qemu

FORK: QEMU emulator
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i8254.h (2506B)

      1 /*
      2  * QEMU 8253/8254 interval timer emulation
      3  *
      4  * Copyright (c) 2003-2004 Fabrice Bellard
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a copy
      7  * of this software and associated documentation files (the "Software"), to deal
      8  * in the Software without restriction, including without limitation the rights
      9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     10  * copies of the Software, and to permit persons to whom the Software is
     11  * furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
     19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
     22  * THE SOFTWARE.
     23  */
     24 
     25 #ifndef HW_I8254_H
     26 #define HW_I8254_H
     27 
     28 #include "hw/qdev-properties.h"
     29 #include "hw/isa/isa.h"
     30 #include "qapi/error.h"
     31 #include "qom/object.h"
     32 
     33 #define PIT_FREQ 1193182
     34 
     35 typedef struct PITChannelInfo {
     36     int gate;
     37     int mode;
     38     int initial_count;
     39     int out;
     40 } PITChannelInfo;
     41 
     42 #define TYPE_PIT_COMMON "pit-common"
     43 OBJECT_DECLARE_TYPE(PITCommonState, PITCommonClass, PIT_COMMON)
     44 
     45 #define TYPE_I8254 "isa-pit"
     46 #define TYPE_KVM_I8254 "kvm-pit"
     47 
     48 static inline ISADevice *i8254_pit_init(ISABus *bus, int base, int isa_irq,
     49                                         qemu_irq alt_irq)
     50 {
     51     DeviceState *dev;
     52     ISADevice *d;
     53 
     54     d = isa_new(TYPE_I8254);
     55     dev = DEVICE(d);
     56     qdev_prop_set_uint32(dev, "iobase", base);
     57     isa_realize_and_unref(d, bus, &error_fatal);
     58     qdev_connect_gpio_out(dev, 0,
     59                           isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
     60 
     61     return d;
     62 }
     63 
     64 static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
     65 {
     66     DeviceState *dev;
     67     ISADevice *d;
     68 
     69     d = isa_new(TYPE_KVM_I8254);
     70     dev = DEVICE(d);
     71     qdev_prop_set_uint32(dev, "iobase", base);
     72     isa_realize_and_unref(d, bus, &error_fatal);
     73 
     74     return d;
     75 }
     76 
     77 void pit_set_gate(ISADevice *dev, int channel, int val);
     78 void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
     79 
     80 #endif /* HW_I8254_H */