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 * Copyright 2019 Joyent, Inc. 27 */ 28 29 #ifndef _ASM_CPU_H 30 #define _ASM_CPU_H 31 32 #include <sys/ccompile.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 #if !defined(__lint) && defined(__GNUC__) 39 40 #if defined(__i386) || defined(__amd64) 41 42 extern __GNU_INLINE void 43 ht_pause(void) 44 { 45 __asm__ __volatile__( 46 "pause"); 47 } 48 49 /* 50 * prefetch 64 bytes 51 * 52 * prefetch is an SSE extension which is not supported on 53 * older 32-bit processors, so define this as a no-op for now 54 */ 55 56 extern __GNU_INLINE void 57 prefetch_read_many(void *addr) 58 { 59 #if defined(__amd64) 60 __asm__( 61 "prefetcht0 (%0);" 62 "prefetcht0 32(%0);" 63 : /* no output */ 64 : "r" (addr)); 65 #endif /* __amd64 */ 66 } 67 68 extern __GNU_INLINE void 69 prefetch_read_once(void *addr) 70 { 71 #if defined(__amd64) 72 __asm__( 73 "prefetchnta (%0);" 74 "prefetchnta 32(%0);" 75 : /* no output */ 76 : "r" (addr)); 77 #endif /* __amd64 */ 78 } 79 80 extern __GNU_INLINE void 81 prefetch_write_many(void *addr) 82 { 83 #if defined(__amd64) 84 __asm__( 85 "prefetcht0 (%0);" 86 "prefetcht0 32(%0);" 87 : /* no output */ 88 : "r" (addr)); 89 #endif /* __amd64 */ 90 } 91 92 extern __GNU_INLINE void 93 prefetch_write_once(void *addr) 94 { 95 #if defined(__amd64) 96 __asm__( 97 "prefetcht0 (%0);" 98 "prefetcht0 32(%0);" 99 : /* no output */ 100 : "r" (addr)); 101 #endif /* __amd64 */ 102 } 103 104 #if !defined(__xpv) 105 106 extern __GNU_INLINE void 107 cli(void) 108 { 109 __asm__ __volatile__( 110 "cli" : : : "memory"); 111 } 112 113 extern __GNU_INLINE void 114 sti(void) 115 { 116 __asm__ __volatile__( 117 "sti"); 118 } 119 120 /* 121 * Any newer callers of halt need to make sure that they consider calling 122 * x86_md_clear() before calling this to deal with any potential issues with 123 * MDS. Because this version of hlt is also used in panic context, we do not 124 * unconditionally call x86_md_clear() here and require callers to do so. 125 */ 126 extern __GNU_INLINE void 127 i86_halt(void) 128 { 129 __asm__ __volatile__( 130 "sti; hlt"); 131 } 132 133 #endif /* !__xpv */ 134 135 #endif /* __i386 || defined(__amd64) */ 136 137 #if defined(__amd64) 138 139 extern __GNU_INLINE void 140 __set_ds(selector_t value) 141 { 142 __asm__ __volatile__( 143 "movw %0, %%ds" 144 : /* no output */ 145 : "r" (value)); 146 } 147 148 extern __GNU_INLINE void 149 __set_es(selector_t value) 150 { 151 __asm__ __volatile__( 152 "movw %0, %%es" 153 : /* no output */ 154 : "r" (value)); 155 } 156 157 extern __GNU_INLINE void 158 __set_fs(selector_t value) 159 { 160 __asm__ __volatile__( 161 "movw %0, %%fs" 162 : /* no output */ 163 : "r" (value)); 164 } 165 166 extern __GNU_INLINE void 167 __set_gs(selector_t value) 168 { 169 __asm__ __volatile__( 170 "movw %0, %%gs" 171 : /* no output */ 172 : "r" (value)); 173 } 174 175 #if !defined(__xpv) 176 177 extern __GNU_INLINE void 178 __swapgs(void) 179 { 180 __asm__ __volatile__( 181 "mfence; swapgs"); 182 } 183 184 #endif /* !__xpv */ 185 186 #endif /* __amd64 */ 187 188 #endif /* !__lint && __GNUC__ */ 189 190 #ifdef __cplusplus 191 } 192 #endif 193 194 #endif /* _ASM_CPU_H */ 195