0384fff8c5
include: * Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The alpha port is still in transition and currently uses both.) * Per-CPU idle processes. * Interrupts are run in their own separate kernel threads and can be preempted (i386 only). Partially contributed by: BSDi (BSD/OS) Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/*
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* Copyright (c) 1994, Henrik Vestergaard Draboel
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by (name).
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_RTPRIO_H_
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#define _SYS_RTPRIO_H_
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/*
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* Process realtime-priority specifications to rtprio.
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*/
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/* priority types. Start at 1 to catch uninitialized fields. */
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#define RTP_PRIO_ITHREAD 1 /* interrupt thread */
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#define RTP_PRIO_REALTIME 2 /* real time process */
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#define RTP_PRIO_NORMAL 3 /* time sharing process */
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#define RTP_PRIO_IDLE 4 /* idle process */
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/* RTP_PRIO_FIFO is POSIX.1B SCHED_FIFO.
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*/
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#define RTP_PRIO_FIFO_BIT 4
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#define RTP_PRIO_FIFO (RTP_PRIO_REALTIME | RTP_PRIO_FIFO_BIT)
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#define RTP_PRIO_BASE(P) ((P) & ~RTP_PRIO_FIFO_BIT)
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#define RTP_PRIO_IS_REALTIME(P) (RTP_PRIO_BASE(P) == RTP_PRIO_REALTIME)
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#define RTP_PRIO_NEED_RR(P) ((P) != RTP_PRIO_FIFO)
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/* priority range */
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#define RTP_PRIO_MIN 0 /* Highest priority */
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#define RTP_PRIO_MAX 31 /* Lowest priority */
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/*
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* rtprio() syscall functions
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*/
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#define RTP_LOOKUP 0
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#define RTP_SET 1
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#ifndef LOCORE
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/*
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* Scheduling class information. This is strictly speaking not only
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* for real-time processes. We should replace it with two variables:
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* class and priority. At the moment we use prio here for real-time
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* and interrupt processes, and for others we use proc.p_pri. FIXME.
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*/
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struct rtprio {
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u_short type; /* scheduling class */
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u_short prio;
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};
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#endif
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/*
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* Interrupt thread priorities, after BSD/OS.
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*/
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#define PI_REALTIME 1 /* very high priority (clock) */
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#define PI_AV 2 /* Audio/video devices */
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#define PI_TTYHIGH 3 /* High priority tty's (small FIFOs) */
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#define PI_TAPE 4 /* Tape devices (high for streaming) */
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#define PI_NET 5 /* Network interfaces */
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#define PI_DISK 6 /* Disks and SCSI */
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#define PI_TTYLOW 7 /* Ttys with big buffers */
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#define PI_DISKLOW 8 /* Disks that do programmed I/O */
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#define PI_DULL 9 /* We don't know or care */
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/* Soft interrupt threads */
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#define PI_SOFT 15 /* All soft interrupts */
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int rtprio __P((int, pid_t, struct rtprio *));
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_RTPRIO_H_ */
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