From patchwork Tue Jan 26 16:16:19 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alessandro Rubini X-Patchwork-Id: 71716 Return-Path: X-Original-To: wd@gemini.denx.de Delivered-To: wd@gemini.denx.de Received: from diddl.denx.de (diddl.denx.de [10.0.0.6]) by gemini.denx.de (Postfix) with ESMTP id AB4233F6C0 for ; Tue, 26 Jan 2010 17:18:07 +0100 (CET) Received: from diddl.denx.de (localhost.localdomain [127.0.0.1]) by diddl.denx.de (Postfix) with ESMTP id 99223C96024F for ; Tue, 26 Jan 2010 17:18:07 +0100 (CET) Received: from pop.mnet-online.de by diddl.denx.de with POP3 (fetchmail-6.3.9) for (single-drop); Tue, 26 Jan 2010 17:18:07 +0100 (CET) Received: from murder (svr19.m-online.net [192.168.3.147]) by backend2 (Cyrus v2.2.12) with LMTPA; Tue, 26 Jan 2010 17:16:57 +0100 X-Sieve: CMU Sieve 2.2 Received: from mail.m-online.net (localhost [127.0.0.1]) by frontend3.pop.m-online.net (Cyrus v2.2.13) with LMTPA; Tue, 26 Jan 2010 17:16:56 +0100 Received: from scanner-4.m-online.net (scanner-4.m-online.net [192.168.1.18]) by mail.m-online.net (Postfix) with ESMTP id E6F3C200102; Tue, 26 Jan 2010 17:16:56 +0100 (CET) Received: from mxin-2.m-online.net ([192.168.1.21]) by scanner-4.m-online.net (scanner-4.m-online.net [192.168.1.18]) (amavisd-new, port 10026) with ESMTP id 14278-03; Tue, 26 Jan 2010 17:16:55 +0100 (CET) Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by mxin-2.m-online.net (Postfix) with ESMTP id 3876146C0BF; Tue, 26 Jan 2010 17:16:55 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 99AEF2808F; Tue, 26 Jan 2010 17:16:48 +0100 (CET) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9DdzhezW9BcJ; Tue, 26 Jan 2010 17:16:48 +0100 (CET) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id EA3782809C; Tue, 26 Jan 2010 17:16:31 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 503CC28082 for ; Tue, 26 Jan 2010 17:16:28 +0100 (CET) Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ybsxo9IhEn-J for ; Tue, 26 Jan 2010 17:16:28 +0100 (CET) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail.gnudd.com (mail2.gnudd.com [213.203.150.91]) by theia.denx.de (Postfix) with ESMTPS id 474B128083 for ; Tue, 26 Jan 2010 17:16:20 +0100 (CET) Received: from mail.gnudd.com (localhost [127.0.0.1]) by mail.gnudd.com (8.14.3/8.14.3/Debian-5) with ESMTP id o0QGGJDP020978 for ; Tue, 26 Jan 2010 17:16:19 +0100 Received: (from rubini@localhost) by mail.gnudd.com (8.14.3/8.14.3/Submit) id o0QGGJ9M020977 for u-boot@lists.denx.de; Tue, 26 Jan 2010 17:16:19 +0100 Date: Tue, 26 Jan 2010 17:16:19 +0100 From: Alessandro Rubini To: u-boot@lists.denx.de Message-ID: <20100126161619.GA20972@morgana.gnudd.com> MIME-Version: 1.0 Content-Disposition: inline X-Face: #Q; A)@_4.#>0+_%y]7aBr:c"ndLp&#+2?]J; lkse\^)FP^Lr5@O0{)J; 'nny4%74.fM'n)M >ISCj.KmsL/HTxz!:Ju'pnj'Gz&. Organization: GnuDD, Device Drivers, Embedded Systems, Courses Subject: [U-Boot] [PATCH RFC 1/2] flush cache for arm926 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.9 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de X-Virus-Scanned: by amavisd-new at m-online.net This simple adds the cache flush for arm926. Most likely the same works for other families, like arm920t, but I didn't check as this is currently just an RFC. Signed-off-by: Alessandro Rubini --- lib_arm/cache.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/lib_arm/cache.c b/lib_arm/cache.c index 61ee9d3..b36fd24 100644 --- a/lib_arm/cache.c +++ b/lib_arm/cache.c @@ -32,5 +32,11 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2) arm1136_cache_flush(); #endif +#ifdef CONFIG_ARM926EJS + /* test and clean, page 2-23 of arm926ejs manual */ + asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); + /* disable write buffer as well (page 2-22) */ + asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +#endif return; }