From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9893 invoked by alias); 23 Apr 2012 19:38:49 -0000 Received: (qmail 9821 invoked by uid 22791); 23 Apr 2012 19:38:48 -0000 X-SWARE-Spam-Status: No, hits=-2.7 required=5.0 tests=AWL,BAYES_00,KHOP_THREADED,T_RP_MATCHES_RCVD 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; Mon, 23 Apr 2012 19:38:35 +0000 Received: by mail.ecoscentric.com (Postfix, from userid 48) id 5434D2F78006; Mon, 23 Apr 2012 20:38:34 +0100 (BST) From: bugzilla-daemon@bugs.ecos.sourceware.org To: unassigned@bugs.ecos.sourceware.org Subject: [Bug 1001572] Separate FIQ and IRQ management X-Bugzilla-Reason: AssignedTo 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: jifl@ecoscentric.com X-Bugzilla-Status: NEW X-Bugzilla-Priority: low X-Bugzilla-Assigned-To: unassigned@bugs.ecos.sourceware.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: CC Blocks 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: Mon, 23 Apr 2012 19:38:00 -0000 Message-Id: <20120423193828.BA5412F78006@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/msg00809.txt.bz2 Please do not reply to this email. Use the web interface provided at: http://bugs.ecos.sourceware.org/show_bug.cgi?id=1001572 Jonathan Larmour changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jifl@ecoscentric.com Blocks| |1001160 --- Comment #2 from Jonathan Larmour 2012-04-23 20:38:25 BST --- I notice that FUNC_START_ARM does not put the new functions in a different section, so they won't be GC'd, so will be in all programs, whether used or not. It looks like I was going to do something about this in the eCosCentric sources, but then it seems I commented it out (changeset 371380826e8c). Hmm, can't remember why now. Thanks for incorporating the fix from bug 1001160. But that bug also mentions a third possibility, that it might be useful for some users to do their own FIQ handling (and not use the FIQ->IRQ kludge), but for FIQs to still be disabled when handling IRQs. This can have benefits for some people. In particular, you would no longer need a separate FIQ interrupt stack, but could share one with IRQ again, which could be an important memory saver. I think all it would need is one more CDL option controlling the CPSR_INTR_MASK define, which CYGOPT_HAL_ARM_FIQ_DISABLE can use 'requires' on to set. And also then that lets us avoid defining __fiq_stack in that case. Thoughts? Jifl -- Configure bugmail: http://bugs.ecos.sourceware.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug.