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/*
* 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
typedef struct PITChannelInfo {
int gate;
int mode;
int initial_count;
int out;
} PITChannelInfo;
static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
qemu_irq alt_irq)
{
ISADevice *dev;
dev = isa_create(bus, "isa-pit");
qdev_prop_set_uint32(&dev->qdev, "iobase", base);
qdev_init_nofail(&dev->qdev);
qdev_connect_gpio_out(&dev->qdev, 0,
isa_irq >= 0 ? isa_get_irq(dev, isa_irq) : alt_irq);
return dev;
}
void pit_set_gate(ISADevice *dev, int channel, int val);
void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
#endif /* !HW_I8254_H */
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