Date: Tue, 24 May 2016 14:46:39 -0700 From: Mark Millard <markmi@dsl-only.net> To: mmel@freebsd.org, freebsd-arm <freebsd-arm@freebsd.org> Cc: otacilio.neto@bsd.com.br, Ian Lepore <ian@FreeBSD.org> Subject: Fwd: xorg broken on Beaglebone black revision 300438 Message-ID: <7700894B-58F5-4EAE-89BC-B2CEC3AFA7EF@dsl-only.net> References: <AE62E2F1-1D9F-418F-97E8-6D7F0E6B4B87@dsl-only.net>
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I forgot to CC mmel for the below reply to: https://lists.freebsd.org/pipermail/freebsd-arm/2016-May/013910.html and https://lists.freebsd.org/pipermail/freebsd-arm/2016-May/013911.html mmel is listed for the -r295256 that I referenced. === Mark Millard markmi at dsl-only.net Begin forwarded message: > From: Mark Millard <markmi at dsl-only.net> > Subject: Re: xorg broken on Beaglebone black revision 300438 > Date: May 24, 2016 at 2:35:21 PM PDT > To: freebsd-arm <freebsd-arm at freebsd.org>, otacilio.neto at bsd.com.br > Cc: Ian Lepore <ian at FreeBSD.org> > > Quoting from Otacílio Tue May 24 00:06:10 UTC 2016 and its locore-v6.S changes: > >> - orr r7, #CPU_CONTROL_UNAL_ENABLE >> - orr r7, #CPU_CONTROL_AFLT_ENABLE >> + bic r7, #CPU_CONTROL_UNAL_ENABLE >> + bic r7, #CPU_CONTROL_AFLT_ENABLE > > -r295256 (2016-Feb-14) changed from: > > bic r7, #CPU_CONTROL_UNAL_ENABLE > > to: > > orr r7, #CPU_CONTROL_UNAL_ENABLE > > in two places (moving it a few lines down for each example as well). So this much of the proposed changes would be reverting the -r295256 change. The check in comment indicates the bit is RAO/SBOP for armv7. For armv6 the check in comment claims it controls armv5 compatible alignment support. > > But: > > orr r7, #CPU_CONTROL_AFLT_ENABLE > > has been in locore-v6.S since the file's first checkin. So this change to bic here be new. > > What is the FreeBSD intent for each of the two new settings for armv7? armv6? > > > === > Mark Millard > markmi at dsl-only.net > >help
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