]>
Commit | Line | Data |
---|---|---|
a0e89303 AT |
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" | |
252bfbde | 17 | #include "trace.h" |
a0e89303 | 18 | |
a0e89303 AT |
19 | |
20 | #define TYPE_SUN4V_RTC "sun4v_rtc" | |
21 | #define SUN4V_RTC(obj) OBJECT_CHECK(Sun4vRtc, (obj), TYPE_SUN4V_RTC) | |
22 | ||
23 | typedef struct Sun4vRtc { | |
24 | SysBusDevice parent_obj; | |
25 | ||
26 | MemoryRegion iomem; | |
27 | } Sun4vRtc; | |
28 | ||
29 | static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr, | |
30 | unsigned size) | |
31 | { | |
fff54d22 | 32 | uint64_t val = get_clock_realtime() / NANOSECONDS_PER_SECOND; |
a0e89303 AT |
33 | if (!(addr & 4ULL)) { |
34 | /* accessing the high 32 bits */ | |
35 | val >>= 32; | |
36 | } | |
252bfbde | 37 | trace_sun4v_rtc_read(addr, val); |
a0e89303 AT |
38 | return val; |
39 | } | |
40 | ||
41 | static void sun4v_rtc_write(void *opaque, hwaddr addr, | |
42 | uint64_t val, unsigned size) | |
43 | { | |
51809286 | 44 | trace_sun4v_rtc_write(addr, val); |
a0e89303 AT |
45 | } |
46 | ||
47 | static const MemoryRegionOps sun4v_rtc_ops = { | |
48 | .read = sun4v_rtc_read, | |
49 | .write = sun4v_rtc_write, | |
50 | .endianness = DEVICE_NATIVE_ENDIAN, | |
51 | }; | |
52 | ||
53 | void sun4v_rtc_init(hwaddr addr) | |
54 | { | |
55 | DeviceState *dev; | |
56 | SysBusDevice *s; | |
57 | ||
58 | dev = qdev_create(NULL, TYPE_SUN4V_RTC); | |
59 | s = SYS_BUS_DEVICE(dev); | |
60 | ||
61 | qdev_init_nofail(dev); | |
62 | ||
63 | sysbus_mmio_map(s, 0, addr); | |
64 | } | |
65 | ||
e871972e | 66 | static void sun4v_rtc_realize(DeviceState *dev, Error **errp) |
a0e89303 | 67 | { |
e871972e | 68 | SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
a0e89303 AT |
69 | Sun4vRtc *s = SUN4V_RTC(dev); |
70 | ||
71 | memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s, | |
72 | "sun4v-rtc", 0x08ULL); | |
e871972e | 73 | sysbus_init_mmio(sbd, &s->iomem); |
a0e89303 AT |
74 | } |
75 | ||
76 | static void sun4v_rtc_class_init(ObjectClass *klass, void *data) | |
77 | { | |
e871972e | 78 | DeviceClass *dc = DEVICE_CLASS(klass); |
a0e89303 | 79 | |
e871972e | 80 | dc->realize = sun4v_rtc_realize; |
a0e89303 AT |
81 | } |
82 | ||
83 | static const TypeInfo sun4v_rtc_info = { | |
84 | .name = TYPE_SUN4V_RTC, | |
85 | .parent = TYPE_SYS_BUS_DEVICE, | |
86 | .instance_size = sizeof(Sun4vRtc), | |
87 | .class_init = sun4v_rtc_class_init, | |
88 | }; | |
89 | ||
90 | static void sun4v_rtc_register_types(void) | |
91 | { | |
92 | type_register_static(&sun4v_rtc_info); | |
93 | } | |
94 | ||
95 | type_init(sun4v_rtc_register_types) |