xref: /titanic_41/usr/src/uts/intel/asm/clock.h (revision 6b7143d774683daf27dfb2e93ab48d1ade1a3477)
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
unlock_hres_lock(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
__rdtsc_insn(void)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 */
84