abc76f20cb
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
359 lines
10 KiB
C++
359 lines
10 KiB
C++
/*
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* Copyright (c) 2004-2005 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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* Authors: Ali Saidi
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* Andrew Schultz
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* Miguel Serrano
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*/
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/** @file
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* Tsunami I/O Space mapping including RTC/timer interrupts
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*/
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#ifndef __DEV_TSUNAMI_IO_HH__
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#define __DEV_TSUNAMI_IO_HH__
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#include "base/range.hh"
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#include "dev/alpha/tsunami.hh"
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#include "dev/io_device.hh"
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#include "params/TsunamiIO.hh"
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#include "sim/eventq.hh"
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/**
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* Tsunami I/O device is a catch all for all the south bridge stuff we care
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* to implement.
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*/
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class TsunamiIO : public BasicPioDevice
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{
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private:
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struct tm tm;
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protected:
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/** Real-Time Clock (MC146818) */
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class RTC
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{
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private:
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/** Event for RTC periodic interrupt */
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struct RTCEvent : public Event
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{
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/** A pointer back to tsunami to create interrupt the processor. */
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Tsunami* tsunami;
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Tick interval;
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RTCEvent(Tsunami* t, Tick i);
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/** Schedule the RTC periodic interrupt */
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void scheduleIntr();
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/** Event process to occur at interrupt*/
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virtual void process();
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/** Event description */
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virtual const char *description();
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};
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private:
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std::string _name;
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const std::string &name() const { return _name; }
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/** RTC periodic interrupt event */
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RTCEvent event;
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/** Current RTC register address/index */
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int addr;
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/** Data for real-time clock function */
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union {
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uint8_t clock_data[10];
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struct {
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uint8_t sec;
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uint8_t sec_alrm;
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uint8_t min;
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uint8_t min_alrm;
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uint8_t hour;
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uint8_t hour_alrm;
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uint8_t wday;
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uint8_t mday;
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uint8_t mon;
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uint8_t year;
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};
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};
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/** RTC status register A */
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uint8_t stat_regA;
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/** RTC status register B */
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uint8_t stat_regB;
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public:
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RTC(const std::string &name, Tsunami* tsunami,
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const TsunamiIOParams *params);
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/** RTC address port: write address of RTC RAM data to access */
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void writeAddr(const uint8_t data);
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/** RTC write data */
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void writeData(const uint8_t data);
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/** RTC read data */
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uint8_t readData();
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/**
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* Serialize this object to the given output stream.
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* @param base The base name of the counter object.
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* @param os The stream to serialize to.
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*/
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void serialize(const std::string &base, std::ostream &os);
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/**
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* Reconstruct the state of this object from a checkpoint.
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* @param base The base name of the counter object.
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* @param cp The checkpoint use.
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* @param section The section name of this object
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*/
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void unserialize(const std::string &base, Checkpoint *cp,
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const std::string §ion);
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};
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/** Programmable Interval Timer (Intel 8254) */
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class PITimer
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{
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/** Counter element for PIT */
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class Counter
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{
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/** Event for counter interrupt */
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class CounterEvent : public Event
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{
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private:
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/** Pointer back to Counter */
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Counter* counter;
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Tick interval;
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public:
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CounterEvent(Counter*);
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/** Event process */
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virtual void process();
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/** Event description */
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virtual const char *description();
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friend class Counter;
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};
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private:
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std::string _name;
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const std::string &name() const { return _name; }
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CounterEvent event;
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/** Current count value */
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uint16_t count;
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/** Latched count */
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uint16_t latched_count;
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/** Interrupt period */
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uint16_t period;
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/** Current mode of operation */
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uint8_t mode;
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/** Output goes high when the counter reaches zero */
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bool output_high;
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/** State of the count latch */
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bool latch_on;
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/** Set of values for read_byte and write_byte */
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enum {LSB, MSB};
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/** Determine which byte of a 16-bit count value to read/write */
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uint8_t read_byte, write_byte;
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public:
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Counter(const std::string &name);
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/** Latch the current count (if one is not already latched) */
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void latchCount();
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/** Set the read/write mode */
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void setRW(int rw_val);
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/** Set operational mode */
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void setMode(int mode_val);
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/** Set count encoding */
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void setBCD(int bcd_val);
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/** Read a count byte */
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uint8_t read();
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/** Write a count byte */
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void write(const uint8_t data);
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/** Is the output high? */
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bool outputHigh();
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/**
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* Serialize this object to the given output stream.
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* @param base The base name of the counter object.
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* @param os The stream to serialize to.
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*/
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void serialize(const std::string &base, std::ostream &os);
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/**
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* Reconstruct the state of this object from a checkpoint.
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* @param base The base name of the counter object.
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* @param cp The checkpoint use.
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* @param section The section name of this object
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*/
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void unserialize(const std::string &base, Checkpoint *cp,
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const std::string §ion);
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};
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private:
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std::string _name;
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const std::string &name() const { return _name; }
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/** PIT has three seperate counters */
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Counter *counter[3];
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public:
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/** Public way to access individual counters (avoid array accesses) */
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Counter counter0;
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Counter counter1;
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Counter counter2;
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PITimer(const std::string &name);
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/** Write control word */
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void writeControl(const uint8_t data);
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/**
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* Serialize this object to the given output stream.
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* @param base The base name of the counter object.
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* @param os The stream to serialize to.
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*/
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void serialize(const std::string &base, std::ostream &os);
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/**
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* Reconstruct the state of this object from a checkpoint.
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* @param base The base name of the counter object.
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* @param cp The checkpoint use.
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* @param section The section name of this object
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*/
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void unserialize(const std::string &base, Checkpoint *cp,
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const std::string §ion);
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};
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/** Mask of the PIC1 */
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uint8_t mask1;
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/** Mask of the PIC2 */
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uint8_t mask2;
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/** Mode of PIC1. Not used for anything */
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uint8_t mode1;
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/** Mode of PIC2. Not used for anything */
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uint8_t mode2;
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/** Raw PIC interrupt register before masking */
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uint8_t picr; //Raw PIC interrput register
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/** Is the pic interrupting right now or not. */
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bool picInterrupting;
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/** A pointer to the Tsunami device which be belong to */
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Tsunami *tsunami;
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/** Intel 8253 Periodic Interval Timer */
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PITimer pitimer;
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RTC rtc;
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/** The interval is set via two writes to the PIT.
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* This variable contains a flag as to how many writes have happened, and
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* the time so far.
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*/
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uint16_t timerData;
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public:
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/**
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* Return the freqency of the RTC
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* @return interrupt rate of the RTC
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*/
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Tick frequency() const;
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public:
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typedef TsunamiIOParams Params;
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/**
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* Initialize all the data for devices supported by Tsunami I/O.
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* @param p pointer to Params struct
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*/
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TsunamiIO(const Params *p);
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const Params *
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params() const
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{
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return dynamic_cast<const Params *>(_params);
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}
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virtual Tick read(PacketPtr pkt);
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virtual Tick write(PacketPtr pkt);
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/**
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* Post an PIC interrupt to the CPU via the CChip
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* @param bitvector interrupt to post.
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*/
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void postPIC(uint8_t bitvector);
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/**
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* Clear a posted interrupt
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* @param bitvector interrupt to clear
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*/
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void clearPIC(uint8_t bitvector);
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/**
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* Serialize this object to the given output stream.
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* @param os The stream to serialize to.
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*/
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virtual void serialize(std::ostream &os);
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/**
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* Reconstruct the state of this object from a checkpoint.
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* @param cp The checkpoint use.
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* @param section The section name of this object
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*/
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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#endif // __DEV_TSUNAMI_IO_HH__
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