1 /* 2 * SYS/SYSTIMER.H 3 * 4 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved. 5 * 6 * This code is derived from software contributed to The DragonFly Project 7 * by Matthew Dillon <dillon@backplane.com> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 3. Neither the name of The DragonFly Project nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific, prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $DragonFly: src/sys/sys/systimer.h,v 1.9 2005/06/09 19:14:12 eirikn Exp $ 37 */ 38 39 #ifndef _SYS_SYSTIMER_H_ 40 #define _SYS_SYSTIMER_H_ 41 42 struct intrframe; 43 44 typedef __uint32_t sysclock_t; 45 typedef TAILQ_HEAD(systimerq, systimer) *systimerq_t; 46 typedef void (*systimer_func_t)(struct systimer *info); 47 typedef void (*systimer_func2_t)(struct systimer *info, struct intrframe *frame); 48 49 typedef struct systimer { 50 TAILQ_ENTRY(systimer) node; 51 systimerq_t queue; 52 sysclock_t time; /* absolute time next intr */ 53 sysclock_t periodic; /* if non-zero */ 54 systimer_func2_t func; 55 void *data; 56 int flags; 57 struct globaldata *gd; /* cpu owning structure */ 58 } *systimer_t; 59 60 #define SYSTF_ONQUEUE 0x0001 61 #define SYSTF_IPIRUNNING 0x0002 62 #define SYSTF_NONQUEUED 0x0004 63 64 void systimer_intr(sysclock_t *, struct intrframe *); 65 void systimer_add(systimer_t); 66 void systimer_del(systimer_t); 67 void systimer_init_periodic(systimer_t, void *, void *, int); 68 void systimer_init_periodic_nq(systimer_t, void *, void *, int); 69 void systimer_init_oneshot(systimer_t, void *, void *, int); 70 71 /* 72 * cputimer interface. This provides a free-running (non-interrupt) 73 * timebase for the system. The cputimer 74 * 75 * These variables hold the fixed cputimer frequency, determining the 76 * granularity of cputimer_count(). 77 * 78 * The 64 bit versions are used for converting count values into uS or nS 79 * as follows: 80 * 81 * usec = (cputimer_freq64_usec * count) >> 32 82 */ 83 84 struct cputimer { 85 SLIST_ENTRY(cputimer) next; 86 const char *name; 87 int pri; 88 int type; 89 sysclock_t (*count)(void); 90 sysclock_t (*fromhz)(int freq); 91 sysclock_t (*fromus)(int us); 92 void (*construct)(struct cputimer *cputimer, sysclock_t oldclock); 93 void (*destruct)(struct cputimer *cputimer); 94 sysclock_t freq; /* in Hz */ 95 int64_t freq64_usec; /* in (1e6 << 32) / timer_freq */ 96 int64_t freq64_nsec; /* in (1e9 << 32) / timer_freq */ 97 sysclock_t base; /* (implementation dependant) */ 98 }; 99 100 extern struct cputimer *sys_cputimer; 101 102 #define CPUTIMER_DUMMY 0 103 #define CPUTIMER_8254_SEL1 1 104 #define CPUTIMER_8254_SEL2 2 105 #define CPUTIMER_ACPI 3 106 107 #define CPUTIMER_PRI_DUMMY -10 108 #define CPUTIMER_PRI_8254 0 109 #define CPUTIMER_PRI_ACPI 10 110 111 /* 112 * note that cputimer_count() always returns a full-width wrapping counter. 113 */ 114 void cputimer_select(struct cputimer *, int); 115 void cputimer_register(struct cputimer *); 116 void cputimer_deregister(struct cputimer *); 117 void cputimer_set_frequency(struct cputimer *, int); 118 sysclock_t cputimer_default_fromhz(int); 119 sysclock_t cputimer_default_fromus(int); 120 void cputimer_default_construct(struct cputimer *, sysclock_t); 121 void cputimer_default_destruct(struct cputimer *); 122 123 void cputimer_intr_config(struct cputimer *); 124 void cputimer_intr_reload(sysclock_t); 125 126 #endif 127 128