sun4u/sys/machclock.h

	machclock.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SYS_MACHCLOCK_H
#define _SYS_MACHCLOCK_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#ifdef  __cplusplus
extern "C" {
#endif

#ifdef _ASM
/*
 * Macro to clear the NPT (non-privileged trap) bit in the %tick/%stick
 * register.  Uses %g1-%g4.
 */
#define CLEARTICKNPT                \
    sethi   %hi(cpu_clearticknpt), %g1; \
    jmp %g1 + %lo(cpu_clearticknpt);    \
    rd  %pc, %g4

#endif /* _ASM */

#if defined(CPU_MODULE)

/*
 * Constants used to convert hi-res timestamps into nanoseconds
 * (see <sys/clock.h> file for more information)
 */

#if defined(CHEETAH) || defined(HUMMINGBIRD)

/*
 * At least 3.9MHz, for slower %stick-based systems.
 */
#define NSEC_SHIFT  8
#define VTRACE_SHIFT    8

#elif defined(SPITFIRE)

/*
 * At least 62.5 MHz, for faster %tick-based systems.
 */
#define NSEC_SHIFT  4
#define VTRACE_SHIFT    4

#else
#error "Compiling for CPU_MODULE but no CPU specified"
#endif

#endif /* CPU_MODULE */

#ifndef _ASM

#ifdef  _KERNEL

/*
 * Hardware watchdog variables and knobs
 */

#define CLK_WATCHDOG_DEFAULT    10  /* 10 seconds */

extern int  watchdog_enable;
extern int  watchdog_available;
extern int  watchdog_activated;
extern uint_t   watchdog_timeout_seconds;

/*
 * tod module name and operations
 */
struct tod_ops {
    timestruc_t (*tod_get)(void);
    void        (*tod_set)(timestruc_t);
    uint_t      (*tod_set_watchdog_timer)(uint_t);
    uint_t      (*tod_clear_watchdog_timer)(void);
    void        (*tod_set_power_alarm)(timestruc_t);
    void        (*tod_clear_power_alarm)(void);
    uint64_t    (*tod_get_cpufrequency)(void);
};

extern struct tod_ops   tod_ops;
extern char     *tod_module_name;

#endif  /* _KERNEL */

#endif  /* _ASM */

#ifdef  __cplusplus
}
#endif

#endif  /* !_SYS_MACHCLOCK_H */