sys/sys/globaldata.h

   1 /*
   2  * Copyright (c) 2003,2004 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * Copyright (c) Peter Wemm <peter@netplex.com.au> All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $
  58  * $DragonFly: src/sys/sys/globaldata.h,v 1.49 2008/06/02 16:54:20 dillon Exp $
  59  */
  60
  61 #ifndef _SYS_GLOBALDATA_H_
  62 #define _SYS_GLOBALDATA_H_
  63
  64 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  65
  66 #ifndef _SYS_STDINT_H_
  67 #include <sys/stdint.h> /* __int types */
  68 #endif
  69 #ifndef _SYS_TIME_H_
  70 #include <sys/time.h>   /* struct timeval */
  71 #endif
  72 #ifndef _SYS_VMMETER_H_
  73 #include <sys/vmmeter.h> /* struct vmmeter */
  74 #endif
  75 #ifndef _SYS_THREAD_H_
  76 #include <sys/thread.h> /* struct thread */
  77 #endif
  78 #ifndef _SYS_SLABALLOC_H_
  79 #include <sys/slaballoc.h> /* SLGlobalData */
  80 #endif
  81 #ifndef _SYS_SYSTIMER_H_
  82 #include <sys/systimer.h> /* fine-grained system timers */
  83 #endif
  84 #ifndef _SYS_NCHSTATS_H_
  85 #include <sys/nchstats.h>
  86 #endif
  87 #ifndef _SYS_SYSID_H_
  88 #include <sys/sysid.h>    /* sysid_t */
  89 #endif
  90
  91 /*
  92  * This structure maps out the global data that needs to be kept on a
  93  * per-cpu basis.  genassym uses this to generate offsets for the assembler
  94  * code.  The machine-dependant portions of this file can be found in
  95  * <machine/globaldata.h>, but only MD code should retrieve it.
  96  *
  97  * The SMP parts are setup in pmap.c and locore.s for the BSP, and
  98  * mp_machdep.c sets up the data for the AP's to "see" when they awake.
  99  * The reason for doing it via a struct is so that an array of pointers
 100  * to each CPU's data can be set up for things like "check curproc on all
 101  * other processors"
 102  *
 103  * NOTE! this structure needs to remain compatible between module accessors
 104  * and the kernel, so we can't throw in lots of #ifdef's.
 105  *
 106  * gd_reqflags serves serveral purposes, but it is primarily an interrupt
 107  * rollup flag used by the task switcher and spl mechanisms to decide that
 108  * further checks are necessary.  Interrupts are typically managed on a
 109  * per-processor basis at least until you leave a critical section, but
 110  * may then be scheduled to other cpus.
 111  *
 112  * gd_vme_avail and gd_vme_base cache free vm_map_entry structures for use
 113  * in various vm_map related operations.  gd_vme_avail is *NOT* a count of
 114  * the number of structures in the cache but is instead a count of the number
 115  * of unreserved structures in the cache.  See vm_map_entry_reserve().
 116  */
 117
 118 struct sysmsg;
 119 struct tslpentry;
 120 struct privatespace;
 121 struct vm_map_entry;
 122 struct spinlock;
 123 struct pipe;
 124
 125 struct globaldata {
 126         struct privatespace *gd_prvspace;       /* self-reference */
 127         struct thread   *gd_curthread;
 128         struct thread   *gd_freetd;             /* cache one free td */
 129         __uint32_t      gd_reqflags;            /* (see note above) */
 130         void            *gd_unused00B;
 131         lwkt_queue      gd_tdallq;              /* all threads */
 132         lwkt_queue      gd_unused00C;
 133         lwkt_queue      gd_tdrunq[32];          /* runnable threads */
 134         __uint32_t      gd_runqmask;            /* which queues? */
 135         __uint32_t      gd_cpuid;
 136         cpumask_t       gd_cpumask;             /* mask = 1<<cpuid */
 137         cpumask_t       gd_other_cpus;          /* mask of 'other' cpus */
 138         struct timeval  gd_stattv;
 139         int             gd_intr_nesting_level;  /* (for interrupts) */
 140         struct vmmeter  gd_cnt;
 141         struct lwkt_ipiq *gd_ipiq;              /* array[ncpu] of ipiq's */
 142         struct lwkt_ipiq gd_cpusyncq;           /* ipiq for cpu synchro */
 143         short           gd_unused01;
 144         short           gd_unused02;
 145         struct thread   gd_unused02B;
 146         struct thread   gd_idlethread;
 147         SLGlobalData    gd_slab;                /* slab allocator */
 148         int             gd_trap_nesting_level;  /* track traps */
 149         int             gd_vme_avail;           /* vm_map_entry reservation */
 150         struct vm_map_entry *gd_vme_base;       /* vm_map_entry reservation */
 151         struct systimerq gd_systimerq;          /* per-cpu system timers */
 152         int             gd_syst_nest;
 153         sysclock_t      gd_unused03;
 154         struct systimer gd_hardclock;           /* scheduler periodic */
 155         struct systimer gd_statclock;           /* statistics periodic */
 156         struct systimer gd_schedclock;          /* scheduler periodic */
 157         volatile __uint32_t gd_time_seconds;    /* uptime in seconds */
 158         volatile sysclock_t gd_cpuclock_base;   /* cpuclock relative base */
 159
 160         struct pipe     *gd_pipeq;              /* cache pipe structures */
 161         struct nchstats *gd_nchstats;           /* namecache effectiveness */
 162         int             gd_pipeqcount;          /* number of structures */
 163         sysid_t         gd_sysid_alloc;         /* allocate unique sysid */
 164
 165         struct tslpque  *gd_tsleep_hash;        /* tsleep/wakeup support */
 166         struct spinlock *gd_spinlock_rd;        /* Shared spinlock held */
 167         int             gd_spinlocks_wr;        /* Exclusive spinlocks held */
 168         struct systimer *gd_systimer_inprog;    /* in-progress systimer */
 169         void            *gd_reserved[12];       /* future fields */
 170         /* extended by <machine/globaldata.h> */
 171 };
 172
 173 typedef struct globaldata *globaldata_t;
 174
 175 #define RQB_IPIQ                0
 176 #define RQB_INTPEND             1
 177 #define RQB_AST_OWEUPC          2
 178 #define RQB_AST_SIGNAL          3
 179 #define RQB_AST_USER_RESCHED    4
 180 #define RQB_AST_LWKT_RESCHED    5
 181 #define RQB_AST_UPCALL          6
 182
 183 #define RQF_IPIQ                (1 << RQB_IPIQ)
 184 #define RQF_INTPEND             (1 << RQB_INTPEND)
 185 #define RQF_AST_OWEUPC          (1 << RQB_AST_OWEUPC)
 186 #define RQF_AST_SIGNAL          (1 << RQB_AST_SIGNAL)
 187 #define RQF_AST_USER_RESCHED    (1 << RQB_AST_USER_RESCHED)
 188 #define RQF_AST_LWKT_RESCHED    (1 << RQB_AST_LWKT_RESCHED)
 189 #define RQF_AST_UPCALL          (1 << RQB_AST_UPCALL)
 190 #define RQF_AST_MASK            (RQF_AST_OWEUPC|RQF_AST_SIGNAL|\
 191                                 RQF_AST_USER_RESCHED|RQF_AST_LWKT_RESCHED|\
 192                                 RQF_AST_UPCALL)
 193 #define RQF_IDLECHECK_MASK      (RQF_IPIQ|RQF_INTPEND)
 194
 195 #endif
 196
 197 #ifdef _KERNEL
 198 struct globaldata *globaldata_find(int cpu);
 199 int is_globaldata_space(vm_offset_t saddr, vm_offset_t eaddr);
 200 #endif
 201
 202 #endif