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freebsd-dev/sys/alpha/include/lock.h

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Import NetBSD/Alpha headers needed to get the FreeBSD userland to compile (and even run). These files don't necessarily make sense for a FreeBSD/Alpha kernel build. That will come later and these files will be changed accordingly.
1998-03-09 05:43:16 +00:00
/*
* Copyright (c) 1997, by Steve Passe
* 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. The name of the developer 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.
*
$Id$ -> $FreeBSD$
1999-08-28 01:08:13 +00:00
* $FreeBSD$
Import NetBSD/Alpha headers needed to get the FreeBSD userland to compile (and even run). These files don't necessarily make sense for a FreeBSD/Alpha kernel build. That will come later and these files will be changed accordingly.
1998-03-09 05:43:16 +00:00
*/
#ifndef _MACHINE_LOCK_H_
#define _MACHINE_LOCK_H_
/*
* Simple spin lock.
* It is an error to hold one of these locks while a process is sleeping.
*/
struct simplelock {
Major update to the way synchronization is done in the kernel. Highlights 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
2000-09-07 01:33:02 +00:00
volatile u_int lock_data;
Import NetBSD/Alpha headers needed to get the FreeBSD userland to compile (and even run). These files don't necessarily make sense for a FreeBSD/Alpha kernel build. That will come later and these files will be changed accordingly.
1998-03-09 05:43:16 +00:00
};
Major update to the way synchronization is done in the kernel. Highlights 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
2000-09-07 01:33:02 +00:00
/* functions in mp_machdep.c */
void s_lock_init __P((struct simplelock *));
void s_lock __P((struct simplelock *));
int s_lock_try __P((struct simplelock *));
void ss_lock __P((struct simplelock *));
void ss_unlock __P((struct simplelock *));
void s_lock_np __P((struct simplelock *));
void s_unlock_np __P((struct simplelock *));
/* inline simplelock functions */
static __inline void
s_unlock(struct simplelock *lkp)
{
alpha_mb();
lkp->lock_data = 0;
}
Move MAXCPU from machine/smp.h to machine/param.h to fix breakage with !SMP kernels. Also, replace NCPUS with MAXCPU since they are redundant.
2000-09-23 12:18:06 +00:00
#if !defined(SIMPLELOCK_DEBUG) && MAXCPU > 1
Major update to the way synchronization is done in the kernel. Highlights 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
2000-09-07 01:33:02 +00:00
/*
* This set of defines turns on the real functions in i386/isa/apic_ipl.s.
*/
#define simple_lock_init(alp) s_lock_init(alp)
#define simple_lock(alp) s_lock(alp)
#define simple_lock_try(alp) s_lock_try(alp)
#define simple_unlock(alp) s_unlock(alp)
Move MAXCPU from machine/smp.h to machine/param.h to fix breakage with !SMP kernels. Also, replace NCPUS with MAXCPU since they are redundant.
2000-09-23 12:18:06 +00:00
#endif /* !SIMPLELOCK_DEBUG && MAXCPU > 1 */
Major update to the way synchronization is done in the kernel. Highlights 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
2000-09-07 01:33:02 +00:00
Add sio support.
1998-07-22 08:28:24 +00:00
#define COM_LOCK()
#define COM_UNLOCK()
Major update to the way synchronization is done in the kernel. Highlights 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
2000-09-07 01:33:02 +00:00
#define COM_DISABLE_INTR() COM_LOCK()
#define COM_ENABLE_INTR() COM_UNLOCK()
Add sio support.
1998-07-22 08:28:24 +00:00
Import NetBSD/Alpha headers needed to get the FreeBSD userland to compile (and even run). These files don't necessarily make sense for a FreeBSD/Alpha kernel build. That will come later and these files will be changed accordingly.
1998-03-09 05:43:16 +00:00
#endif /* !_MACHINE_LOCK_H_ */
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