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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _ASM_CPU_H 27 #define _ASM_CPU_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #if !defined(__lint) && defined(__GNUC__) 34 35 #if defined(__i386) || defined(__amd64) 36 37 extern __inline__ void ht_pause(void) 38 { 39 __asm__ __volatile__( 40 "pause"); 41 } 42 43 #if !defined(__xpv) 44 45 extern __inline__ void cli(void) 46 { 47 __asm__ __volatile__( 48 "cli" : : : "memory"); 49 } 50 51 extern __inline__ void sti(void) 52 { 53 __asm__ __volatile__( 54 "sti"); 55 } 56 57 extern __inline__ void i86_halt(void) 58 { 59 __asm__ __volatile__( 60 "sti; hlt"); 61 } 62 63 #endif /* !__xpv */ 64 65 #endif /* __i386 || defined(__amd64) */ 66 67 #if defined(__amd64) 68 69 extern __inline__ void __set_ds(selector_t value) 70 { 71 __asm__ __volatile__( 72 "movw %0, %%ds" 73 : /* no output */ 74 : "r" (value)); 75 } 76 77 extern __inline__ void __set_es(selector_t value) 78 { 79 __asm__ __volatile__( 80 "movw %0, %%es" 81 : /* no output */ 82 : "r" (value)); 83 } 84 85 extern __inline__ void __set_fs(selector_t value) 86 { 87 __asm__ __volatile__( 88 "movw %0, %%fs" 89 : /* no output */ 90 : "r" (value)); 91 } 92 93 extern __inline__ void __set_gs(selector_t value) 94 { 95 __asm__ __volatile__( 96 "movw %0, %%gs" 97 : /* no output */ 98 : "r" (value)); 99 } 100 101 #if !defined(__xpv) 102 103 extern __inline__ void __swapgs(void) 104 { 105 __asm__ __volatile__( 106 "mfence; swapgs"); 107 } 108 109 #endif /* !__xpv */ 110 111 #endif /* __amd64 */ 112 113 #endif /* !__lint && __GNUC__ */ 114 115 #if !defined(__lint) && defined(__GNUC__) 116 117 #if defined(__i386) || defined(__amd64) 118 119 /* 120 * prefetch 64 bytes 121 * prefetch is an SSE extension which is not supported on 122 * older 32-bit processors, so define this as a no-op for now 123 */ 124 125 extern __inline__ void prefetch64(caddr_t addr) 126 { 127 #if defined(__amd64) 128 __asm__ __volatile__( 129 "prefetcht0 (%0);" 130 "prefetcht0 32(%0)" 131 : /* no output */ 132 : "r" (addr)); 133 #endif /* __amd64 */ 134 } 135 136 #endif /* __i386 || __amd64 */ 137 138 #endif /* !__lint && __GNUC__ */ 139 140 #ifdef __cplusplus 141 } 142 #endif 143 144 #endif /* _ASM_CPU_H */ 145