From owner-svn-src-all@FreeBSD.ORG Sun Dec 8 15:25:19 2013 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B32E5CE1; Sun, 8 Dec 2013 15:25:19 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 9F5BD1A4C; Sun, 8 Dec 2013 15:25:19 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id rB8FPJso023253; Sun, 8 Dec 2013 15:25:19 GMT (envelope-from marius@svn.freebsd.org) Received: (from marius@localhost) by svn.freebsd.org (8.14.7/8.14.7/Submit) id rB8FPJK0023252; Sun, 8 Dec 2013 15:25:19 GMT (envelope-from marius@svn.freebsd.org) Message-Id: <201312081525.rB8FPJK0023252@svn.freebsd.org> From: Marius Strobl Date: Sun, 8 Dec 2013 15:25:19 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r259102 - head/sys/sparc64/sparc64 X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.17 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Dec 2013 15:25:19 -0000 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);