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 #else /* __xpv */ 75 76 /* 77 * rdtsc may not exist on 32-bit, so we don't have an inline for it. 78 */ 79 #if defined(__amd64) 80 extern __inline__ hrtime_t tsc_read(void) 81 { 82 uint32_t lobits, hibits; 83 84 __asm__ __volatile__( 85 "rdtsc" 86 : "=a" (lobits), "=d" (hibits)); 87 return (lobits | ((hrtime_t)hibits << 32)); 88 } 89 #endif /* __amd64 */ 90 91 #endif /* __xpv */ 92 93 #endif /* !__lint && __GNUC__ */ 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* _ASM_CLOCK_H */ 100