From: Gabe Black Date: Thu, 12 Jun 2008 04:54:48 +0000 (-0400) Subject: Dev: Seperate the 8254 timer from tsunami and use it in that and the PC. X-Git-Tag: m5_2.0_beta6~139 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4f9a0402f629dbd78494bd7e820ffa41b0a5f245;p=gem5.git Dev: Seperate the 8254 timer from tsunami and use it in that and the PC. --- diff --git a/src/dev/SConscript b/src/dev/SConscript index ee7adb8c8..bd6b16c43 100644 --- a/src/dev/SConscript +++ b/src/dev/SConscript @@ -54,6 +54,7 @@ if env['FULL_SYSTEM']: Source('i8254xGBe.cc') Source('ide_ctrl.cc') Source('ide_disk.cc') + Source('intel_8254_timer.cc') Source('io_device.cc') Source('isa_fake.cc') Source('mc146818.cc') @@ -84,6 +85,7 @@ if env['FULL_SYSTEM']: TraceFlag('EthernetSM') TraceFlag('IdeCtrl') TraceFlag('IdeDisk') + TraceFlag('Intel8254Timer') TraceFlag('IsaFake') TraceFlag('MC146818') TraceFlag('PCIDEV') diff --git a/src/dev/alpha/tsunami_io.cc b/src/dev/alpha/tsunami_io.cc index 88999ecc5..3496aed14 100644 --- a/src/dev/alpha/tsunami_io.cc +++ b/src/dev/alpha/tsunami_io.cc @@ -62,230 +62,6 @@ TsunamiIO::TsunamiRTC::TsunamiRTC(const string &n, const TsunamiIOParams *p) : { } -TsunamiIO::PITimer::PITimer(const string &name) - : _name(name), counter0(name + ".counter0"), counter1(name + ".counter1"), - counter2(name + ".counter2") -{ - counter[0] = &counter0; - counter[1] = &counter0; - counter[2] = &counter0; -} - -void -TsunamiIO::PITimer::writeControl(const uint8_t data) -{ - int rw; - int sel; - - sel = GET_CTRL_SEL(data); - - if (sel == PIT_READ_BACK) - panic("PITimer Read-Back Command is not implemented.\n"); - - rw = GET_CTRL_RW(data); - - if (rw == PIT_RW_LATCH_COMMAND) - counter[sel]->latchCount(); - else { - counter[sel]->setRW(rw); - counter[sel]->setMode(GET_CTRL_MODE(data)); - counter[sel]->setBCD(GET_CTRL_BCD(data)); - } -} - -void -TsunamiIO::PITimer::serialize(const string &base, ostream &os) -{ - // serialize the counters - counter0.serialize(base + ".counter0", os); - counter1.serialize(base + ".counter1", os); - counter2.serialize(base + ".counter2", os); -} - -void -TsunamiIO::PITimer::unserialize(const string &base, Checkpoint *cp, - const string §ion) -{ - // unserialze the counters - counter0.unserialize(base + ".counter0", cp, section); - counter1.unserialize(base + ".counter1", cp, section); - counter2.unserialize(base + ".counter2", cp, section); -} - -TsunamiIO::PITimer::Counter::Counter(const string &name) - : _name(name), event(this), count(0), latched_count(0), period(0), - mode(0), output_high(false), latch_on(false), read_byte(LSB), - write_byte(LSB) -{ - -} - -void -TsunamiIO::PITimer::Counter::latchCount() -{ - // behave like a real latch - if(!latch_on) { - latch_on = true; - read_byte = LSB; - latched_count = count; - } -} - -uint8_t -TsunamiIO::PITimer::Counter::read() -{ - if (latch_on) { - switch (read_byte) { - case LSB: - read_byte = MSB; - return (uint8_t)latched_count; - break; - case MSB: - read_byte = LSB; - latch_on = false; - return latched_count >> 8; - break; - default: - panic("Shouldn't be here"); - } - } else { - switch (read_byte) { - case LSB: - read_byte = MSB; - return (uint8_t)count; - break; - case MSB: - read_byte = LSB; - return count >> 8; - break; - default: - panic("Shouldn't be here"); - } - } -} - -void -TsunamiIO::PITimer::Counter::write(const uint8_t data) -{ - switch (write_byte) { - case LSB: - count = (count & 0xFF00) | data; - - if (event.scheduled()) - event.deschedule(); - output_high = false; - write_byte = MSB; - break; - - case MSB: - count = (count & 0x00FF) | (data << 8); - period = count; - - if (period > 0) { - DPRINTF(Tsunami, "Timer set to curTick + %d\n", - count * event.interval); - event.schedule(curTick + count * event.interval); - } - write_byte = LSB; - break; - } -} - -void -TsunamiIO::PITimer::Counter::setRW(int rw_val) -{ - if (rw_val != PIT_RW_16BIT) - panic("Only LSB/MSB read/write is implemented.\n"); -} - -void -TsunamiIO::PITimer::Counter::setMode(int mode_val) -{ - if(mode_val != PIT_MODE_INTTC && mode_val != PIT_MODE_RATEGEN && - mode_val != PIT_MODE_SQWAVE) - panic("PIT mode %#x is not implemented: \n", mode_val); - - mode = mode_val; -} - -void -TsunamiIO::PITimer::Counter::setBCD(int bcd_val) -{ - if (bcd_val != PIT_BCD_FALSE) - panic("PITimer does not implement BCD counts.\n"); -} - -bool -TsunamiIO::PITimer::Counter::outputHigh() -{ - return output_high; -} - -void -TsunamiIO::PITimer::Counter::serialize(const string &base, ostream &os) -{ - paramOut(os, base + ".count", count); - paramOut(os, base + ".latched_count", latched_count); - paramOut(os, base + ".period", period); - paramOut(os, base + ".mode", mode); - paramOut(os, base + ".output_high", output_high); - paramOut(os, base + ".latch_on", latch_on); - paramOut(os, base + ".read_byte", read_byte); - paramOut(os, base + ".write_byte", write_byte); - - Tick event_tick = 0; - if (event.scheduled()) - event_tick = event.when(); - paramOut(os, base + ".event_tick", event_tick); -} - -void -TsunamiIO::PITimer::Counter::unserialize(const string &base, Checkpoint *cp, - const string §ion) -{ - paramIn(cp, section, base + ".count", count); - paramIn(cp, section, base + ".latched_count", latched_count); - paramIn(cp, section, base + ".period", period); - paramIn(cp, section, base + ".mode", mode); - paramIn(cp, section, base + ".output_high", output_high); - paramIn(cp, section, base + ".latch_on", latch_on); - paramIn(cp, section, base + ".read_byte", read_byte); - paramIn(cp, section, base + ".write_byte", write_byte); - - Tick event_tick; - paramIn(cp, section, base + ".event_tick", event_tick); - if (event_tick) - event.schedule(event_tick); -} - -TsunamiIO::PITimer::Counter::CounterEvent::CounterEvent(Counter* c_ptr) - : Event(&mainEventQueue) -{ - interval = (Tick)(Clock::Float::s / 1193180.0); - counter = c_ptr; -} - -void -TsunamiIO::PITimer::Counter::CounterEvent::process() -{ - DPRINTF(Tsunami, "Timer Interrupt\n"); - switch (counter->mode) { - case PIT_MODE_INTTC: - counter->output_high = true; - case PIT_MODE_RATEGEN: - case PIT_MODE_SQWAVE: - break; - default: - panic("Unimplemented PITimer mode.\n"); - } -} - -const char * -TsunamiIO::PITimer::Counter::CounterEvent::description() const -{ - return "tsunami 8254 Interval timer"; -} - TsunamiIO::TsunamiIO(const Params *p) : BasicPioDevice(p), tsunami(p->tsunami), pitimer(p->name + "pitimer"), rtc(p->name + ".rtc", p) diff --git a/src/dev/alpha/tsunami_io.hh b/src/dev/alpha/tsunami_io.hh index 3972efa48..736f498c7 100644 --- a/src/dev/alpha/tsunami_io.hh +++ b/src/dev/alpha/tsunami_io.hh @@ -39,6 +39,7 @@ #include "base/range.hh" #include "dev/alpha/tsunami.hh" +#include "dev/intel_8254_timer.hh" #include "dev/mc146818.hh" #include "dev/io_device.hh" #include "params/TsunamiIO.hh" @@ -69,138 +70,6 @@ class TsunamiIO : public BasicPioDevice } }; - /** Programmable Interval Timer (Intel 8254) */ - class PITimer - { - /** Counter element for PIT */ - class Counter - { - /** Event for counter interrupt */ - class CounterEvent : public Event - { - private: - /** Pointer back to Counter */ - Counter* counter; - Tick interval; - - public: - CounterEvent(Counter*); - - /** Event process */ - virtual void process(); - - /** Event description */ - virtual const char *description() const; - - friend class Counter; - }; - - private: - std::string _name; - const std::string &name() const { return _name; } - - CounterEvent event; - - /** Current count value */ - uint16_t count; - - /** Latched count */ - uint16_t latched_count; - - /** Interrupt period */ - uint16_t period; - - /** Current mode of operation */ - uint8_t mode; - - /** Output goes high when the counter reaches zero */ - bool output_high; - - /** State of the count latch */ - bool latch_on; - - /** Set of values for read_byte and write_byte */ - enum {LSB, MSB}; - - /** Determine which byte of a 16-bit count value to read/write */ - uint8_t read_byte, write_byte; - - public: - Counter(const std::string &name); - - /** Latch the current count (if one is not already latched) */ - void latchCount(); - - /** Set the read/write mode */ - void setRW(int rw_val); - - /** Set operational mode */ - void setMode(int mode_val); - - /** Set count encoding */ - void setBCD(int bcd_val); - - /** Read a count byte */ - uint8_t read(); - - /** Write a count byte */ - void write(const uint8_t data); - - /** Is the output high? */ - bool outputHigh(); - - /** - * Serialize this object to the given output stream. - * @param base The base name of the counter object. - * @param os The stream to serialize to. - */ - void serialize(const std::string &base, std::ostream &os); - - /** - * Reconstruct the state of this object from a checkpoint. - * @param base The base name of the counter object. - * @param cp The checkpoint use. - * @param section The section name of this object - */ - void unserialize(const std::string &base, Checkpoint *cp, - const std::string §ion); - }; - - private: - std::string _name; - const std::string &name() const { return _name; } - - /** PIT has three seperate counters */ - Counter *counter[3]; - - public: - /** Public way to access individual counters (avoid array accesses) */ - Counter counter0; - Counter counter1; - Counter counter2; - - PITimer(const std::string &name); - - /** Write control word */ - void writeControl(const uint8_t data); - - /** - * Serialize this object to the given output stream. - * @param base The base name of the counter object. - * @param os The stream to serialize to. - */ - void serialize(const std::string &base, std::ostream &os); - - /** - * Reconstruct the state of this object from a checkpoint. - * @param base The base name of the counter object. - * @param cp The checkpoint use. - * @param section The section name of this object - */ - void unserialize(const std::string &base, Checkpoint *cp, - const std::string §ion); - }; - /** Mask of the PIC1 */ uint8_t mask1; @@ -223,7 +92,7 @@ class TsunamiIO : public BasicPioDevice Tsunami *tsunami; /** Intel 8253 Periodic Interval Timer */ - PITimer pitimer; + Intel8254Timer pitimer; TsunamiRTC rtc; diff --git a/src/dev/intel_8254_timer.cc b/src/dev/intel_8254_timer.cc new file mode 100644 index 000000000..16d09f582 --- /dev/null +++ b/src/dev/intel_8254_timer.cc @@ -0,0 +1,255 @@ +/* + * Copyright (c) 2004, 2005 + * The Regents of The University of Michigan + * All Rights Reserved + * + * This code is part of the M5 simulator. + * + * Permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any + * purpose, so long as the copyright notice above, this grant of + * permission, and the disclaimer below appear in all copies made; and + * so long as the name of The University of Michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. + * + * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE + * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND + * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE + * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT, + * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM + * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN + * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGES. + * + * Authors: Ali G. Saidi + * Andrew L. Schultz + * Miguel J. Serrano + */ + +#include "base/misc.hh" +#include "dev/intel_8254_timer.hh" + +using namespace std; + +Intel8254Timer::Intel8254Timer(const string &name) + : _name(name), counter0(name + ".counter0"), counter1(name + ".counter1"), + counter2(name + ".counter2") +{ + counter[0] = &counter0; + counter[1] = &counter0; + counter[2] = &counter0; +} + +void +Intel8254Timer::writeControl(const CtrlReg data) +{ + int sel = data.sel; + + if (sel == ReadBackCommand) + panic("PITimer Read-Back Command is not implemented.\n"); + + if (data.rw == LatchCommand) + counter[sel]->latchCount(); + else { + counter[sel]->setRW(data.rw); + counter[sel]->setMode(data.mode); + counter[sel]->setBCD(data.bcd); + } +} + +void +Intel8254Timer::serialize(const string &base, ostream &os) +{ + // serialize the counters + counter0.serialize(base + ".counter0", os); + counter1.serialize(base + ".counter1", os); + counter2.serialize(base + ".counter2", os); +} + +void +Intel8254Timer::unserialize(const string &base, Checkpoint *cp, + const string §ion) +{ + // unserialze the counters + counter0.unserialize(base + ".counter0", cp, section); + counter1.unserialize(base + ".counter1", cp, section); + counter2.unserialize(base + ".counter2", cp, section); +} + +Intel8254Timer::Counter::Counter(const string &name) + : _name(name), event(this), count(0), latched_count(0), period(0), + mode(0), output_high(false), latch_on(false), read_byte(LSB), + write_byte(LSB) +{ + +} + +void +Intel8254Timer::Counter::latchCount() +{ + // behave like a real latch + if(!latch_on) { + latch_on = true; + read_byte = LSB; + latched_count = count; + } +} + +uint8_t +Intel8254Timer::Counter::read() +{ + if (latch_on) { + switch (read_byte) { + case LSB: + read_byte = MSB; + return (uint8_t)latched_count; + break; + case MSB: + read_byte = LSB; + latch_on = false; + return latched_count >> 8; + break; + default: + panic("Shouldn't be here"); + } + } else { + switch (read_byte) { + case LSB: + read_byte = MSB; + return (uint8_t)count; + break; + case MSB: + read_byte = LSB; + return count >> 8; + break; + default: + panic("Shouldn't be here"); + } + } +} + +void +Intel8254Timer::Counter::write(const uint8_t data) +{ + switch (write_byte) { + case LSB: + count = (count & 0xFF00) | data; + + if (event.scheduled()) + event.deschedule(); + output_high = false; + write_byte = MSB; + break; + + case MSB: + count = (count & 0x00FF) | (data << 8); + period = count; + + if (period > 0) { + DPRINTF(Intel8254Timer, "Timer set to curTick + %d\n", + count * event.interval); + event.schedule(curTick + count * event.interval); + } + write_byte = LSB; + break; + } +} + +void +Intel8254Timer::Counter::setRW(int rw_val) +{ + if (rw_val != TwoPhase) + panic("Only LSB/MSB read/write is implemented.\n"); +} + +void +Intel8254Timer::Counter::setMode(int mode_val) +{ + if(mode_val != InitTc && mode_val != RateGen && + mode_val != SquareWave) + panic("PIT mode %#x is not implemented: \n", mode_val); + + mode = mode_val; +} + +void +Intel8254Timer::Counter::setBCD(int bcd_val) +{ + if (bcd_val) + panic("PITimer does not implement BCD counts.\n"); +} + +bool +Intel8254Timer::Counter::outputHigh() +{ + return output_high; +} + +void +Intel8254Timer::Counter::serialize(const string &base, ostream &os) +{ + paramOut(os, base + ".count", count); + paramOut(os, base + ".latched_count", latched_count); + paramOut(os, base + ".period", period); + paramOut(os, base + ".mode", mode); + paramOut(os, base + ".output_high", output_high); + paramOut(os, base + ".latch_on", latch_on); + paramOut(os, base + ".read_byte", read_byte); + paramOut(os, base + ".write_byte", write_byte); + + Tick event_tick = 0; + if (event.scheduled()) + event_tick = event.when(); + paramOut(os, base + ".event_tick", event_tick); +} + +void +Intel8254Timer::Counter::unserialize(const string &base, Checkpoint *cp, + const string §ion) +{ + paramIn(cp, section, base + ".count", count); + paramIn(cp, section, base + ".latched_count", latched_count); + paramIn(cp, section, base + ".period", period); + paramIn(cp, section, base + ".mode", mode); + paramIn(cp, section, base + ".output_high", output_high); + paramIn(cp, section, base + ".latch_on", latch_on); + paramIn(cp, section, base + ".read_byte", read_byte); + paramIn(cp, section, base + ".write_byte", write_byte); + + Tick event_tick; + paramIn(cp, section, base + ".event_tick", event_tick); + if (event_tick) + event.schedule(event_tick); +} + +Intel8254Timer::Counter::CounterEvent::CounterEvent(Counter* c_ptr) + : Event(&mainEventQueue) +{ + interval = (Tick)(Clock::Float::s / 1193180.0); + counter = c_ptr; +} + +void +Intel8254Timer::Counter::CounterEvent::process() +{ + DPRINTF(Intel8254Timer, "Timer Interrupt\n"); + switch (counter->mode) { + case InitTc: + counter->output_high = true; + case RateGen: + case SquareWave: + break; + default: + panic("Unimplemented PITimer mode.\n"); + } +} + +const char * +Intel8254Timer::Counter::CounterEvent::description() const +{ + return "tsunami 8254 Interval timer"; +} diff --git a/src/dev/intel_8254_timer.hh b/src/dev/intel_8254_timer.hh new file mode 100644 index 000000000..c7c2b1591 --- /dev/null +++ b/src/dev/intel_8254_timer.hh @@ -0,0 +1,206 @@ +/* + * Copyright (c) 2004, 2005 + * The Regents of The University of Michigan + * All Rights Reserved + * + * This code is part of the M5 simulator. + * + * Permission is granted to use, copy, create derivative works and + * redistribute this software and such derivative works for any + * purpose, so long as the copyright notice above, this grant of + * permission, and the disclaimer below appear in all copies made; and + * so long as the name of The University of Michigan is not used in + * any advertising or publicity pertaining to the use or distribution + * of this software without specific, written prior authorization. + * + * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE + * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND + * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER + * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE + * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT, + * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM + * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN + * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGES. + * + * Authors: Ali G. Saidi + * Andrew L. Schultz + * Miguel J. Serrano + */ + +#ifndef __DEV_8254_HH__ +#define __DEV_8254_HH__ + +#include "base/bitunion.hh" +#include "sim/eventq.hh" +#include "sim/host.hh" +#include "sim/serialize.hh" + +#include +#include + +/** Programmable Interval Timer (Intel 8254) */ +class Intel8254Timer +{ + BitUnion8(CtrlReg) + Bitfield<7, 6> sel; + Bitfield<5, 4> rw; + Bitfield<3, 1> mode; + Bitfield<0> bcd; + EndBitUnion(CtrlReg) + + enum SelectVal { + SelectCounter0, + SelectCounter1, + SelectCounter2, + ReadBackCommand + }; + + enum ReadWriteVal { + LatchCommand, + LsbOnly, + MsbOnly, + TwoPhase + }; + + enum ModeVal { + InitTc, + OneShot, + RateGen, + SquareWave, + SoftwareStrobe, + HardwareStrobe + }; + + /** Counter element for PIT */ + class Counter + { + /** Event for counter interrupt */ + class CounterEvent : public Event + { + private: + /** Pointer back to Counter */ + Counter* counter; + Tick interval; + + public: + CounterEvent(Counter*); + + /** Event process */ + virtual void process(); + + /** Event description */ + virtual const char *description() const; + + friend class Counter; + }; + + private: + std::string _name; + const std::string &name() const { return _name; } + + CounterEvent event; + + /** Current count value */ + uint16_t count; + + /** Latched count */ + uint16_t latched_count; + + /** Interrupt period */ + uint16_t period; + + /** Current mode of operation */ + uint8_t mode; + + /** Output goes high when the counter reaches zero */ + bool output_high; + + /** State of the count latch */ + bool latch_on; + + /** Set of values for read_byte and write_byte */ + enum {LSB, MSB}; + + /** Determine which byte of a 16-bit count value to read/write */ + uint8_t read_byte, write_byte; + + public: + Counter(const std::string &name); + + /** Latch the current count (if one is not already latched) */ + void latchCount(); + + /** Set the read/write mode */ + void setRW(int rw_val); + + /** Set operational mode */ + void setMode(int mode_val); + + /** Set count encoding */ + void setBCD(int bcd_val); + + /** Read a count byte */ + uint8_t read(); + + /** Write a count byte */ + void write(const uint8_t data); + + /** Is the output high? */ + bool outputHigh(); + + /** + * Serialize this object to the given output stream. + * @param base The base name of the counter object. + * @param os The stream to serialize to. + */ + void serialize(const std::string &base, std::ostream &os); + + /** + * Reconstruct the state of this object from a checkpoint. + * @param base The base name of the counter object. + * @param cp The checkpoint use. + * @param section The section name of this object + */ + void unserialize(const std::string &base, Checkpoint *cp, + const std::string §ion); + }; + + private: + std::string _name; + const std::string &name() const { return _name; } + + /** PIT has three seperate counters */ + Counter *counter[3]; + + public: + /** Public way to access individual counters (avoid array accesses) */ + Counter counter0; + Counter counter1; + Counter counter2; + + Intel8254Timer(const std::string &name); + + /** Write control word */ + void writeControl(const CtrlReg data); + + /** + * Serialize this object to the given output stream. + * @param base The base name of the counter object. + * @param os The stream to serialize to. + */ + void serialize(const std::string &base, std::ostream &os); + + /** + * Reconstruct the state of this object from a checkpoint. + * @param base The base name of the counter object. + * @param cp The checkpoint use. + * @param section The section name of this object + */ + void unserialize(const std::string &base, Checkpoint *cp, + const std::string §ion); +}; + +#endif // __DEV_8254_HH__ diff --git a/src/dev/pitreg.h b/src/dev/pitreg.h deleted file mode 100644 index d42925a41..000000000 --- a/src/dev/pitreg.h +++ /dev/null @@ -1,75 +0,0 @@ -/* - * Copyright (c) 2001-2005 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: Miguel Serrano - */ - -/* @file - * Device register definitions for a device's PCI config space - */ - -#ifndef __PITREG_H__ -#define __PITREG_H__ - -#include - -// Control Word Format - -#define PIT_SEL_SHFT 0x6 -#define PIT_RW_SHFT 0x4 -#define PIT_MODE_SHFT 0x1 -#define PIT_BCD_SHFT 0x0 - -#define PIT_SEL_MASK 0x3 -#define PIT_RW_MASK 0x3 -#define PIT_MODE_MASK 0x7 -#define PIT_BCD_MASK 0x1 - -#define GET_CTRL_FIELD(x, s, m) (((x) >> s) & m) -#define GET_CTRL_SEL(x) GET_CTRL_FIELD(x, PIT_SEL_SHFT, PIT_SEL_MASK) -#define GET_CTRL_RW(x) GET_CTRL_FIELD(x, PIT_RW_SHFT, PIT_RW_MASK) -#define GET_CTRL_MODE(x) GET_CTRL_FIELD(x, PIT_MODE_SHFT, PIT_MODE_MASK) -#define GET_CTRL_BCD(x) GET_CTRL_FIELD(x, PIT_BCD_SHFT, PIT_BCD_MASK) - -#define PIT_READ_BACK 0x3 - -#define PIT_RW_LATCH_COMMAND 0x0 -#define PIT_RW_LSB_ONLY 0x1 -#define PIT_RW_MSB_ONLY 0x2 -#define PIT_RW_16BIT 0x3 - -#define PIT_MODE_INTTC 0x0 -#define PIT_MODE_ONESHOT 0x1 -#define PIT_MODE_RATEGEN 0x2 -#define PIT_MODE_SQWAVE 0x3 -#define PIT_MODE_SWSTROBE 0x4 -#define PIT_MODE_HWSTROBE 0x5 - -#define PIT_BCD_FALSE 0x0 -#define PIT_BCD_TRUE 0x1 - -#endif // __PITREG_H__ diff --git a/src/dev/x86/south_bridge/i8254.cc b/src/dev/x86/south_bridge/i8254.cc index fb6723a51..7c3501c37 100644 --- a/src/dev/x86/south_bridge/i8254.cc +++ b/src/dev/x86/south_bridge/i8254.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004-2005 The Regents of The University of Michigan + * Copyright (c) 2008 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -38,21 +38,21 @@ X86ISA::I8254::read(PacketPtr pkt) switch(pkt->getAddr() - addrRange.start) { case 0x0: - warn("Reading from timer 0 counter.\n"); + pkt->set(pit.counter0.read()); break; case 0x1: - warn("Reading from timer 1 counter.\n"); + pkt->set(pit.counter1.read()); break; case 0x2: - warn("Reading from timer 2 counter.\n"); + pkt->set(pit.counter2.read()); break; case 0x3: - fatal("Reading from timer control word which is read only.\n"); + pkt->set(uint8_t(-1)); break; default: panic("Read from undefined i8254 register.\n"); } - return SubDevice::read(pkt); + return latency; } Tick @@ -62,25 +62,19 @@ X86ISA::I8254::write(PacketPtr pkt) switch(pkt->getAddr() - addrRange.start) { case 0x0: - warn("Writing to timer 0 counter.\n"); + pit.counter0.write(pkt->get()); break; case 0x1: - warn("Writing to timer 1 counter.\n"); + pit.counter1.write(pkt->get()); break; case 0x2: - warn("Writing to timer 2 counter.\n"); + pit.counter2.write(pkt->get()); break; case 0x3: - processControlWord(pkt->get()); - return latency; + pit.writeControl(pkt->get()); + break; default: panic("Write to undefined i8254 register.\n"); } - return SubDevice::write(pkt); -} - -void -X86ISA::I8254::processControlWord(uint8_t word) -{ - warn("I8254 received control word %x.\n", word); + return latency; } diff --git a/src/dev/x86/south_bridge/i8254.hh b/src/dev/x86/south_bridge/i8254.hh index f246fd8e4..519049e93 100644 --- a/src/dev/x86/south_bridge/i8254.hh +++ b/src/dev/x86/south_bridge/i8254.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004-2005 The Regents of The University of Michigan + * Copyright (c) 2008 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -33,24 +33,28 @@ #include "arch/x86/x86_traits.hh" #include "base/range.hh" +#include "dev/intel_8254_timer.hh" #include "dev/x86/south_bridge/sub_device.hh" +#include + namespace X86ISA { class I8254 : public SubDevice { protected: - void processControlWord(uint8_t word); + Intel8254Timer pit; public: - I8254() + I8254(const std::string &name) : pit(name) {} - I8254(Tick _latency) : SubDevice(_latency) + I8254(const std::string &name, Tick _latency) : + SubDevice(_latency), pit(name) {} - I8254(Addr start, Addr size, Tick _latency) : - SubDevice(start, size, _latency) + I8254(const std::string &name, Addr start, Addr size, Tick _latency) : + SubDevice(start, size, _latency), pit(name) {} Tick read(PacketPtr pkt); diff --git a/src/dev/x86/south_bridge/south_bridge.cc b/src/dev/x86/south_bridge/south_bridge.cc index f25b3b811..cc20ea09e 100644 --- a/src/dev/x86/south_bridge/south_bridge.cc +++ b/src/dev/x86/south_bridge/south_bridge.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004-2005 The Regents of The University of Michigan + * Copyright (c) 2008 The Regents of The University of Michigan * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -68,7 +68,7 @@ SouthBridge::write(PacketPtr pkt) SouthBridge::SouthBridge(const Params *p) : PioDevice(p), pic1(0x20, 2, p->pio_latency), pic2(0xA0, 2, p->pio_latency), - pit(0x40, 4, p->pio_latency), + pit(p->name + ".pit", 0x40, 4, p->pio_latency), cmos(0x70, 2, p->pio_latency), speaker(0x61, 1, p->pio_latency) {