1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1990-1993, 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/param.h> 31 #include <sys/thread.h> 32 #include <sys/cpuvar.h> 33 #include <sys/machsystm.h> 34 #include <sys/systm.h> 35 36 /* 37 * Interrupt another CPU. 38 * This is useful to make the other CPU go through a trap so that 39 * it recognizes an address space trap (AST) for preempting a thread. 40 * 41 * It is possible to be preempted here and be resumed on the CPU 42 * being poked, so it isn't an error to poke the current CPU. 43 * We could check this and still get preempted after the check, so 44 * we don't bother. 45 */ 46 void 47 poke_cpu(int cpun) 48 { 49 /* 50 * We don't need to receive an ACK from the CPU being poked, 51 * so just send out a directed interrupt. 52 */ 53 if (!panicstr) 54 send_dirint(cpun, XC_CPUPOKE_PIL); 55 } 56