[OpenBIOS] [RFC] PowerPC Mac OS on Qemu

William Hahne will07c5 at gmail.com
Wed Aug 10 02:05:39 CEST 2011

Please disregard this post. I failed to properly split it up and I have
reposted everything in it.

William Hahne

On Tue, Aug 9, 2011 at 2:46 PM, William Hahne <will07c5 at gmail.com> wrote:

> Hello,
> I am a Google Summer of Code student working on getting PowerPC Mac OS
> running on Qemu. While I am not finished I need to upstream what I currently
> have before the end of Summer of Code. My patch is for OpenBIOS but I am
> cross-posting to both Qemu and OpenBIOS mailing lists since it is useful to
> get feedback from both.
> One part of the patch I am particularly concerned about is the patch to
> arch/ppc/qemu/init.c to provide a CPU and Timebase frequency. Qemu doesn't
> report a CPU frequency and the reported Timebase frequency is too high and
> causes the Mac OS scheduler to break. I hard-coded values that work but this
> seems like an unacceptable long-term solution to me. A simple test for CPU
> frequency might be the best solution here but seems a little redundant as
> Mac OS later runs its own test, seemingly only relying on these values
> during initialization (I am not 100% sure of this since it crashes before
> reaching that point.) Feedback here would be especially appreciated.
> Another thing to note is in drivers/adb_kbd.c. "get-key-map" which returns
> a map of the current pressed keys on the keyboard just returns a dummy
> value. I felt it was a waste of time making a full implementation when all
> it really gets you is the ability to use keyboard shortcuts for verbose or
> single user mode.
> Other than those specific concerns I welcome general feedback on the patch,
> since as I said I am hoping to get it in before the end of Summer of Code.
> Thanks,
> William Hahne
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