| 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" |
| 19 | OBJECT_DECLARE_SIMPLE_TYPE(MC146818RtcState, MC146818_RTC) |
| 20 | |
| 21 | struct MC146818RtcState { |
| 22 | ISADevice parent_obj; |
| 23 | |
| 24 | MemoryRegion io; |
| 25 | MemoryRegion coalesced_io; |
| 26 | uint8_t cmos_data[128]; |
| 27 | uint8_t cmos_index; |
| 28 | uint8_t isairq; |
| 29 | uint16_t io_base; |
| 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(MC146818RtcState) link; |
| 50 | }; |
| 51 | |
| 52 | #define RTC_ISA_IRQ 8 |
| 53 | |
| 54 | MC146818RtcState *mc146818_rtc_init(ISABus *bus, int base_year, |
| 55 | qemu_irq intercept_irq); |
| 56 | void mc146818rtc_set_cmos_data(MC146818RtcState *s, int addr, int val); |
| 57 | int mc146818rtc_get_cmos_data(MC146818RtcState *s, int addr); |
| 58 | void rtc_reset_reinjection(MC146818RtcState *rtc); |
| 59 | |
| 60 | #endif /* HW_RTC_MC146818RTC_H */ |