Intel8254Timer Class Reference

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
	EventManager (EventManager &em)
	EventManager (EventManager *em)
	EventManager (EventQueue *eq)
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)
void	setCurTick (Tick newVal)

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 47 of file intel_8254_timer.hh.

Member Enumeration Documentation

enum Intel8254Timer::ModeVal

protected

Enumerator
InitTc
OneShot
RateGen
SquareWave
SoftwareStrobe
HardwareStrobe

Definition at line 71 of file intel_8254_timer.hh.

enum Intel8254Timer::ReadWriteVal

protected

Enumerator
LatchCommand
LsbOnly
MsbOnly
TwoPhase

Definition at line 64 of file intel_8254_timer.hh.

Constructor & Destructor Documentation

virtual Intel8254Timer::~Intel8254Timer ( )

inlinevirtual

Definition at line 212 of file intel_8254_timer.hh.

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

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

Member Function Documentation

Intel8254Timer::BitUnion8 ( CtrlReg  )

protected

virtual void Intel8254Timer::counterInterrupt ( unsigned int  num )

inlineprotectedvirtual

Reimplemented in X86ISA::I8254::X86Intel8254Timer.

Definition at line 204 of file intel_8254_timer.hh.

References DPRINTF.

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

Intel8254Timer::EndBitUnion ( CtrlReg  )

inlineprotected

Definition at line 55 of file intel_8254_timer.hh.

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

inlineprotected

Definition at line 198 of file intel_8254_timer.hh.

References _name.

bool Intel8254Timer::outputHigh ( unsigned int  num )

inline

Definition at line 238 of file intel_8254_timer.hh.

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

Referenced by X86ISA::I8254::outputHigh(), and TsunamiIO::read().

uint8_t Intel8254Timer::readCounter ( unsigned int  num )

inline

Definition at line 224 of file intel_8254_timer.hh.

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

Referenced by TsunamiIO::read(), and X86ISA::I8254::readCounter().

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 75 of file intel_8254_timer.cc.

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

Referenced by MaltaIO::serialize(), and TsunamiIO::serialize().

void Intel8254Timer::startup

(

)

Start ticking.

Definition at line 93 of file intel_8254_timer.cc.

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

Referenced by MaltaIO::startup(), and TsunamiIO::startup().

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 84 of file intel_8254_timer.cc.

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

Referenced by MaltaIO::unserialize(), and TsunamiIO::unserialize().

void Intel8254Timer::writeControl

(

const CtrlReg

data

)

Write control word.

Definition at line 58 of file intel_8254_timer.cc.

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

Referenced by TsunamiIO::write(), and X86ISA::I8254::writeControl().

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

inline

Definition at line 231 of file intel_8254_timer.hh.

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

Referenced by TsunamiIO::write(), and X86ISA::I8254::writeCounter().

Member Data Documentation

std::string Intel8254Timer::_name

protected

Definition at line 197 of file intel_8254_timer.hh.

Referenced by name().

Bitfield<0> Intel8254Timer::bcd

protected

Definition at line 54 of file intel_8254_timer.hh.

Counter* Intel8254Timer::counter[3]

protected

PIT has three seperate counters.

Definition at line 201 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().

Bitfield<3, 1> Intel8254Timer::mode

protected

Definition at line 53 of file intel_8254_timer.hh.

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

Bitfield<5, 4> Intel8254Timer::rw

protected

Definition at line 52 of file intel_8254_timer.hh.

Intel8254Timer::sel

protected

Definition at line 51 of file intel_8254_timer.hh.

Referenced by writeControl().

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

• dev/intel_8254_timer.hh
• dev/intel_8254_timer.cc