2 * Copyright (c) 2003 Matthew Dillon.
3 * Copyright (c) 2008 The DragonFly Project.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. The name of the developer may NOT be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/i386/i386/simplelock.s,v 1.11.2.2 2003/02/04 20:55:28 jhb Exp $
29 #include <machine/asmacros.h> /* miscellaneous macros */
30 #include <machine/lock.h>
33 * The spinlock routines may only be used for low level debugging, like
34 * kernel printfs, and when no other option is available such as situations
35 * relating to hardware interrupt masks. Spinlock routines should not be
36 * used in interrupt service routines or in any other situation.
38 * NOTE: for UP the spinlock routines still disable/restore interrupts
40 ENTRY(spin_lock_deprecated)
42 SPIN_LOCK((%edx)) /* note: %eax, %ecx tromped */
45 ENTRY(spin_unlock_deprecated)
47 SPIN_UNLOCK((%edx)) /* note: %eax, %ecx tromped */
50 NON_GPROF_ENTRY(spin_lock_np)
52 SPIN_LOCK((%edx)) /* note: %eax, %ecx tromped */
55 NON_GPROF_ENTRY(spin_unlock_np)
56 movl 4(%esp), %edx /* get the address of the lock */
61 * Auxillary convenience routines. Note that these functions disable and
62 * restore interrupts as well, on SMP, as performing spin locking functions.
64 NON_GPROF_ENTRY(imen_lock)
65 SPIN_LOCK(imen_spinlock)
68 NON_GPROF_ENTRY(imen_unlock)
69 SPIN_UNLOCK(imen_spinlock)
72 NON_GPROF_ENTRY(intr_lock)
73 SPIN_LOCK(intr_spinlock)
76 NON_GPROF_ENTRY(intr_unlock)
77 SPIN_UNLOCK(intr_spinlock)
80 NON_GPROF_ENTRY(mpintr_lock)
81 SPIN_LOCK(mpintr_spinlock)
84 NON_GPROF_ENTRY(mpintr_unlock)
85 SPIN_UNLOCK(mpintr_spinlock)
88 NON_GPROF_ENTRY(clock_lock)
89 SPIN_LOCK(clock_spinlock)
92 NON_GPROF_ENTRY(clock_unlock)
93 SPIN_UNLOCK(clock_spinlock)
96 NON_GPROF_ENTRY(com_lock)
97 SPIN_LOCK(com_spinlock)
100 NON_GPROF_ENTRY(com_unlock)
101 SPIN_UNLOCK(com_spinlock)
104 NON_GPROF_ENTRY(cons_lock)
105 SPIN_LOCK(cons_spinlock)
108 NON_GPROF_ENTRY(cons_unlock)
109 SPIN_UNLOCK(cons_spinlock)