1 /*- 2 * Copyright (c) Peter Wemm <peter@netplex.com.au> All rights reserved. 3 * Copyright (c) 2003 Matthew Dillon <dillon@backplane.net> 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: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $ 27 * $DragonFly: src/sys/sys/globaldata.h,v 1.28 2004/03/02 06:06:44 hmp Exp $ 28 */ 29 30 #ifndef _SYS_GLOBALDATA_H_ 31 #define _SYS_GLOBALDATA_H_ 32 33 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 34 35 #ifndef _SYS_STDINT_H_ 36 #include <sys/stdint.h> /* __int types */ 37 #endif 38 #ifndef _SYS_TIME_H_ 39 #include <sys/time.h> /* struct timeval */ 40 #endif 41 #ifndef _SYS_VMMETER_H_ 42 #include <sys/vmmeter.h> /* struct vmmeter */ 43 #endif 44 #ifndef _SYS_THREAD_H_ 45 #include <sys/thread.h> /* struct thread */ 46 #endif 47 #ifndef _SYS_SLABALLOC_H_ 48 #include <sys/slaballoc.h> /* SLGlobalData */ 49 #endif 50 #ifndef _SYS_SYSTIMER_H_ 51 #include <sys/systimer.h> /* fine-grained system timers */ 52 #endif 53 54 /* 55 * This structure maps out the global data that needs to be kept on a 56 * per-cpu basis. genassym uses this to generate offsets for the assembler 57 * code. The machine-dependant portions of this file can be found in 58 * <machine/globaldata.h>, but only MD code should retrieve it. 59 * 60 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 61 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 62 * The reason for doing it via a struct is so that an array of pointers 63 * to each CPU's data can be set up for things like "check curproc on all 64 * other processors" 65 * 66 * NOTE! this structure needs to remain compatible between module accessors 67 * and the kernel, so we can't throw in lots of #ifdef's. 68 * 69 * gd_reqflags serves serveral purposes, but it is primarily an interrupt 70 * rollup flag used by the task switcher and spl mechanisms to decide that 71 * further checks are necessary. Interrupts are typically managed on a 72 * per-processor basis at least until you leave a critical section, but 73 * may then be scheduled to other cpus. 74 * 75 * gd_vme_avail and gd_vme_base cache free vm_map_entry structures for use 76 * in various vm_map related operations. gd_vme_avail is *NOT* a count of 77 * the number of structures in the cache but is instead a count of the number 78 * of unreserved structures in the cache. See vm_map_entry_reserve(). 79 */ 80 81 struct sysmsg; 82 struct privatespace; 83 struct vm_map_entry; 84 struct pipe; 85 86 struct globaldata { 87 struct privatespace *gd_prvspace; /* self-reference */ 88 struct thread *gd_curthread; 89 int gd_tdfreecount; /* new thread cache */ 90 __uint32_t gd_reqflags; /* (see note above) */ 91 union sysunion *gd_freesysun; /* free syscall messages */ 92 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */ 93 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */ 94 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */ 95 __uint32_t gd_runqmask; /* which queues? */ 96 __uint32_t gd_cpuid; 97 cpumask_t gd_other_cpus; /* mask of 'other' cpus */ 98 struct timeval gd_stattv; 99 int gd_intr_nesting_level; /* (for interrupts) */ 100 struct vmmeter gd_cnt; 101 struct lwkt_ipiq *gd_ipiq; /* array[ncpu] of ipiq's */ 102 struct lwkt_ipiq gd_cpusyncq; /* ipiq for cpu synchro */ 103 short gd_upri; /* userland scheduler helper */ 104 short gd_unused01; 105 struct thread gd_schedthread; /* userland scheduler helper */ 106 struct thread gd_idlethread; 107 SLGlobalData gd_slab; /* slab allocator */ 108 int gd_vme_kdeficit; /* vm_map_entry reservation */ 109 int gd_vme_avail; /* vm_map_entry reservation */ 110 struct vm_map_entry *gd_vme_base; /* vm_map_entry reservation */ 111 struct systimerq gd_systimerq; /* per-cpu system timers */ 112 int gd_syst_nest; 113 sysclock_t gd_nextclock; /* next best-case clock req */ 114 struct systimer gd_hardclock; /* scheduler periodic */ 115 struct systimer gd_statclock; /* statistics periodic */ 116 struct systimer gd_schedclock; /* scheduler periodic */ 117 volatile __uint32_t gd_time_seconds; /* uptime in seconds */ 118 volatile sysclock_t gd_cpuclock_base; /* cpuclock relative base */ 119 120 struct pipe *gd_pipeq; /* cache pipe structures */ 121 int gd_pipeqcount; /* number of structures */ 122 lwkt_tokref_t gd_tokreqbase; /* requests from other cpus */ 123 /* extended by <machine/globaldata.h> */ 124 }; 125 126 typedef struct globaldata *globaldata_t; 127 128 #define RQB_IPIQ 0 129 #define RQB_INTPEND 1 130 #define RQB_AST_OWEUPC 2 131 #define RQB_AST_SIGNAL 3 132 #define RQB_AST_RESCHED 4 133 #define RQB_AST_UPCALL 5 134 135 #define RQF_IPIQ (1 << RQB_IPIQ) 136 #define RQF_INTPEND (1 << RQB_INTPEND) 137 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC) 138 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL) 139 #define RQF_AST_RESCHED (1 << RQB_AST_RESCHED) 140 #define RQF_AST_UPCALL (1 << RQB_AST_UPCALL) 141 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|RQF_AST_RESCHED|\ 142 RQF_AST_UPCALL) 143 #define RQF_IDLECHECK_MASK (RQF_IPIQ|RQF_INTPEND) 144 145 #endif 146 147 #ifdef _KERNEL 148 struct globaldata *globaldata_find(int cpu); 149 #endif 150 151 #endif 152