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Re: [Qemu-devel] Arm big endian?
From: |
Rob Landley |
Subject: |
Re: [Qemu-devel] Arm big endian? |
Date: |
Thu, 3 Jun 2010 18:25:03 -0500 |
User-agent: |
KMail/1.11.2 (Linux/2.6.28-18-generic; KDE/4.2.2; x86_64; ; ) |
On Thursday 03 June 2010 02:52:03 Paul Brook wrote:
> > I'm trying to get arm big endian support to work. I patched the 2.6.33
> > kernel to pretend that good old versatilepb can have a big endian CPU
> > plugged into it (attached), and then I built a kernel with the attached
> > .config, and qemu went "boing":
>
> That's about the result I'd expect. The fact that neither qemu nor linux
> claim to support big-endian mode for this hardware should be your first
> clue.
Understood. I there a better emulation to try?
When you say "this hardware" do you mean the board, or do you mean big endian
arm as a CPU? Because there _is_ a qemu-armeb. There isn't a qemu-system-
armeb that I'm aware of, but I thought it autodetected endianness at least for
the CPU...)
If it's the board, I did that because versatilepb has essentially been the
generic board emulation I've plugged all the other arm variants into. There
isn't a -M ip4xx that I'm aware of. (I can try configuring a kernel with just
serial console and see if I can get that to boot, and then add back net and
disk and such one at a time, if that might be a reasonable approach...)
> > Does this look more like a kernel error, or a qemu error?
>
> Probably both.
If I could just get them to agree, I'd be happy. I just want a setup that can
run a big endian arm userspace under system emulation (with network, serial
console, clock, and disk). Emulating a feasible board would be a nice bonus,
but not actually a goal.
> Paul
Rob
--
Latency is more important than throughput. It's that simple. - Linus Torvalds