55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/*
|
|
* QEMU 8253/8254 interval timer emulation
|
|
*
|
|
* Copyright (c) 2003-2004 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 HW_I8254_H
|
|
#define HW_I8254_H
|
|
|
|
#include "hw.h"
|
|
#include "isa.h"
|
|
|
|
#define PIT_FREQ 1193182
|
|
|
|
static inline ISADevice *pit_init(ISABus *bus, int base, int irq)
|
|
{
|
|
ISADevice *dev;
|
|
|
|
dev = isa_create(bus, "isa-pit");
|
|
qdev_prop_set_uint32(&dev->qdev, "iobase", base);
|
|
qdev_prop_set_uint32(&dev->qdev, "irq", irq);
|
|
qdev_init_nofail(&dev->qdev);
|
|
|
|
return dev;
|
|
}
|
|
|
|
void pit_set_gate(ISADevice *dev, int channel, int val);
|
|
int pit_get_gate(ISADevice *dev, int channel);
|
|
int pit_get_initial_count(ISADevice *dev, int channel);
|
|
int pit_get_mode(ISADevice *dev, int channel);
|
|
int pit_get_out(ISADevice *dev, int channel, int64_t current_time);
|
|
|
|
void hpet_pit_disable(void);
|
|
void hpet_pit_enable(void);
|
|
|
|
#endif /* !HW_I8254_H */
|