[qemu.git] / softmmu / timers-state.h

/*
 * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef TIMERS_STATE_H
#define TIMERS_STATE_H

/* timers state, for sharing between icount and cpu-timers */

typedef struct TimersState {
    /* Protected by BQL.  */
    int64_t cpu_ticks_prev;
    int64_t cpu_ticks_offset;

    /*
     * Protect fields that can be respectively read outside the
     * BQL, and written from multiple threads.
     */
    QemuSeqLock vm_clock_seqlock;
    QemuSpin vm_clock_lock;

    int16_t cpu_ticks_enabled;

    /* Conversion factor from emulated instructions to virtual clock ticks.  */
    int16_t icount_time_shift;
    /* Icount delta used for shift auto adjust. */
    int64_t last_delta;

    /* Compensate for varying guest execution speed.  */
    aligned_int64_t qemu_icount_bias;

    int64_t vm_clock_warp_start;
    int64_t cpu_clock_offset;

    /* Only written by TCG thread */
    int64_t qemu_icount;

    /* for adjusting icount */
    QEMUTimer *icount_rt_timer;
    QEMUTimer *icount_vm_timer;
    QEMUTimer *icount_warp_timer;
} TimersState;

extern TimersState timers_state;

/*
 * icount needs this internal from cpu-timers when adjusting the icount shift.
 */
int64_t cpu_get_clock_locked(void);

#endif /* TIMERS_STATE_H */
Commit	Line	Data
740b1759 CF	1	/*
	2	* QEMU System Emulator
	3	*
	4	* Copyright (c) 2003-2008 Fabrice Bellard
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24
	25	#ifndef TIMERS_STATE_H
	26	#define TIMERS_STATE_H
	27
	28	/* timers state, for sharing between icount and cpu-timers */
	29
	30	typedef struct TimersState {
	31	/* Protected by BQL. */
	32	int64_t cpu_ticks_prev;
	33	int64_t cpu_ticks_offset;
	34
	35	/*
	36	* Protect fields that can be respectively read outside the
	37	* BQL, and written from multiple threads.
	38	*/
	39	QemuSeqLock vm_clock_seqlock;
	40	QemuSpin vm_clock_lock;
	41
	42	int16_t cpu_ticks_enabled;
	43
	44	/* Conversion factor from emulated instructions to virtual clock ticks. */
	45	int16_t icount_time_shift;
fe852ac2 PD	46	/* Icount delta used for shift auto adjust. */
fe852ac2 PD	47	int64_t last_delta;
740b1759 CF	48
740b1759 CF	49	/* Compensate for varying guest execution speed. */
9ef0c6d6	50	aligned_int64_t qemu_icount_bias;
740b1759 CF	51
	52	int64_t vm_clock_warp_start;
	53	int64_t cpu_clock_offset;
	54
	55	/* Only written by TCG thread */
	56	int64_t qemu_icount;
	57
	58	/* for adjusting icount */
	59	QEMUTimer *icount_rt_timer;
	60	QEMUTimer *icount_vm_timer;
	61	QEMUTimer *icount_warp_timer;
	62	} TimersState;
	63
	64	extern TimersState timers_state;
	65
	66	/*
	67	* icount needs this internal from cpu-timers when adjusting the icount shift.
	68	*/
	69	int64_t cpu_get_clock_locked(void);
	70
	71	#endif /* TIMERS_STATE_H */