freebsd-skq/sys/dev/io/iodev.h
attilio 6dfd3f3030 - Extract the IODEV_PIO interface from ia64 and make it MI.
In the end, it does help fixing /dev/io usage from multithreaded
  processes.
- On i386 and amd64 the old behaviour is kept but multithreaded
  processes must use the new interface in order to work well.
- Support for the other architectures is greatly improved, where
  necessary, by the necessity to define very small things now.

Manpage update will happen shortly.

Sponsored by:	Sandvine Incorporated
PR:		threads/116181
Reviewed by:	emaste, marcel
MFC after:	3 weeks
2010-04-28 15:38:01 +00:00

45 lines
1.6 KiB
C

/*-
* Copyright (c) 2010 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _DEV_IODEV_H_
#define _DEV_IODEV_H_
#define IODEV_PIO_READ 0
#define IODEV_PIO_WRITE 1
struct iodev_pio_req {
u_int access;
u_int port;
u_int width;
u_int val;
};
#define IODEV_PIO _IOWR('I', 0, struct iodev_pio_req)
#endif /* _DEV_IODEV_H_ */