x86: move cpu hotplug from pc to x86
[qemu.git] / hw / rtc / sun4v-rtc.c
1 /*
2 * QEMU sun4v Real Time Clock device
3 *
4 * The sun4v_rtc device (sun4v tod clock)
5 *
6 * Copyright (c) 2016 Artyom Tarasenko
7 *
8 * This code is licensed under the GNU GPL v3 or (at your option) any later
9 * version.
10 */
11
12 #include "qemu/osdep.h"
13 #include "hw/sysbus.h"
14 #include "qapi/error.h"
15 #include "qemu/module.h"
16 #include "qemu/timer.h"
17 #include "hw/rtc/sun4v-rtc.h"
18 #include "trace.h"
19 #include "qom/object.h"
20
21
22 #define TYPE_SUN4V_RTC "sun4v_rtc"
23 typedef struct Sun4vRtc Sun4vRtc;
24 DECLARE_INSTANCE_CHECKER(Sun4vRtc, SUN4V_RTC,
25 TYPE_SUN4V_RTC)
26
27 struct Sun4vRtc {
28 SysBusDevice parent_obj;
29
30 MemoryRegion iomem;
31 };
32
33 static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr,
34 unsigned size)
35 {
36 uint64_t val = get_clock_realtime() / NANOSECONDS_PER_SECOND;
37 if (!(addr & 4ULL)) {
38 /* accessing the high 32 bits */
39 val >>= 32;
40 }
41 trace_sun4v_rtc_read(addr, val);
42 return val;
43 }
44
45 static void sun4v_rtc_write(void *opaque, hwaddr addr,
46 uint64_t val, unsigned size)
47 {
48 trace_sun4v_rtc_write(addr, val);
49 }
50
51 static const MemoryRegionOps sun4v_rtc_ops = {
52 .read = sun4v_rtc_read,
53 .write = sun4v_rtc_write,
54 .endianness = DEVICE_NATIVE_ENDIAN,
55 };
56
57 void sun4v_rtc_init(hwaddr addr)
58 {
59 DeviceState *dev;
60 SysBusDevice *s;
61
62 dev = qdev_new(TYPE_SUN4V_RTC);
63 s = SYS_BUS_DEVICE(dev);
64
65 sysbus_realize_and_unref(s, &error_fatal);
66
67 sysbus_mmio_map(s, 0, addr);
68 }
69
70 static void sun4v_rtc_realize(DeviceState *dev, Error **errp)
71 {
72 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
73 Sun4vRtc *s = SUN4V_RTC(dev);
74
75 memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s,
76 "sun4v-rtc", 0x08ULL);
77 sysbus_init_mmio(sbd, &s->iomem);
78 }
79
80 static void sun4v_rtc_class_init(ObjectClass *klass, void *data)
81 {
82 DeviceClass *dc = DEVICE_CLASS(klass);
83
84 dc->realize = sun4v_rtc_realize;
85 }
86
87 static const TypeInfo sun4v_rtc_info = {
88 .name = TYPE_SUN4V_RTC,
89 .parent = TYPE_SYS_BUS_DEVICE,
90 .instance_size = sizeof(Sun4vRtc),
91 .class_init = sun4v_rtc_class_init,
92 };
93
94 static void sun4v_rtc_register_types(void)
95 {
96 type_register_static(&sun4v_rtc_info);
97 }
98
99 type_init(sun4v_rtc_register_types)