src/dev/riscv/rtc.cc

/*
 * Copyright (c) 2021 Huawei International
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
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 * met: redistributions of source code must retain the above copyright
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 * this software without specific prior written permission.
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#include "dev/riscv/rtc.hh"

#include "dev/mc146818.hh"
#include "params/RiscvRTC.hh"

namespace gem5
{

RiscvRTC::RiscvRTC(const Params &params) :
    SimObject(params),
    rtc(this, params.name, params.time, params.bcd,
    params.frequency, params.port_int_pin_connection_count)
{
}

RiscvRTC::RTC::RTC(EventManager *em, const std::string &n,
    const struct tm time, bool bcd, Tick frequency, int int_pin_count) :
    MC146818(em, n, time, bcd, frequency)
{
    for (int i = 0; i < int_pin_count; i++) {
        intPin.emplace_back(new IntSourcePin<RTC>(
                    csprintf("%s.int_pin[%d]", n, i), i, this));
    }
}

void
RiscvRTC::RTC::handleEvent()
{
    for (auto &pin: intPin) {
        pin->raise();
        pin->lower();
    }
}

Port &
RiscvRTC::getPort(const std::string &if_name, PortID idx)
{
    if (if_name == "int_pin")
        return *rtc.intPin.at(idx);
    else
        panic("Getting invalid port " + if_name);
}

void
RiscvRTC::startup()
{
    rtc.startup();
}

void
RiscvRTC::serialize(CheckpointOut &cp) const
{
    // Serialize the timer
    rtc.serialize("rtc", cp);
}

void
RiscvRTC::unserialize(CheckpointIn &cp)
{
    // Serialize the timer
    rtc.unserialize("rtc", cp);
}

} // namespace gem5