From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yoann Padioleau <pad@fb.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Date: Mon,  9 Jun 2014 07:40:27 +0000
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References: <fa047f99e97ff75b0281c111daa222fc@hamnavoe.com>
In-Reply-To: <fa047f99e97ff75b0281c111daa222fc@hamnavoe.com>
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Subject: Re: [9fans] 9pi on qemu failure
Topicbox-Message-UUID: f8aafae4-ead8-11e9-9d60-3106f5b1d025

Hi,

I have a raspberry pi :) but I've found it incredibly convenient to have an=
 emulator
to test things. The development iterative loop is far faster when you can c=
ross-compile
from your pc and test directly on your pc. Then once it works you can deplo=
y
and test on the real machine. Anyway, I understand it would be complicated
to make plan9 works on qemu for arm1176.

On Jun 8, 2014, at 9:02 AM, Richard Miller <9fans@hamnavoe.com> wrote:

>>> This works though with a linux kernel compiled for the raspberry, e.g.
>>> from https://urldefense.proofpoint.com/v1/url?u=3Dhttp://xecdesign.com/=
qemu-emulating-raspberry-pi-the-easy-way/&k=3DZVNjlDMF0FElm4dQtryO4A%3D%3D%=
0A&r=3D%2FN9d7W2LRwZks3eyFNLr8Q%3D%3D%0A&m=3DxtUc%2B%2BLTD9Nd9zDzA3%2BHrYrg=
6YJxYvceJz4dKM6VilU%3D%0A&s=3Daafa0b698d8faa75b24756ff8567b8699fd2686c0d385=
62cc6c97e5a00bcf362=20
>>> wget https://urldefense.proofpoint.com/v1/url?u=3Dhttp://xecdesign.com/=
downloads/linux-qemu/kernel-qemu&k=3DZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=3D%2=
FN9d7W2LRwZks3eyFNLr8Q%3D%3D%0A&m=3DxtUc%2B%2BLTD9Nd9zDzA3%2BHrYrg6YJxYvceJ=
z4dKM6VilU%3D%0A&s=3Dbbec0427d0c6670d2da7f7bb614919390a9829436af5205dc85696=
cf4cb582e5
>=20
> I would bet that linux kernel isn't actually configured for the
> raspberry pi -- it will be for a generic arm1176.  The pi's processor isn=
't
> an arm1176 exactly; it's a Broadcom bcm2835 videocore gpu, with an arm
> core grafted on.  It's highly unlikely that qemu knows how to emulate
> this well enough for a native bcm kernel like 9pi to run successfuly.
> The "emulating raspberry pi the easy way" is not really emulating the
> pi, just using a generic arm kernel to run linux software from a
> raspberry pi linux distribution image.
>=20
> If you want to run 9pi, I recommend buying a raspberry pi.  They aren't
> expensive, and native Plan 9 is a much more rewarding experience.
>=20
>=20