cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

sun4v-rtc.c (2219B)

      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"
     23OBJECT_DECLARE_SIMPLE_TYPE(Sun4vRtc, SUN4V_RTC)
     24
     25struct Sun4vRtc {
     26    SysBusDevice parent_obj;
     27
     28    MemoryRegion iomem;
     29};
     30
     31static uint64_t sun4v_rtc_read(void *opaque, hwaddr addr,
     32                                unsigned size)
     33{
     34    uint64_t val = get_clock_realtime() / NANOSECONDS_PER_SECOND;
     35    if (!(addr & 4ULL)) {
     36        /* accessing the high 32 bits */
     37        val >>= 32;
     38    }
     39    trace_sun4v_rtc_read(addr, val);
     40    return val;
     41}
     42
     43static void sun4v_rtc_write(void *opaque, hwaddr addr,
     44                             uint64_t val, unsigned size)
     45{
     46    trace_sun4v_rtc_write(addr, val);
     47}
     48
     49static const MemoryRegionOps sun4v_rtc_ops = {
     50    .read = sun4v_rtc_read,
     51    .write = sun4v_rtc_write,
     52    .endianness = DEVICE_NATIVE_ENDIAN,
     53};
     54
     55void sun4v_rtc_init(hwaddr addr)
     56{
     57    DeviceState *dev;
     58    SysBusDevice *s;
     59
     60    dev = qdev_new(TYPE_SUN4V_RTC);
     61    s = SYS_BUS_DEVICE(dev);
     62
     63    sysbus_realize_and_unref(s, &error_fatal);
     64
     65    sysbus_mmio_map(s, 0, addr);
     66}
     67
     68static void sun4v_rtc_realize(DeviceState *dev, Error **errp)
     69{
     70    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     71    Sun4vRtc *s = SUN4V_RTC(dev);
     72
     73    memory_region_init_io(&s->iomem, OBJECT(s), &sun4v_rtc_ops, s,
     74                          "sun4v-rtc", 0x08ULL);
     75    sysbus_init_mmio(sbd, &s->iomem);
     76}
     77
     78static void sun4v_rtc_class_init(ObjectClass *klass, void *data)
     79{
     80    DeviceClass *dc = DEVICE_CLASS(klass);
     81
     82    dc->realize = sun4v_rtc_realize;
     83}
     84
     85static const TypeInfo sun4v_rtc_info = {
     86    .name          = TYPE_SUN4V_RTC,
     87    .parent        = TYPE_SYS_BUS_DEVICE,
     88    .instance_size = sizeof(Sun4vRtc),
     89    .class_init    = sun4v_rtc_class_init,
     90};
     91
     92static void sun4v_rtc_register_types(void)
     93{
     94    type_register_static(&sun4v_rtc_info);
     95}
     96
     97type_init(sun4v_rtc_register_types)