1/*- 2 * Copyright (c) Peter Wemm <peter@netplex.com.au> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 *
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26 * $FreeBSD: head/sys/amd64/include/pcpu.h 122829 2003-11-17 03:40:41Z bde $
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26 * $FreeBSD: head/sys/amd64/include/pcpu.h 122833 2003-11-17 04:40:58Z bde $ |
27 */ 28 29#ifndef _MACHINE_PCPU_H_ 30#define _MACHINE_PCPU_H_ 31 32#ifdef _KERNEL 33 34/* 35 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 36 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 37 * The reason for doing it via a struct is so that an array of pointers 38 * to each CPU's data can be set up for things like "check curproc on all 39 * other processors" 40 */ 41#define PCPU_MD_FIELDS \ 42 struct pcpu *pc_prvspace; /* Self-reference */ \ 43 register_t pc_scratch_rsp; /* User %rsp in syscall */ \ 44 u_int pc_acpi_id /* ACPI CPU id */ 45 46#if defined(lint) 47 48extern struct pcpu *pcpup; 49 50#define PCPU_GET(member) (pcpup->pc_ ## member) 51#define PCPU_PTR(member) (&pcpup->pc_ ## member) 52#define PCPU_SET(member,value) (pcpup->pc_ ## member = (value)) 53 54#elif defined(__GNUC__) 55 56/* 57 * Evaluates to the byte offset of the per-cpu variable name. 58 */ 59#define __pcpu_offset(name) \ 60 __offsetof(struct pcpu, name) 61 62/* 63 * Evaluates to the type of the per-cpu variable name. 64 */ 65#define __pcpu_type(name) \ 66 __typeof(((struct pcpu *)0)->name) 67 68/* 69 * Evaluates to the address of the per-cpu variable name. 70 */
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71#define __PCPU_PTR(name) ({ \
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71#define __PCPU_PTR(name) __extension__ ({ \ |
72 __pcpu_type(name) *__p; \ 73 \ 74 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \ 75 : "=r" (__p) \ 76 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \ 77 "i" (__pcpu_offset(name))); \ 78 \ 79 __p; \ 80}) 81 82/* 83 * Evaluates to the value of the per-cpu variable name. 84 */
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85#define __PCPU_GET(name) ({ \
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85#define __PCPU_GET(name) __extension__ ({ \ |
86 __pcpu_type(name) __result; \ 87 \ 88 if (sizeof(__result) == 1) { \ 89 u_char __b; \ 90 __asm __volatile("movb %%gs:%1,%0" \ 91 : "=r" (__b) \ 92 : "m" (*(u_char *)(__pcpu_offset(name)))); \ 93 __result = *(__pcpu_type(name) *)&__b; \ 94 } else if (sizeof(__result) == 2) { \ 95 u_short __w; \ 96 __asm __volatile("movw %%gs:%1,%0" \ 97 : "=r" (__w) \ 98 : "m" (*(u_short *)(__pcpu_offset(name)))); \ 99 __result = *(__pcpu_type(name) *)&__w; \ 100 } else if (sizeof(__result) == 4) { \ 101 u_int __i; \ 102 __asm __volatile("movl %%gs:%1,%0" \ 103 : "=r" (__i) \ 104 : "m" (*(u_int *)(__pcpu_offset(name)))); \ 105 __result = *(__pcpu_type(name) *)&__i; \ 106 } else if (sizeof(__result) == 8) { \ 107 u_long __l; \ 108 __asm __volatile("movq %%gs:%1,%0" \ 109 : "=r" (__l) \ 110 : "m" (*(u_long *)(__pcpu_offset(name)))); \ 111 __result = *(__pcpu_type(name) *)&__l; \ 112 } else { \ 113 __result = *__PCPU_PTR(name); \ 114 } \ 115 \ 116 __result; \ 117}) 118 119/* 120 * Sets the value of the per-cpu variable name to value val. 121 */
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122#define __PCPU_SET(name, val) ({ \
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122#define __PCPU_SET(name, val) { \ |
123 __pcpu_type(name) __val = (val); \ 124 \ 125 if (sizeof(__val) == 1) { \ 126 u_char __b; \ 127 __b = *(u_char *)&__val; \ 128 __asm __volatile("movb %1,%%gs:%0" \ 129 : "=m" (*(u_char *)(__pcpu_offset(name))) \ 130 : "r" (__b)); \ 131 } else if (sizeof(__val) == 2) { \ 132 u_short __w; \ 133 __w = *(u_short *)&__val; \ 134 __asm __volatile("movw %1,%%gs:%0" \ 135 : "=m" (*(u_short *)(__pcpu_offset(name))) \ 136 : "r" (__w)); \ 137 } else if (sizeof(__val) == 4) { \ 138 u_int __i; \ 139 __i = *(u_int *)&__val; \ 140 __asm __volatile("movl %1,%%gs:%0" \ 141 : "=m" (*(u_int *)(__pcpu_offset(name))) \ 142 : "r" (__i)); \ 143 } else if (sizeof(__val) == 8) { \ 144 u_long __l; \ 145 __l = *(u_long *)&__val; \ 146 __asm __volatile("movq %1,%%gs:%0" \ 147 : "=m" (*(u_long *)(__pcpu_offset(name))) \ 148 : "r" (__l)); \ 149 } else { \ 150 *__PCPU_PTR(name) = __val; \ 151 } \
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152})
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152} |
153 154#define PCPU_GET(member) __PCPU_GET(pc_ ## member) 155#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member) 156#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val) 157 158#else 159#error gcc or lint is required to use this file 160#endif 161 162#endif /* _KERNEL */ 163 164#endif /* ! _MACHINE_PCPU_H_ */
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