diff options
author | Bryan O'Sullivan <bos@pathscale.com> | 2006-02-01 03:05:16 -0800 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-01 08:53:13 -0800 |
commit | c27a0d75b33c030965cc97d3d7f571107a673fb4 (patch) | |
tree | c4d797b413bb6f8a1b8507213294a291ab5114f8 /include | |
parent | f7589f28d7dd4586b4e90ac3b2a180409669053a (diff) | |
download | linux-c27a0d75b33c030965cc97d3d7f571107a673fb4.tar.bz2 |
[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 <bos@pathscale.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/io.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h new file mode 100644 index 000000000000..85533ec5aaa1 --- /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 <asm/io.h> + +void __iowrite32_copy(void __iomem *to, const void *from, size_t count); + +#endif /* _LINUX_IO_H */ |