134 lines
4 KiB
C++
134 lines
4 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Tsunami Fake I/O Space mapping including RTC/timer interrupts
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*/
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#ifndef __TSUNAMI_DMA_HH__
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#define __TSUNAMI_DMA_HH__
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#define RTC_RATE 1024
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#include "mem/functional_mem/mmap_device.hh"
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#include "dev/tsunami.hh"
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/*
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* Tsunami I/O device
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*/
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class TsunamiIO : public MmapDevice
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{
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private:
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struct tm tm;
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// In Tsunami RTC only has two i/o ports
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// one for data and one for address, so you
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// write the address and then read/write the data
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uint8_t RTCAddress;
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protected:
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class ClockEvent : public Event
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{
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protected:
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Tick interval;
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uint8_t mode;
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uint8_t status;
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public:
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ClockEvent();
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virtual void process();
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virtual const char *description();
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void Program(int count);
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void ChangeMode(uint8_t mode);
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uint8_t Status();
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};
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class RTCEvent : public Event
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{
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protected:
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Tsunami* tsunami;
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public:
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RTCEvent(Tsunami* t);
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virtual void process();
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virtual const char *description();
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};
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uint8_t uip;
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uint8_t mask1;
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uint8_t mask2;
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uint8_t mode1;
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uint8_t mode2;
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uint8_t picr; //Raw PIC interrput register, before masking
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bool picInterrupting;
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Tsunami *tsunami;
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/* This timer is initilized, but after I wrote the code
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it doesn't seem to be used again, and best I can tell
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it too is not connected to any interrupt port */
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ClockEvent timer0;
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/* This timer is used to control the speaker, which
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we normally could care less about, however it is
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also used to calculated the clockspeed and hense
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bogomips which is kinda important to the scheduler
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so we need to implemnt it although after boot I can't
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imagine we would be playing with the PC speaker much */
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ClockEvent timer2;
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RTCEvent rtc;
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uint32_t timerData;
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public:
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uint32_t frequency() const { return RTC_RATE; }
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TsunamiIO(const std::string &name, Tsunami *t, time_t init_time,
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Addr addr, Addr mask, MemoryController *mmu);
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void set_time(time_t t);
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virtual Fault read(MemReqPtr &req, uint8_t *data);
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virtual Fault write(MemReqPtr &req, const uint8_t *data);
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void postPIC(uint8_t bitvector);
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void clearPIC(uint8_t bitvector);
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virtual void serialize(std::ostream &os);
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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#endif // __TSUNAMI_IO_HH__
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