1 /* 2 * Copyright (c) 2003-2011 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 58 #ifndef _SYS_GLOBALDATA_H_ 59 #define _SYS_GLOBALDATA_H_ 60 61 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 62 63 #ifndef _SYS_STDINT_H_ 64 #include <sys/stdint.h> /* __int types */ 65 #endif 66 #ifndef _SYS_TIME_H_ 67 #include <sys/time.h> /* struct timeval */ 68 #endif 69 #ifndef _SYS_VMMETER_H_ 70 #include <sys/vmmeter.h> /* struct vmmeter */ 71 #endif 72 #ifndef _SYS_THREAD_H_ 73 #include <sys/thread.h> /* struct thread */ 74 #endif 75 #ifndef _SYS_SLABALLOC_H_ 76 #include <sys/slaballoc.h> /* SLGlobalData */ 77 #endif 78 #ifndef _SYS_SYSTIMER_H_ 79 #include <sys/systimer.h> /* fine-grained system timers */ 80 #endif 81 #ifndef _SYS_NCHSTATS_H_ 82 #include <sys/nchstats.h> 83 #endif 84 #ifndef _SYS_SYSID_H_ 85 #include <sys/sysid.h> /* sysid_t */ 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 */ 114 115 struct sysmsg; 116 struct tslpentry; 117 struct privatespace; 118 struct vm_map_entry; 119 struct spinlock; 120 struct pipe; 121 122 struct globaldata { 123 struct privatespace *gd_prvspace; /* self-reference */ 124 struct thread *gd_curthread; 125 struct thread *gd_freetd; /* cache one free td */ 126 __uint32_t gd_reqflags; /* (see note above) */ 127 long gd_flags; 128 lwkt_queue gd_tdallq; /* all threads */ 129 lwkt_queue gd_tdrunq; /* runnable threads */ 130 __uint32_t gd_cpuid; 131 cpumask_t gd_cpumask; /* mask = CPUMASK(cpuid) */ 132 cpumask_t gd_other_cpus; /* mask of 'other' cpus */ 133 struct timeval gd_stattv; 134 int gd_intr_nesting_level; /* hard code, intrs, ipis */ 135 struct vmmeter gd_cnt; 136 struct vmtotal gd_vmtotal; 137 cpumask_t gd_ipimask; /* pending ipis from cpus */ 138 struct lwkt_ipiq *gd_ipiq; /* array[ncpu] of ipiq's */ 139 struct lwkt_ipiq gd_cpusyncq; /* ipiq for cpu synchro */ 140 u_int gd_npoll; /* ipiq synchronization */ 141 int gd_tdrunqcount; 142 struct thread gd_unused02B; 143 struct thread gd_idlethread; 144 SLGlobalData gd_slab; /* slab allocator */ 145 int gd_trap_nesting_level; /* track traps */ 146 int gd_vme_avail; /* vm_map_entry reservation */ 147 struct vm_map_entry *gd_vme_base; /* vm_map_entry reservation */ 148 struct systimerq gd_systimerq; /* per-cpu system timers */ 149 int gd_syst_nest; 150 struct systimer gd_hardclock; /* scheduler periodic */ 151 struct systimer gd_statclock; /* statistics periodic */ 152 struct systimer gd_schedclock; /* scheduler periodic */ 153 volatile __uint32_t gd_time_seconds; /* uptime in seconds */ 154 volatile sysclock_t gd_cpuclock_base; /* cpuclock relative base */ 155 156 struct pipe *gd_pipeq; /* cache pipe structures */ 157 struct nchstats *gd_nchstats; /* namecache effectiveness */ 158 int gd_pipeqcount; /* number of structures */ 159 sysid_t gd_sysid_alloc; /* allocate unique sysid */ 160 161 struct tslpque *gd_tsleep_hash; /* tsleep/wakeup support */ 162 long gd_processing_ipiq; 163 int gd_spinlocks; /* Exclusive spinlocks held */ 164 struct systimer *gd_systimer_inprog; /* in-progress systimer */ 165 int gd_timer_running; 166 u_int gd_idle_repeat; /* repeated switches to idle */ 167 int gd_ireserved[7]; 168 const char *gd_infomsg; /* debugging */ 169 struct lwkt_tokref gd_handoff; /* hand-off tokref */ 170 void *gd_delayed_wakeup[2]; 171 void *gd_sample_pc; /* sample program ctr/tr */ 172 void *gd_preserved[5]; /* future fields */ 173 /* extended by <machine/globaldata.h> */ 174 }; 175 176 typedef struct globaldata *globaldata_t; 177 178 #define RQB_IPIQ 0 /* 0001 */ 179 #define RQB_INTPEND 1 /* 0002 */ 180 #define RQB_AST_OWEUPC 2 /* 0004 */ 181 #define RQB_AST_SIGNAL 3 /* 0008 */ 182 #define RQB_AST_USER_RESCHED 4 /* 0010 */ 183 #define RQB_AST_LWKT_RESCHED 5 /* 0020 */ 184 #define RQB_UNUSED6 6 /* 0040 */ 185 #define RQB_TIMER 7 /* 0080 */ 186 #define RQB_RUNNING 8 /* 0100 */ 187 #define RQB_SPINNING 9 /* 0200 */ 188 #define RQB_QUICKRET 10 /* 0400 */ 189 190 #define RQF_IPIQ (1 << RQB_IPIQ) 191 #define RQF_INTPEND (1 << RQB_INTPEND) 192 #define RQF_TIMER (1 << RQB_TIMER) 193 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC) 194 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL) 195 #define RQF_AST_USER_RESCHED (1 << RQB_AST_USER_RESCHED) 196 #define RQF_AST_LWKT_RESCHED (1 << RQB_AST_LWKT_RESCHED) 197 #define RQF_RUNNING (1 << RQB_RUNNING) 198 #define RQF_SPINNING (1 << RQB_SPINNING) 199 #define RQF_QUICKRET (1 << RQB_QUICKRET) 200 201 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|\ 202 RQF_AST_USER_RESCHED|RQF_AST_LWKT_RESCHED) 203 #define RQF_IDLECHECK_MASK (RQF_IPIQ|RQF_INTPEND|RQF_TIMER) 204 #define RQF_IDLECHECK_WK_MASK (RQF_IDLECHECK_MASK|RQF_AST_LWKT_RESCHED) 205 206 /* 207 * globaldata flags 208 */ 209 #define GDF_KPRINTF 0x0001 /* kprintf() reentrancy */ 210 211 #endif 212 213 /* 214 * MANUAL DEBUG CODE FOR DEBUGGING LOCKUPS 215 */ 216 #ifdef _KERNEL 217 218 #if 0 219 220 #define DEBUG_PUSH_INFO(msg) \ 221 const char *save_infomsg; \ 222 save_infomsg = mycpu->gd_infomsg; \ 223 mycpu->gd_infomsg = msg \ 224 225 #define DEBUG_POP_INFO() mycpu->gd_infomsg = save_infomsg 226 227 #else 228 229 #define DEBUG_PUSH_INFO(msg) 230 #define DEBUG_POP_INFO() 231 232 #endif 233 234 #endif 235 236 #ifdef _KERNEL 237 struct globaldata *globaldata_find(int cpu); 238 int is_globaldata_space(vm_offset_t saddr, vm_offset_t eaddr); 239 #endif 240 241 #endif 242