On Sep 20, 2012, at 8:43 AM, Alexander Graf wrote: On 20.09.2012, at 14:37, Programmingkid wrote: Message: 7
Date: Thu, 20 Sep 2012 11:36:46 +0200
From: Alexander Graf <address@hidden>
To: Andreas Tobler <address@hidden>
Cc: The OpenBIOS Mailinglist <address@hidden>, qemu-ppc List
<address@hidden>, Andreas F?rber <address@hidden>, Segher
Boessenkool <address@hidden>
Subject: Re: [Qemu-ppc] [OpenBIOS] FreeBSD powerpc issue
Message-ID: <address@hidden>
Content-Type: text/plain; charset=iso-8859-1
On 31.08.2012, at 22:40, Andreas Tobler wrote:
On 27.08.12 23:51, Alexander Graf wrote:
On 27.08.2012, at 13:43, Segher Boessenkool <address@hidden> wrote:
How do I flush the TLB?
]
Ah, I see. It depends. QEMU doesn't provide any guarantees that the TLB survives basically. We don't flush it often for book3s, but it can still happen. Maybe try to put a printf into the tlb flush handler function?
Sorry for the delay, was sick for the past days :(
You suggest to add some printf's, am I right to do that in the cputlb.c tlb_flush()? If not, where did you mean to do that?
Yup. tlb_flush_page and/or tlb_flush.
And on a side note, are/were there successful boot results from other OS's than linux with qemu and OpenBIOS on powerpc?
Phew. With a bunch of hacks I've had Mac OS X booted into its kernel where it was happily churning along until it realized that I'm trying to run it on machine that was too old (g3 beige support got dropped as early as 10.3 iirc). You were able to make Mac OS X boot in Qemu! What exactly is need to accomplish this? What version of Mac OS X did you use?
I was using 10.3 or 10.4 and simply added some hack to emulate forth sniplets in C. IIRC I even posted that on the mailing list back then:
I imagine that we need to start emulating a newer Mac than a Beige G3. Is the Mac99 target any better than the Beige G3?
It's better, but incomplete :(. We don't have any good targets atm. In fact, we might be best off implementing a U4 based G5 machine, as that one's at least documented.
Alex
Thanks for the link. From what I read, a word called unselect-dev is not yet implemented in OpenBIOS. Local variable support is missing, and an endless loop involving isi and dsi faults takes place.
From what I can tell, the unselect-dev word has been implemented. Local variable support has been implemented (still waiting for patch to be added). That leaves these isi and dsi faults. Are they still a problem? Any direction on what to work on next would be great.
I tried to boot Mac OS 10.4 on Qemu, but Qemu can't read the DVD. Not sure if I did something wrong, or if DVD support isn't implemented yet.
|