2 * Copyright (c) 2008 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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31 #ifndef __DEV_X86_CMOS_HH__
32 #define __DEV_X86_CMOS_HH__
34 #include "dev/io_device.hh"
35 #include "dev/mc146818.hh"
36 #include "params/Cmos.hh"
43 class Cmos : public BasicPioDevice
50 static const int numRegs = 128;
52 uint8_t regs[numRegs];
54 uint8_t readRegister(uint8_t reg);
55 void writeRegister(uint8_t reg, uint8_t val);
57 class X86RTC : public MC146818
60 IntSourcePin * intPin;
62 X86RTC(EventManager *em, const std::string &n, const struct tm time,
63 bool bcd, Tick frequency, IntSourcePin * _intPin) :
64 MC146818(em, n, time, bcd, frequency), intPin(_intPin)
72 typedef CmosParams Params;
74 Cmos(const Params *p) : BasicPioDevice(p, 2), latency(p->pio_latency),
75 rtc(this, "rtc", p->time, true, ULL(5000000000), p->int_pin)
77 memset(regs, 0, numRegs * sizeof(uint8_t));
81 Tick read(PacketPtr pkt) override;
83 Tick write(PacketPtr pkt) override;
85 void startup() override;
87 void serialize(CheckpointOut &cp) const override;
88 void unserialize(CheckpointIn &cp) override;
93 #endif //__DEV_X86_CMOS_HH__