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-misc.h"
  13#include "qemu/queue.h"
  14#include "qemu/timer.h"
  15#include "hw/isa/isa.h"
  16
  17#define TYPE_MC146818_RTC "mc146818rtc"
  18#define MC146818_RTC(obj) OBJECT_CHECK(RTCState, (obj), TYPE_MC146818_RTC)
  19
  20typedef struct RTCState {
  21    ISADevice parent_obj;
  22
  23    MemoryRegion io;
  24    MemoryRegion coalesced_io;
  25    uint8_t cmos_data[128];
  26    uint8_t cmos_index;
  27    int32_t base_year;
  28    uint64_t base_rtc;
  29    uint64_t last_update;
  30    int64_t offset;
  31    qemu_irq irq;
  32    int it_shift;
  33    /* periodic timer */
  34    QEMUTimer *periodic_timer;
  35    int64_t next_periodic_time;
  36    /* update-ended timer */
  37    QEMUTimer *update_timer;
  38    uint64_t next_alarm_time;
  39    uint16_t irq_reinject_on_ack_count;
  40    uint32_t irq_coalesced;
  41    uint32_t period;
  42    QEMUTimer *coalesced_timer;
  43    Notifier clock_reset_notifier;
  44    LostTickPolicy lost_tick_policy;
  45    Notifier suspend_notifier;
  46    QLIST_ENTRY(RTCState) link;
  47} RTCState;
  48
  49#define RTC_ISA_IRQ 8
  50
  51ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
  52                             qemu_irq intercept_irq);
  53void rtc_set_memory(ISADevice *dev, int addr, int val);
  54int rtc_get_memory(ISADevice *dev, int addr);
  55
  56#endif /* MC146818RTC_H */
  57