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
  20 typedef 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
  51 ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
  52                              qemu_irq intercept_irq);
  53 void rtc_set_memory(ISADevice *dev, int addr, int val);
  54 int rtc_get_memory(ISADevice *dev, int addr);
  55
  56 #endif /* MC146818RTC_H */