sys/platform/pc64/amd64/spinlock.s

   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  * $DragonFly: src/sys/platform/pc64/amd64/spinlock.s,v 1.1 2008/08/29 17:07:10 dillon Exp $
  28  */
  29
  30 #include <machine/asmacros.h>                   /* miscellaneous macros */
  31 #include <machine/lock.h>
  32
  33 /*
  34  * The spinlock routines may only be used for low level debugging, like
  35  * kernel printfs, and when no other option is available such as situations
  36  * relating to hardware interrupt masks.  Spinlock routines should not be
  37  * used in interrupt service routines or in any other situation.
  38  *
  39  * NOTE: for UP the spinlock routines still disable/restore interrupts
  40  */
  41 ENTRY(spin_lock_deprecated)
  42         movl    4(%esp),%edx
  43         SPIN_LOCK((%edx))               /* note: %eax, %ecx tromped */
  44         ret
  45
  46 ENTRY(spin_unlock_deprecated)
  47         movl    4(%esp),%edx
  48         SPIN_UNLOCK((%edx))             /* note: %eax, %ecx tromped */
  49         ret
  50
  51 NON_GPROF_ENTRY(spin_lock_np)
  52         movl    4(%esp),%edx
  53         SPIN_LOCK((%edx))               /* note: %eax, %ecx tromped */
  54         NON_GPROF_RET
  55
  56 NON_GPROF_ENTRY(spin_unlock_np)
  57         movl    4(%esp), %edx           /* get the address of the lock */
  58         SPIN_UNLOCK((%edx))
  59         NON_GPROF_RET
  60
  61 /*
  62  * Auxillary convenience routines.  Note that these functions disable and
  63  * restore interrupts as well, on SMP, as performing spin locking functions.
  64  */
  65 NON_GPROF_ENTRY(imen_lock)
  66         SPIN_LOCK(imen_spinlock)
  67         NON_GPROF_RET
  68
  69 NON_GPROF_ENTRY(imen_unlock)
  70         SPIN_UNLOCK(imen_spinlock)
  71         NON_GPROF_RET
  72
  73 NON_GPROF_ENTRY(intr_lock)
  74         SPIN_LOCK(intr_spinlock)
  75         NON_GPROF_RET
  76
  77 NON_GPROF_ENTRY(intr_unlock)
  78         SPIN_UNLOCK(intr_spinlock)
  79         NON_GPROF_RET
  80
  81 NON_GPROF_ENTRY(mpintr_lock)
  82         SPIN_LOCK(mpintr_spinlock)
  83         NON_GPROF_RET
  84
  85 NON_GPROF_ENTRY(mpintr_unlock)
  86         SPIN_UNLOCK(mpintr_spinlock)
  87         NON_GPROF_RET
  88
  89 NON_GPROF_ENTRY(clock_lock)
  90         SPIN_LOCK(clock_spinlock)
  91         NON_GPROF_RET
  92
  93 NON_GPROF_ENTRY(clock_unlock)
  94         SPIN_UNLOCK(clock_spinlock)
  95         NON_GPROF_RET
  96
  97 NON_GPROF_ENTRY(com_lock)
  98         SPIN_LOCK(com_spinlock)
  99         NON_GPROF_RET
 100
 101 NON_GPROF_ENTRY(com_unlock)
 102         SPIN_UNLOCK(com_spinlock)
 103         NON_GPROF_RET
 104
 105 NON_GPROF_ENTRY(cons_lock)
 106         SPIN_LOCK(cons_spinlock)
 107         NON_GPROF_RET
 108
 109 NON_GPROF_ENTRY(cons_unlock)
 110         SPIN_UNLOCK(cons_spinlock)
 111         NON_GPROF_RET
 112