jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
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
32#define PIT_FREQ 1193182
33
34typedef struct PITChannelInfo {
35 int gate;
36 int mode;
37 int initial_count;
38 int out;
39} PITChannelInfo;
40
41#define TYPE_PIT_COMMON "pit-common"
42#define PIT_COMMON(obj) \
43 OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)
44#define PIT_COMMON_CLASS(klass) \
45 OBJECT_CLASS_CHECK(PITCommonClass, (klass), TYPE_PIT_COMMON)
46#define PIT_COMMON_GET_CLASS(obj) \
47 OBJECT_GET_CLASS(PITCommonClass, (obj), TYPE_PIT_COMMON)
48
49#define TYPE_I8254 "isa-pit"
50#define TYPE_KVM_I8254 "kvm-pit"
51
52static inline ISADevice *i8254_pit_init(ISABus *bus, int base, int isa_irq,
53 qemu_irq alt_irq)
54{
55 DeviceState *dev;
56 ISADevice *d;
57
58 d = isa_new(TYPE_I8254);
59 dev = DEVICE(d);
60 qdev_prop_set_uint32(dev, "iobase", base);
61 isa_realize_and_unref(d, bus, &error_fatal);
62 qdev_connect_gpio_out(dev, 0,
63 isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
64
65 return d;
66}
67
68static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
69{
70 DeviceState *dev;
71 ISADevice *d;
72
73 d = isa_new(TYPE_KVM_I8254);
74 dev = DEVICE(d);
75 qdev_prop_set_uint32(dev, "iobase", base);
76 isa_realize_and_unref(d, bus, &error_fatal);
77
78 return d;
79}
80
81void pit_set_gate(ISADevice *dev, int channel, int val);
82void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
83
84#endif /* HW_I8254_H */