From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 23902 invoked by alias); 13 Oct 2012 09:28:01 -0000 Received: (qmail 23893 invoked by uid 22791); 13 Oct 2012 09:28:01 -0000 X-SWARE-Spam-Status: No, hits=0.2 required=5.0 tests=AWL,BAYES_20,KHOP_RCVD_UNTRUST,KHOP_THREADED,RCVD_IN_DNSWL_LOW,RISK_FREE X-Spam-Check-By: sourceware.org Received: from hagrid.ecoscentric.com (HELO mail.ecoscentric.com) (212.13.207.197) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 13 Oct 2012 09:27:57 +0000 Received: from localhost (hagrid.ecoscentric.com [127.0.0.1]) by mail.ecoscentric.com (Postfix) with ESMTP id 3F5C22F7800C for ; Sat, 13 Oct 2012 10:27:56 +0100 (BST) Received: from mail.ecoscentric.com ([127.0.0.1]) by localhost (hagrid.ecoscentric.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nk5nRCL9d5Cl; Sat, 13 Oct 2012 10:27:51 +0100 (BST) From: bugzilla-daemon@bugs.ecos.sourceware.org To: ecos-bugs@ecos.sourceware.org Subject: [Bug 1001606] Enable the cache on Kinetis in RAM startup mode X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: eCos X-Bugzilla-Component: HAL X-Bugzilla-Keywords: X-Bugzilla-Severity: enhancement X-Bugzilla-Who: ilijak@siva.com.mk X-Bugzilla-Status: NEEDINFO X-Bugzilla-Priority: low X-Bugzilla-Assigned-To: jifl@ecoscentric.com X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: In-Reply-To: References: X-Bugzilla-URL: http://bugs.ecos.sourceware.org/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Sat, 13 Oct 2012 09:28:00 -0000 Message-Id: <20121013092751.9E2F02F78005@mail.ecoscentric.com> Mailing-List: contact ecos-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: ecos-bugs-owner@sourceware.org X-SW-Source: 2012/txt/msg01296.txt.bz2 Please do not reply to this email. Use the web interface provided at: http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001606 --- Comment #25 from Ilija Kocho 2012-10-13 10:27:40 BST --- (In reply (addendum) to comment #23) > Bus arbitration tweak for copy-back DDRAM 121008 > Another consideration: It is possible to swap PC and PS priorities permanently for RAM startup. Then cache control macros will be shorter and there's no risk of preemption.. The drawback, if any, is that crossbar arbitration priorities for DDRAM will be different than the reset default. If implemented, this inversion could be fixed or configurable with CDL. Comments? > This is an alternative to round-robin. > With a little tweak of bus arbitration priority, prior to spin-check of cache > status the priorities of PC and PS master of DDRAM slave are swapped (only in > case PC priority is bigger than PS priority) so code execution now can't stale > the DCACHE flushing (or any other operation). After the operation, the > priorities are restored, so practically all the time, the system works with > default settings (or whatever may have been set by application). > > Note: This patch is incremental to attachment 1949 [details]. > > Jifl, > I hope that now Kinetis CACHE has achieved desired functionality. > > Ilija -- Configure bugmail: http://bugs.ecos.sourceware.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.