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      1 /*	$NetBSD: kthread.h,v 1.14 2020/08/01 02:04:55 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 2007, 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      9  * NASA Ames Research Center, and by Andrew Doran.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     30  * POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _SYS_KTHREAD_H_
     34 #define	_SYS_KTHREAD_H_
     35 
     36 #if !defined(_KERNEL)
     37 #error "not supposed to be exposed to userland"
     38 #endif
     39 
     40 /*
     41  * Kernel thread handling.
     42  */
     43 
     44 #include <sys/proc.h>
     45 
     46 #define	KTHREAD_IDLE		0x01	/* Do not run on creation */
     47 #define	KTHREAD_MPSAFE		0x02	/* Do not acquire kernel_lock */
     48 #define	KTHREAD_INTR		0x04	/* Software interrupt handler */
     49 #define	KTHREAD_TS		0x08	/* Time-sharing priority range */
     50 #define	KTHREAD_MUSTJOIN	0x10	/* Must join on exit */
     51 
     52 void	kthread_sysinit(void);
     53 
     54 int	kthread_create(pri_t, int, struct cpu_info *,
     55     void (*)(void *), void *, lwp_t **, const char *, ...) __printflike(7, 8);
     56 void	kthread_exit(int) __dead;
     57 int	kthread_join(lwp_t *);
     58 
     59 int	kthread_fpu_enter(void);
     60 void	kthread_fpu_exit(int);
     61 
     62 /* Internal MD routines -- for use only by kthread_fpu_enter/exit.  */
     63 void	kthread_fpu_enter_md(void);
     64 void	kthread_fpu_exit_md(void);
     65 
     66 #endif /* _SYS_KTHREAD_H_ */
     67