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 1.21 2003/11/21 22:46:13 dillon 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 51 /* 52 * This structure maps out the global data that needs to be kept on a 53 * per-cpu basis. genassym uses this to generate offsets for the assembler 54 * code. The machine-dependant portions of this file can be found in 55 * <machine/globaldata.h>, but only MD code should retrieve it. 56 * 57 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 58 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 59 * The reason for doing it via a struct is so that an array of pointers 60 * to each CPU's data can be set up for things like "check curproc on all 61 * other processors" 62 * 63 * NOTE! this structure needs to remain compatible between module accessors 64 * and the kernel, so we can't throw in lots of #ifdef's. 65 * 66 * gd_reqflags serves serveral purposes, but it is primarily an interrupt 67 * rollup flag used by the task switcher and spl mechanisms to decide that 68 * further checks are necessary. Interrupts are typically managed on a 69 * per-processor basis at least until you leave a critical section, but 70 * may then be scheduled to other cpus. 71 * 72 * gd_vme_avail and gd_vme_base cache free vm_map_entry structures for use 73 * in various vm_map related operations. gd_vme_avail is *NOT* a count of 74 * the number of structures in the cache but is instead a count of the number 75 * of unreserved structures in the cache. See vm_map_entry_reserve(). 76 */ 77 78 struct sysmsg; 79 struct privatespace; 80 struct vm_map_entry; 81 82 struct globaldata { 83 struct privatespace *gd_prvspace; /* self-reference */ 84 struct thread *gd_curthread; 85 int gd_tdfreecount; /* new thread cache */ 86 __uint32_t gd_reqflags; /* (see note above) */ 87 union sysunion *gd_freesysun; /* free syscall messages */ 88 TAILQ_HEAD(,thread) gd_tdallq; /* all threads */ 89 TAILQ_HEAD(,thread) gd_tdfreeq; /* new thread cache */ 90 TAILQ_HEAD(,thread) gd_tdrunq[32]; /* runnable threads */ 91 __uint32_t gd_runqmask; /* which queues? */ 92 __uint32_t gd_cpuid; 93 __uint32_t gd_other_cpus; /* mask of 'other' cpus */ 94 struct timeval gd_stattv; 95 int gd_intr_nesting_level; /* (for interrupts) */ 96 int gd_psticks; /* profile kern/kern_clock.c */ 97 int gd_psdiv; /* profile kern/kern_clock.c */ 98 struct vmmeter gd_cnt; 99 struct lwkt_ipiq *gd_ipiq; 100 short gd_upri; /* userland scheduler helper */ 101 short gd_unused01; 102 struct thread gd_schedthread; /* userland scheduler helper */ 103 struct thread gd_idlethread; 104 SLGlobalData gd_slab; /* slab allocator */ 105 int gd_vme_kdeficit; /* vm_map_entry reservation */ 106 int gd_vme_avail; /* vm_map_entry reservation */ 107 struct vm_map_entry *gd_vme_base; /* vm_map_entry reservation */ 108 /* extended by <machine/pcpu.h> */ 109 }; 110 111 typedef struct globaldata *globaldata_t; 112 113 #define RQB_IPIQ 0 114 #define RQB_INTPEND 1 115 #define RQB_AST_OWEUPC 2 116 #define RQB_AST_SIGNAL 3 117 #define RQB_AST_RESCHED 4 118 #define RQB_AST_UPCALL 5 119 120 #define RQF_IPIQ (1 << RQB_IPIQ) 121 #define RQF_INTPEND (1 << RQB_INTPEND) 122 #define RQF_AST_OWEUPC (1 << RQB_AST_OWEUPC) 123 #define RQF_AST_SIGNAL (1 << RQB_AST_SIGNAL) 124 #define RQF_AST_RESCHED (1 << RQB_AST_RESCHED) 125 #define RQF_AST_UPCALL (1 << RQB_AST_UPCALL) 126 #define RQF_AST_MASK (RQF_AST_OWEUPC|RQF_AST_SIGNAL|RQF_AST_RESCHED|\ 127 RQF_AST_UPCALL) 128 129 #endif 130 131 #ifdef _KERNEL 132 struct globaldata *globaldata_find(int cpu); 133 #endif 134 135 #endif 136