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Diffstat (limited to 'dev/tsunami_io.hh')
| -rw-r--r-- | dev/tsunami_io.hh | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/dev/tsunami_io.hh b/dev/tsunami_io.hh new file mode 100644 index 000000000..aa77645f3 --- /dev/null +++ b/dev/tsunami_io.hh @@ -0,0 +1,138 @@ +/* + * 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/mmap_device.hh" +#include "dev/tsunami.hh" + +/* + * Tsunami I/O device + */ +class TsunamiIO : public MmapDevice +{ + + private: + 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 addr, Addr mask, 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__ |