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[Xen-ia64-devel] Re: [Xen-devel] [RFC][PATCH]mini-os: big-endian mini-os

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: [Xen-ia64-devel] Re: [Xen-devel] [RFC][PATCH]mini-os: big-endian mini-os on ia64
From: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxxxxxxx>
Date: Wed, 28 Feb 2007 11:14:54 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Grzegorz Milos <gm281@xxxxxxxxx>, Xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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Am Mittwoch, 28. Februar 2007 09:42 schrieb Keir Fraser:
> On 28/2/07 08:21, "Dietmar Hahn" <dietmar.hahn@xxxxxxxxxxxxxxxxxxx> wrote:
> > Currently we have a prototype of our OS (BS2000 - S/390 like mainframe
> > os) running in big-endian mode on ia64 hardware.
>
> Couldn't you run BS2000 in little-endian mode? How hardcoded is the
> endianness assumption (e.g., all over your ia64-specific additions)?
No, BS2000 in little-endian mode is not possible. We talk about millions of  
lines of code and billions of dollars customer application software. It's 
much better to prepare the base for big-endian.
Thanks.

Dietmar.

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