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 1.33 2004/10/26 04:33:10 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 88 /* 89 * This structure maps out the global data that needs to be kept on a 90 * per-cpu basis. genassym uses this to generate offsets for the assembler 91 * code. The machine-dependant portions of this file can be found in 92 * <machine/globaldata.h>, but only MD code should retrieve it. 93 * 94 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 95 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 96 * The reason for doing it via a struct is so that an array of pointers 97 * to each CPU's data can be set up for things like "check curproc on all 98 * other processors" 99 * 100 * NOTE! this structure needs to remain compatible between module accessors 101 * and the kernel, so we can't throw in lots of #ifdef's. 102 * 103 * gd_reqflags serves serveral purposes, but it is primarily an interrupt 104 * rollup flag used by the task switcher and spl mechanisms to decide that 105 * further checks are necessary. Interrupts are typically managed on a 106 * per-processor basis at least until you leave a critical section, but 107 * may then be scheduled to other cpus. 108 * 109 * gd_vme_avail and gd_vme_base cache free vm_map_entry structures for use 110 * in various vm_map related operations. gd_vme_avail is *NOT* a count of 111 * the number of structures in the cache but is instead a count of the number 112 * of unreserved structures in the cache. See vm_map_entry_reserve(). 113 * 114 * gd_uschedcp is internal to the userland scheduler. It does not represent 115 * the currently running process. 116 */ 117 118 struct sysmsg; 119 struct privatespace; 120 struct vm_map_entry; 121 struct pipe; 122 123 struct globaldata { 124 struct privatespace *gd_prvspace; /* self-reference */ 125 struct thread *gd_curthread; 126 int gd_tdfreecount; /* new thread cache */ 127 __uint32_t gd_reqflags; /* (see note above) */ 128 union sysunion *gd_freesysun; /* free syscall messages */ 129 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */ 130 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */ 131 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */ 132 __uint32_t gd_runqmask; /* which queues? */ 133 __uint32_t gd_cpuid; 134 cpumask_t gd_cpumask; /* mask = 1<<cpuid */ 135 cpumask_t gd_other_cpus; /* mask of 'other' cpus */ 136 struct timeval gd_stattv; 137 int gd_intr_nesting_level; /* (for interrupts) */ 138 struct vmmeter gd_cnt; 139 struct lwkt_ipiq *gd_ipiq; /* array[ncpu] of ipiq's */ 140 struct lwkt_ipiq gd_cpusyncq; /* ipiq for cpu synchro */ 141 short gd_upri; /* userland scheduler helper */ 142 short gd_unused01; 143 struct thread gd_schedthread; /* userland scheduler helper */ 144 struct thread gd_idlethread; 145 SLGlobalData gd_slab; /* slab allocator */ 146 int gd_unused02; 147 int gd_vme_avail; /* vm_map_entry reservation */ 148 struct vm_map_entry *gd_vme_base; /* vm_map_entry reservation */ 149 struct systimerq gd_systimerq; /* per-cpu system timers */ 150 int gd_syst_nest; 151 sysclock_t gd_nextclock; /* next best-case clock req */ 152 struct systimer gd_hardclock; /* scheduler periodic */ 153 struct systimer gd_statclock; /* statistics periodic */ 154 struct systimer gd_schedclock; /* scheduler periodic */ 155 volatile __uint32_t gd_time_seconds; /* uptime in seconds */ 156 volatile sysclock_t gd_cpuclock_base; /* cpuclock relative base */ 157 158 struct pipe *gd_pipeq; /* cache pipe structures */ 159 struct nchstats *gd_nchstats; /* namecache effectiveness */ 160 int gd_pipeqcount; /* number of structures */ 161 lwkt_tokref_t gd_tokreqbase; /* requests from other cpus */ 162 struct proc *gd_uschedcp; /* userland scheduler */ 163 /* extended by <machine/globaldata.h> */ 164 }; 165 166 typedef struct globaldata *globaldata_t; 167 168 #define RQB_IPIQ 0 169 #define RQB_INTPEND 1 170 #define RQB_AST_OWEUPC 2 171 #define RQB_AST_SIGNAL 3 172 #define RQB_AST_USER_RESCHED 4 173 #define RQB_AST_LWKT_RESCHED 5 174 #define RQB_AST_UPCALL 6 175 176 #define RQF_IPIQ (1 << RQB_IPIQ) 177 #define RQF_INTPEND (1 << RQB_INTPEND) 178 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC) 179 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL) 180 #define RQF_AST_USER_RESCHED (1 << RQB_AST_USER_RESCHED) 181 #define RQF_AST_LWKT_RESCHED (1 << RQB_AST_LWKT_RESCHED) 182 #define RQF_AST_UPCALL (1 << RQB_AST_UPCALL) 183 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|\ 184 RQF_AST_USER_RESCHED|RQF_AST_LWKT_RESCHED|\ 185 RQF_AST_UPCALL) 186 #define RQF_IDLECHECK_MASK (RQF_IPIQ|RQF_INTPEND) 187 188 #endif 189 190 #ifdef _KERNEL 191 struct globaldata *globaldata_find(int cpu); 192 #endif 193 194 #endif 195