Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752501AbZIWLsO (ORCPT ); Wed, 23 Sep 2009 07:48:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752077AbZIWLsN (ORCPT ); Wed, 23 Sep 2009 07:48:13 -0400 Received: from mail-yx0-f199.google.com ([209.85.210.199]:59143 "EHLO mail-yx0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751812AbZIWLsM convert rfc822-to-8bit (ORCPT ); Wed, 23 Sep 2009 07:48:12 -0400 MIME-Version: 1.0 In-Reply-To: <00ae0c0830ca659709d80e56e8e87b636c32fcf6.1253616961.git.kirill@shutemov.name> References: <00ae0c0830ca659709d80e56e8e87b636c32fcf6.1253616961.git.kirill@shutemov.name> Date: Wed, 23 Sep 2009 14:48:16 +0300 Message-ID: Subject: Re: [PATCH v4, REBASED 1/2] ARM: Pass IFSR register to do_PrefetchAbort() From: "Kirill A. Shutemov" To: linux-arm-kernel@lists.infradead.org, Russell King Cc: linux-kernel@vger.kernel.org, Bityutskiy Artem , Koskinen Aaro , "Kirill A. Shutemov" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 896 Lines: 22 On Tue, Sep 22, 2009 at 2:00 PM, Kirill A. Shutemov wrote: > Instruction fault status register, IFSR, was introduced on ARMv6 to > provide status information about the last insturction fault. It > needed for proper prefetch abort handling. > > Now we have three prefetch abort model: > >  * legacy - for CPUs before ARMv6. They doesn't provide neither >    IFSR nor IFAR. We simulate IFSR with section translation fault >    status for them to generalize code; >  * ARMv6 - provides IFSR, but not IFAR; >  * ARMv7 - provides both IFSR and IFAR. > > Signed-off-by: Kirill A. Shutemov Any feedback? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/