xen/pt: allow QEMU to request MSI unmasking at bind time
[qemu.git] / hw / timer / 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/hw.h"
14 #include "hw/sysbus.h"
15 #include "qemu/timer.h"
16 #include "hw/timer/sun4v-rtc.h"
17
18 //#define DEBUG_SUN4V_RTC
19
20 #ifdef DEBUG_SUN4V_RTC
21 #define DPRINTF(fmt, ...) \
22 do { printf("sun4v_rtc: " fmt , ## __VA_ARGS__); } while (0)
23 #else
24 #define DPRINTF(fmt, ...) do {} while (0)
25 #endif
26
27 #define TYPE_SUN4V_RTC "sun4v_rtc"
28 #define SUN4V_RTC(obj) OBJECT_CHECK(Sun4vRtc, (obj), TYPE_SUN4V_RTC)
29
30 typedef struct Sun4vRtc {
31 SysBusDevice parent_obj;
32
33 MemoryRegion iomem;
34 } Sun4vRtc;
35
36 static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr,
37 unsigned size)
38 {
39 uint64_t val = get_clock_realtime() / NANOSECONDS_PER_SECOND;
40 if (!(addr & 4ULL)) {
41 /* accessing the high 32 bits */
42 val >>= 32;
43 }
44 DPRINTF("read from " TARGET_FMT_plx " val %lx\n", addr, val);
45 return val;
46 }
47
48 static void sun4v_rtc_write(void *opaque, hwaddr addr,
49 uint64_t val, unsigned size)
50 {
51 DPRINTF("write 0x%x to " TARGET_FMT_plx "\n", (unsigned)val, addr);
52 }
53
54 static const MemoryRegionOps sun4v_rtc_ops = {
55 .read = sun4v_rtc_read,
56 .write = sun4v_rtc_write,
57 .endianness = DEVICE_NATIVE_ENDIAN,
58 };
59
60 void sun4v_rtc_init(hwaddr addr)
61 {
62 DeviceState *dev;
63 SysBusDevice *s;
64
65 dev = qdev_create(NULL, TYPE_SUN4V_RTC);
66 s = SYS_BUS_DEVICE(dev);
67
68 qdev_init_nofail(dev);
69
70 sysbus_mmio_map(s, 0, addr);
71 }
72
73 static int sun4v_rtc_init1(SysBusDevice *dev)
74 {
75 Sun4vRtc *s = SUN4V_RTC(dev);
76
77 memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s,
78 "sun4v-rtc", 0x08ULL);
79 sysbus_init_mmio(dev, &s->iomem);
80 return 0;
81 }
82
83 static void sun4v_rtc_class_init(ObjectClass *klass, void *data)
84 {
85 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
86
87 k->init = sun4v_rtc_init1;
88 }
89
90 static const TypeInfo sun4v_rtc_info = {
91 .name = TYPE_SUN4V_RTC,
92 .parent = TYPE_SYS_BUS_DEVICE,
93 .instance_size = sizeof(Sun4vRtc),
94 .class_init = sun4v_rtc_class_init,
95 };
96
97 static void sun4v_rtc_register_types(void)
98 {
99 type_register_static(&sun4v_rtc_info);
100 }
101
102 type_init(sun4v_rtc_register_types)