usr/src/uts/intel/asm/clock.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _ASM_CLOCK_H
  27 #define _ASM_CLOCK_H
  28
  29 #include <sys/ccompile.h>
  30 #include <sys/types.h>
  31 #include <sys/time.h>
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 #if !defined(__lint) && defined(__GNUC__)
  38
  39 #include <sys/machlock.h>
  40
  41 extern __GNU_INLINE void
  42 unlock_hres_lock(void)
  43 {
  44         __asm__ __volatile__(
  45             "lock; incl %0"
  46             : /* no output */
  47             : "m" (hres_lock)
  48             : "cc");
  49 }
  50
  51 #if defined(__xpv)
  52
  53 extern __GNU_INLINE hrtime_t
  54 __rdtsc_insn(void)
  55 {
  56 #if defined(__amd64)
  57         uint32_t lobits, hibits;
  58
  59         __asm__ __volatile__(
  60             "rdtsc"
  61             : "=a" (lobits), "=d" (hibits));
  62         return (lobits | ((hrtime_t)hibits << 32));
  63 #elif defined(__i386)
  64         hrtime_t __value;
  65
  66         __asm__ __volatile__(
  67             "rdtsc"
  68             : "=A" (__value));
  69         return (__value);
  70 #else
  71 #error  "port me"
  72 #endif
  73 }
  74
  75 #endif /* __xpv */
  76
  77 #endif  /* !__lint && __GNUC__ */
  78
  79 #ifdef  __cplusplus
  80 }
  81 #endif
  82
  83 #endif  /* _ASM_CLOCK_H */