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/*
* Copyright (c) 2003 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.
*/
/* @file
* Tsunami Fake I/O Space mapping including RTC/timer interrupts
*/
#ifndef __TSUNAMI_DMA_HH__
#define __TSUNAMI_DMA_HH__
#define RTC_RATE 1024
#include "mem/functional_mem/functional_memory.hh"
#include "dev/tsunami.hh"
/*
* Tsunami I/O device
*/
class TsunamiIO : public FunctionalMemory
{
private:
Addr addr;
static const Addr size = 0xff;
struct tm tm;
// In Tsunami RTC only has two i/o ports
// one for data and one for address, so you
// write the address and then read/write the data
uint8_t RTCAddress;
protected:
class ClockEvent : public Event
{
protected:
Tick interval;
uint8_t mode;
uint8_t status;
public:
ClockEvent();
virtual void process();
virtual const char *description();
void Program(int count);
void ChangeMode(uint8_t mode);
uint8_t Status();
};
class RTCEvent : public Event
{
protected:
Tsunami* tsunami;
public:
RTCEvent(Tsunami* t);
virtual void process();
virtual const char *description();
};
uint8_t uip;
uint8_t mask1;
uint8_t mask2;
uint8_t mode1;
uint8_t mode2;
uint8_t picr; //Raw PIC interrput register, before masking
bool picInterrupting;
Tsunami *tsunami;
/*
* This timer is initilized, but after I wrote the code
* it doesn't seem to be used again, and best I can tell
* it too is not connected to any interrupt port
*/
ClockEvent timer0;
/*
* This timer is used to control the speaker, which
* we normally could care less about, however it is
* also used to calculated the clockspeed and hense
* bogomips which is kinda important to the scheduler
* so we need to implemnt it although after boot I can't
* imagine we would be playing with the PC speaker much
*/
ClockEvent timer2;
RTCEvent rtc;
uint32_t timerData;
public:
uint32_t frequency() const { return RTC_RATE; }
TsunamiIO(const std::string &name, Tsunami *t, time_t init_time,
Addr a, MemoryController *mmu);
void set_time(time_t t);
virtual Fault read(MemReqPtr &req, uint8_t *data);
virtual Fault write(MemReqPtr &req, const uint8_t *data);
void postPIC(uint8_t bitvector);
void clearPIC(uint8_t bitvector);
virtual void serialize(std::ostream &os);
virtual void unserialize(Checkpoint *cp, const std::string §ion);
};
#endif // __TSUNAMI_IO_HH__
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