Date: Mon, 9 Dec 2013 17:39:52 +0200 From: Aleksandr Rybalko <ray@ddteam.net> To: Marius Strobl <marius@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r259102 - head/sys/sparc64/sparc64 Message-ID: <20131209173952.d6e3d3fb0fb5c9e84bc41bfb@ddteam.net> In-Reply-To: <201312081525.rB8FPJK0023252@svn.freebsd.org> References: <201312081525.rB8FPJK0023252@svn.freebsd.org>
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On Sun, 8 Dec 2013 15:25:19 +0000 (UTC) Marius Strobl <marius@FreeBSD.org> wrote: > Author: marius > Date: Sun Dec 8 15:25:19 2013 > New Revision: 259102 > URL: http://svnweb.freebsd.org/changeset/base/259102 > > Log: > Restore a vital comment nuked in r259016. > > Modified: > head/sys/sparc64/sparc64/machdep.c > > Modified: head/sys/sparc64/sparc64/machdep.c > ============================================================================== > --- head/sys/sparc64/sparc64/machdep.c Sun Dec 8 14:21:54 2013 (r259101) > +++ head/sys/sparc64/sparc64/machdep.c Sun Dec 8 15:25:19 2013 (r259102) > @@ -553,6 +553,13 @@ sparc64_init(caddr_t mdp, u_long o1, u_l > * trigger a fatal reset error or worse things further down the road. > * XXX it should be possible to use this solely instead of writing > * %tba in cpu_setregs(). Doing so causes a hang however. > + * > + * NB: the low-level console drivers require a working DELAY() and > + * some compiler optimizations may cause the curthread accesses of > + * mutex(9) to be factored out even if the latter aren't actually > + * called. Both of these require PCPU_REG to be set. However, we > + * can't set PCPU_REG without also taking over the trap table or the > + * firmware will overwrite it. > */ > sun4u_set_traptable(tl0_base); > Oh, I'm sorry. It was old fix. Seems it here since 2009. Thanks. WBW -- Aleksandr Rybalko <ray@ddteam.net>
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