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      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 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     30 
     31 #include <sys/types.h>
     32 #include <sys/time.h>
     33 
     34 #ifdef	__cplusplus
     35 extern "C" {
     36 #endif
     37 
     38 #if !defined(__lint) && defined(__GNUC__)
     39 
     40 #include <sys/machlock.h>
     41 
     42 extern __inline__ void 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 __inline__ hrtime_t __rdtsc_insn(void)
     54 {
     55 #if defined(__amd64)
     56 	uint32_t lobits, hibits;
     57 
     58 	__asm__ __volatile__(
     59 	    "rdtsc"
     60 	    : "=a" (lobits), "=d" (hibits));
     61 	return (lobits | ((hrtime_t)hibits << 32));
     62 #elif defined(__i386)
     63 	hrtime_t __value;
     64 
     65 	__asm__ __volatile__(
     66 	    "rdtsc"
     67 	    : "=A" (__value));
     68 	return (__value);
     69 #else
     70 #error	"port me"
     71 #endif
     72 }
     73 
     74 #endif /* __xpv */
     75 
     76 #endif	/* !__lint && __GNUC__ */
     77 
     78 #ifdef	__cplusplus
     79 }
     80 #endif
     81 
     82 #endif	/* _ASM_CLOCK_H */
     83