Le 11/09/2015 23:07, Programmingkid a écrit :
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, qemu-discuss-request@nongnu.org mailto:qemu-discuss-request@nongnu.org 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Nostalgia: a seven years old thread, out of date now: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?
The patch is attached to the mail in the thread. Anyway, I don't think it applies now.
Laurent