1 /*- 2 * Copyright (c) 2001 Wind River Systems, Inc. 3 * All rights reserved. 4 * Written by: John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 4. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD: stable/9/sys/sys/pcpu.h 224221 2011-07-19 16:50:55Z attilio $ 31 */ 32 33 #ifndef _SYS_PCPU_H_ 34 #define _SYS_PCPU_H_ 35 36 #ifdef LOCORE 37 #error "no assembler-serviceable parts inside" 38 #endif 39 40 #include <sys/_cpuset.h> 41 #include <sys/queue.h> 42 #include <sys/vmmeter.h> 43 #include <sys/resource.h> 44 #include <machine/pcpu.h> 45 46 #define DPCPU_SETNAME "set_pcpu" 47 #define DPCPU_SYMPREFIX "pcpu_entry_" 48 49 #ifdef _KERNEL 50 51 /* 52 * Define a set for pcpu data. 53 */ 54 extern uintptr_t *__start_set_pcpu; 55 __GLOBL(__start_set_pcpu); 56 extern uintptr_t *__stop_set_pcpu; 57 __GLOBL(__stop_set_pcpu); 58 59 /* 60 * Array of dynamic pcpu base offsets. Indexed by id. 61 */ 62 extern uintptr_t dpcpu_off[]; 63 64 /* 65 * Convenience defines. 66 */ 67 #define DPCPU_START ((uintptr_t)&__start_set_pcpu) 68 #define DPCPU_STOP ((uintptr_t)&__stop_set_pcpu) 69 #define DPCPU_BYTES (DPCPU_STOP - DPCPU_START) 70 #define DPCPU_MODMIN 2048 71 #define DPCPU_SIZE roundup2(DPCPU_BYTES, PAGE_SIZE) 72 #define DPCPU_MODSIZE (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN)) 73 74 /* 75 * Declaration and definition. 76 */ 77 #define DPCPU_NAME(n) pcpu_entry_##n 78 #define DPCPU_DECLARE(t, n) extern t DPCPU_NAME(n) 79 #define DPCPU_DEFINE(t, n) t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used 80 81 /* 82 * Accessors with a given base. 83 */ 84 #define _DPCPU_PTR(b, n) \ 85 (__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n)) 86 #define _DPCPU_GET(b, n) (*_DPCPU_PTR(b, n)) 87 #define _DPCPU_SET(b, n, v) (*_DPCPU_PTR(b, n) = v) 88 89 /* 90 * Accessors for the current cpu. 91 */ 92 #define DPCPU_PTR(n) _DPCPU_PTR(PCPU_GET(dynamic), n) 93 #define DPCPU_GET(n) (*DPCPU_PTR(n)) 94 #define DPCPU_SET(n, v) (*DPCPU_PTR(n) = v) 95 96 /* 97 * Accessors for remote cpus. 98 */ 99 #define DPCPU_ID_PTR(i, n) _DPCPU_PTR(dpcpu_off[(i)], n) 100 #define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n)) 101 #define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v) 102 103 /* 104 * Utility macros. 105 */ 106 #define DPCPU_SUM(n) __extension__ \ 107 ({ \ 108 u_int _i; \ 109 __typeof(*DPCPU_PTR(n)) sum; \ 110 \ 111 sum = 0; \ 112 CPU_FOREACH(_i) { \ 113 sum += *DPCPU_ID_PTR(_i, n); \ 114 } \ 115 sum; \ 116 }) 117 118 #define DPCPU_VARSUM(n, var) __extension__ \ 119 ({ \ 120 u_int _i; \ 121 __typeof((DPCPU_PTR(n))->var) sum; \ 122 \ 123 sum = 0; \ 124 CPU_FOREACH(_i) { \ 125 sum += (DPCPU_ID_PTR(_i, n))->var; \ 126 } \ 127 sum; \ 128 }) 129 130 #define DPCPU_ZERO(n) do { \ 131 u_int _i; \ 132 \ 133 CPU_FOREACH(_i) { \ 134 bzero(DPCPU_ID_PTR(_i, n), sizeof(*DPCPU_PTR(n))); \ 135 } \ 136 } while(0) 137 138 #endif /* _KERNEL */ 139 140 /* 141 * XXXUPS remove as soon as we have per cpu variable 142 * linker sets and can define rm_queue in _rm_lock.h 143 */ 144 struct rm_queue { 145 struct rm_queue* volatile rmq_next; 146 struct rm_queue* volatile rmq_prev; 147 }; 148 149 /* 150 * This structure maps out the global data that needs to be kept on a 151 * per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR 152 * macros defined in <machine/pcpu.h>. Machine dependent fields are 153 * defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>. 154 */ 155 struct pcpu { 156 struct thread *pc_curthread; /* Current thread */ 157 struct thread *pc_idlethread; /* Idle thread */ 158 struct thread *pc_fpcurthread; /* Fp state owner */ 159 struct thread *pc_deadthread; /* Zombie thread or NULL */ 160 struct pcb *pc_curpcb; /* Current pcb */ 161 uint64_t pc_switchtime; /* cpu_ticks() at last csw */ 162 int pc_switchticks; /* `ticks' at last csw */ 163 u_int pc_cpuid; /* This cpu number */ 164 STAILQ_ENTRY(pcpu) pc_allcpu; 165 struct lock_list_entry *pc_spinlocks; 166 struct vmmeter pc_cnt; /* VM stats counters */ 167 long pc_cp_time[CPUSTATES]; /* statclock ticks */ 168 struct device *pc_device; 169 void *pc_netisr; /* netisr SWI cookie */ 170 int pc_dnweight; /* vm_page_dontneed() */ 171 int pc_domain; /* Memory domain. */ 172 173 /* 174 * Stuff for read mostly lock 175 * 176 * XXXUPS remove as soon as we have per cpu variable 177 * linker sets. 178 */ 179 struct rm_queue pc_rm_queue; 180 181 uintptr_t pc_dynamic; /* Dynamic per-cpu data area */ 182 183 /* 184 * Keep MD fields last, so that CPU-specific variations on a 185 * single architecture don't result in offset variations of 186 * the machine-independent fields of the pcpu. Even though 187 * the pcpu structure is private to the kernel, some ports 188 * (e.g., lsof, part of gtop) define _KERNEL and include this 189 * header. While strictly speaking this is wrong, there's no 190 * reason not to keep the offsets of the MI fields constant 191 * if only to make kernel debugging easier. 192 */ 193 PCPU_MD_FIELDS; 194 } __aligned(CACHE_LINE_SIZE); 195 196 #ifdef _KERNEL 197 198 STAILQ_HEAD(cpuhead, pcpu); 199 200 extern struct cpuhead cpuhead; 201 extern struct pcpu *cpuid_to_pcpu[]; 202 203 #define curcpu PCPU_GET(cpuid) 204 #define curproc (curthread->td_proc) 205 #ifndef curthread 206 #define curthread PCPU_GET(curthread) 207 #endif 208 #define curvidata PCPU_GET(vidata) 209 210 /* 211 * Machine dependent callouts. cpu_pcpu_init() is responsible for 212 * initializing machine dependent fields of struct pcpu, and 213 * db_show_mdpcpu() is responsible for handling machine dependent 214 * fields for the DDB 'show pcpu' command. 215 */ 216 void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size); 217 void db_show_mdpcpu(struct pcpu *pcpu); 218 219 void *dpcpu_alloc(int size); 220 void dpcpu_copy(void *s, int size); 221 void dpcpu_free(void *s, int size); 222 void dpcpu_init(void *dpcpu, int cpuid); 223 void pcpu_destroy(struct pcpu *pcpu); 224 struct pcpu *pcpu_find(u_int cpuid); 225 void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size); 226 227 #endif /* _KERNEL */ 228 229 #endif /* !_SYS_PCPU_H_ */ 230