1 /* 2 * Copyright (c) 2001 Wind River Systems, Inc. 3 * All rights reserved. 4 * Written by: John Baldwin <jhb@FreeBSD.org> 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 * 4. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 /* 34 * This module provides MI support for per-cpu data. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/pcpu.h> 40 41 static struct globaldata *cpuid_to_globaldata[MAXCPU]; 42 struct cpuhead cpuhead = SLIST_HEAD_INITIALIZER(cpuhead); 43 44 /* 45 * Register a struct globaldata. 46 */ 47 void 48 globaldata_register(struct globaldata *globaldata) 49 { 50 51 KASSERT(globaldata->gd_cpuid >= 0 && globaldata->gd_cpuid < MAXCPU, 52 ("globaldata_register: invalid cpuid")); 53 cpuid_to_globaldata[globaldata->gd_cpuid] = globaldata; 54 SLIST_INSERT_HEAD(&cpuhead, globaldata, gd_allcpu); 55 } 56 57 /* 58 * Locate a struct globaldata by cpu id. 59 */ 60 struct globaldata * 61 globaldata_find(u_int cpuid) 62 { 63 64 return (cpuid_to_globaldata[cpuid]); 65 } 66