From c27a0d75b33c030965cc97d3d7f571107a673fb4 Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Wed, 1 Feb 2006 03:05:16 -0800 Subject: [PATCH] Introduce __iowrite32_copy This arch-independent routine copies data to a memory-mapped I/O region, using 32-bit accesses. The naming is double-underscored to make it clear that it does not guarantee write ordering, nor does it perform a memory barrier afterwards; the kernel doc also explicitly states this. This style of access is required by some devices. This change also introduces include/linux/io.h, at Andrew's suggestion. It only has one occupant at the moment, but is a logical destination for oft-replicated contents of include/asm-*/{io,iomap}.h to migrate to. Signed-off-by: Bryan O'Sullivan Cc: Andi Kleen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/io.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 include/linux/io.h (limited to 'include/linux') diff --git a/include/linux/io.h b/include/linux/io.h new file mode 100644 index 00000000000..85533ec5aaa --- /dev/null +++ b/include/linux/io.h @@ -0,0 +1,25 @@ +/* + * 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 _LINUX_IO_H +#define _LINUX_IO_H + +#include + +void __iowrite32_copy(void __iomem *to, const void *from, size_t count); + +#endif /* _LINUX_IO_H */ -- cgit v1.2.3-70-g09d2