319ba9f527
HPET legacy emulation will require control over the PIT IRQ output. To enable this, add support for an alternative IRQ output object to the PIT factory function. If the isa_irq number is < 0, this object will be used. This also removes the IRQ number property from the PIT class as we now use a generic GPIO output pin that is connected by the factory function. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
57 lines
2 KiB
C
57 lines
2 KiB
C
/*
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* QEMU 8253/8254 interval timer emulation
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*
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* Copyright (c) 2003-2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef HW_I8254_H
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#define HW_I8254_H
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#include "hw.h"
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#include "isa.h"
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#define PIT_FREQ 1193182
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static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
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qemu_irq alt_irq)
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{
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ISADevice *dev;
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dev = isa_create(bus, "isa-pit");
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qdev_prop_set_uint32(&dev->qdev, "iobase", base);
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qdev_init_nofail(&dev->qdev);
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qdev_connect_gpio_out(&dev->qdev, 0,
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isa_irq >= 0 ? isa_get_irq(dev, isa_irq) : alt_irq);
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return dev;
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}
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void pit_set_gate(ISADevice *dev, int channel, int val);
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int pit_get_gate(ISADevice *dev, int channel);
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int pit_get_initial_count(ISADevice *dev, int channel);
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int pit_get_mode(ISADevice *dev, int channel);
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int pit_get_out(ISADevice *dev, int channel, int64_t current_time);
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void hpet_pit_disable(void);
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void hpet_pit_enable(void);
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#endif /* !HW_I8254_H */
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