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-rw-r--r--dev/tsunami_io.cc515
1 files changed, 373 insertions, 142 deletions
diff --git a/dev/tsunami_io.cc b/dev/tsunami_io.cc
index da1062237..569bb46cb 100644
--- a/dev/tsunami_io.cc
+++ b/dev/tsunami_io.cc
@@ -39,6 +39,7 @@
#include "base/trace.hh"
#include "dev/tsunami_io.hh"
#include "dev/tsunami.hh"
+#include "dev/pitreg.h"
#include "mem/bus/bus.hh"
#include "mem/bus/pio_interface.hh"
#include "mem/bus/pio_interface_impl.hh"
@@ -50,10 +51,122 @@
using namespace std;
-#define UNIX_YEAR_OFFSET 52
+TsunamiIO::RTC::RTC(Tsunami* t, Tick i)
+ : SimObject("RTC"), 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(std::ostream &os)
+{
+ SERIALIZE_SCALAR(addr);
+ SERIALIZE_ARRAY(clock_data, sizeof(clock_data));
+ SERIALIZE_SCALAR(stat_regA);
+ SERIALIZE_SCALAR(stat_regB);
+
+ // serialize the RTC event
+ nameOut(os, csprintf("%s.event", name()));
+ event.serialize(os);
+}
+
+void
+TsunamiIO::RTC::unserialize(Checkpoint *cp, const std::string &section)
+{
+ UNSERIALIZE_SCALAR(addr);
+ UNSERIALIZE_ARRAY(clock_data, sizeof(clock_data));
+ UNSERIALIZE_SCALAR(stat_regA);
+ UNSERIALIZE_SCALAR(stat_regB);
+
+ // unserialze the event
+ event.unserialize(cp, csprintf("%s.event", section));
+}
-// Timer Event for Periodic interrupt of RTC
-TsunamiIO::RTCEvent::RTCEvent(Tsunami* t, Tick i)
+TsunamiIO::RTC::RTCEvent::RTCEvent(Tsunami*t, Tick i)
: Event(&mainEventQueue), tsunami(t), interval(i)
{
DPRINTF(MC146818, "RTC Event Initilizing\n");
@@ -61,7 +174,13 @@ TsunamiIO::RTCEvent::RTCEvent(Tsunami* t, Tick i)
}
void
-TsunamiIO::RTCEvent::process()
+TsunamiIO::RTC::RTCEvent::scheduleIntr()
+{
+ schedule(curTick + interval);
+}
+
+void
+TsunamiIO::RTC::RTCEvent::process()
{
DPRINTF(MC146818, "RTC Timer Interrupt\n");
schedule(curTick + interval);
@@ -70,95 +189,256 @@ TsunamiIO::RTCEvent::process()
}
const char *
-TsunamiIO::RTCEvent::description()
+TsunamiIO::RTC::RTCEvent::description()
{
return "tsunami RTC interrupt";
}
void
-TsunamiIO::RTCEvent::serialize(std::ostream &os)
+TsunamiIO::RTC::RTCEvent::serialize(std::ostream &os)
{
Tick time = when();
SERIALIZE_SCALAR(time);
}
void
-TsunamiIO::RTCEvent::unserialize(Checkpoint *cp, const std::string &section)
+TsunamiIO::RTC::RTCEvent::unserialize(Checkpoint *cp, const std::string &section)
{
Tick time;
UNSERIALIZE_SCALAR(time);
reschedule(time);
}
+TsunamiIO::PITimer::PITimer()
+ : SimObject("PITimer"), counter0(counter[0]), counter1(counter[1]),
+ counter2(counter[2])
+{
-// Timer Event for PIT Timers
-TsunamiIO::ClockEvent::ClockEvent()
- : Event(&mainEventQueue)
+}
+
+void
+TsunamiIO::PITimer::writeControl(const uint8_t *data)
{
- /* This is the PIT Tick Rate. A constant for the 8254 timer. The
- * Tsunami platform has one of these cycle counters on the Cypress
- * South Bridge and it is used by linux for estimating the cycle
- * frequency of the machine it is running on. --Ali
- */
- interval = (Tick)(Clock::Float::s / 1193180.0);
+ int rw;
+ int sel;
+
+ sel = GET_CTRL_SEL(*data);
+
+ if (sel == PIT_READ_BACK)
+ panic("PITimer Read-Back Command is not implemented.\n");
- DPRINTF(Tsunami, "Clock Event Initilizing\n");
- mode = 0;
+ 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::ClockEvent::process()
+TsunamiIO::PITimer::serialize(std::ostream &os)
{
- DPRINTF(Tsunami, "Timer Interrupt\n");
- if (mode == 0)
- status = 0x20; // set bit that linux is looking for
- else
- schedule(curTick + interval);
+ // serialize the counters
+ nameOut(os, csprintf("%s.counter0", name()));
+ counter0.serialize(os);
+
+ nameOut(os, csprintf("%s.counter1", name()));
+ counter1.serialize(os);
+
+ nameOut(os, csprintf("%s.counter2", name()));
+ counter2.serialize(os);
}
void
-TsunamiIO::ClockEvent::Program(int count)
+TsunamiIO::PITimer::unserialize(Checkpoint *cp, const std::string &section)
{
- DPRINTF(Tsunami, "Timer set to curTick + %d\n", count * interval);
- schedule(curTick + count * interval);
- status = 0;
+ // unserialze the counters
+ counter0.unserialize(cp, csprintf("%s.counter0", section));
+ counter1.unserialize(cp, csprintf("%s.counter1", section));
+ counter2.unserialize(cp, csprintf("%s.counter2", section));
}
-const char *
-TsunamiIO::ClockEvent::description()
+TsunamiIO::PITimer::Counter::Counter()
+ : SimObject("Counter"), event(this), count(0), latched_count(0), period(0),
+ mode(0), output_high(false), latch_on(false), read_byte(LSB),
+ write_byte(LSB)
{
- return "tsunami 8254 Interval timer";
+
+}
+
+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::ClockEvent::ChangeMode(uint8_t md)
+TsunamiIO::PITimer::Counter::serialize(std::ostream &os)
{
- mode = md;
+ SERIALIZE_SCALAR(count);
+ SERIALIZE_SCALAR(latched_count);
+ SERIALIZE_SCALAR(period);
+ SERIALIZE_SCALAR(mode);
+ SERIALIZE_SCALAR(output_high);
+ SERIALIZE_SCALAR(latch_on);
+ SERIALIZE_SCALAR(read_byte);
+ SERIALIZE_SCALAR(write_byte);
+
+ // serialize the counter event
+ nameOut(os, csprintf("%s.event", name()));
+ event.serialize(os);
+}
+
+void
+TsunamiIO::PITimer::Counter::unserialize(Checkpoint *cp, const std::string &section)
+{
+ UNSERIALIZE_SCALAR(count);
+ UNSERIALIZE_SCALAR(latched_count);
+ UNSERIALIZE_SCALAR(period);
+ UNSERIALIZE_SCALAR(mode);
+ UNSERIALIZE_SCALAR(output_high);
+ UNSERIALIZE_SCALAR(latch_on);
+ UNSERIALIZE_SCALAR(read_byte);
+ UNSERIALIZE_SCALAR(write_byte);
+
+ // unserialze the counter event
+ event.unserialize(cp, csprintf("%s.event", section));
+}
+
+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");
+ }
}
-uint8_t
-TsunamiIO::ClockEvent::Status()
+const char *
+TsunamiIO::PITimer::Counter::CounterEvent::description()
{
- return status;
+ return "tsunami 8254 Interval timer";
}
void
-TsunamiIO::ClockEvent::serialize(std::ostream &os)
+TsunamiIO::PITimer::Counter::CounterEvent::serialize(std::ostream &os)
{
Tick time = scheduled() ? when() : 0;
SERIALIZE_SCALAR(time);
- SERIALIZE_SCALAR(status);
- SERIALIZE_SCALAR(mode);
SERIALIZE_SCALAR(interval);
}
void
-TsunamiIO::ClockEvent::unserialize(Checkpoint *cp, const std::string &section)
+TsunamiIO::PITimer::Counter::CounterEvent::unserialize(Checkpoint *cp, const std::string &section)
{
Tick time;
UNSERIALIZE_SCALAR(time);
- UNSERIALIZE_SCALAR(status);
- UNSERIALIZE_SCALAR(mode);
UNSERIALIZE_SCALAR(interval);
if (time)
schedule(time);
@@ -182,8 +462,7 @@ TsunamiIO::TsunamiIO(const string &name, Tsunami *t, time_t init_time,
tsunami->io = this;
timerData = 0;
- set_time(init_time == 0 ? time(NULL) : init_time);
- uip = 1;
+ rtc.set_time(init_time == 0 ? time(NULL) : init_time);
picr = 0;
picInterrupting = false;
}
@@ -194,13 +473,6 @@ TsunamiIO::frequency() const
return Clock::Frequency / clockInterval;
}
-void
-TsunamiIO::set_time(time_t t)
-{
- gmtime_r(&t, &tm);
- DPRINTFN("Real-time clock set to %s", asctime(&tm));
-}
-
Fault
TsunamiIO::read(MemReqPtr &req, uint8_t *data)
{
@@ -213,6 +485,13 @@ TsunamiIO::read(MemReqPtr &req, uint8_t *data)
switch(req->size) {
case sizeof(uint8_t):
switch(daddr) {
+ // PIC1 mask read
+ case TSDEV_PIC1_MASK:
+ *(uint8_t*)data = ~mask1;
+ return No_Fault;
+ case TSDEV_PIC2_MASK:
+ *(uint8_t*)data = ~mask2;
+ return No_Fault;
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
@@ -223,50 +502,24 @@ TsunamiIO::read(MemReqPtr &req, uint8_t *data)
// PIC2 not implemnted... just return 0
*(uint8_t*)data = 0x00;
return No_Fault;
- case TSDEV_TMR_CTL:
- *(uint8_t*)data = timer2.Status();
+ case TSDEV_TMR0_DATA:
+ pitimer.counter0.read(data);
+ return No_Fault;
+ case TSDEV_TMR1_DATA:
+ pitimer.counter1.read(data);
+ return No_Fault;
+ case TSDEV_TMR2_DATA:
+ pitimer.counter2.read(data);
return No_Fault;
case TSDEV_RTC_DATA:
- switch(RTCAddress) {
- case RTC_CNTRL_REGA:
- *(uint8_t*)data = uip << 7 | 0x26;
- uip = !uip;
- return No_Fault;
- case RTC_CNTRL_REGB:
- // DM and 24/12 and UIE
- *(uint8_t*)data = 0x46;
- return No_Fault;
- case RTC_CNTRL_REGC:
- // If we want to support RTC user access in linux
- // This won't work, but for now it's fine
- *(uint8_t*)data = 0x00;
- return No_Fault;
- case RTC_CNTRL_REGD:
- panic("RTC Control Register D not implemented");
- case RTC_SEC:
- *(uint8_t *)data = tm.tm_sec;
- return No_Fault;
- case RTC_MIN:
- *(uint8_t *)data = tm.tm_min;
- return No_Fault;
- case RTC_HR:
- *(uint8_t *)data = tm.tm_hour;
- return No_Fault;
- case RTC_DOW:
- *(uint8_t *)data = tm.tm_wday;
- return No_Fault;
- case RTC_DOM:
- *(uint8_t *)data = tm.tm_mday;
- case RTC_MON:
- *(uint8_t *)data = tm.tm_mon + 1;
- return No_Fault;
- case RTC_YEAR:
- *(uint8_t *)data = tm.tm_year - UNIX_YEAR_OFFSET;
- return No_Fault;
- default:
- panic("Unknown RTC Address\n");
- }
-
+ rtc.readData(data);
+ return No_Fault;
+ case TSDEV_CTRL_PORTB:
+ if (pitimer.counter2.outputHigh())
+ *data = PORTB_SPKR_HIGH;
+ else
+ *data = 0x00;
+ return No_Fault;
default:
panic("I/O Read - va%#x size %d\n", req->vaddr, req->size);
}
@@ -337,6 +590,14 @@ TsunamiIO::write(MemReqPtr &req, const uint8_t *data)
if (!(picr & mask1))
tsunami->cchip->clearDRIR(55);
return No_Fault;
+ case TSDEV_DMA1_CMND:
+ return No_Fault;
+ case TSDEV_DMA2_CMND:
+ return No_Fault;
+ case TSDEV_DMA1_MMASK:
+ return No_Fault;
+ case TSDEV_DMA2_MMASK:
+ return No_Fault;
case TSDEV_PIC2_ACK:
return No_Fault;
case TSDEV_DMA1_RESET:
@@ -352,54 +613,31 @@ TsunamiIO::write(MemReqPtr &req, const uint8_t *data)
case TSDEV_DMA1_MASK:
case TSDEV_DMA2_MASK:
return No_Fault;
- case TSDEV_TMR_CTL:
+ case TSDEV_TMR0_DATA:
+ pitimer.counter0.write(data);
return No_Fault;
- case TSDEV_TMR2_CTL:
- if ((*(uint8_t*)data & 0x30) != 0x30)
- panic("Only L/M write supported\n");
-
- switch(*(uint8_t*)data >> 6) {
- case 0:
- timer0.ChangeMode((*(uint8_t*)data & 0xF) >> 1);
- break;
- case 2:
- timer2.ChangeMode((*(uint8_t*)data & 0xF) >> 1);
- break;
- default:
- panic("Read Back Command not implemented\n");
- }
+ case TSDEV_TMR1_DATA:
+ pitimer.counter1.write(data);
return No_Fault;
case TSDEV_TMR2_DATA:
- /* two writes before we actually start the Timer
- so I set a flag in the timerData */
- if(timerData & 0x1000) {
- timerData &= 0x1000;
- timerData += *(uint8_t*)data << 8;
- timer2.Program(timerData);
- } else {
- timerData = *(uint8_t*)data;
- timerData |= 0x1000;
- }
+ pitimer.counter2.write(data);
return No_Fault;
- case TSDEV_TMR0_DATA:
- /* two writes before we actually start the Timer
- so I set a flag in the timerData */
- if(timerData & 0x1000) {
- timerData &= 0x1000;
- timerData += *(uint8_t*)data << 8;
- timer0.Program(timerData);
- } else {
- timerData = *(uint8_t*)data;
- timerData |= 0x1000;
- }
+ case TSDEV_TMR_CTRL:
+ pitimer.writeControl(data);
return No_Fault;
case TSDEV_RTC_ADDR:
- RTCAddress = *(uint8_t*)data;
+ rtc.writeAddr(data);
+ return No_Fault;
+ case TSDEV_KBD:
return No_Fault;
case TSDEV_RTC_DATA:
- panic("RTC Write not implmented (rtc.o won't work)\n");
+ rtc.writeData(data);
+ return No_Fault;
+ case TSDEV_CTRL_PORTB:
+ // System Control Port B not implemented
+ return No_Fault;
default:
- panic("I/O Write - va%#x size %d\n", req->vaddr, req->size);
+ panic("I/O Write - va%#x size %d data %#x\n", req->vaddr, req->size, (int)*data);
}
case sizeof(uint16_t):
case sizeof(uint32_t):
@@ -445,20 +683,16 @@ void
TsunamiIO::serialize(std::ostream &os)
{
SERIALIZE_SCALAR(timerData);
- SERIALIZE_SCALAR(uip);
SERIALIZE_SCALAR(mask1);
SERIALIZE_SCALAR(mask2);
SERIALIZE_SCALAR(mode1);
SERIALIZE_SCALAR(mode2);
SERIALIZE_SCALAR(picr);
SERIALIZE_SCALAR(picInterrupting);
- SERIALIZE_SCALAR(RTCAddress);
// Serialize the timers
- nameOut(os, csprintf("%s.timer0", name()));
- timer0.serialize(os);
- nameOut(os, csprintf("%s.timer2", name()));
- timer2.serialize(os);
+ nameOut(os, csprintf("%s.pitimer", name()));
+ pitimer.serialize(os);
nameOut(os, csprintf("%s.rtc", name()));
rtc.serialize(os);
}
@@ -467,18 +701,15 @@ void
TsunamiIO::unserialize(Checkpoint *cp, const std::string &section)
{
UNSERIALIZE_SCALAR(timerData);
- UNSERIALIZE_SCALAR(uip);
UNSERIALIZE_SCALAR(mask1);
UNSERIALIZE_SCALAR(mask2);
UNSERIALIZE_SCALAR(mode1);
UNSERIALIZE_SCALAR(mode2);
UNSERIALIZE_SCALAR(picr);
UNSERIALIZE_SCALAR(picInterrupting);
- UNSERIALIZE_SCALAR(RTCAddress);
// Unserialize the timers
- timer0.unserialize(cp, csprintf("%s.timer0", section));
- timer2.unserialize(cp, csprintf("%s.timer2", section));
+ pitimer.unserialize(cp, csprintf("%s.pitimer", section));
rtc.unserialize(cp, csprintf("%s.rtc", section));
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 20:54:04 +0000