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 typedef struct RTCState RTCState;
  20 DECLARE_INSTANCE_CHECKER(RTCState, MC146818_RTC,
  21                          TYPE_MC146818_RTC)
  22
  23 struct RTCState {
  24     ISADevice parent_obj;
  25
  26     MemoryRegion io;
  27     MemoryRegion coalesced_io;
  28     uint8_t cmos_data[128];
  29     uint8_t cmos_index;
  30     int32_t base_year;
  31     uint64_t base_rtc;
  32     uint64_t last_update;
  33     int64_t offset;
  34     qemu_irq irq;
  35     int it_shift;
  36     /* periodic timer */
  37     QEMUTimer *periodic_timer;
  38     int64_t next_periodic_time;
  39     /* update-ended timer */
  40     QEMUTimer *update_timer;
  41     uint64_t next_alarm_time;
  42     uint16_t irq_reinject_on_ack_count;
  43     uint32_t irq_coalesced;
  44     uint32_t period;
  45     QEMUTimer *coalesced_timer;
  46     Notifier clock_reset_notifier;
  47     LostTickPolicy lost_tick_policy;
  48     Notifier suspend_notifier;
  49     QLIST_ENTRY(RTCState) link;
  50 };
  51
  52 #define RTC_ISA_IRQ 8
  53 #define RTC_ISA_BASE 0x70
  54
  55 ISADevice *mc146818_rtc_init(ISABus *bus, int base_year,
  56                              qemu_irq intercept_irq);
  57 void rtc_set_memory(ISADevice *dev, int addr, int val);
  58 int rtc_get_memory(ISADevice *dev, int addr);
  59
  60 #endif /* MC146818RTC_H */