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-/*
- * Copyright (c) 2004-2005 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.
- */
-
-/** @file
- * Tsunami I/O including PIC, PIT, RTC, DMA
- */
-
-#include <sys/time.h>
-
-#include <deque>
-#include <string>
-#include <vector>
-
-#include "base/trace.hh"
-#include "dev/pitreg.h"
-#include "dev/rtcreg.h"
-#include "dev/tsunami_cchip.hh"
-#include "dev/tsunami.hh"
-#include "dev/tsunami_io.hh"
-#include "dev/tsunamireg.h"
-#include "mem/port.hh"
-#include "sim/builder.hh"
-#include "sim/system.hh"
-
-using namespace std;
-//Should this be AlphaISA?
-using namespace TheISA;
-
-TsunamiIO::RTC::RTC(const string &name, Tsunami* t, Tick i)
- : _name(name), event(t, i), addr(0)
-{
- memset(clock_data, 0, sizeof(clock_data));
- stat_regA = RTCA_32768HZ | RTCA_1024HZ;
- stat_regB = RTCB_PRDC_IE |RTCB_BIN | RTCB_24HR;
-}
-
-void
-TsunamiIO::RTC::set_time(time_t t)
-{
- struct tm tm;
- gmtime_r(&t, &tm);
-
- sec = tm.tm_sec;
- min = tm.tm_min;
- hour = tm.tm_hour;
- wday = tm.tm_wday + 1;
- mday = tm.tm_mday;
- mon = tm.tm_mon + 1;
- year = tm.tm_year;
-
- DPRINTFN("Real-time clock set to %s", asctime(&tm));
-}
-
-void
-TsunamiIO::RTC::writeAddr(const uint8_t data)
-{
- if (data <= RTC_STAT_REGD)
- addr = data;
- else
- panic("RTC addresses over 0xD are not implemented.\n");
-}
-
-void
-TsunamiIO::RTC::writeData(const uint8_t data)
-{
- if (addr < RTC_STAT_REGA)
- clock_data[addr] = data;
- else {
- switch (addr) {
- case RTC_STAT_REGA:
- if (data != (RTCA_32768HZ | RTCA_1024HZ))
- panic("Unimplemented RTC register A value write!\n");
- stat_regA = data;
- break;
- case RTC_STAT_REGB:
- if ((data & ~(RTCB_PRDC_IE | RTCB_SQWE)) != (RTCB_BIN | RTCB_24HR))
- panic("Write to RTC reg B bits that are not implemented!\n");
-
- if (data & RTCB_PRDC_IE) {
- if (!event.scheduled())
- event.scheduleIntr();
- } else {
- if (event.scheduled())
- event.deschedule();
- }
- stat_regB = data;
- break;
- case RTC_STAT_REGC:
- case RTC_STAT_REGD:
- panic("RTC status registers C and D are not implemented.\n");
- break;
- }
- }
-}
-
-void
-TsunamiIO::RTC::readData(uint8_t *data)
-{
- if (addr < RTC_STAT_REGA)
- *data = clock_data[addr];
- else {
- switch (addr) {
- case RTC_STAT_REGA:
- // toggle UIP bit for linux
- stat_regA ^= RTCA_UIP;
- *data = stat_regA;
- break;
- case RTC_STAT_REGB:
- *data = stat_regB;
- break;
- case RTC_STAT_REGC:
- case RTC_STAT_REGD:
- *data = 0x00;
- break;
- }
- }
-}
-
-void
-TsunamiIO::RTC::serialize(const string &base, ostream &os)
-{
- paramOut(os, base + ".addr", addr);
- arrayParamOut(os, base + ".clock_data", clock_data, sizeof(clock_data));
- paramOut(os, base + ".stat_regA", stat_regA);
- paramOut(os, base + ".stat_regB", stat_regB);
-}
-
-void
-TsunamiIO::RTC::unserialize(const string &base, Checkpoint *cp,
- const string &section)
-{
- paramIn(cp, section, base + ".addr", addr);
- arrayParamIn(cp, section, base + ".clock_data", clock_data,
- sizeof(clock_data));
- paramIn(cp, section, base + ".stat_regA", stat_regA);
- paramIn(cp, section, base + ".stat_regB", stat_regB);
-
- // We're not unserializing the event here, but we need to
- // rescehedule the event since curTick was moved forward by the
- // checkpoint
- event.reschedule(curTick + event.interval);
-}
-
-TsunamiIO::RTC::RTCEvent::RTCEvent(Tsunami*t, Tick i)
- : Event(&mainEventQueue), tsunami(t), interval(i)
-{
- DPRINTF(MC146818, "RTC Event Initilizing\n");
- schedule(curTick + interval);
-}
-
-void
-TsunamiIO::RTC::RTCEvent::scheduleIntr()
-{
- schedule(curTick + interval);
-}
-
-void
-TsunamiIO::RTC::RTCEvent::process()
-{
- DPRINTF(MC146818, "RTC Timer Interrupt\n");
- schedule(curTick + interval);
- //Actually interrupt the processor here
- tsunami->cchip->postRTC();
-}
-
-const char *
-TsunamiIO::RTC::RTCEvent::description()
-{
- return "tsunami RTC interrupt";
-}
-
-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 &section)
-{
- // 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;
- }
-}
-
-void
-TsunamiIO::PITimer::Counter::read(uint8_t *data)
-{
- if (latch_on) {
- switch (read_byte) {
- case LSB:
- read_byte = MSB;
- *data = (uint8_t)latched_count;
- break;
- case MSB:
- read_byte = LSB;
- latch_on = false;
- *data = latched_count >> 8;
- break;
- }
- } else {
- switch (read_byte) {
- case LSB:
- read_byte = MSB;
- *data = (uint8_t)count;
- break;
- case MSB:
- read_byte = LSB;
- *data = count >> 8;
- break;
- }
- }
-}
-
-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 &section)
-{
- 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()
-{
- return "tsunami 8254 Interval timer";
-}
-
-TsunamiIO::TsunamiIO(Params *p)
- : BasicPioDevice(p), tsunami(p->tsunami), pitimer(p->name + "pitimer"),
- rtc(p->name + ".rtc", p->tsunami, p->frequency)
-{
- pioSize = 0xff;
-
- // set the back pointer from tsunami to myself
- tsunami->io = this;
-
- timerData = 0;
- rtc.set_time(p->init_time == 0 ? time(NULL) : p->init_time);
- picr = 0;
- picInterrupting = false;
-}
-
-Tick
-TsunamiIO::frequency() const
-{
- return Clock::Frequency / params()->frequency;
-}
-
-Tick
-TsunamiIO::read(Packet *pkt)
-{
- assert(pkt->result == Unknown);
- assert(pkt->addr >= pioAddr && pkt->addr < pioAddr + pioSize);
-
- pkt->time += pioDelay;
- Addr daddr = pkt->addr - pioAddr;
-
- DPRINTF(Tsunami, "io read va=%#x size=%d IOPorrt=%#x\n", pkt->addr,
- pkt->size, daddr);
-
- pkt->allocate();
-
- if (pkt->size == sizeof(uint8_t)) {
- switch(daddr) {
- // PIC1 mask read
- case TSDEV_PIC1_MASK:
- pkt->set(~mask1);
- break;
- case TSDEV_PIC2_MASK:
- pkt->set(~mask2);
- break;
- case TSDEV_PIC1_ISR:
- // !!! If this is modified 64bit case needs to be too
- // Pal code has to do a 64 bit physical read because there is
- // no load physical byte instruction
- pkt->set(picr);
- break;
- case TSDEV_PIC2_ISR:
- // PIC2 not implemnted... just return 0
- pkt->set(0x00);
- break;
- case TSDEV_TMR0_DATA:
- pitimer.counter0.read(pkt->getPtr<uint8_t>());
- break;
- case TSDEV_TMR1_DATA:
- pitimer.counter1.read(pkt->getPtr<uint8_t>());
- break;
- case TSDEV_TMR2_DATA:
- pitimer.counter2.read(pkt->getPtr<uint8_t>());
- break;
- case TSDEV_RTC_DATA:
- rtc.readData(pkt->getPtr<uint8_t>());
- break;
- case TSDEV_CTRL_PORTB:
- if (pitimer.counter2.outputHigh())
- pkt->set(PORTB_SPKR_HIGH);
- else
- pkt->set(0x00);
- break;
- default:
- panic("I/O Read - va%#x size %d\n", pkt->addr, pkt->size);
- }
- } else if (pkt->size == sizeof(uint64_t)) {
- if (daddr == TSDEV_PIC1_ISR)
- pkt->set<uint64_t>(picr);
- else
- panic("I/O Read - invalid addr - va %#x size %d\n",
- pkt->addr, pkt->size);
- } else {
- panic("I/O Read - invalid size - va %#x size %d\n", pkt->addr, pkt->size);
- }
- pkt->result = Success;
- return pioDelay;
-}
-
-Tick
-TsunamiIO::write(Packet *pkt)
-{
- pkt->time += pioDelay;
-
- assert(pkt->result == Unknown);
- assert(pkt->addr >= pioAddr && pkt->addr < pioAddr + pioSize);
- Addr daddr = pkt->addr - pioAddr;
-
- DPRINTF(Tsunami, "io write - va=%#x size=%d IOPort=%#x Data=%#x\n",
- pkt->addr, pkt->size, pkt->addr & 0xfff, (uint32_t)pkt->get<uint8_t>());
-
- assert(pkt->size == sizeof(uint8_t));
-
- switch(daddr) {
- case TSDEV_PIC1_MASK:
- mask1 = ~(pkt->get<uint8_t>());
- if ((picr & mask1) && !picInterrupting) {
- picInterrupting = true;
- tsunami->cchip->postDRIR(55);
- DPRINTF(Tsunami, "posting pic interrupt to cchip\n");
- }
- if ((!(picr & mask1)) && picInterrupting) {
- picInterrupting = false;
- tsunami->cchip->clearDRIR(55);
- DPRINTF(Tsunami, "clearing pic interrupt\n");
- }
- break;
- case TSDEV_PIC2_MASK:
- mask2 = pkt->get<uint8_t>();
- //PIC2 Not implemented to interrupt
- break;
- case TSDEV_PIC1_ACK:
- // clear the interrupt on the PIC
- picr &= ~(1 << (pkt->get<uint8_t>() & 0xF));
- if (!(picr & mask1))
- tsunami->cchip->clearDRIR(55);
- break;
- case TSDEV_DMA1_MODE:
- mode1 = pkt->get<uint8_t>();
- break;
- case TSDEV_DMA2_MODE:
- mode2 = pkt->get<uint8_t>();
- break;
- case TSDEV_TMR0_DATA:
- pitimer.counter0.write(pkt->get<uint8_t>());
- break;
- case TSDEV_TMR1_DATA:
- pitimer.counter1.write(pkt->get<uint8_t>());
- break;
- case TSDEV_TMR2_DATA:
- pitimer.counter2.write(pkt->get<uint8_t>());
- break;
- case TSDEV_TMR_CTRL:
- pitimer.writeControl(pkt->get<uint8_t>());
- break;
- case TSDEV_RTC_ADDR:
- rtc.writeAddr(pkt->get<uint8_t>());
- break;
- case TSDEV_RTC_DATA:
- rtc.writeData(pkt->get<uint8_t>());
- break;
- case TSDEV_KBD:
- case TSDEV_DMA1_CMND:
- case TSDEV_DMA2_CMND:
- case TSDEV_DMA1_MMASK:
- case TSDEV_DMA2_MMASK:
- case TSDEV_PIC2_ACK:
- case TSDEV_DMA1_RESET:
- case TSDEV_DMA2_RESET:
- case TSDEV_DMA1_MASK:
- case TSDEV_DMA2_MASK:
- case TSDEV_CTRL_PORTB:
- break;
- default:
- panic("I/O Write - va%#x size %d data %#x\n", pkt->addr, pkt->size, pkt->get<uint8_t>());
- }
-
- pkt->result = Success;
- return pioDelay;
-}
-
-void
-TsunamiIO::postPIC(uint8_t bitvector)
-{
- //PIC2 Is not implemented, because nothing of interest there
- picr |= bitvector;
- if (picr & mask1) {
- tsunami->cchip->postDRIR(55);
- DPRINTF(Tsunami, "posting pic interrupt to cchip\n");
- }
-}
-
-void
-TsunamiIO::clearPIC(uint8_t bitvector)
-{
- //PIC2 Is not implemented, because nothing of interest there
- picr &= ~bitvector;
- if (!(picr & mask1)) {
- tsunami->cchip->clearDRIR(55);
- DPRINTF(Tsunami, "clearing pic interrupt to cchip\n");
- }
-}
-
-void
-TsunamiIO::serialize(ostream &os)
-{
- SERIALIZE_SCALAR(timerData);
- SERIALIZE_SCALAR(mask1);
- SERIALIZE_SCALAR(mask2);
- SERIALIZE_SCALAR(mode1);
- SERIALIZE_SCALAR(mode2);
- SERIALIZE_SCALAR(picr);
- SERIALIZE_SCALAR(picInterrupting);
-
- // Serialize the timers
- pitimer.serialize("pitimer", os);
- rtc.serialize("rtc", os);
-}
-
-void
-TsunamiIO::unserialize(Checkpoint *cp, const string &section)
-{
- UNSERIALIZE_SCALAR(timerData);
- UNSERIALIZE_SCALAR(mask1);
- UNSERIALIZE_SCALAR(mask2);
- UNSERIALIZE_SCALAR(mode1);
- UNSERIALIZE_SCALAR(mode2);
- UNSERIALIZE_SCALAR(picr);
- UNSERIALIZE_SCALAR(picInterrupting);
-
- // Unserialize the timers
- pitimer.unserialize("pitimer", cp, section);
- rtc.unserialize("rtc", cp, section);
-}
-
-BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
-
- Param<Addr> pio_addr;
- Param<Tick> pio_latency;
- Param<Tick> frequency;
- SimObjectParam<Platform *> platform;
- SimObjectParam<System *> system;
- Param<time_t> time;
- SimObjectParam<Tsunami *> tsunami;
-
-END_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO)
-
-BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
-
- INIT_PARAM(pio_addr, "Device Address"),
- INIT_PARAM(pio_latency, "Programmed IO latency"),
- INIT_PARAM(frequency, "clock interrupt frequency"),
- INIT_PARAM(platform, "platform"),
- INIT_PARAM(system, "system object"),
- INIT_PARAM(time, "System time to use (0 for actual time"),
- INIT_PARAM(tsunami, "Tsunami")
-
-END_INIT_SIM_OBJECT_PARAMS(TsunamiIO)
-
-CREATE_SIM_OBJECT(TsunamiIO)
-{
- TsunamiIO::Params *p = new TsunamiIO::Params;
- p->frequency = frequency;
- p->name = getInstanceName();
- p->pio_addr = pio_addr;
- p->pio_delay = pio_latency;
- p->platform = platform;
- p->system = system;
- p->init_time = time;
- p->tsunami = tsunami;
- return new TsunamiIO(p);
-}
-
-REGISTER_SIM_OBJECT("TsunamiIO", TsunamiIO)
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-20 20:47:17 +0000