92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/*
|
|
* VARCem Virtual ARchaeological Computer EMulator.
|
|
* An emulator of (mostly) x86-based PC systems and devices,
|
|
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
|
|
* spanning the era between 1981 and 1995.
|
|
*
|
|
* This file is part of the VARCem Project.
|
|
*
|
|
* Definitions for the system timer module.
|
|
*
|
|
* Version: @(#)timer.h 1.0.3 2019/04/25
|
|
*
|
|
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
|
|
* Miran Grca, <mgrca8@gmail.com>
|
|
* Sarah Walker, <tommowalker@tommowalker.co.uk>
|
|
*
|
|
* Copyright 2017-2019 Fred N. van Kempen.
|
|
* Copyright 2016-2018 Miran Grca.
|
|
* Copyright 2008-2018 Sarah Walker.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the:
|
|
*
|
|
* Free Software Foundation, Inc.
|
|
* 59 Temple Place - Suite 330
|
|
* Boston, MA 02111-1307
|
|
* USA.
|
|
*/
|
|
#ifndef EMU_TIMER_H
|
|
# define EMU_TIMER_H
|
|
|
|
|
|
#define TIMER_SHIFT 6
|
|
|
|
#define TIMER_ALWAYS_ENABLED &timer_one
|
|
|
|
|
|
extern int64_t TIMER_USEC;
|
|
extern int64_t timer_one;
|
|
extern int64_t timer_start;
|
|
extern int64_t timer_count;
|
|
|
|
|
|
#define timer_start_period(cycles) \
|
|
timer_start = cycles;
|
|
|
|
#define timer_end_period(cycles) \
|
|
do { \
|
|
int64_t __diff = timer_start - (cycles); \
|
|
timer_count -= __diff; \
|
|
timer_start = cycles; \
|
|
if (timer_count <= 0) { \
|
|
timer_process(); \
|
|
timer_update_outstanding(); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define timer_clock() \
|
|
do { \
|
|
int64_t __diff; \
|
|
if (AT) { \
|
|
__diff = timer_start - (cycles << TIMER_SHIFT); \
|
|
timer_start = cycles << TIMER_SHIFT; \
|
|
} else { \
|
|
__diff = timer_start - (cycles * xt_cpu_multi); \
|
|
timer_start = cycles * xt_cpu_multi; \
|
|
} \
|
|
timer_count -= __diff; \
|
|
timer_process(); \
|
|
timer_update_outstanding(); \
|
|
} while (0)
|
|
|
|
|
|
extern void timer_process(void);
|
|
extern void timer_update_outstanding(void);
|
|
extern void timer_reset(void);
|
|
extern int timer_add(void (*callback)(void *priv), void *priv,
|
|
int64_t *count, int64_t *enable);
|
|
|
|
|
|
#endif /*EMU_TIMER_H*/
|