1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright 2018 Joyent, Inc.
  27  */
  28 
  29 #ifndef _ASM_HTABLE_H
  30 #define _ASM_HTABLE_H
  31 
  32 #include <sys/ccompile.h>
  33 #include <sys/types.h>
  34 
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38 
  39 #if !defined(__lint) && defined(__GNUC__)
  40 
  41 /*
  42  * This set of atomic operations are designed primarily
  43  * for some ia32 hat layer operations.
  44  */
  45 
  46 extern __GNU_INLINE void
  47 atomic_orb(uint8_t *addr, uint8_t value)
  48 {
  49         __asm__ __volatile__(
  50             "lock; orb %%dl,%0"
  51             : "=m" (*addr)
  52             : "d" (value), "m" (*addr)
  53             : "cc");
  54 }
  55 
  56 extern __GNU_INLINE void
  57 atomic_andb(uint8_t *addr, uint8_t value)
  58 {
  59         __asm__ __volatile__(
  60             "lock; andb %%dl,%0"
  61             : "=m" (*addr)
  62             : "d" (value), "m" (*addr)
  63             : "cc");
  64 }
  65 
  66 extern __GNU_INLINE void
  67 atomic_inc16(uint16_t *addr)
  68 {
  69         __asm__ __volatile__(
  70             "lock; incw %0"
  71             : "=m" (*addr)
  72             : "m" (*addr)
  73             : "cc");
  74 }
  75 
  76 extern __GNU_INLINE void
  77 atomic_dec16(uint16_t *addr)
  78 {
  79         __asm__ __volatile__(
  80             "lock; decw %0"
  81             : "=m" (*addr)
  82             : "m" (*addr)
  83             : "cc");
  84 }
  85 
  86 #endif  /* !__lint && __GNUC__ */
  87 
  88 #ifdef  __cplusplus
  89 }
  90 #endif
  91 
  92 #endif  /* _ASM_HTABLE_H */