Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752546AbWAFU1o (ORCPT ); Fri, 6 Jan 2006 15:27:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752544AbWAFU1N (ORCPT ); Fri, 6 Jan 2006 15:27:13 -0500 Received: from mx.pathscale.com ([64.160.42.68]:58247 "EHLO mx.pathscale.com") by vger.kernel.org with ESMTP id S1752546AbWAFU1F (ORCPT ); Fri, 6 Jan 2006 15:27:05 -0500 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [PATCH 1 of 3] Introduce __raw_memcpy_toio32 X-Mercurial-Node: d286502c3b3cd6bcec7be66742dca731ae842205 Message-Id: In-Reply-To: Date: Fri, 6 Jan 2006 12:26:34 -0800 From: "Bryan O'Sullivan" To: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2219 Lines: 57 This arch-independent routine copies data to a memory-mapped I/O region, using 32-bit accesses. It does not guarantee access ordering, nor does it perform a memory barrier afterwards. This style of access is required by some devices. Signed-off-by: Bryan O'Sullivan diff -r ddf8ff83e4ac -r d286502c3b3c include/asm-generic/raw_memcpy_toio32.h --- /dev/null Thu Jan 1 00:00:00 1970 +0000 +++ b/include/asm-generic/raw_memcpy_toio32.h Fri Jan 6 12:25:00 2006 -0800 @@ -0,0 +1,41 @@ +/* + * Copyright 2006 PathScale, Inc. All Rights Reserved. + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#ifndef _ASM_GENERIC_RAW_MEMCPYTOIO32_H +#define _ASM_GENERIC_RAW_MEMCPYTOIO32_H + +/* + * __raw_memcpy_toio32 - copy data to MMIO space, in 32-bit units + * + * Order of access is not guaranteed, nor is a memory barrier performed + * afterwards. This is an arch-independent generic implementation. + * + * @to: destination, in MMIO space (must be 32-bit aligned) + * @from: source (must be 32-bit aligned) + * @count: number of 32-bit quantities to copy + */ +static inline void __raw_memcpy_toio32(void __iomem *to, const void *from, + size_t count) +{ + u32 __iomem *dst = d; + const u32 *src = s; + size_t i; + + for (i = 0; i < count; i++) + __raw_writel(*src++, dst++); +} + +#endif // _ASM_GENERIC_RAW_MEMCPYTOIO32_H - 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/