xref: /illumos-gate/usr/src/uts/sun4u/sys/machclock.h (revision 7c478bd9)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #ifndef _SYS_MACHCLOCK_H
28 #define	_SYS_MACHCLOCK_H
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 #ifdef	__cplusplus
33 extern "C" {
34 #endif
35 
36 #ifdef _ASM
37 /*
38  * Macro to clear the NPT (non-privileged trap) bit in the %tick/%stick
39  * register.  Uses %g1-%g4.
40  */
41 #define	CLEARTICKNPT				\
42 	sethi	%hi(cpu_clearticknpt), %g1;	\
43 	jmp	%g1 + %lo(cpu_clearticknpt);	\
44 	rd	%pc, %g4
45 
46 #endif /* _ASM */
47 
48 #if defined(CPU_MODULE)
49 
50 /*
51  * Constants used to convert hi-res timestamps into nanoseconds
52  * (see <sys/clock.h> file for more information)
53  */
54 
55 #if defined(CHEETAH) || defined(HUMMINGBIRD)
56 
57 /*
58  * At least 3.9MHz, for slower %stick-based systems.
59  */
60 #define	NSEC_SHIFT	8
61 #define	VTRACE_SHIFT	8
62 
63 #elif defined(SPITFIRE)
64 
65 /*
66  * At least 62.5 MHz, for faster %tick-based systems.
67  */
68 #define	NSEC_SHIFT	4
69 #define	VTRACE_SHIFT	4
70 
71 #else
72 #error "Compiling for CPU_MODULE but no CPU specified"
73 #endif
74 
75 #endif /* CPU_MODULE */
76 
77 #ifndef _ASM
78 
79 #ifdef	_KERNEL
80 
81 /*
82  * Hardware watchdog variables and knobs
83  */
84 
85 #define	CLK_WATCHDOG_DEFAULT	10	/* 10 seconds */
86 
87 extern int	watchdog_enable;
88 extern int	watchdog_available;
89 extern int	watchdog_activated;
90 extern uint_t	watchdog_timeout_seconds;
91 
92 /*
93  * tod module name and operations
94  */
95 struct tod_ops {
96 	timestruc_t	(*tod_get)(void);
97 	void		(*tod_set)(timestruc_t);
98 	uint_t		(*tod_set_watchdog_timer)(uint_t);
99 	uint_t		(*tod_clear_watchdog_timer)(void);
100 	void		(*tod_set_power_alarm)(timestruc_t);
101 	void		(*tod_clear_power_alarm)(void);
102 	uint64_t	(*tod_get_cpufrequency)(void);
103 };
104 
105 extern struct tod_ops	tod_ops;
106 extern char		*tod_module_name;
107 
108 #endif	/* _KERNEL */
109 
110 #endif	/* _ASM */
111 
112 #ifdef	__cplusplus
113 }
114 #endif
115 
116 #endif	/* !_SYS_MACHCLOCK_H */
117