1 /*- 2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org> 3 * Copyright (c) Peter Wemm <peter@netplex.com.au> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef _MACHINE_GLOBALDATA_H_ 31 #define _MACHINE_GLOBALDATA_H_ 32 33 #ifdef _KERNEL 34 35 #include <sys/queue.h> 36 37 /* 38 * This structure maps out the global data that needs to be kept on a 39 * per-cpu basis. genassym uses this to generate offsets for the assembler 40 * code, which also provides external symbols so that C can get at them as 41 * though they were really globals. This structure is pointed to by 42 * the per-cpu system value (see alpha_pal_rdval() and alpha_pal_wrval()). 43 * Inside the kernel, the globally reserved register t7 is used to 44 * point at the globaldata structure. 45 */ 46 struct globaldata { 47 struct thread *gd_curthread; /* current thread */ 48 struct thread *gd_idlethread; /* idle thread */ 49 struct thread *gd_fpcurthread; /* fp state owner */ 50 struct pcb *gd_curpcb; /* current pcb */ 51 struct timeval gd_switchtime; 52 int gd_switchticks; 53 u_int gd_cpuid; /* this cpu number */ 54 u_int gd_other_cpus; /* all other cpus */ 55 int gd_inside_intr; 56 u_int32_t gd_next_asn; /* next ASN to allocate */ 57 u_int32_t gd_current_asngen; /* ASN rollover check */ 58 59 SLIST_ENTRY(globaldata) gd_allcpu; 60 struct lock_list_entry *gd_spinlocks; 61 #ifdef KTR_PERCPU 62 int gd_ktr_idx; /* Index into trace table */ 63 char *gd_ktr_buf; 64 char gd_ktr_buf_data[KTR_SIZE]; 65 #endif 66 }; 67 68 void globaldata_init(struct globaldata *pcpu, int cpuid, size_t sz); 69 70 #endif /* _KERNEL */ 71 72 #endif /* !_MACHINE_GLOBALDATA_H_ */ 73