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