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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/types.h> 28 #include <sys/param.h> 29 #include <sys/thread.h> 30 #include <sys/cpuvar.h> 31 #include <sys/machsystm.h> 32 #include <sys/systm.h> 33 #include <sys/promif.h> 34 #include <sys/xc_levels.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 if (panicstr) 50 return; 51 /* 52 * We don't need to receive an ACK from the CPU being poked, 53 * so just send out a directed interrupt. 54 */ 55 send_dirint(cpun, XC_CPUPOKE_PIL); 56 } 57