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freebsd-dev/sys/i386/include/iodev.h

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Break out the MI part of the /dev/[k]mem and /dev/io drivers into their own directory and module, leaving the MD parts in the MD area (the MD parts _are_ part of the modules). /dev/mem and /dev/io are now loadable modules, thus taking us one step further towards a kernel created entirely out of modules. Of course, there is nothing preventing the kernel from having these statically compiled.
2004-08-01 11:40:54 +00:00
/*-
* Copyright (c) 2004 Mark R V Murray
* 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
* in this position and unchanged.
* 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 AUTHORS ``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 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.
*
* $FreeBSD$
*/
- 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
#ifndef _MACHINE_IODEV_H_
#define _MACHINE_IODEV_H_
Break out the MI part of the /dev/[k]mem and /dev/io drivers into their own directory and module, leaving the MD parts in the MD area (the MD parts _are_ part of the modules). /dev/mem and /dev/io are now loadable modules, thus taking us one step further towards a kernel created entirely out of modules. Of course, there is nothing preventing the kernel from having these statically compiled.
2004-08-01 11:40:54 +00:00
- 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
#ifdef _KERNEL
#include <machine/cpufunc.h>
#define iodev_read_1 inb
#define iodev_read_2 inw
#define iodev_read_4 inl
#define iodev_write_1 outb
#define iodev_write_2 outw
#define iodev_write_4 outl
int iodev_open(struct thread *td);
int iodev_close(struct thread *td);
int iodev_ioctl(u_long cmd, caddr_t data);
#endif /* _KERNEL */
#endif /* _MACHINE_IODEV_H_ */
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