usr/src/uts/intel/asm/htable.h

   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
  40 /*
  41  * This set of atomic operations are designed primarily
  42  * for some ia32 hat layer operations.
  43  */
  44
  45 extern __GNU_INLINE void
  46 atomic_orb(uint8_t *addr, uint8_t value)
  47 {
  48         __asm__ __volatile__(
  49             "lock; orb %%dl,%0"
  50             : "=m" (*addr)
  51             : "d" (value), "m" (*addr)
  52             : "cc");
  53 }
  54
  55 extern __GNU_INLINE void
  56 atomic_andb(uint8_t *addr, uint8_t value)
  57 {
  58         __asm__ __volatile__(
  59             "lock; andb %%dl,%0"
  60             : "=m" (*addr)
  61             : "d" (value), "m" (*addr)
  62             : "cc");
  63 }
  64
  65 extern __GNU_INLINE void
  66 atomic_inc16(uint16_t *addr)
  67 {
  68         __asm__ __volatile__(
  69             "lock; incw %0"
  70             : "=m" (*addr)
  71             : "m" (*addr)
  72             : "cc");
  73 }
  74
  75 extern __GNU_INLINE void
  76 atomic_dec16(uint16_t *addr)
  77 {
  78         __asm__ __volatile__(
  79             "lock; decw %0"
  80             : "=m" (*addr)
  81             : "m" (*addr)
  82             : "cc");
  83 }
  84
  85 #ifdef  __cplusplus
  86 }
  87 #endif
  88
  89 #endif  /* _ASM_HTABLE_H */