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 #include "qom/object.h"
  17
  18 #define TYPE_MC146818_RTC "mc146818rtc"
  19 OBJECT_DECLARE_SIMPLE_TYPE(RTCState, MC146818_RTC)
  20
  21 struct 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
  53 ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
  54                              qemu_irq intercept_irq);
  55 void rtc_set_memory(ISADevice *dev, int addr, int val);
  56 int rtc_get_memory(ISADevice *dev, int addr);
  57
  58 #endif /* MC146818RTC_H */