1 /*- 2 * Copyright (c) Peter Wemm <peter@netplex.com.au> 3 * 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 * $FreeBSD$ 27 */ 28 29 #ifndef _MACHINE_GLOBALDATA_H_ 30 #define _MACHINE_GLOBALDATA_H_ 31 32 #ifdef _KERNEL 33 34 #include <machine/segments.h> 35 #include <machine/tss.h> 36 37 /* XXX */ 38 #ifdef KTR_PERCPU 39 #include <sys/ktr.h> 40 #endif 41 42 /* 43 * This structure maps out the global data that needs to be kept on a 44 * per-cpu basis. genassym uses this to generate offsets for the assembler 45 * code, which also provides external symbols so that C can get at them as 46 * though they were really globals. 47 * 48 * The SMP parts are setup in pmap.c and locore.s for the BSP, and 49 * mp_machdep.c sets up the data for the AP's to "see" when they awake. 50 * The reason for doing it via a struct is so that an array of pointers 51 * to each CPU's data can be set up for things like "check curproc on all 52 * other processors" 53 */ 54 struct globaldata { 55 struct globaldata *gd_prvspace; /* self-reference */ 56 struct thread *gd_curthread; 57 struct thread *gd_npxthread; 58 struct pcb *gd_curpcb; 59 struct thread *gd_idlethread; 60 struct timeval gd_switchtime; 61 struct i386tss gd_common_tss; 62 int gd_switchticks; 63 struct segment_descriptor gd_common_tssd; 64 struct segment_descriptor *gd_tss_gdt; 65 int gd_currentldt; 66 u_int gd_cpuid; 67 u_int gd_other_cpus; 68 SLIST_ENTRY(globaldata) gd_allcpu; 69 struct lock_list_entry *gd_spinlocks; 70 #ifdef KTR_PERCPU 71 volatile int gd_ktr_idx; /* Index into trace table */ 72 char *gd_ktr_buf; 73 char gd_ktr_buf_data[KTR_SIZE]; 74 #endif 75 }; 76 77 #endif /* _KERNEL */ 78 79 #endif /* ! _MACHINE_GLOBALDATA_H_ */ 80