Date: Tue, 13 Sep 2016 20:11:31 +0300 From: "Jukka A. Ukkonen" <jau789@gmail.com> To: freebsd-ppc@freebsd.org Subject: Re: [Bug 205458] 11.0-CURRENT/10-STABLE powerpc64: a PowerMac G5 specific sys/powerpc/ofw/ofw_machdep.c change for reliable PowerMac G5 booting (with lots of RAM) Message-ID: <3c513eea-cd94-7065-87b8-5200490b97c3@gmail.com> In-Reply-To: <bug-205458-21-34YnzZWuVY@https.bugs.freebsd.org/bugzilla/> References: <bug-205458-21@https.bugs.freebsd.org/bugzilla/> <bug-205458-21-34YnzZWuVY@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] On 09/13/16 09:31, bugzilla-noreply@freebsd.org wrote: > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205458 > > --- Comment #5 from Mark Millard <markmi@dsl-only.net> --- > Nathan Whitehorn has put out a kernel patch that he is asking for help with > testing on PowerMac/iMac G5 variations. See: > > https://lists.freebsd.org/pipermail/freebsd-ppc/2016-September/008413.html > > The patch is not just using __powerpc64__ instead of POWERMAC_G5_SPECIFIC_BUILD > in my presentation of my hack. > > Nathan has already tested a PowerMac11,2. > > If anyone reading this has any other type(s) of Apple G5's and is willing/able > it would be good to get in some testing before the change is made to the > kernel. > > I expect that it does not mater much which version/variation of 10.x, 11.0, or > 12 is used if the original boot problems can sometimes be observed before the > change. Although I'm not sure of the patch automatically applies nicely to all > possible vintages of those. > > > As for me. . . > > It will be a few weeks before I'll again have access in order to test a > PowerMac7,2 (or to independently repeat PowerMac11,2 testing). I'll not have > access to other Apple G5's. So my range of testing will be rather limited and > will not be soon. > Following Mark's advice I tried an alternate change and now at least my PowerMac7,3 boots just fine through the autoconfigure phase. The first hiccup I see is with tmpfs mount to /tmp, but that, I hope, it is a completely unrelated issue. The patch I am now using on my PowerMac G5 is attached. The modification is Mark's, I just tested it. I don't have the foggiest idea where and how he figured out this change, but at least in my test on one system only it seems to work wonders. --jau PS. If someone knows why the tmpfs has started complaining mount: tmpfs: Operation not supported by device where it previously (last 11.0-BETA2) worked just fine, let me know. [-- Attachment #2 --] Index: sys/powerpc/ofw/ofw_machdep.c =================================================================== --- sys/powerpc/ofw/ofw_machdep.c (revision 305763) +++ sys/powerpc/ofw/ofw_machdep.c (working copy) @@ -112,12 +112,11 @@ * SPRG1-3 could be trashed */ __asm __volatile("mfsprg0 %0\n\t" - "mtsprg0 %1\n\t" - "mtsprg1 %2\n\t" - "mtsprg2 %3\n\t" - "mtsprg3 %4\n\t" + "mtsprg1 %1\n\t" + "mtsprg2 %2\n\t" + "mtsprg3 %3\n\t" : "=&r"(ofw_sprg0_save) - : "r"(ofmsr[1]), + : "r"(ofmsr[2]), "r"(ofmsr[3]), "r"(ofmsr[4]));
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3c513eea-cd94-7065-87b8-5200490b97c3>