1/*- 2 * Copyright (c) 2003 Matthew Dillon. 3 * Copyright (c) 2008 The DragonFly Project. 4 * All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 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. 13 * 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 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/i386/i386/simplelock.s,v 1.11.2.2 2003/02/04 20:55:28 jhb Exp $ 27 */ 28 29#include <machine/asmacros.h> /* miscellaneous macros */ 30#include <machine/lock.h> 31 32/* 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. 37 * 38 * NOTE: for UP the spinlock routines still disable/restore interrupts 39 */ 40ENTRY(spin_lock_deprecated) 41 movl 4(%esp),%edx 42 SPIN_LOCK((%edx)) /* note: %eax, %ecx tromped */ 43 ret 44 45ENTRY(spin_unlock_deprecated) 46 movl 4(%esp),%edx 47 SPIN_UNLOCK((%edx)) /* note: %eax, %ecx tromped */ 48 ret 49 50NON_GPROF_ENTRY(spin_lock_np) 51 movl 4(%esp),%edx 52 SPIN_LOCK((%edx)) /* note: %eax, %ecx tromped */ 53 NON_GPROF_RET 54 55NON_GPROF_ENTRY(spin_unlock_np) 56 movl 4(%esp), %edx /* get the address of the lock */ 57 SPIN_UNLOCK((%edx)) 58 NON_GPROF_RET 59 60/* 61 * Auxillary convenience routines. Note that these functions disable and 62 * restore interrupts as well, on SMP, as performing spin locking functions. 63 */ 64NON_GPROF_ENTRY(imen_lock) 65 SPIN_LOCK(imen_spinlock) 66 NON_GPROF_RET 67 68NON_GPROF_ENTRY(imen_unlock) 69 SPIN_UNLOCK(imen_spinlock) 70 NON_GPROF_RET 71 72NON_GPROF_ENTRY(intr_lock) 73 SPIN_LOCK(intr_spinlock) 74 NON_GPROF_RET 75 76NON_GPROF_ENTRY(intr_unlock) 77 SPIN_UNLOCK(intr_spinlock) 78 NON_GPROF_RET 79 80NON_GPROF_ENTRY(mpintr_lock) 81 SPIN_LOCK(mpintr_spinlock) 82 NON_GPROF_RET 83 84NON_GPROF_ENTRY(mpintr_unlock) 85 SPIN_UNLOCK(mpintr_spinlock) 86 NON_GPROF_RET 87 88NON_GPROF_ENTRY(clock_lock) 89 SPIN_LOCK(clock_spinlock) 90 NON_GPROF_RET 91 92NON_GPROF_ENTRY(clock_unlock) 93 SPIN_UNLOCK(clock_spinlock) 94 NON_GPROF_RET 95 96NON_GPROF_ENTRY(com_lock) 97 SPIN_LOCK(com_spinlock) 98 NON_GPROF_RET 99 100NON_GPROF_ENTRY(com_unlock) 101 SPIN_UNLOCK(com_spinlock) 102 NON_GPROF_RET 103 104NON_GPROF_ENTRY(cons_lock) 105 SPIN_LOCK(cons_spinlock) 106 NON_GPROF_RET 107 108NON_GPROF_ENTRY(cons_unlock) 109 SPIN_UNLOCK(cons_spinlock) 110 NON_GPROF_RET 111 112