LXR qemu/include/hw/rtc/mc146818rtc.h

   1/*
   2 * QEMU MC146818 RTC emulation
   3 *
   4 * Copyright (c) 2003-2004 Fabrice Bellard
   5 *
   6 * SPDX-License-Identifier: MIT
   7 */
   8
   9#ifndef HW_RTC_MC146818RTC_H
  10#define HW_RTC_MC146818RTC_H
  11
  12#include "qapi/qapi-types-machine.h"
  13#include "qemu/queue.h"
  14#include "qemu/timer.h"
  15#include "hw/isa/isa.h"
  16#include "qom/object.h"
  17
  18#define TYPE_MC146818_RTC "mc146818rtc"
  19OBJECT_DECLARE_SIMPLE_TYPE(RTCState, MC146818_RTC)
  20
  21struct RTCState {
  22    ISADevice parent_obj;
  23
  24    MemoryRegion io;
  25    MemoryRegion coalesced_io;
  26    uint8_t cmos_data[128];
  27    uint8_t cmos_index;
  28    int32_t base_year;
  29    uint64_t base_rtc;
  30    uint64_t last_update;
  31    int64_t offset;
  32    qemu_irq irq;
  33    int it_shift;
  34    /* periodic timer */
  35    QEMUTimer *periodic_timer;
  36    int64_t next_periodic_time;
  37    /* update-ended timer */
  38    QEMUTimer *update_timer;
  39    uint64_t next_alarm_time;
  40    uint16_t irq_reinject_on_ack_count;
  41    uint32_t irq_coalesced;
  42    uint32_t period;
  43    QEMUTimer *coalesced_timer;
  44    Notifier clock_reset_notifier;
  45    LostTickPolicy lost_tick_policy;
  46    Notifier suspend_notifier;
  47    QLIST_ENTRY(RTCState) link;
  48};
  49
  50#define RTC_ISA_IRQ 8
  51#define RTC_ISA_BASE 0x70
  52
  53ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
  54                             qemu_irq intercept_irq);
  55void rtc_set_memory(ISADevice *dev, int addr, int val);
  56int rtc_get_memory(ISADevice *dev, int addr);
  57
  58#endif /* MC146818RTC_H */
  59