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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * FILE NOTICE BEGIN 29 * 30 * This file should not be modified. If you wish to modify it or have it 31 * modified, please contact Sun Microsystems at <LFI149367@-sun-.-com-> 32 * (without anti-spam dashes) 33 * 34 * FILE NOTICE END 35 */ 36 37 #pragma ident "%Z%%M% %I% %E% SMI" 38 39 #include <sys/cpuvar.h> 40 #include <sys/stack.h> 41 #include <vm/seg_kp.h> 42 #include <sys/proc.h> 43 #include <sys/pset.h> 44 #include <sys/sysmacros.h> 45 46 /* 47 * Create and initialize an interrupt thread. 48 */ 49 static void 50 thread_create_intr(cpu_t *cp) 51 { 52 kthread_t *tp; 53 54 tp = thread_create(NULL, 0, 55 (void (*)())thread_create_intr, NULL, 0, &p0, TS_ONPROC, 0); 56 57 /* 58 * Set the thread in the TS_FREE state. The state will change 59 * to TS_ONPROC only while the interrupt is active. Think of these 60 * as being on a private free list for the CPU. Being TS_FREE keeps 61 * inactive interrupt threads out of debugger thread lists. 62 * 63 * We cannot call thread_create with TS_FREE because of the current 64 * checks there for ONPROC. Fix this when thread_create takes flags. 65 */ 66 THREAD_FREEINTR(tp, cp); 67 68 /* 69 * Nobody should ever reference the credentials of an interrupt 70 * thread so make it NULL to catch any such references. 71 */ 72 tp->t_cred = NULL; 73 tp->t_flag |= T_INTR_THREAD; 74 tp->t_cpu = cp; 75 tp->t_bound_cpu = cp; 76 tp->t_disp_queue = cp->cpu_disp; 77 tp->t_affinitycnt = 1; 78 tp->t_preempt = 1; 79 80 /* 81 * Don't make a user-requested binding on this thread so that 82 * the processor can be offlined. 83 */ 84 tp->t_bind_cpu = PBIND_NONE; /* no USER-requested binding */ 85 tp->t_bind_pset = PS_NONE; 86 87 #if defined(__i386) || defined(__amd64) 88 tp->t_stk -= STACK_ALIGN; 89 *(tp->t_stk) = 0; /* terminate intr thread stack */ 90 #endif 91 92 /* 93 * Link onto CPU's interrupt pool. 94 */ 95 tp->t_link = cp->cpu_intr_thread; 96 cp->cpu_intr_thread = tp; 97 } 98 99 /* 100 * Allocate a given number of interrupt threads for a given CPU. 101 * These threads will get freed by cpu_destroy_bound_threads() 102 * when CPU gets unconfigured. 103 */ 104 void 105 cpu_intr_alloc(cpu_t *cp, int n) 106 { 107 int i; 108 109 for (i = 0; i < n; i++) 110 thread_create_intr(cp); 111 112 cp->cpu_intr_stack = (caddr_t)segkp_get(segkp, INTR_STACK_SIZE, 113 KPD_HASREDZONE | KPD_NO_ANON | KPD_LOCKED) + 114 INTR_STACK_SIZE - SA(MINFRAME); 115 } 116