Re: qemu for rpi emulation

[Jeff Rizzo <riz%tastylime.net@localhost>]

On 8/13/13 10:53 AM, Sergio López wrote:
> 2013/8/13 matthew sporleder <msporleder%gmail.com@localhost>:
> > Is there a way to use qemu to emulate netbsd/rpi?
> > If not, what's missing?
> QEMU doesn't emulate quite the same hardware that RPi bundles in its
> SoC, but you can use the Integrator CP board emulation
> (qemu-system-arm -M integratorcp -cpu arm1136...) and an INTEGRATOR_CP
> kernel with the common evbarm userland.
>
> The only significant drawback is that there's no SD/MMC support, so
> you have to export your root filesystem via NFS from your host machine
> (which is quite convenient is you're planning to do some tweaks on the
> userland).
>
> Sergio.

Sergio-

It would be helpful if you could write up (or help me, and I'll write 
up) the steps to get things booted using kernels from releng.netbsd.org 
- this way people can check whether things are broken for everyone, or 
just them.  :)

For example, I just tried using the INTEGRATOR_CP kernel from -current 
(since it looks like it's not in 6.1, which makes some sense) with 
pkgsrc qemu:

slash:riz  ~> qemu-system-arm --version
QEMU emulator version 1.4.2, Copyright (c) 2003-2008 Fabrice Bellard
slash:riz  ~> ftp 
http://nyftp.netbsd.org/pub/NetBSD-daily/HEAD/201308140140Z/evbarm/binary/kernel/netbsd-INTEGRATOR_CP.ub.gz
Requesting 
http://nyftp.netbsd.org/pub/NetBSD-daily/HEAD/201308140140Z/evbarm/binary/kernel/netbsd-INTEGRATOR_CP.ub.gz
100% |***********************************|  1227 KiB  306.96 KiB/s    
00:00 ETA
1256492 bytes retrieved in 00:03 (306.96 KiB/s)
slash:riz  ~> gunzip netbsd-INTEGRATOR_CP.ub.gz
slash:riz  ~> qemu-system-arm -M integratorcp -cpu arm1136 -m 128m 
-kernel ./netbsd-INTEGRATOR_CP.ub -nographic

NetBSD/evbarm (EVBARM_BOARDTYPE) booting ...

...and it hangs there until I quit qemu.  Now, I'm not exactly sure 
where the problem is.  QEmu?  The particular kernel?  The way I ran it?

Any insight is helpful...

Thanks!
+j