diff options
author | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-07 09:52:04 -0600 |
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committer | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-07 09:52:04 -0600 |
commit | a9153ec3040f54fa52b68e14dafed2aba7b780ae (patch) | |
tree | fda80e3380dfebf7d97868507aa185757852e882 /rtems/freebsd/sys/priority.h | |
download | rtems-libbsd-a9153ec3040f54fa52b68e14dafed2aba7b780ae.tar.bz2 |
Initial import
Code is based on FreeBSD 8.2 with USB support from Sebastian Huber
and Thomas Doerfler. Initial TCP/IP stack work is from Kevel Kirspel.
Diffstat (limited to 'rtems/freebsd/sys/priority.h')
-rw-r--r-- | rtems/freebsd/sys/priority.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/rtems/freebsd/sys/priority.h b/rtems/freebsd/sys/priority.h new file mode 100644 index 00000000..dbaa5eaa --- /dev/null +++ b/rtems/freebsd/sys/priority.h @@ -0,0 +1,130 @@ +/*- + * 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 Henrik Vestergaard Draboel. + * 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_PRIORITY_HH_ +#define _SYS_PRIORITY_HH_ + +/* + * Process priority specifications. + */ + +/* + * Priority classes. + */ + +#define PRI_ITHD 1 /* Interrupt thread. */ +#define PRI_REALTIME 2 /* Real time process. */ +#define PRI_TIMESHARE 3 /* Time sharing process. */ +#define PRI_IDLE 4 /* Idle process. */ + +/* + * PRI_FIFO is POSIX.1B SCHED_FIFO. + */ + +#define PRI_FIFO_BIT 8 +#define PRI_FIFO (PRI_FIFO_BIT | PRI_REALTIME) + +#define PRI_BASE(P) ((P) & ~PRI_FIFO_BIT) +#define PRI_IS_REALTIME(P) (PRI_BASE(P) == PRI_REALTIME) +#define PRI_NEED_RR(P) ((P) != PRI_FIFO) + +/* + * Priorities. Note that with 64 run queues, differences less than 4 are + * insignificant. + */ + +/* + * Priorities range from 0 to 255, but differences of less then 4 (RQ_PPQ) + * are insignificant. Ranges are as follows: + * + * Interrupt threads: 0 - 63 + * Top half kernel threads: 64 - 127 + * Realtime user threads: 128 - 159 + * Time sharing user threads: 160 - 223 + * Idle user threads: 224 - 255 + * + * XXX If/When the specific interrupt thread and top half thread ranges + * disappear, a larger range can be used for user processes. + */ + +#define PRI_MIN (0) /* Highest priority. */ +#define PRI_MAX (255) /* Lowest priority. */ + +#define PRI_MIN_ITHD (PRI_MIN) +#define PRI_MAX_ITHD (PRI_MIN_KERN - 1) + +#define PI_REALTIME (PRI_MIN_ITHD + 0) +#define PI_AV (PRI_MIN_ITHD + 4) +#define PI_TTYHIGH (PRI_MIN_ITHD + 8) +#define PI_TAPE (PRI_MIN_ITHD + 12) +#define PI_NET (PRI_MIN_ITHD + 16) +#define PI_DISK (PRI_MIN_ITHD + 20) +#define PI_TTYLOW (PRI_MIN_ITHD + 24) +#define PI_DISKLOW (PRI_MIN_ITHD + 28) +#define PI_DULL (PRI_MIN_ITHD + 32) +#define PI_SOFT (PRI_MIN_ITHD + 36) + +#define PRI_MIN_KERN (64) +#define PRI_MAX_KERN (PRI_MIN_REALTIME - 1) + +#define PSWP (PRI_MIN_KERN + 0) +#define PVM (PRI_MIN_KERN + 4) +#define PINOD (PRI_MIN_KERN + 8) +#define PRIBIO (PRI_MIN_KERN + 12) +#define PVFS (PRI_MIN_KERN + 16) +#define PZERO (PRI_MIN_KERN + 20) +#define PSOCK (PRI_MIN_KERN + 24) +#define PWAIT (PRI_MIN_KERN + 28) +#define PCONFIG (PRI_MIN_KERN + 32) +#define PLOCK (PRI_MIN_KERN + 36) +#define PPAUSE (PRI_MIN_KERN + 40) + +#define PRI_MIN_REALTIME (128) +#define PRI_MAX_REALTIME (PRI_MIN_TIMESHARE - 1) + +#define PRI_MIN_TIMESHARE (160) +#define PRI_MAX_TIMESHARE (PRI_MIN_IDLE - 1) + +#define PUSER (PRI_MIN_TIMESHARE) + +#define PRI_MIN_IDLE (224) +#define PRI_MAX_IDLE (PRI_MAX) + +struct priority { + u_char pri_class; /* Scheduling class. */ + u_char pri_level; /* Normal priority level. */ + u_char pri_native; /* Priority before propogation. */ + u_char pri_user; /* User priority based on p_cpu and p_nice. */ +}; + +#endif /* !_SYS_PRIORITY_HH_ */ |