Programmable Interval Timer (Intel 8254) More...

#include <intel_8254_timer.hh>

Inheritance diagram for Intel8254Timer:

Classes
class	Counter
	Counter element for PIT. More...

Public Member Functions
virtual	~Intel8254Timer ()

	Intel8254Timer (EventManager em, const std::string &name, Counter counter0, Counter counter1, Counter counter2)

	Intel8254Timer (EventManager *em, const std::string &name)

void	writeControl (const CtrlReg data)
	Write control word. More...

uint8_t	readCounter (unsigned int num)

void	writeCounter (unsigned int num, const uint8_t data)

bool	outputHigh (unsigned int num)

void	serialize (const std::string &base, CheckpointOut &cp) const
	Serialize this object to the given output stream. More...

void	unserialize (const std::string &base, CheckpointIn &cp)
	Reconstruct the state of this object from a checkpoint. More...

void	startup ()
	Start ticking. More...

Public Member Functions inherited from EventManager
EventQueue *	eventQueue () const

void	schedule (Event &event, Tick when)

void	deschedule (Event &event)

void	reschedule (Event &event, Tick when, bool always=false)

void	schedule (Event *event, Tick when)

void	deschedule (Event *event)

void	reschedule (Event *event, Tick when, bool always=false)

void	wakeupEventQueue (Tick when=(Tick) -1)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers. More...

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue. More...

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

Protected Types
enum	ReadWriteVal { LatchCommand, LsbOnly, MsbOnly, TwoPhase }

enum	ModeVal { InitTc, OneShot, RateGen, SquareWave, SoftwareStrobe, HardwareStrobe }

Protected Member Functions
	BitUnion8 (CtrlReg) Bitfield< 7

	EndBitUnion (CtrlReg) enum SelectVal

const std::string &	name () const

virtual void	counterInterrupt (unsigned int num)

Protected Attributes
	sel

Bitfield< 5, 4 >	rw

Bitfield< 3, 1 >	mode

Bitfield< 0 >	bcd

std::string	_name

Counter *	counter [3]
	PIT has three seperate counters. More...

Protected Attributes inherited from EventManager
EventQueue *	eventq
	A pointer to this object's event queue. More...

Detailed Description

Programmable Interval Timer (Intel 8254)

Definition at line 43 of file intel_8254_timer.hh.

Member Enumeration Documentation

◆ ModeVal

enum Intel8254Timer::ModeVal

protected

Enumerator
InitTc
OneShot
RateGen
SquareWave
SoftwareStrobe
HardwareStrobe

Definition at line 67 of file intel_8254_timer.hh.

◆ ReadWriteVal

enum Intel8254Timer::ReadWriteVal

protected

Enumerator
LatchCommand
LsbOnly
MsbOnly
TwoPhase

Definition at line 60 of file intel_8254_timer.hh.

Constructor & Destructor Documentation

◆ ~Intel8254Timer()

virtual Intel8254Timer::~Intel8254Timer ( )

inlinevirtual

Definition at line 208 of file intel_8254_timer.hh.

◆ Intel8254Timer() [1/2]

Intel8254Timer::Intel8254Timer	(	EventManager *	em,
		const std::string &	name,
		Counter *	counter0,
		Counter *	counter1,
		Counter *	counter2
	)

◆ Intel8254Timer() [2/2]

Intel8254Timer::Intel8254Timer	(	EventManager *	em,
		const std::string &	name
	)

Member Function Documentation

◆ BitUnion8()

Intel8254Timer::BitUnion8 ( CtrlReg )

protected

◆ counterInterrupt()

virtual void Intel8254Timer::counterInterrupt ( unsigned int num )

inlineprotectedvirtual

Reimplemented in X86ISA::I8254::X86Intel8254Timer.

Definition at line 200 of file intel_8254_timer.hh.

References DPRINTF.

Referenced by Intel8254Timer::Counter::CounterEvent::process().

◆ EndBitUnion()

Intel8254Timer::EndBitUnion ( CtrlReg )

inlineprotected

Definition at line 51 of file intel_8254_timer.hh.

◆ name()

const std::string& Intel8254Timer::name ( ) const

inlineprotected

Definition at line 194 of file intel_8254_timer.hh.

References _name.

◆ outputHigh()

bool Intel8254Timer::outputHigh ( unsigned int num )

inline

Definition at line 234 of file intel_8254_timer.hh.

References counter, and Intel8254Timer::Counter::outputHigh().

Referenced by X86ISA::I8254::outputHigh().

◆ readCounter()

uint8_t Intel8254Timer::readCounter ( unsigned int num )

inline

Definition at line 220 of file intel_8254_timer.hh.

References counter, and Intel8254Timer::Counter::read().

Referenced by X86ISA::I8254::readCounter().

◆ serialize()

void Intel8254Timer::serialize	(	const std::string &	base,
		CheckpointOut &	cp
	)		const

Serialize this object to the given output stream.

Parameters

base	The base name of the counter object.
os	The stream to serialize to.

Definition at line 71 of file intel_8254_timer.cc.

References X86ISA::base, counter, and Intel8254Timer::Counter::serialize().

Referenced by MaltaIO::serialize().

◆ startup()

void Intel8254Timer::startup ( )

Start ticking.

Definition at line 89 of file intel_8254_timer.cc.

References counter, and Intel8254Timer::Counter::startup().

Referenced by MaltaIO::startup().

◆ unserialize()

void Intel8254Timer::unserialize	(	const std::string &	base,
		CheckpointIn &	cp
	)

Reconstruct the state of this object from a checkpoint.

Parameters

base	The base name of the counter object.
cp	The checkpoint use.
section	The section name of this object

Definition at line 80 of file intel_8254_timer.cc.

References X86ISA::base, counter, and Intel8254Timer::Counter::unserialize().

Referenced by MaltaIO::unserialize().

◆ writeControl()

void Intel8254Timer::writeControl ( const CtrlReg data )

Write control word.

Definition at line 54 of file intel_8254_timer.cc.

References counter, data, LatchCommand, Intel8254Timer::Counter::latchCount(), panic, sel, Intel8254Timer::Counter::setBCD(), Intel8254Timer::Counter::setMode(), and Intel8254Timer::Counter::setRW().

Referenced by X86ISA::I8254::writeControl().

◆ writeCounter()

void Intel8254Timer::writeCounter	(	unsigned int	num,
		const uint8_t	data
	)

inline

Definition at line 227 of file intel_8254_timer.hh.

References counter, data, and Intel8254Timer::Counter::write().

Referenced by X86ISA::I8254::writeCounter().

Member Data Documentation

◆ _name

std::string Intel8254Timer::_name

protected

Definition at line 193 of file intel_8254_timer.hh.

Referenced by name().

◆ bcd

Bitfield<0> Intel8254Timer::bcd

protected

Definition at line 50 of file intel_8254_timer.hh.

◆ counter

Counter* Intel8254Timer::counter[3]

protected

PIT has three seperate counters.

Definition at line 197 of file intel_8254_timer.hh.

Referenced by Intel8254Timer::Counter::CounterEvent::CounterEvent(), outputHigh(), Intel8254Timer::Counter::CounterEvent::process(), readCounter(), serialize(), Intel8254Timer::Counter::CounterEvent::setTo(), startup(), unserialize(), writeControl(), and writeCounter().

◆ mode

Bitfield<3, 1> Intel8254Timer::mode

protected

Definition at line 49 of file intel_8254_timer.hh.

Referenced by Intel8254Timer::Counter::currentCount(), Intel8254Timer::Counter::serialize(), Intel8254Timer::Counter::setMode(), Intel8254Timer::Counter::unserialize(), and Intel8254Timer::Counter::write().

◆ rw

Bitfield<5, 4> Intel8254Timer::rw

protected

Definition at line 48 of file intel_8254_timer.hh.

◆ sel

Intel8254Timer::sel

protected

Definition at line 47 of file intel_8254_timer.hh.

Referenced by writeControl().

The documentation for this class was generated from the following files:

dev/intel_8254_timer.hh
dev/intel_8254_timer.cc

Classes

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ ModeVal

◆ ReadWriteVal

Constructor & Destructor Documentation

◆ ~Intel8254Timer()

◆ Intel8254Timer() [1/2]

◆ Intel8254Timer() [2/2]

Member Function Documentation

◆ BitUnion8()

◆ counterInterrupt()

◆ EndBitUnion()

◆ name()

◆ outputHigh()

◆ readCounter()

◆ serialize()

◆ startup()

◆ unserialize()

◆ writeControl()

◆ writeCounter()

Member Data Documentation

◆ _name

◆ bcd

◆ counter

◆ mode

◆ rw

◆ sel