source: vbox/trunk/include/VBox/tm.h@ 21217

/** @file
 * TM - Time Manager. (VMM)
 */

/*
 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 USA or visit http://www.sun.com if you need
 * additional information or have any questions.
 */

#ifndef ___VBox_tm_h
#define ___VBox_tm_h

#include <VBox/cdefs.h>
#include <VBox/types.h>
#ifdef IN_RING3
# include <iprt/time.h>
#endif

RT_C_DECLS_BEGIN

/** @defgroup grp_tm        The Time Manager API
 * @{
 */

/** Enable a timer hack which improves the timer response/resolution a bit. */
#define VBOX_HIGH_RES_TIMERS_HACK


/**
 * Clock type.
 */
typedef enum TMCLOCK
{
    /** Real host time.
     * This clock ticks all the time, so use with care. */
    TMCLOCK_REAL = 0,
    /** Virtual guest time.
     * This clock only ticks when the guest is running. It's implemented
     * as an offset to real time. */
    TMCLOCK_VIRTUAL,
    /** Virtual guest synchronized timer time.
     * This is a special clock and timer queue for synchronizing virtual timers and
     * virtual time sources. This clock is trying to keep up with TMCLOCK_VIRTUAL,
     * but will wait for timers to be executed. If it lags too far behind TMCLOCK_VIRTUAL,
     * it will try speed up to close the distance.
     * @remarks Do not use this unless you *must*. */
    TMCLOCK_VIRTUAL_SYNC,
    /** Virtual CPU timestamp. (Running only when we're executing guest code.) */
    TMCLOCK_TSC,
    /** Number of clocks. */
    TMCLOCK_MAX
} TMCLOCK;


/** @defgroup grp_tm_timer_flags Timer flags.
 * @{ */
/** Use the default critical section for the class of timers.
 * Only devices have one at the moment. */
#define TMTIMER_FLAGS_DEFAULT_CRIT_SECT 0
/** No critical section needed or a custom one is set using
 *  TMR3TimerSetCritSect(). */
#define TMTIMER_FLAGS_NO_CRIT_SECT      RT_BIT_32(0)
/** @} */


VMMDECL(void)     TMNotifyStartOfExecution(PVMCPU pVCpu);
VMMDECL(void)     TMNotifyEndOfExecution(PVMCPU pVCpu);
VMMDECL(void)     TMNotifyStartOfHalt(PVMCPU pVCpu);
VMMDECL(void)     TMNotifyEndOfHalt(PVMCPU pVCpu);
#ifdef IN_RING3
VMMR3DECL(int)    TMR3NotifySuspend(PVM pVM, PVMCPU pVCpu);
VMMR3DECL(int)    TMR3NotifyResume(PVM pVM, PVMCPU pVCpu);
VMMR3DECL(int)    TMR3SetWarpDrive(PVM pVM, uint32_t u32Percent);
#endif
VMMDECL(uint32_t) TMGetWarpDrive(PVM pVM);


/** @name Real Clock Methods
 * @{
 */
VMMDECL(uint64_t) TMRealGet(PVM pVM);
VMMDECL(uint64_t) TMRealGetFreq(PVM pVM);
/** @} */


/** @name Virtual Clock Methods
 * @{
 */
VMMDECL(uint64_t) TMVirtualGet(PVM pVM);
VMMDECL(uint64_t) TMVirtualGetNoCheck(PVM pVM);
VMMDECL(uint64_t) TMVirtualSyncGetLag(PVM pVM);
VMMDECL(uint32_t) TMVirtualSyncGetCatchUpPct(PVM pVM);
VMMDECL(uint64_t) TMVirtualGetFreq(PVM pVM);
VMMDECL(uint64_t) TMVirtualSyncGet(PVM pVM);
VMMDECL(uint64_t) TMVirtualSyncGetNoCheck(PVM pVM);
VMMDECL(uint64_t) TMVirtualSyncGetEx(PVM pVM, bool fCheckTimers);
VMMDECL(uint64_t) TMVirtualToNano(PVM pVM, uint64_t u64VirtualTicks);
VMMDECL(uint64_t) TMVirtualToMicro(PVM pVM, uint64_t u64VirtualTicks);
VMMDECL(uint64_t) TMVirtualToMilli(PVM pVM, uint64_t u64VirtualTicks);
VMMDECL(uint64_t) TMVirtualFromNano(PVM pVM, uint64_t u64NanoTS);
VMMDECL(uint64_t) TMVirtualFromMicro(PVM pVM, uint64_t u64MicroTS);
VMMDECL(uint64_t) TMVirtualFromMilli(PVM pVM, uint64_t u64MilliTS);
/** @} */


/** @name CPU Clock Methods
 * @{
 */
VMMDECL(uint64_t) TMCpuTickGet(PVMCPU pVCpu);
VMMDECL(uint64_t) TMCpuTickGetNoCheck(PVMCPU pVCpu);
VMMDECL(bool)     TMCpuTickCanUseRealTSC(PVMCPU pVCpu, uint64_t *poffRealTSC);
VMMDECL(int)      TMCpuTickSet(PVM pVM, PVMCPU pVCpu, uint64_t u64Tick);
VMMDECL(uint64_t) TMCpuTicksPerSecond(PVM pVM);
/** @} */


/** @name Timer Methods
 * @{
 */
/**
 * Device timer callback function.
 *
 * @param   pDevIns         Device instance of the device which registered the timer.
 * @param   pTimer          The timer handle.
 * @param   pvUser          User argument specified upon timer creation.
 */
typedef DECLCALLBACK(void) FNTMTIMERDEV(PPDMDEVINS pDevIns, PTMTIMER pTimer, void *pvUser);
/** Pointer to a device timer callback function. */
typedef FNTMTIMERDEV *PFNTMTIMERDEV;

/**
 * Driver timer callback function.
 *
 * @param   pDrvIns         Device instance of the device which registered the timer.
 * @param   pTimer          The timer handle.
 * @param   pvUser          User argument specified upon timer creation.
 */
typedef DECLCALLBACK(void) FNTMTIMERDRV(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser);
/** Pointer to a driver timer callback function. */
typedef FNTMTIMERDRV *PFNTMTIMERDRV;

/**
 * Service timer callback function.
 *
 * @param   pSrvIns         Service instance of the device which registered the timer.
 * @param   pTimer          The timer handle.
 */
typedef DECLCALLBACK(void) FNTMTIMERSRV(PPDMSRVINS pSrvIns, PTMTIMER pTimer);
/** Pointer to a service timer callback function. */
typedef FNTMTIMERSRV *PFNTMTIMERSRV;

/**
 * Internal timer callback function.
 *
 * @param   pVM             The VM.
 * @param   pTimer          The timer handle.
 * @param   pvUser          User argument specified upon timer creation.
 */
typedef DECLCALLBACK(void) FNTMTIMERINT(PVM pVM, PTMTIMER pTimer, void *pvUser);
/** Pointer to internal timer callback function. */
typedef FNTMTIMERINT *PFNTMTIMERINT;

/**
 * External timer callback function.
 *
 * @param   pvUser          User argument as specified when the timer was created.
 */
typedef DECLCALLBACK(void) FNTMTIMEREXT(void *pvUser);
/** Pointer to an external timer callback function. */
typedef FNTMTIMEREXT *PFNTMTIMEREXT;

VMMDECL(PTMTIMERR3) TMTimerR3Ptr(PTMTIMER pTimer);
VMMDECL(PTMTIMERR0) TMTimerR0Ptr(PTMTIMER pTimer);
VMMDECL(PTMTIMERRC) TMTimerRCPtr(PTMTIMER pTimer);
VMMDECL(int)        TMTimerSet(PTMTIMER pTimer, uint64_t u64Expire);
VMMDECL(int)        TMTimerSetRelative(PTMTIMER pTimer, uint64_t cTicksToNext, uint64_t *pu64Now);
VMMDECL(int)        TMTimerSetMillies(PTMTIMER pTimer, uint32_t cMilliesToNext);
VMMDECL(int)        TMTimerSetMicro(PTMTIMER pTimer, uint64_t cMicrosToNext);
VMMDECL(int)        TMTimerSetNano(PTMTIMER pTimer, uint64_t cNanosToNext);
VMMDECL(uint64_t)   TMTimerGet(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerGetNano(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerGetMicro(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerGetMilli(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerGetFreq(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerGetExpire(PTMTIMER pTimer);
VMMDECL(uint64_t)   TMTimerToNano(PTMTIMER pTimer, uint64_t u64Ticks);
VMMDECL(uint64_t)   TMTimerToMicro(PTMTIMER pTimer, uint64_t u64Ticks);
VMMDECL(uint64_t)   TMTimerToMilli(PTMTIMER pTimer, uint64_t u64Ticks);
VMMDECL(uint64_t)   TMTimerFromNano(PTMTIMER pTimer, uint64_t u64NanoTS);
VMMDECL(uint64_t)   TMTimerFromMicro(PTMTIMER pTimer, uint64_t u64MicroTS);
VMMDECL(uint64_t)   TMTimerFromMilli(PTMTIMER pTimer, uint64_t u64MilliTS);
VMMDECL(int)        TMTimerStop(PTMTIMER pTimer);
VMMDECL(bool)       TMTimerIsActive(PTMTIMER pTimer);
VMMDECL(bool)       TMTimerPollBool(PVM pVM, PVMCPU pVCpu);
VMMDECL(void)       TMTimerPollVoid(PVM pVM, PVMCPU pVCpu);
VMMDECL(uint64_t)   TMTimerPollGIP(PVM pVM, PVMCPU pVCpu, uint64_t *pu64Delta);

/** @} */


#ifdef IN_RING3
/** @defgroup grp_tm_r3     The TM Host Context Ring-3 API
 * @ingroup grp_tm
 * @{
 */
VMMR3DECL(int)    TMR3Init(PVM pVM);
VMMR3DECL(int)    TMR3InitCPU(PVM pVM);
VMMR3DECL(int)    TMR3InitFinalize(PVM pVM);
VMMR3DECL(void)   TMR3Relocate(PVM pVM, RTGCINTPTR offDelta);
VMMR3DECL(int)    TMR3Term(PVM pVM);
VMMR3DECL(int)    TMR3TermCPU(PVM pVM);
VMMR3DECL(void)   TMR3Reset(PVM pVM);
VMMR3DECL(int)    TMR3GetImportRC(PVM pVM, const char *pszSymbol, PRTRCPTR pRCPtrValue);
VMMR3DECL(int)    TMR3TimerCreateDevice(PVM pVM, PPDMDEVINS pDevIns, TMCLOCK enmClock, PFNTMTIMERDEV pfnCallback, void *pvUser, uint32_t fFlags, const char *pszDesc, PPTMTIMERR3 ppTimer);
VMMR3DECL(int)    TMR3TimerCreateDriver(PVM pVM, PPDMDRVINS pDrvIns, TMCLOCK enmClock, PFNTMTIMERDRV pfnCallback, void *pvUser, uint32_t fFlags, const char *pszDesc, PPTMTIMERR3 ppTimer);
VMMR3DECL(int)    TMR3TimerCreateInternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMERINT pfnCallback, void *pvUser, const char *pszDesc, PPTMTIMERR3 ppTimer);
VMMR3DECL(PTMTIMERR3) TMR3TimerCreateExternal(PVM pVM, TMCLOCK enmClock, PFNTMTIMEREXT pfnCallback, void *pvUser, const char *pszDesc);
VMMR3DECL(int)    TMR3TimerDestroy(PTMTIMER pTimer);
VMMR3DECL(int)    TMR3TimerDestroyDevice(PVM pVM, PPDMDEVINS pDevIns);
VMMR3DECL(int)    TMR3TimerDestroyDriver(PVM pVM, PPDMDRVINS pDrvIns);
VMMR3DECL(int)    TMR3TimerSave(PTMTIMERR3 pTimer, PSSMHANDLE pSSM);
VMMR3DECL(int)    TMR3TimerLoad(PTMTIMERR3 pTimer, PSSMHANDLE pSSM);
VMMR3DECL(int)    TMR3TimerSetCritSect(PTMTIMERR3 pTimer, PPDMCRITSECT pCritSect);
VMMR3DECL(void)   TMR3TimerQueuesDo(PVM pVM);
VMMR3DECL(void)   TMR3VirtualSyncFF(PVM pVM, PVMCPU pVCpu);
VMMR3DECL(PRTTIMESPEC) TMR3UTCNow(PVM pVM, PRTTIMESPEC pTime);
/** @} */
#endif /* IN_RING3 */


/** @} */

RT_C_DECLS_END

#endif