Date: Tue, 22 Dec 2020 14:17:36 -0500 From: Dennis Clarke <dclarke@blastwave.org> To: freebsd-ppc@freebsd.org Subject: Re: Old PowerMac G5 2-socket/2-cores-each: head -r368820 kernel reports: bus_dmamem_alloc failed to align memory properly Message-ID: <33f350be-79f3-29d5-6d64-33238f8c8613@blastwave.org> In-Reply-To: <4b846361-8c15-46a1-8932-8769ca82f49b@www.fastmail.com> References: <FE22D733-35A2-4FB4-83D7-1E953A53AC34.ref@yahoo.com> <FE22D733-35A2-4FB4-83D7-1E953A53AC34@yahoo.com> <40dead6f-2a69-cf74-0a23-cde56dd90510@blastwave.org> <53f15d43-62c3-e12c-f8db-ede6a30e4e95@blastwave.org> <46726BE0-00FF-4DE7-835B-C7B04F3B0693@yahoo.com> <04727338-1ecb-4a94-c8e9-dcef7abd1513@blastwave.org> <c7cdeed2-57a7-4d48-91bd-4e0eb26c5313@www.fastmail.com> <4b846361-8c15-46a1-8932-8769ca82f49b@www.fastmail.com>
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>> >> Try the following in openfirmware before booting: >> >> dev /memory@0 100000 1000 do-unmap >> Getting to the OpenFirmware prompt is a real pain with a PC keyboard but I will see if I can figure out the Vulkan salute finger combination. >> There are certain versions of OpenFirmware that leave a page mapped >> with the wrong protections erroneously and this smells like that bug to >> me. > > In fact, given the srr0 value in the fault, I am *certain* this is your problem. > Lovely. > You can use nvedit to make this bugfix permanent for a given machine (We don't have our own guide, but the NetBSD guide @ https://www.netbsd.org/ports/macppc/nvedit.html is usable to apply this patch.) > I assure you that I have no idea at all what you are talking about. Dennis
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