Re: [OpenBIOS] [Qemu-discuss] Qemu-system-sparc: What would I need to change to add functionality to save the nvram content between boots ?

[Programmingkid]

On Sep 11, 2015, at 4:09 PM, Laurent Vivier wrote:
> Le 11/09/2015 20:01, Programmingkid a écrit :
> > On Sep 11, 2015, at 12:00 PM, [e-mail]
> >  wrote:
> > > On 10/09/2015 8:58 AM, Maximilian H. wrote:
> > > > Hello,
> > > >
> > > > I was looking into what parts would need change to save and restore the
> > > > nvram content for the qemu-system-sparc vm between boots.
> > > >
> > > > I see the code in hw/timer/m48t59.c that implements the nvram.
> > > >
> > > > So some questions arise, and before I spend too much time poking around
> > > > the still unknown code, I'd thought I ask first.
> > > > Command line processing starts in vl.c in the main fct there ? Can I
> > > >
> > > > add a command line argument there, say "-sparcnvram" ?
> > > > In hw/timer/m48t59.c has no functionality that I see from having a
> > > >
> > > > look at it (not in depth) to save or restore the nvram's contents for
> > > > sparc. Is there a general facility that qemu has that provides such a
> > > > functionality - i.e. is there a general qemu save and restore framework ?
> > > > Is there an example somebody could point me to that implements
> > > >
> > > > something similar ? Imitation is the sincerest of flattery ....
> > > > All the alarm and watchdog functionality that the m48t08 provides, is
> > > >
> > > > that used on sparc too ?
> > > > Besides what is in
> > > >
> > > > http://wiki.qemu.org/Documentation/GettingStartedDevelopers, is there
> > > > some qemu coding documentation to make it faster for somebody unfamilar
> > > > with qemu's code like me to be able to implement something ? I'd like to
> > > > spend a few evenings on this, produce a patch and move on.
> > > >
> > > > Thanks
> > > > BR
> > > > Max.
> >
> > This sounds like a good idea. Having OpenBIOS settings actually be saved
> > between boots
> > would make things more real.
> >
> > Mark, do you think it is possible for a QEMU command line option to
> > actually load the
> > saved OpenBIOS settings from a file and restore them into memory? I'm
> > thinking something
> > along the lines of -prom-memory <file name>.
>
> Nostalgia: a seven years old thread, out of date now:
>
> https://lists.gnu.org/archive/html/qemu-devel/2008-05/msg00002.html
> > Max, there is a project that you should probably look at called
> > OpenBIOS. It implements
> > an implementation of Open Firmware. Here is where more info can be
> > found: http://www.openfirmware.info/Welcome_to_OpenBIOS. If you do want
> > to implement this feature,
> > it would help to know how the BIOS is implemented.
>
> Laurent

Could you send the patch please?