pcpu.h revision 225736
1/*- 2 * Copyright (c) Peter Wemm 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 * 26 * $FreeBSD: stable/9/sys/i386/include/pcpu.h 216956 2011-01-04 14:49:54Z rwatson $ 27 */ 28 29#ifndef _MACHINE_PCPU_H_ 30#define _MACHINE_PCPU_H_ 31 32#ifndef _SYS_CDEFS_H_ 33#error "sys/cdefs.h is a prerequisite for this file" 34#endif 35 36#include <machine/segments.h> 37#include <machine/tss.h> 38 39/* 40 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 41 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 42 * The reason for doing it via a struct is so that an array of pointers 43 * to each CPU's data can be set up for things like "check curproc on all 44 * other processors" 45 */ 46 47#if defined(XEN) || defined(XENHVM) 48#ifndef NR_VIRQS 49#define NR_VIRQS 24 50#endif 51#ifndef NR_IPIS 52#define NR_IPIS 2 53#endif 54#endif 55 56#if defined(XEN) 57 58/* These are peridically updated in shared_info, and then copied here. */ 59struct shadow_time_info { 60 uint64_t tsc_timestamp; /* TSC at last update of time vals. */ 61 uint64_t system_timestamp; /* Time, in nanosecs, since boot. */ 62 uint32_t tsc_to_nsec_mul; 63 uint32_t tsc_to_usec_mul; 64 int tsc_shift; 65 uint32_t version; 66}; 67 68#define PCPU_XEN_FIELDS \ 69 ; \ 70 u_int pc_cr3; /* track cr3 for R1/R3*/ \ 71 vm_paddr_t *pc_pdir_shadow; \ 72 uint64_t pc_processed_system_time; \ 73 struct shadow_time_info pc_shadow_time; \ 74 int pc_resched_irq; \ 75 int pc_callfunc_irq; \ 76 int pc_virq_to_irq[NR_VIRQS]; \ 77 int pc_ipi_to_irq[NR_IPIS] 78 79#elif defined(XENHVM) 80 81#define PCPU_XEN_FIELDS \ 82 ; \ 83 unsigned int pc_last_processed_l1i; \ 84 unsigned int pc_last_processed_l2i 85 86#else /* !XEN && !XENHVM */ 87 88#define PCPU_XEN_FIELDS 89 90#endif 91 92#define PCPU_MD_FIELDS \ 93 char pc_monitorbuf[128] __aligned(128); /* cache line */ \ 94 struct pcpu *pc_prvspace; /* Self-reference */ \ 95 struct pmap *pc_curpmap; \ 96 struct i386tss pc_common_tss; \ 97 struct segment_descriptor pc_common_tssd; \ 98 struct segment_descriptor *pc_tss_gdt; \ 99 struct segment_descriptor *pc_fsgs_gdt; \ 100 int pc_currentldt; \ 101 u_int pc_acpi_id; /* ACPI CPU id */ \ 102 u_int pc_apic_id; \ 103 int pc_private_tss; /* Flag indicating private tss*/\ 104 u_int pc_cmci_mask /* MCx banks for CMCI */ \ 105 PCPU_XEN_FIELDS 106 107#ifdef _KERNEL 108 109#ifdef lint 110 111extern struct pcpu *pcpup; 112 113#define PCPU_GET(member) (pcpup->pc_ ## member) 114#define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val)) 115#define PCPU_INC(member) PCPU_ADD(member, 1) 116#define PCPU_PTR(member) (&pcpup->pc_ ## member) 117#define PCPU_SET(member, val) (pcpup->pc_ ## member = (val)) 118 119#elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) 120 121/* 122 * Evaluates to the byte offset of the per-cpu variable name. 123 */ 124#define __pcpu_offset(name) \ 125 __offsetof(struct pcpu, name) 126 127/* 128 * Evaluates to the type of the per-cpu variable name. 129 */ 130#define __pcpu_type(name) \ 131 __typeof(((struct pcpu *)0)->name) 132 133/* 134 * Evaluates to the address of the per-cpu variable name. 135 */ 136#define __PCPU_PTR(name) __extension__ ({ \ 137 __pcpu_type(name) *__p; \ 138 \ 139 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \ 140 : "=r" (__p) \ 141 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \ 142 "i" (__pcpu_offset(name))); \ 143 \ 144 __p; \ 145}) 146 147/* 148 * Evaluates to the value of the per-cpu variable name. 149 */ 150#define __PCPU_GET(name) __extension__ ({ \ 151 __pcpu_type(name) __res; \ 152 struct __s { \ 153 u_char __b[MIN(sizeof(__res), 4)]; \ 154 } __s; \ 155 \ 156 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \ 157 sizeof(__res) == 4) { \ 158 __asm __volatile("mov %%fs:%1,%0" \ 159 : "=r" (__s) \ 160 : "m" (*(struct __s *)(__pcpu_offset(name)))); \ 161 *(struct __s *)(void *)&__res = __s; \ 162 } else { \ 163 __res = *__PCPU_PTR(name); \ 164 } \ 165 __res; \ 166}) 167 168/* 169 * Adds a value of the per-cpu counter name. The implementation 170 * must be atomic with respect to interrupts. 171 */ 172#define __PCPU_ADD(name, val) do { \ 173 __pcpu_type(name) __val; \ 174 struct __s { \ 175 u_char __b[MIN(sizeof(__val), 4)]; \ 176 } __s; \ 177 \ 178 __val = (val); \ 179 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 180 sizeof(__val) == 4) { \ 181 __s = *(struct __s *)(void *)&__val; \ 182 __asm __volatile("add %1,%%fs:%0" \ 183 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 184 : "r" (__s)); \ 185 } else \ 186 *__PCPU_PTR(name) += __val; \ 187} while (0) 188 189/* 190 * Increments the value of the per-cpu counter name. The implementation 191 * must be atomic with respect to interrupts. 192 */ 193#define __PCPU_INC(name) do { \ 194 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \ 195 sizeof(__pcpu_type(name)) == 2 || \ 196 sizeof(__pcpu_type(name)) == 4); \ 197 if (sizeof(__pcpu_type(name)) == 1) { \ 198 __asm __volatile("incb %%fs:%0" \ 199 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 200 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 201 } else if (sizeof(__pcpu_type(name)) == 2) { \ 202 __asm __volatile("incw %%fs:%0" \ 203 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 204 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 205 } else if (sizeof(__pcpu_type(name)) == 4) { \ 206 __asm __volatile("incl %%fs:%0" \ 207 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\ 208 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\ 209 } \ 210} while (0) 211 212/* 213 * Sets the value of the per-cpu variable name to value val. 214 */ 215#define __PCPU_SET(name, val) do { \ 216 __pcpu_type(name) __val; \ 217 struct __s { \ 218 u_char __b[MIN(sizeof(__val), 4)]; \ 219 } __s; \ 220 \ 221 __val = (val); \ 222 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \ 223 sizeof(__val) == 4) { \ 224 __s = *(struct __s *)(void *)&__val; \ 225 __asm __volatile("mov %1,%%fs:%0" \ 226 : "=m" (*(struct __s *)(__pcpu_offset(name))) \ 227 : "r" (__s)); \ 228 } else { \ 229 *__PCPU_PTR(name) = __val; \ 230 } \ 231} while (0) 232 233#define PCPU_GET(member) __PCPU_GET(pc_ ## member) 234#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val) 235#define PCPU_INC(member) __PCPU_INC(pc_ ## member) 236#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member) 237#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val) 238 239static __inline __pure2 struct thread * 240__curthread(void) 241{ 242 struct thread *td; 243 244 __asm("movl %%fs:0,%0" : "=r" (td)); 245 return (td); 246} 247#define curthread (__curthread()) 248 249#else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */ 250 251#error "this file needs to be ported to your compiler" 252 253#endif /* lint, etc. */ 254 255#endif /* _KERNEL */ 256 257#endif /* !_MACHINE_PCPU_H_ */ 258