Programmable Interval Timer (Intel 8254) More...

#include <intel_8254_timer.hh>

Inheritance diagram for gem5::Intel8254Timer:

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

Public Member Functions
virtual	~Intel8254Timer ()

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

void	writeControl (const CtrlReg data)
	Write control word.

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.

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

void	startup ()
	Start ticking.

Public Member Functions inherited from gem5::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.

void	setCurTick (Tick newVal)

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

	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) BitUnion8(ReadBackCommandVal) Bitfield< 4 > status

	SubBitUnion (select, 3, 1) Bitfield< 3 > cnt2

	EndSubBitUnion (select) EndBitUnion(ReadBackCommandVal) 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

Bitfield< 5 >	count

Bitfield< 2 >	cnt1

Bitfield< 1 >	cnt0

std::string	_name

std::array< Counter, 3 >	counters
	PIT has three seperate counters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Detailed Description

Programmable Interval Timer (Intel 8254)

Definition at line 47 of file intel_8254_timer.hh.

Member Enumeration Documentation

◆ ModeVal

enum gem5::Intel8254Timer::ModeVal

protected

Enumerator
InitTc
OneShot
RateGen
SquareWave
SoftwareStrobe
HardwareStrobe

Definition at line 83 of file intel_8254_timer.hh.

◆ ReadWriteVal

enum gem5::Intel8254Timer::ReadWriteVal

protected

Enumerator
LatchCommand
LsbOnly
MsbOnly
TwoPhase

Definition at line 75 of file intel_8254_timer.hh.

Constructor & Destructor Documentation

◆ ~Intel8254Timer()

virtual gem5::Intel8254Timer::~Intel8254Timer ( )

inlinevirtual

Definition at line 227 of file intel_8254_timer.hh.

◆ Intel8254Timer()

gem5::Intel8254Timer::Intel8254Timer	(	EventManager *	em,
		const std::string &	name )

Definition at line 39 of file intel_8254_timer.cc.

References name().

Member Function Documentation

◆ BitUnion8()

gem5::Intel8254Timer::BitUnion8 ( CtrlReg )

protected

◆ counterInterrupt()

virtual void gem5::Intel8254Timer::counterInterrupt ( unsigned int num )

inlineprotectedvirtual

Reimplemented in gem5::X86ISA::I8254::X86Intel8254Timer.

Definition at line 219 of file intel_8254_timer.hh.

References DPRINTF.

◆ EndBitUnion()

gem5::Intel8254Timer::EndBitUnion ( CtrlReg )

protected

◆ EndSubBitUnion()

gem5::Intel8254Timer::EndSubBitUnion ( select )

inlineprotected

Definition at line 64 of file intel_8254_timer.hh.

◆ name()

const std::string & gem5::Intel8254Timer::name ( ) const

inlineprotected

Definition at line 213 of file intel_8254_timer.hh.

References _name.

Referenced by Intel8254Timer().

◆ outputHigh()

bool gem5::Intel8254Timer::outputHigh ( unsigned int num )

inline

Definition at line 250 of file intel_8254_timer.hh.

References counters.

Referenced by gem5::X86ISA::I8254::outputHigh().

◆ readCounter()

uint8_t gem5::Intel8254Timer::readCounter ( unsigned int num )

inline

Definition at line 236 of file intel_8254_timer.hh.

References counters.

Referenced by gem5::X86ISA::I8254::readCounter().

◆ serialize()

void gem5::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 77 of file intel_8254_timer.cc.

References gem5::X86ISA::base.

Referenced by gem5::MaltaIO::serialize().

◆ startup()

void gem5::Intel8254Timer::startup ( )

Start ticking.

Definition at line 95 of file intel_8254_timer.cc.

Referenced by gem5::MaltaIO::startup().

◆ SubBitUnion()

gem5::Intel8254Timer::SubBitUnion	(	select	,
		3	,
		1	)

protected

◆ unserialize()

void gem5::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 86 of file intel_8254_timer.cc.

References gem5::X86ISA::base.

Referenced by gem5::MaltaIO::unserialize().

◆ writeControl()

void gem5::Intel8254Timer::writeControl ( const CtrlReg data )

Write control word.

Definition at line 48 of file intel_8254_timer.cc.

References gem5::bits(), data, panic_if, and gem5::ArmISA::sel.

Referenced by gem5::X86ISA::I8254::writeControl().

◆ writeCounter()

void gem5::Intel8254Timer::writeCounter	(	unsigned int	num,
		const uint8_t	data )

inline

Definition at line 243 of file intel_8254_timer.hh.

References counters, and data.

Referenced by gem5::X86ISA::I8254::writeCounter().

Member Data Documentation

◆ _name

std::string gem5::Intel8254Timer::_name

protected

Definition at line 212 of file intel_8254_timer.hh.

Referenced by name().

◆ bcd

Bitfield<0> gem5::Intel8254Timer::bcd

protected

Definition at line 54 of file intel_8254_timer.hh.

◆ cnt0

Bitfield<1> gem5::Intel8254Timer::cnt0

protected

Definition at line 63 of file intel_8254_timer.hh.

◆ cnt1

Bitfield<2> gem5::Intel8254Timer::cnt1

protected

Definition at line 62 of file intel_8254_timer.hh.

◆ count

Bitfield<5> gem5::Intel8254Timer::count

protected

Definition at line 59 of file intel_8254_timer.hh.

Referenced by gem5::Intel8254Timer::Counter::read().

◆ counters

std::array<Counter, 3> gem5::Intel8254Timer::counters

protected

PIT has three seperate counters.

Definition at line 216 of file intel_8254_timer.hh.

Referenced by outputHigh(), readCounter(), and writeCounter().

◆ mode

Bitfield<3, 1> gem5::Intel8254Timer::mode

protected

Definition at line 53 of file intel_8254_timer.hh.

Referenced by gem5::Intel8254Timer::Counter::currentCount(), gem5::Intel8254Timer::Counter::serialize(), gem5::Intel8254Timer::Counter::setMode(), gem5::Intel8254Timer::Counter::unserialize(), and gem5::Intel8254Timer::Counter::write().

◆ rw

Bitfield<5, 4> gem5::Intel8254Timer::rw

protected

Definition at line 52 of file intel_8254_timer.hh.

◆ sel

gem5::Intel8254Timer::sel

protected

Definition at line 51 of file intel_8254_timer.hh.

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()

Member Function Documentation

◆ BitUnion8()

◆ counterInterrupt()

◆ EndBitUnion()

◆ EndSubBitUnion()

◆ name()

◆ outputHigh()

◆ readCounter()

◆ serialize()

◆ startup()

◆ SubBitUnion()

◆ unserialize()

◆ writeControl()

◆ writeCounter()

Member Data Documentation

◆ _name

◆ bcd

◆ cnt0

◆ cnt1

◆ count

◆ counters

◆ mode

◆ rw

◆ sel