4 * Copyright (c) 2003,2004 The DragonFly Project. All rights reserved.
6 * This code is derived from software contributed to The DragonFly Project
7 * by Matthew Dillon <dillon@backplane.com>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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
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.
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
36 * $DragonFly: src/sys/sys/systimer.h,v 1.13 2007/04/30 06:57:36 dillon Exp $
39 #ifndef _SYS_SYSTIMER_H_
40 #define _SYS_SYSTIMER_H_
43 #include <sys/types.h>
46 #include <sys/queue.h>
51 typedef __uint32_t sysclock_t
;
52 typedef TAILQ_HEAD(systimerq
, systimer
) *systimerq_t
;
53 typedef void (*systimer_func_t
)(struct systimer
*info
);
54 typedef void (*systimer_func2_t
)(struct systimer
*info
, struct intrframe
*frame
);
56 typedef struct systimer
{
57 TAILQ_ENTRY(systimer
) node
;
59 sysclock_t time
; /* absolute time next intr */
60 sysclock_t periodic
; /* if non-zero */
61 systimer_func2_t func
;
64 int freq
; /* frequency if periodic */
65 struct cputimer
*which
; /* which timer was used? */
66 struct globaldata
*gd
; /* cpu owning structure */
69 #define SYSTF_ONQUEUE 0x0001
70 #define SYSTF_IPIRUNNING 0x0002
71 #define SYSTF_NONQUEUED 0x0004
73 void systimer_intr(sysclock_t
*, int, struct intrframe
*);
74 void systimer_add(systimer_t
);
75 void systimer_del(systimer_t
);
76 void systimer_init_periodic(systimer_t
, void *, void *, int);
77 void systimer_init_periodic_nq(systimer_t
, void *, void *, int);
78 void systimer_adjust_periodic(systimer_t
, int);
79 void systimer_init_oneshot(systimer_t
, void *, void *, int);
80 void systimer_changed(void);
83 * cputimer interface. This provides a free-running (non-interrupt)
84 * timebase for the system. The cputimer
86 * These variables hold the fixed cputimer frequency, determining the
87 * granularity of cputimer_count().
89 * The 64 bit versions are used for converting count values into uS or nS
92 * usec = (cputimer_freq64_usec * count) >> 32
96 SLIST_ENTRY(cputimer
) next
;
100 sysclock_t (*count
)(void);
101 sysclock_t (*fromhz
)(int freq
);
102 sysclock_t (*fromus
)(int us
);
103 void (*construct
)(struct cputimer
*cputimer
, sysclock_t oldclock
);
104 void (*destruct
)(struct cputimer
*cputimer
);
105 sysclock_t freq
; /* in Hz */
106 int64_t freq64_usec
; /* in (1e6 << 32) / timer_freq */
107 int64_t freq64_nsec
; /* in (1e9 << 32) / timer_freq */
108 sysclock_t base
; /* (implementation dependant) */
111 extern struct cputimer
*sys_cputimer
;
113 #define CPUTIMER_DUMMY 0
114 #define CPUTIMER_8254_SEL1 1
115 #define CPUTIMER_8254_SEL2 2
116 #define CPUTIMER_ACPI 3
117 #define CPUTIMER_VKERNEL 4
119 #define CPUTIMER_PRI_DUMMY -10
120 #define CPUTIMER_PRI_8254 0
121 #define CPUTIMER_PRI_ACPI 10
122 #define CPUTIMER_PRI_VKERNEL 20
125 * note that cputimer_count() always returns a full-width wrapping counter.
127 void cputimer_select(struct cputimer
*, int);
128 void cputimer_register(struct cputimer
*);
129 void cputimer_deregister(struct cputimer
*);
130 void cputimer_set_frequency(struct cputimer
*, int);
131 sysclock_t
cputimer_default_fromhz(int);
132 sysclock_t
cputimer_default_fromus(int);
133 void cputimer_default_construct(struct cputimer
*, sysclock_t
);
134 void cputimer_default_destruct(struct cputimer
*);
136 void cputimer_intr_config(struct cputimer
*);
137 void cputimer_intr_reload(sysclock_t
);