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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_CLOCK_TICK_H 28 #define _SYS_CLOCK_TICK_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/types.h> 33 #include <sys/mutex.h> 34 #include <sys/cpuvar.h> 35 #include <sys/systm.h> 36 #include <sys/cyclic.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 #define CLOCK_TICK_NCPUS 32 43 44 /* 45 * Per-CPU structure to facilitate multi-threaded tick accounting. 46 * 47 * ct_lock 48 * Mutex for the structure. Used to lock the structure to pass 49 * arguments to the tick processing softint handler. 50 * ct_intr 51 * Tick processing softint handle. For parallelism, each CPU 52 * needs to have its own softint handle. 53 * ct_lbolt 54 * Copy of the lbolt at the time of tick scheduling. 55 * ct_pending 56 * Number of ticks to be processed by one invocation of the tick 57 * processing softint. 58 * ct_start 59 * First CPU to do tick processing for. 60 * ct_end 61 * Last CPU to do tick processing for. 62 * ct_scan 63 * CPU to start the tick processing from. Rotated every tick. 64 */ 65 typedef struct clock_tick_cpu { 66 kmutex_t ct_lock; 67 ulong_t ct_intr; 68 clock_t ct_lbolt; 69 int ct_pending; 70 int ct_start; 71 int ct_end; 72 int ct_scan; 73 } clock_tick_cpu_t; 74 75 /* 76 * Per-set structure to facilitate multi-threaded tick accounting. 77 * clock_tick_lock protects this. 78 * 79 * ct_start 80 * First CPU to do tick processing for. 81 * ct_end 82 * Last CPU to do tick processing for. 83 * ct_scan 84 * CPU to start the tick processing from. Rotated every tick. 85 */ 86 typedef struct clock_tick_set { 87 int ct_start; 88 int ct_end; 89 int ct_scan; 90 } clock_tick_set_t; 91 92 #define CLOCK_TICK_CPU_OFFLINE(cp) \ 93 (((cp) != cpu_active) && ((cp)->cpu_next_onln == (cp))) 94 95 #define CLOCK_TICK_XCALL_SAFE(cp) \ 96 CPU_IN_SET(clock_tick_online_cpuset, cp->cpu_id) 97 98 #define CLOCK_TICK_PROC_MAX 10 99 100 #ifdef _KERNEL 101 #pragma weak create_softint 102 extern ulong_t create_softint(uint_t, uint_t (*)(caddr_t, caddr_t), 103 caddr_t); 104 #pragma weak invoke_softint 105 extern void invoke_softint(processorid_t, ulong_t); 106 #pragma weak sync_softint 107 extern void sync_softint(cpuset_t); 108 extern void clock_tick(kthread_t *, int); 109 extern void membar_sync(void); 110 111 extern int hires_tick; 112 #endif /* _KERNEL */ 113 114 #ifdef __cplusplus 115 } 116 #endif 117 118 #endif /* _SYS_CLOCK_TICK_H */ 119