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/*
* Copyright (c) 2004-2005 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
*/
#include "debug/CMOS.hh"
#include "dev/x86/cmos.hh"
#include "dev/x86/intdev.hh"
#include "mem/packet_access.hh"
void
X86ISA::Cmos::X86RTC::handleEvent()
{
assert(intPin);
intPin->raise();
//XXX This is a hack.
intPin->lower();
}
Tick
X86ISA::Cmos::read(PacketPtr pkt)
{
assert(pkt->getSize() == 1);
switch(pkt->getAddr() - pioAddr)
{
case 0x0:
pkt->set(address);
break;
case 0x1:
pkt->set(readRegister(address));
break;
default:
panic("Read from undefined CMOS port.\n");
}
pkt->makeAtomicResponse();
return latency;
}
Tick
X86ISA::Cmos::write(PacketPtr pkt)
{
assert(pkt->getSize() == 1);
switch(pkt->getAddr() - pioAddr)
{
case 0x0:
address = pkt->get<uint8_t>();
break;
case 0x1:
writeRegister(address, pkt->get<uint8_t>());
break;
default:
panic("Write to undefined CMOS port.\n");
}
pkt->makeAtomicResponse();
return latency;
}
uint8_t
X86ISA::Cmos::readRegister(uint8_t reg)
{
assert(reg < numRegs);
uint8_t val;
if (reg <= 0xD) {
val = rtc.readData(reg);
DPRINTF(CMOS,
"Reading CMOS RTC reg %x as %x.\n", reg, val);
} else {
val = regs[reg];
DPRINTF(CMOS,
"Reading non-volitile CMOS address %x as %x.\n", reg, val);
}
return val;
}
void
X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val)
{
assert(reg < numRegs);
if (reg <= 0xD) {
DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n",
reg, val);
rtc.writeData(reg, val);
} else {
DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n",
reg, val);
regs[reg] = val;
}
}
void
X86ISA::Cmos::startup()
{
rtc.startup();
}
void
X86ISA::Cmos::serialize(std::ostream &os)
{
SERIALIZE_SCALAR(address);
SERIALIZE_ARRAY(regs, numRegs);
// Serialize the timer
rtc.serialize("rtc", os);
}
void
X86ISA::Cmos::unserialize(Checkpoint *cp, const std::string §ion)
{
UNSERIALIZE_SCALAR(address);
UNSERIALIZE_ARRAY(regs, numRegs);
// Serialize the timer
rtc.unserialize("rtc", cp, section);
}
X86ISA::Cmos *
CmosParams::create()
{
return new X86ISA::Cmos(this);
}
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