxxxxxxxxxx]
Subject: Re: aarch64 bugs
On Sat, Mar 23, 2013 at 7:32 PM, Richard W.M. Jones <rjones@xxxxxxxxxx> wrote:
> On Sat, Mar 23, 2013 at 03:12:13PM +0000, Peter Robinson wrote:
>> On Sat, Mar 23, 2013 at 2:53 PM, Bruno Wolff III <bruno@xxxxxxxx> wrote:
>> > On Sat, Mar 23, 2013 at 09:14:52 -0500,
>> > Jeffrey Ollie <jeff@xxxxxxxxxx> wrote:
>> >>
>> >> Yesterday a bunch of bugs were opened up regarding aarch64 support in
>> >> some packages. I'd like to do my part in fixing these, but is there a
>> >> way to actually run test builds? I know that there's ARM support in
>> >> the works, but I haven't really kept up with the details.
>> >
>> >
>> > I was going to ask the same question.
>>
>> At the moment there is not. We're working on the platform bring up and
>> in the coming weeks there will an initial Fedora 19 based image
>> released that will be able to run on the free ARM Foundation model
>> [1]. Eventually there will be hardware available but I'm not sure when
>> that will be as there's not been anything publicly announced.
>> Ultimately we're very much in the prep stages for a mass rebuild of
>> Fedora for aarch64 when we eventually get actual HW, at the moment a
>> build of something like gcc takes days.
>>
>> Peter
>>
>> [1] https://fedoraproject.org/wiki/Architectures/ARM/AArch64/FoundationModel
>
> Peter,
>
> I spent a few minutes searching for details of AArch64, such as its
> endianness and what processor features (ie. 'flags' in /proc/cpuinfo)
> it has.
>
> It seems the endianness is switchable like MIPS, which I guess is a
> good thing. What endianness will Fedora use? What about other Linux
> distros?
We will be using little endian. All ARM processors have the ability to
switch endianness.
> Do you know what processor features ('flags') will be available in the
> first shipping hardware?
Nope, although I will find out, what particular bits do you need to
know, or just all of them?
Peter
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