[uClinux-dev] QEMU and ColdFire

[Greg Ungerer]

Hi All,

It seems QEMU has support for ColdFire, has anyone here been using it?

It seems it is a little broken when trying to run the very most recent
linux kernels. Here are some patches that will fix that:

http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01954.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg02099.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01956.html

Those patches applied to the latest qemu git tree, though I suspect
they should apply to v1.2 qemu source without too much trouble.

Then you can emulate a ColdFire M5208EVB board and run current kernels
on it. I have been running linux-3.5 kernels.

If you don't want to start up with gdb support then you need to generate
a kernel object that contains an initrd (which is not normally generated
by the uClinux-dist build system). With that you then simply run it
with:

qemu-system-m68k -nographic -machine mcf5208evb -kernel vmlinux

Could be kinda useful.

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer -- Principal Engineer EMAIL: gerg at snapgear.com
SnapGear Group, McAfee PHONE: [phone]
8 Gardner Close FAX: [phone]
Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com

[Ezequiel Garcia]

Post by Greg Ungerer
Hi All,
It seems QEMU has support for ColdFire, has anyone here been using it?
It seems it is a little broken when trying to run the very most recent
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01954.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg02099.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01956.html
Those patches applied to the latest qemu git tree, though I suspect
they should apply to v1.2 qemu source without too much trouble.
Then you can emulate a ColdFire M5208EVB board and run current kernels
on it. I have been running linux-3.5 kernels.
If you don't want to start up with gdb support then you need to generate
a kernel object that contains an initrd (which is not normally generated
by the uClinux-dist build system). With that you then simply run it
qemu-system-m68k -nographic -machine mcf5208evb -kernel vmlinux
Could be kinda useful.

Indeed!

Is this emulating a mmuless machine?

Thanks,
Ezequiel.

[Greg Ungerer]

Hi Ezequiel,

Post by Ezequiel Garcia

Post by Greg Ungerer
It seems QEMU has support for ColdFire, has anyone here been using it?
It seems it is a little broken when trying to run the very most recent
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01954.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg02099.html
http://lists.nongnu.org/archive/html/qemu-devel/2012-09/msg01956.html
Those patches applied to the latest qemu git tree, though I suspect
they should apply to v1.2 qemu source without too much trouble.
Then you can emulate a ColdFire M5208EVB board and run current kernels
on it. I have been running linux-3.5 kernels.
If you don't want to start up with gdb support then you need to generate
a kernel object that contains an initrd (which is not normally generated
by the uClinux-dist build system). With that you then simply run it
qemu-system-m68k -nographic -machine mcf5208evb -kernel vmlinux
Could be kinda useful.

Indeed!
Is this emulating a mmuless machine?

Yes, it is emulating a ColdFire 5208. That is a version 2 ColdFire
core, so no MMU.

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer -- Principal Engineer EMAIL: gerg at snapgear.com
SnapGear Group, McAfee PHONE: [phone]
8 Gardner Close, FAX: [phone]
Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com