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/*
* Copyright (c) 1994, Henrik Vestergaard Draboel
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by (name).
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 _SYS_RTPRIO_H_
#define _SYS_RTPRIO_H_
/*
* Process realtime-priority specifications to rtprio.
*/
/* priority types. Start at 1 to catch uninitialized fields. */
#define RTP_PRIO_ITHREAD 1 /* interrupt thread */
#define RTP_PRIO_REALTIME 2 /* real time process */
#define RTP_PRIO_NORMAL 3 /* time sharing process */
#define RTP_PRIO_IDLE 4 /* idle process */
/* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
*/
#define RTP_PRIO_FIFO_BIT 4
#define RTP_PRIO_FIFO (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
#define RTP_PRIO_BASE(P) ((P) & ~RTP_PRIO_FIFO_BIT)
#define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
#define RTP_PRIO_NEED_RR(P) ((P) != RTP_PRIO_FIFO)
/* priority range */
#define RTP_PRIO_MIN 0 /* Highest priority */
#define RTP_PRIO_MAX 31 /* Lowest priority */
/*
* rtprio() syscall functions
*/
#define RTP_LOOKUP 0
#define RTP_SET 1
#ifndef LOCORE
/*
* Scheduling class information. This is strictly speaking not only
* for real-time processes. We should replace it with two variables:
* class and priority. At the moment we use prio here for real-time
* and interrupt processes, and for others we use proc.p_pri. FIXME.
*/
struct rtprio {
u_short type; /* scheduling class */
u_short prio;
};
#endif
/*
* Interrupt thread priorities, after BSD/OS.
*/
#define PI_REALTIME 1 /* very high priority (clock) */
#define PI_AV 2 /* Audio/video devices */
#define PI_TTYHIGH 3 /* High priority tty's (small FIFOs) */
#define PI_TAPE 4 /* Tape devices (high for streaming) */
#define PI_NET 5 /* Network interfaces */
#define PI_DISK 6 /* Disks and SCSI */
#define PI_TTYLOW 7 /* Ttys with big buffers */
#define PI_DISKLOW 8 /* Disks that do programmed I/O */
#define PI_DULL 9 /* We don't know or care */
/* Soft interrupt threads */
#define PI_SOFT 15 /* All soft interrupts */
#ifndef _KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
int rtprio __P((int, pid_t, struct rtprio *));
__END_DECLS
#endif /* !_KERNEL */
#endif /* !_SYS_RTPRIO_H_ */
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