The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/pcpu.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    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: releng/11.1/sys/sys/pcpu.h 299108 2016-05-05 02:51:31Z ngie $
   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/_lock.h>
   42 #include <sys/_mutex.h>
   43 #include <sys/_sx.h>
   44 #include <sys/queue.h>
   45 #include <sys/_rmlock.h>
   46 #include <sys/vmmeter.h>
   47 #include <sys/resource.h>
   48 #include <machine/pcpu.h>
   49 
   50 #define DPCPU_SETNAME           "set_pcpu"
   51 #define DPCPU_SYMPREFIX         "pcpu_entry_"
   52 
   53 #ifdef _KERNEL
   54 
   55 /*
   56  * Define a set for pcpu data.
   57  */
   58 extern uintptr_t *__start_set_pcpu;
   59 __GLOBL(__start_set_pcpu);
   60 extern uintptr_t *__stop_set_pcpu;
   61 __GLOBL(__stop_set_pcpu);
   62 
   63 /*
   64  * Array of dynamic pcpu base offsets.  Indexed by id.
   65  */
   66 extern uintptr_t dpcpu_off[];
   67 
   68 /*
   69  * Convenience defines.
   70  */
   71 #define DPCPU_START             ((uintptr_t)&__start_set_pcpu)
   72 #define DPCPU_STOP              ((uintptr_t)&__stop_set_pcpu)
   73 #define DPCPU_BYTES             (DPCPU_STOP - DPCPU_START)
   74 #define DPCPU_MODMIN            2048
   75 #define DPCPU_SIZE              roundup2(DPCPU_BYTES, PAGE_SIZE)
   76 #define DPCPU_MODSIZE           (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN))
   77 
   78 /*
   79  * Declaration and definition.
   80  */
   81 #define DPCPU_NAME(n)           pcpu_entry_##n
   82 #define DPCPU_DECLARE(t, n)     extern t DPCPU_NAME(n)
   83 #define DPCPU_DEFINE(t, n)      t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used
   84 
   85 /*
   86  * Accessors with a given base.
   87  */
   88 #define _DPCPU_PTR(b, n)                                                \
   89     (__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n))
   90 #define _DPCPU_GET(b, n)        (*_DPCPU_PTR(b, n))
   91 #define _DPCPU_SET(b, n, v)     (*_DPCPU_PTR(b, n) = v)
   92 
   93 /*
   94  * Accessors for the current cpu.
   95  */
   96 #define DPCPU_PTR(n)            _DPCPU_PTR(PCPU_GET(dynamic), n)
   97 #define DPCPU_GET(n)            (*DPCPU_PTR(n))
   98 #define DPCPU_SET(n, v)         (*DPCPU_PTR(n) = v)
   99 
  100 /*
  101  * Accessors for remote cpus.
  102  */
  103 #define DPCPU_ID_PTR(i, n)      _DPCPU_PTR(dpcpu_off[(i)], n)
  104 #define DPCPU_ID_GET(i, n)      (*DPCPU_ID_PTR(i, n))
  105 #define DPCPU_ID_SET(i, n, v)   (*DPCPU_ID_PTR(i, n) = v)
  106 
  107 /*
  108  * Utility macros.
  109  */
  110 #define DPCPU_SUM(n) __extension__                                      \
  111 ({                                                                      \
  112         u_int _i;                                                       \
  113         __typeof(*DPCPU_PTR(n)) sum;                                    \
  114                                                                         \
  115         sum = 0;                                                        \
  116         CPU_FOREACH(_i) {                                               \
  117                 sum += *DPCPU_ID_PTR(_i, n);                            \
  118         }                                                               \
  119         sum;                                                            \
  120 })
  121 
  122 #define DPCPU_VARSUM(n, var) __extension__                              \
  123 ({                                                                      \
  124         u_int _i;                                                       \
  125         __typeof((DPCPU_PTR(n))->var) sum;                              \
  126                                                                         \
  127         sum = 0;                                                        \
  128         CPU_FOREACH(_i) {                                               \
  129                 sum += (DPCPU_ID_PTR(_i, n))->var;                      \
  130         }                                                               \
  131         sum;                                                            \
  132 })
  133 
  134 #define DPCPU_ZERO(n) do {                                              \
  135         u_int _i;                                                       \
  136                                                                         \
  137         CPU_FOREACH(_i) {                                               \
  138                 bzero(DPCPU_ID_PTR(_i, n), sizeof(*DPCPU_PTR(n)));      \
  139         }                                                               \
  140 } while(0)
  141 
  142 #endif /* _KERNEL */
  143 
  144 /*
  145  * This structure maps out the global data that needs to be kept on a
  146  * per-cpu basis.  The members are accessed via the PCPU_GET/SET/PTR
  147  * macros defined in <machine/pcpu.h>.  Machine dependent fields are
  148  * defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
  149  */
  150 struct pcpu {
  151         struct thread   *pc_curthread;          /* Current thread */
  152         struct thread   *pc_idlethread;         /* Idle thread */
  153         struct thread   *pc_fpcurthread;        /* Fp state owner */
  154         struct thread   *pc_deadthread;         /* Zombie thread or NULL */
  155         struct pcb      *pc_curpcb;             /* Current pcb */
  156         uint64_t        pc_switchtime;          /* cpu_ticks() at last csw */
  157         int             pc_switchticks;         /* `ticks' at last csw */
  158         u_int           pc_cpuid;               /* This cpu number */
  159         STAILQ_ENTRY(pcpu) pc_allcpu;
  160         struct lock_list_entry *pc_spinlocks;
  161         struct vmmeter  pc_cnt;                 /* VM stats counters */
  162         long            pc_cp_time[CPUSTATES];  /* statclock ticks */
  163         struct device   *pc_device;
  164         void            *pc_netisr;             /* netisr SWI cookie */
  165         int             pc_unused1;             /* unused field */
  166         int             pc_domain;              /* Memory domain. */
  167         struct rm_queue pc_rm_queue;            /* rmlock list of trackers */
  168         uintptr_t       pc_dynamic;             /* Dynamic per-cpu data area */
  169 
  170         /*
  171          * Keep MD fields last, so that CPU-specific variations on a
  172          * single architecture don't result in offset variations of
  173          * the machine-independent fields of the pcpu.  Even though
  174          * the pcpu structure is private to the kernel, some ports
  175          * (e.g., lsof, part of gtop) define _KERNEL and include this
  176          * header.  While strictly speaking this is wrong, there's no
  177          * reason not to keep the offsets of the MI fields constant
  178          * if only to make kernel debugging easier.
  179          */
  180         PCPU_MD_FIELDS;
  181 } __aligned(CACHE_LINE_SIZE);
  182 
  183 #ifdef CTASSERT
  184 /*
  185  * To minimize memory waste in per-cpu UMA zones, size of struct pcpu
  186  * should be denominator of PAGE_SIZE.
  187  */
  188 CTASSERT((PAGE_SIZE / sizeof(struct pcpu)) * sizeof(struct pcpu) == PAGE_SIZE);
  189 #endif
  190 
  191 #ifdef _KERNEL
  192 
  193 STAILQ_HEAD(cpuhead, pcpu);
  194 
  195 extern struct cpuhead cpuhead;
  196 extern struct pcpu *cpuid_to_pcpu[];
  197 
  198 #define curcpu          PCPU_GET(cpuid)
  199 #define curproc         (curthread->td_proc)
  200 #ifndef curthread
  201 #define curthread       PCPU_GET(curthread)
  202 #endif
  203 #define curvidata       PCPU_GET(vidata)
  204 
  205 /* Accessor to elements allocated via UMA_ZONE_PCPU zone. */
  206 static inline void *
  207 zpcpu_get(void *base)
  208 {
  209 
  210         return ((char *)(base) + sizeof(struct pcpu) * curcpu);
  211 }
  212 
  213 static inline void *
  214 zpcpu_get_cpu(void *base, int cpu)
  215 {
  216 
  217         return ((char *)(base) + sizeof(struct pcpu) * cpu);
  218 }
  219 
  220 /*
  221  * Machine dependent callouts.  cpu_pcpu_init() is responsible for
  222  * initializing machine dependent fields of struct pcpu, and
  223  * db_show_mdpcpu() is responsible for handling machine dependent
  224  * fields for the DDB 'show pcpu' command.
  225  */
  226 void    cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
  227 void    db_show_mdpcpu(struct pcpu *pcpu);
  228 
  229 void    *dpcpu_alloc(int size);
  230 void    dpcpu_copy(void *s, int size);
  231 void    dpcpu_free(void *s, int size);
  232 void    dpcpu_init(void *dpcpu, int cpuid);
  233 void    pcpu_destroy(struct pcpu *pcpu);
  234 struct  pcpu *pcpu_find(u_int cpuid);
  235 void    pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
  236 
  237 #endif /* _KERNEL */
  238 
  239 #endif /* !_SYS_PCPU_H_ */

Cache object: a4912b35e8ddc8b3ada150f25822f985


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.