#include <mc146818.hh>

Inheritance diagram for gem5::MC146818:

Classes
struct	RTCEvent
	Event for RTC periodic interrupt. More...

struct	RTCTickEvent
	Event for RTC periodic interrupt. More...

Public Member Functions
	MC146818 (EventManager *em, const std::string &name, const struct tm time, bool bcd, Tick frequency)

virtual	~MC146818 ()

virtual void	startup ()
	Start ticking.

void	writeData (const uint8_t addr, const uint8_t data)
	RTC write data.

uint8_t	readData (const uint8_t addr)
	RTC read data.

void	tickClock ()

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.

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 Member Functions
virtual void	handleEvent ()

Private Member Functions
const std::string &	name () const

void	setTime (const struct tm time)

	BitUnion8 (RtcRegA) Bitfield< 7 > uip

	EndBitUnion (RtcRegA) static inline bool rega_dv_disabled(const RtcRegA &reg)
	Is the DV field in regA set to disabled?

	BitUnion8 (RtcRegB) Bitfield< 7 > set

	EndBitUnion (RtcRegB) RtcRegA stat_regA
	USA Daylight Savings Time enable.

Private Attributes
std::string	_name

RTCEvent	event
	RTC periodic interrupt event.

RTCTickEvent	tickEvent
	RTC tick event.

union {

uint8_t clock_data [10]

struct {

uint8_t sec

uint8_t sec_alrm

uint8_t min

uint8_t min_alrm

uint8_t hour

uint8_t hour_alrm

uint8_t wday

uint8_t mday

uint8_t mon

uint8_t year

}

};
	Data for real-time clock function.

struct tm	curTime

Bitfield< 6, 4 >	dv
	1 = date and time update in progress

Bitfield< 3, 0 >	rs
	Divider configuration.

Bitfield< 6 >	pie
	stop clock updates

Bitfield< 5 >	aie
	1 = enable periodic clock interrupt

Bitfield< 4 >	uie
	1 = enable alarm interrupt

Bitfield< 3 >	sqwe
	1 = enable update-ended interrupt

Bitfield< 2 >	dm
	1 = output sqare wave at SQW pin

Bitfield< 1 >	format24h
	0 = BCD, 1 = Binary coded time

Bitfield< 0 >	dse
	0 = 12 hours, 1 = 24 hours

RtcRegB	stat_regB
	RTC status register B.

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

Detailed Description

Real-Time Clock (MC146818)

Definition at line 41 of file mc146818.hh.

Constructor & Destructor Documentation

◆ MC146818()

gem5::MC146818::MC146818	(	EventManager *	em,
		const std::string &	name,
		const struct tm	time,
		bool	bcd,
		Tick	frequency )

Definition at line 91 of file mc146818.cc.

References clock_data, DPRINTFN, RTCA_DV_32768HZ, RTCA_RS_1024HZ, setTime(), and stat_regB.

◆ ~MC146818()

gem5::MC146818::~MC146818 ( )

virtual

Definition at line 110 of file mc146818.cc.

References gem5::EventManager::deschedule(), event, and tickEvent.

Member Function Documentation

◆ BitUnion8() [1/2]

gem5::MC146818::BitUnion8 ( RtcRegA )

private

◆ BitUnion8() [2/2]

gem5::MC146818::BitUnion8 ( RtcRegB )

private

◆ EndBitUnion() [1/2]

gem5::MC146818::EndBitUnion ( RtcRegA ) const &

private

Is the DV field in regA set to disabled?

◆ EndBitUnion() [2/2]

gem5::MC146818::EndBitUnion ( RtcRegB )

private

USA Daylight Savings Time enable.

RTC status register A

◆ handleEvent()

virtual void gem5::MC146818::handleEvent ( )

inlineprotectedvirtual

Reimplemented in gem5::MaltaIO::RTC, gem5::RiscvRTC::RTC, and gem5::X86ISA::Cmos::X86RTC.

Definition at line 44 of file mc146818.hh.

References warn.

◆ name()

const std::string & gem5::MC146818::name ( ) const

inlineprivate

Definition at line 88 of file mc146818.hh.

References _name.

◆ readData()

uint8_t gem5::MC146818::readData ( const uint8_t addr )

RTC read data.

Definition at line 229 of file mc146818.cc.

References gem5::X86ISA::addr, clock_data, panic, RTC_STAT_REGA, RTC_STAT_REGB, RTC_STAT_REGC, RTC_STAT_REGD, and stat_regB.

Referenced by gem5::X86ISA::Cmos::readRegister().

◆ serialize()

void gem5::MC146818::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 267 of file mc146818.cc.

References gem5::arrayParamOut(), gem5::X86ISA::base, clock_data, gem5::curTick(), gem5::paramOut(), SERIALIZE_SCALAR, stat_regB, tickEvent, and gem5::Event::when().

Referenced by gem5::MaltaIO::serialize(), gem5::RiscvRTC::serialize(), and gem5::X86ISA::Cmos::serialize().

◆ setTime()

void gem5::MC146818::setTime ( const struct tm time )

private

Definition at line 64 of file mc146818.cc.

References gem5::bcdize(), curTime, hour, mday, mon, sec, stat_regB, wday, and year.

Referenced by MC146818(), and tickClock().

◆ startup()

void gem5::MC146818::startup ( )

virtual

Start ticking.

Definition at line 124 of file mc146818.cc.

References gem5::curTick(), event, gem5::MC146818::RTCEvent::offset, gem5::MC146818::RTCTickEvent::offset, gem5::EventManager::schedule(), gem5::Event::scheduled(), stat_regB, and tickEvent.

Referenced by gem5::MaltaIO::startup(), gem5::RiscvRTC::startup(), and gem5::X86ISA::Cmos::startup().

◆ tickClock()

void gem5::MC146818::tickClock ( )

Definition at line 255 of file mc146818.cc.

References curTime, gem5::mkutctime(), setTime(), and stat_regB.

◆ unserialize()

void gem5::MC146818::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 287 of file mc146818.cc.

References gem5::arrayParamIn(), gem5::X86ISA::base, clock_data, gem5::MC146818::RTCTickEvent::offset, gem5::paramIn(), stat_regB, tickEvent, and UNSERIALIZE_SCALAR.

Referenced by gem5::MaltaIO::unserialize(), gem5::RiscvRTC::unserialize(), and gem5::X86ISA::Cmos::unserialize().

◆ writeData()

void gem5::MC146818::writeData	(	const uint8_t	addr,
		const uint8_t	data )

RTC write data.

Definition at line 136 of file mc146818.cc.

References gem5::X86ISA::addr, clock_data, gem5::curTick(), curTime, data, gem5::EventManager::deschedule(), event, hour, inform, mday, mon, panic, RTC_STAT_REGA, RTC_STAT_REGB, RTC_STAT_REGC, RTC_STAT_REGD, RTCA_DV_32768HZ, RTCA_RS_1024HZ, gem5::sim_clock::as_int::s, gem5::EventManager::schedule(), gem5::Event::scheduled(), sec, stat_regB, tickEvent, gem5::unbcdize(), wday, and year.

Referenced by gem5::X86ISA::Cmos::writeRegister().

Member Data Documentation

◆ [union]

union { ... } gem5::MC146818

Data for real-time clock function.

◆ _name

std::string gem5::MC146818::_name

private

Definition at line 87 of file mc146818.hh.

Referenced by name().

◆ aie

Bitfield<5> gem5::MC146818::aie

private

1 = enable periodic clock interrupt

Definition at line 141 of file mc146818.hh.

◆ clock_data

uint8_t gem5::MC146818::clock_data[10]

Definition at line 99 of file mc146818.hh.

Referenced by MC146818(), readData(), serialize(), unserialize(), and writeData().

◆ curTime

struct tm gem5::MC146818::curTime

private

Definition at line 116 of file mc146818.hh.

Referenced by setTime(), tickClock(), and writeData().

◆ dm

Bitfield<2> gem5::MC146818::dm

private

1 = output sqare wave at SQW pin

Definition at line 144 of file mc146818.hh.

◆ dse

Bitfield<0> gem5::MC146818::dse

private

0 = 12 hours, 1 = 24 hours

Definition at line 146 of file mc146818.hh.

◆ dv

Bitfield<6, 4> gem5::MC146818::dv

private

1 = date and time update in progress

Definition at line 122 of file mc146818.hh.

◆ event

RTCEvent gem5::MC146818::event

private

RTC periodic interrupt event.

Definition at line 91 of file mc146818.hh.

Referenced by startup(), writeData(), and ~MC146818().

◆ format24h

Bitfield<1> gem5::MC146818::format24h

private

0 = BCD, 1 = Binary coded time

Definition at line 145 of file mc146818.hh.

◆ hour

uint8_t gem5::MC146818::hour

Definition at line 107 of file mc146818.hh.

Referenced by setTime(), and writeData().

◆ hour_alrm

uint8_t gem5::MC146818::hour_alrm

Definition at line 108 of file mc146818.hh.

◆ mday

uint8_t gem5::MC146818::mday

Definition at line 110 of file mc146818.hh.

Referenced by setTime(), and writeData().

◆ min

uint8_t gem5::MC146818::min

Definition at line 105 of file mc146818.hh.

◆ min_alrm

uint8_t gem5::MC146818::min_alrm

Definition at line 106 of file mc146818.hh.

◆ mon

uint8_t gem5::MC146818::mon

Definition at line 111 of file mc146818.hh.

Referenced by setTime(), and writeData().

◆ pie

Bitfield<6> gem5::MC146818::pie

private

stop clock updates

Definition at line 140 of file mc146818.hh.

◆ rs

Bitfield<3, 0> gem5::MC146818::rs

private

Divider configuration.

Rate selection 0 = Disabled For 32768 Hz time bases: Freq = 32768Hz / 2**(n-1) for n >= 3 Freq = 256Hz if n = 1 Freq = 128Hz if n = 2 Othwerise: Freq = 32768Hz / 2**(n-1)

Definition at line 132 of file mc146818.hh.

◆ sec

uint8_t gem5::MC146818::sec

Definition at line 103 of file mc146818.hh.

Referenced by setTime(), and writeData().

◆ sec_alrm

uint8_t gem5::MC146818::sec_alrm

Definition at line 104 of file mc146818.hh.

◆ sqwe

Bitfield<3> gem5::MC146818::sqwe

private

1 = enable update-ended interrupt

Definition at line 143 of file mc146818.hh.

◆ stat_regB

RtcRegB gem5::MC146818::stat_regB

private

RTC status register B.

Definition at line 153 of file mc146818.hh.

Referenced by MC146818(), readData(), serialize(), setTime(), startup(), tickClock(), unserialize(), and writeData().

◆ tickEvent

RTCTickEvent gem5::MC146818::tickEvent

private

RTC tick event.

Definition at line 94 of file mc146818.hh.

Referenced by serialize(), startup(), unserialize(), writeData(), and ~MC146818().

◆ uie

Bitfield<4> gem5::MC146818::uie

private

1 = enable alarm interrupt

Definition at line 142 of file mc146818.hh.

◆ wday

uint8_t gem5::MC146818::wday

Definition at line 109 of file mc146818.hh.

Referenced by setTime(), and writeData().

◆ year

uint8_t gem5::MC146818::year

Definition at line 112 of file mc146818.hh.

Referenced by setTime(), and writeData().

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

dev/mc146818.hh
dev/mc146818.cc

Classes

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MC146818()

◆ ~MC146818()

Member Function Documentation

◆ BitUnion8() [1/2]

◆ BitUnion8() [2/2]

◆ EndBitUnion() [1/2]

◆ EndBitUnion() [2/2]

◆ handleEvent()

◆ name()

◆ readData()

◆ serialize()

◆ setTime()

◆ startup()

◆ tickClock()

◆ unserialize()

◆ writeData()

Member Data Documentation

◆ [union]

◆ _name

◆ aie

◆ clock_data

◆ curTime

◆ dm

◆ dse

◆ dv

◆ event

◆ format24h

◆ hour

◆ hour_alrm

◆ mday

◆ min

◆ min_alrm

◆ mon

◆ pie

◆ rs

◆ sec

◆ sec_alrm

◆ sqwe

◆ stat_regB

◆ tickEvent

◆ uie

◆ wday

◆ year