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 1.14 2003/07/30 00:19:16 dillon Exp $ 28 */ 29 30 #ifndef _SYS_GLOBALDATA_H_ 31 #define _SYS_GLOBALDATA_H_ 32 33 #ifndef _SYS_TIME_H_ 34 #include <sys/time.h> /* struct timeval */ 35 #endif 36 #ifndef _SYS_VMMETER_H_ 37 #include <sys/vmmeter.h> /* struct vmmeter */ 38 #endif 39 #ifndef _SYS_THREAD_H_ 40 #include <sys/thread.h> /* struct thread */ 41 #endif 42 43 /* 44 * This structure maps out the global data that needs to be kept on a 45 * per-cpu basis. genassym uses this to generate offsets for the assembler 46 * code. The machine-dependant portions of this file can be found in 47 * <machine/globaldata.h>, but only MD code should retrieve it. 48 * 49 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 50 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 51 * The reason for doing it via a struct is so that an array of pointers 52 * to each CPU's data can be set up for things like "check curproc on all 53 * other processors" 54 * 55 * NOTE! this structure needs to remain compatible between module accessors 56 * and the kernel, so we can't throw in lots of #ifdef's. 57 * 58 * gd_reqflags serves serveral purposes, but it is primarily an interrupt 59 * rollup flag used by the task switcher and spl mechanisms to decide that 60 * further checks are necessary. Interrupts are typically managed on a 61 * per-processor basis at least until you leave a critical section, but 62 * may then be scheduled to other cpus. 63 */ 64 65 union sysmsg; 66 struct privatespace; 67 68 struct globaldata { 69 struct privatespace *gd_prvspace; /* self-reference */ 70 struct thread *gd_curthread; 71 int gd_tdfreecount; /* new thread cache */ 72 u_int32_t gd_reqflags; /* (see note above) */ 73 union sysmsg *gd_freesysmsg; /* free syscall messages */ 74 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */ 75 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */ 76 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */ 77 u_int32_t gd_runqmask; /* which queues? */ 78 u_int gd_cpuid; 79 u_int gd_other_cpus; /* mask of 'other' cpus */ 80 struct timeval gd_stattv; 81 int gd_intr_nesting_level; /* (for fast interrupts) */ 82 int gd_psticks; /* profile kern/kern_clock.c */ 83 int gd_psdiv; /* profile kern/kern_clock.c */ 84 struct vmmeter gd_cnt; 85 struct lwkt_ipiq *gd_ipiq; 86 struct thread gd_schedthread; 87 struct thread gd_idlethread; 88 /* extended by <machine/pcpu.h> */ 89 }; 90 91 typedef struct globaldata *globaldata_t; 92 93 #define RQB_IPIQ 0 94 #define RQB_INTPEND 1 95 #define RQB_AST_OWEUPC 2 96 #define RQB_AST_SIGNAL 3 97 #define RQB_AST_RESCHED 4 98 99 #define RQF_IPIQ (1 << RQB_IPIQ) 100 #define RQF_INTPEND (1 << RQB_INTPEND) 101 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC) 102 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL) 103 #define RQF_AST_RESCHED (1 << RQB_AST_RESCHED) 104 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|RQF_AST_RESCHED) 105 106 #ifdef _KERNEL 107 struct globaldata *globaldata_find(int cpu); 108 #endif 109 110 #endif 111