2 * QEMU sun4v Real Time Clock device
4 * The sun4v_rtc device (sun4v tod clock)
6 * Copyright (c) 2016 Artyom Tarasenko
8 * This code is licensed under the GNU GPL v3 or (at your option) any later
12 #include "qemu/osdep.h"
14 #include "hw/sysbus.h"
15 #include "qemu/timer.h"
16 #include "hw/timer/sun4v-rtc.h"
18 //#define DEBUG_SUN4V_RTC
20 #ifdef DEBUG_SUN4V_RTC
21 #define DPRINTF(fmt, ...) \
22 do { printf("sun4v_rtc: " fmt , ## __VA_ARGS__); } while (0)
24 #define DPRINTF(fmt, ...) do {} while (0)
27 #define TYPE_SUN4V_RTC "sun4v_rtc"
28 #define SUN4V_RTC(obj) OBJECT_CHECK(Sun4vRtc, (obj), TYPE_SUN4V_RTC)
30 typedef struct Sun4vRtc {
31 SysBusDevice parent_obj;
36 static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr,
39 uint64_t val = get_clock_realtime() / NANOSECONDS_PER_SECOND;
41 /* accessing the high 32 bits */
44 DPRINTF("read from " TARGET_FMT_plx " val %lx\n", addr, val);
48 static void sun4v_rtc_write(void *opaque, hwaddr addr,
49 uint64_t val, unsigned size)
51 DPRINTF("write 0x%x to " TARGET_FMT_plx "\n", (unsigned)val, addr);
54 static const MemoryRegionOps sun4v_rtc_ops = {
55 .read = sun4v_rtc_read,
56 .write = sun4v_rtc_write,
57 .endianness = DEVICE_NATIVE_ENDIAN,
60 void sun4v_rtc_init(hwaddr addr)
65 dev = qdev_create(NULL, TYPE_SUN4V_RTC);
66 s = SYS_BUS_DEVICE(dev);
68 qdev_init_nofail(dev);
70 sysbus_mmio_map(s, 0, addr);
73 static int sun4v_rtc_init1(SysBusDevice *dev)
75 Sun4vRtc *s = SUN4V_RTC(dev);
77 memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s,
78 "sun4v-rtc", 0x08ULL);
79 sysbus_init_mmio(dev, &s->iomem);
83 static void sun4v_rtc_class_init(ObjectClass *klass, void *data)
85 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
87 k->init = sun4v_rtc_init1;
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,
97 static void sun4v_rtc_register_types(void)
99 type_register_static(&sun4v_rtc_info);
102 type_init(sun4v_rtc_register_types)