diff options
Diffstat (limited to 'include/hw/timer/i8254.h')
-rw-r--r-- | include/hw/timer/i8254.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/include/hw/timer/i8254.h b/include/hw/timer/i8254.h new file mode 100644 index 000000000..3e569f42b --- /dev/null +++ b/include/hw/timer/i8254.h @@ -0,0 +1,80 @@ +/* + * 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/qdev-properties.h" +#include "hw/isa/isa.h" +#include "qapi/error.h" +#include "qom/object.h" + +#define PIT_FREQ 1193182 + +typedef struct PITChannelInfo { + int gate; + int mode; + int initial_count; + int out; +} PITChannelInfo; + +#define TYPE_PIT_COMMON "pit-common" +OBJECT_DECLARE_TYPE(PITCommonState, PITCommonClass, PIT_COMMON) + +#define TYPE_I8254 "isa-pit" +#define TYPE_KVM_I8254 "kvm-pit" + +static inline ISADevice *i8254_pit_init(ISABus *bus, int base, int isa_irq, + qemu_irq alt_irq) +{ + DeviceState *dev; + ISADevice *d; + + d = isa_new(TYPE_I8254); + dev = DEVICE(d); + qdev_prop_set_uint32(dev, "iobase", base); + isa_realize_and_unref(d, bus, &error_fatal); + qdev_connect_gpio_out(dev, 0, + isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq); + + return d; +} + +static inline ISADevice *kvm_pit_init(ISABus *bus, int base) +{ + DeviceState *dev; + ISADevice *d; + + d = isa_new(TYPE_KVM_I8254); + dev = DEVICE(d); + qdev_prop_set_uint32(dev, "iobase", base); + isa_realize_and_unref(d, bus, &error_fatal); + + return d; +} + +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 */ |