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/*
* Copyright (c) 2008 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
*/
#ifndef __DEV_X86_CMOS_HH__
#define __DEV_X86_CMOS_HH__
#include "dev/intpin.hh"
#include "dev/io_device.hh"
#include "dev/mc146818.hh"
#include "params/Cmos.hh"
namespace X86ISA
{
class Cmos : public BasicPioDevice
{
protected:
Tick latency;
uint8_t address;
static const int numRegs = 128;
uint8_t regs[numRegs];
uint8_t readRegister(uint8_t reg);
void writeRegister(uint8_t reg, uint8_t val);
class X86RTC : public MC146818
{
public:
std::vector<IntSourcePin<X86RTC> *> intPin;
X86RTC(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.push_back(new IntSourcePin<X86RTC>(
csprintf("%s.int_pin[%d]", n, i), i, this));
}
}
protected:
void handleEvent();
} rtc;
public:
typedef CmosParams Params;
Cmos(const Params *p) : BasicPioDevice(p, 2), latency(p->pio_latency),
rtc(this, name() + ".rtc", p->time, true, ULL(5000000000),
p->port_int_pin_connection_count)
{
memset(regs, 0, numRegs * sizeof(uint8_t));
address = 0;
}
Port &
getPort(const std::string &if_name, PortID idx=InvalidPortID) override
{
if (if_name == "int_pin")
return *rtc.intPin.at(idx);
else
return BasicPioDevice::getPort(if_name, idx);
}
Tick read(PacketPtr pkt) override;
Tick write(PacketPtr pkt) override;
void startup() override;
void serialize(CheckpointOut &cp) const override;
void unserialize(CheckpointIn &cp) override;
};
} // namespace X86ISA
#endif //__DEV_X86_CMOS_HH__
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