{"id":808262,"url":"http://patchwork.ozlabs.org/api/patches/808262/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-arc/patch/20170831142158.27245-1-abrodkin@synopsys.com/","project":{"id":48,"url":"http://patchwork.ozlabs.org/api/projects/48/?format=json","name":"Linux ARC development","link_name":"linux-arc","list_id":"linux-snps-arc.lists.infradead.org","list_email":"linux-snps-arc@lists.infradead.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170831142158.27245-1-abrodkin@synopsys.com>","list_archive_url":null,"date":"2017-08-31T14:21:58","name":"arc: Flush and invalidate caches on start","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"7806dbe5b57c2ea15149dff0ac8ff7703a79f545","submitter":{"id":23881,"url":"http://patchwork.ozlabs.org/api/people/23881/?format=json","name":"Alexey Brodkin","email":"Alexey.Brodkin@synopsys.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-arc/patch/20170831142158.27245-1-abrodkin@synopsys.com/mbox/","series":[{"id":840,"url":"http://patchwork.ozlabs.org/api/series/840/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-arc/list/?series=840","date":"2017-08-31T14:21:58","name":"arc: Flush and invalidate caches on start","version":1,"mbox":"http://patchwork.ozlabs.org/series/840/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/808262/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/808262/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org; spf=none (mailfrom)\n\tsmtp.mailfrom=lists.infradead.org (client-ip=65.50.211.133;\n\thelo=bombadil.infradead.org;\n\tenvelope-from=linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=lists.infradead.org\n\theader.i=@lists.infradead.org header.b=\"MZjUbE8h\"; \n\tdkim-atps=neutral"],"Received":["from bombadil.infradead.org (bombadil.infradead.org\n\t[65.50.211.133])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xjl2C2MSyz9s83\n\tfor ;\n\tFri, 1 Sep 2017 00:22:27 +1000 (AEST)","from localhost ([127.0.0.1] helo=bombadil.infradead.org)\n\tby bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux))\n\tid 1dnQMT-0005mX-Uo; Thu, 31 Aug 2017 14:22:25 +0000","from us01smtprelay-2.synopsys.com ([198.182.47.9]\n\thelo=smtprelay.synopsys.com)\n\tby bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux))\n\tid 1dnQMQ-0005kA-Ij for linux-snps-arc@lists.infradead.org;\n\tThu, 31 Aug 2017 14:22:25 +0000","from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239])\n\tby smtprelay.synopsys.com (Postfix) with ESMTP id C3FA724E1531;\n\tThu, 31 Aug 2017 07:22:01 -0700 (PDT)","from mailhost.synopsys.com (localhost [127.0.0.1])\n\tby mailhost.synopsys.com (Postfix) with ESMTP id A107E35E;\n\tThu, 31 Aug 2017 07:22:01 -0700 (PDT)","from ru20arcgnu1.internal.synopsys.com\n\t(ru20arcgnu1.internal.synopsys.com [10.121.9.48])\n\tby mailhost.synopsys.com (Postfix) with ESMTP id 55A18337;\n\tThu, 31 Aug 2017 07:22:00 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n\td=lists.infradead.org; s=bombadil.20170209; h=Sender:\n\tContent-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe:\n\tList-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:\n\tSubject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date:\n\tResent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:\n\tReferences:List-Owner; bh=ojSmtG9SI/jo9IjFu42hBbvtlj0dJEItkmcBFNaw06w=;\n\tb=MZj\n\tUbE8hiQN+oMy376tIgOjj9ipCys7laVdJ45qTyNmdMGp/PHDInowOeWkl/SIIGsTPjR7LUyoF+tT0\n\tadpbAMksk/cFGGm9WYOSQq7cv/gXYHJ9VQm4dQzUX6h2LtT8Yi0vfHR6V9UElnnFL305WnQJqmrCJ\n\tvAQd3+LH9N6N/JehBUHvUt4uoje1dz48hSfs3fEe7/EFKyA4O+yqIxi/dv+uFB+KgriTRQwQobnS6\n\t3cW9f+uFfgNcNDFwgB1wGGW8mJc0eyNlDcJVZPzZ89HJ16Qydf7bDoQeOvwAwoNFx7Ry4+1r+NIt6\n\t+9B4lkdBfghAQmvENetjcdzJi46Ff0Q==;","From":"Alexey Brodkin ","To":"linux-snps-arc@lists.infradead.org","Subject":"[PATCH] arc: Flush and invalidate caches on start","Date":"Thu, 31 Aug 2017 17:21:58 +0300","Message-Id":"<20170831142158.27245-1-abrodkin@synopsys.com>","X-Mailer":"git-send-email 2.11.0","X-CRM114-Version":"20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 ","X-CRM114-CacheID":"sfid-20170831_072223_501255_450C1E02 ","X-CRM114-Status":"UNSURE ( 5.44 )","X-CRM114-Notice":"Please train this message.","X-Spam-Score":"-1.9 (-)","X-Spam-Report":"SpamAssassin version 3.4.1 on bombadil.infradead.org summary:\n\tContent analysis details: (-1.9 points)\n\tpts rule name description\n\t---- ----------------------\n\t--------------------------------------------------\n\t-0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/,\n\tno trust [198.182.47.9 listed in list.dnswl.org]\n\t-0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay\n\tdomain\n\t-1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1%\n\t[score: 0.0000]","X-BeenThere":"linux-snps-arc@lists.infradead.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"Linux on Synopsys ARC Processors\n\t","List-Unsubscribe":", \n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":", \n\t","Cc":"Vineet Gupta ,\n\tAlexey Brodkin ,\n\tlinux-kernel@vger.kernel.org","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"\"linux-snps-arc\" ","Errors-To":"linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org"},"content":"This is useful to make sure no stale data exists in caches after bootloaders.\nThe worst thing could be some lines of cache were locked in a bootloader\nfor example during DDR recalibration and never unlocked. This may lead\nto really unpredictable issues later down the line.\n\nSigned-off-by: Alexey Brodkin \n---\n arch/arc/kernel/head.S | 16 ++++++++++++++++\n 1 file changed, 16 insertions(+)","diff":"diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S\nindex 8b90d25a15cc..04e28b664183 100644\n--- a/arch/arc/kernel/head.S\n+++ b/arch/arc/kernel/head.S\n@@ -34,6 +34,10 @@\n #endif\n \tsr\tr5, [ARC_REG_IC_CTRL]\n \n+\t; Invalidate entire I$\n+\tmov\tr5, 1\n+\tsr\tr5, [ARC_REG_IC_IVIC]\n+\n 1:\n \tlr\tr5, [ARC_REG_DC_BCR]\n \tbreq r5, 0, 1f\t\t; D$ doesn't exist\n@@ -46,6 +50,18 @@\n #endif\n \tsr\tr5, [ARC_REG_DC_CTRL]\n \n+\t; Flush entire D$\n+\tmov\tr5, 1\n+\tsr\tr5, [ARC_REG_DC_FLSH]\n+\t; Wait for flush operation to complete\n+1:\n+\tlr\tr5, [ARC_REG_DC_CTRL]\n+\tbbit1\tr5, DC_CTRL_FLUSH_STATUS, 1b\n+\n+\t; Invalidate entire D$\n+\tmov\tr5, 1\n+\tsr\tr5, [ARC_REG_DC_IVDC]\n+\n 1:\n .endm\n \n","prefixes":[]}