SystemCounter Class Reference

Global system counter. More...

#include <generic_timer.hh>

Inheritance diagram for SystemCounter:

Public Member Functions
	SystemCounter (std::vector< uint32_t > &freqs)
uint64_t	value () const
	Returns the current value of the physical counter. More...
uint32_t	freq () const
	Returns the counter frequency. More...
void	setFreq (uint32_t freq)
	Sets the counter frequency. More...
Tick	period () const
	Returns the counter period. More...
void	setKernelControl (uint32_t val)
uint32_t	getKernelControl ()
void	setHypControl (uint32_t val)
uint32_t	getHypControl ()
void	serialize (CheckpointOut &cp) const override
	Serialize an object. More...
void	unserialize (CheckpointIn &cp) override
	Unserialize an object. More...
Public Member Functions inherited from Serializable
	Serializable ()
virtual	~Serializable ()
void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section. More...
void	serializeSection (CheckpointOut &cp, const std::string &name) const
void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object. More...
void	unserializeSection (CheckpointIn &cp, const std::string &name)

Protected Attributes
uint32_t	_freq
	Counter frequency (as specified by CNTFRQ). More...
std::vector< uint32_t >	_freqTable
	Frequency modes table with all possible frequencies for the counter. More...
Tick	_period
	Cached copy of the counter period (inverse of the frequency). More...
Tick	_resetTick
	Tick when the counter was reset. More...
uint32_t	_regCntkctl
	Kernel event stream control register. More...
uint32_t	_regCnthctl
	Hypervisor event stream control register. More...

Static Protected Attributes
static constexpr size_t	MAX_FREQ_ENTRIES = 1004
	Maximum architectural number of frequency table entries. More...

Private Member Functions
	SystemCounter (const SystemCounter &c)

Additional Inherited Members
Static Public Member Functions inherited from Serializable
static const std::string &	currentSection ()
	Get the fully-qualified name of the active section. More...
static void	serializeAll (const std::string &cpt_dir)
static void	unserializeGlobals (CheckpointIn &cp)
Static Public Attributes inherited from Serializable
static int	ckptCount = 0
static int	ckptMaxCount = 0
static int	ckptPrevCount = -1

Detailed Description

Global system counter.

It is shared by the architected timers.

Todo:

: implement memory-mapped controls

Definition at line 63 of file generic_timer.hh.

Constructor & Destructor Documentation

SystemCounter() [1/2]

SystemCounter::SystemCounter

(

std::vector< uint32_t > &

freqs

)

Definition at line 51 of file generic_timer.cc.

References _freq, _freqTable, _period, fatal_if, SimClock::Frequency, and MAX_FREQ_ENTRIES.

Referenced by getHypControl().

SystemCounter() [2/2]

SystemCounter::SystemCounter ( const SystemCounter &  c )

private

Member Function Documentation

freq()

uint32_t SystemCounter::freq ( ) const

inline

Returns the counter frequency.

Definition at line 95 of file generic_timer.hh.

References _freq, and setFreq().

Referenced by GenericTimerMem::ctrlRead(), GenericTimer::readMiscReg(), setFreq(), and GenericTimerMem::timerRead().

getHypControl()

uint32_t SystemCounter::getHypControl ( )

inline

Definition at line 107 of file generic_timer.hh.

References _regCnthctl, ArmISA::c, serialize(), SystemCounter(), and unserialize().

Referenced by GenericTimer::readMiscReg().

getKernelControl()

uint32_t SystemCounter::getKernelControl ( )

inline

Definition at line 104 of file generic_timer.hh.

References _regCntkctl.

Referenced by GenericTimer::readMiscReg().

period()

Tick SystemCounter::period ( ) const

inline

Returns the counter period.

Definition at line 101 of file generic_timer.hh.

References _period.

Referenced by ArchTimer::updateCounter().

serialize()

void SystemCounter::serialize ( CheckpointOut &  cp ) const

overridevirtual

Serialize an object.

Output an object's state into the current checkpoint section.

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 81 of file generic_timer.cc.

References _freq, _period, _regCnthctl, _regCntkctl, _resetTick, and SERIALIZE_SCALAR.

Referenced by getHypControl(), and ArchTimer::offset().

setFreq()

void SystemCounter::setFreq

(

uint32_t

freq

)

Sets the counter frequency.

Parameters

freq	frequency in Hz.

Definition at line 69 of file generic_timer.cc.

References _freq, _period, _resetTick, curTick(), freq(), SimClock::Frequency, and warn_once.

Referenced by freq(), and GenericTimer::setMiscReg().

setHypControl()

void SystemCounter::setHypControl ( uint32_t  val )

inline

Definition at line 106 of file generic_timer.hh.

References X86ISA::val.

Referenced by GenericTimer::setMiscReg().

setKernelControl()

void SystemCounter::setKernelControl ( uint32_t  val )

inline

Definition at line 103 of file generic_timer.hh.

References X86ISA::val.

Referenced by GenericTimer::setMiscReg().

unserialize()

void SystemCounter::unserialize ( CheckpointIn &  cp )

overridevirtual

Unserialize an object.

Read an object's state from the current checkpoint section.

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 91 of file generic_timer.cc.

References _freq, _period, _regCnthctl, _regCntkctl, _resetTick, UNSERIALIZE_OPT_SCALAR, and UNSERIALIZE_SCALAR.

Referenced by getHypControl(), and ArchTimer::offset().

value()

uint64_t SystemCounter::value ( ) const

inline

Returns the current value of the physical counter.

Definition at line 87 of file generic_timer.hh.

References _period, and curTick().

Referenced by GenericTimerMem::getAddrRanges(), ArchTimer::offset(), ArchTimer::timerValue(), and ArchTimer::value().

Member Data Documentation

_freq

uint32_t SystemCounter::_freq

protected

Counter frequency (as specified by CNTFRQ).

Definition at line 67 of file generic_timer.hh.

Referenced by freq(), serialize(), setFreq(), SystemCounter(), and unserialize().

_freqTable

std::vector<uint32_t> SystemCounter::_freqTable

protected

Frequency modes table with all possible frequencies for the counter.

Definition at line 69 of file generic_timer.hh.

Referenced by SystemCounter().

_period

Tick SystemCounter::_period

protected

Cached copy of the counter period (inverse of the frequency).

Definition at line 71 of file generic_timer.hh.

Referenced by period(), serialize(), setFreq(), SystemCounter(), unserialize(), and value().

_regCnthctl

uint32_t SystemCounter::_regCnthctl

protected

Hypervisor event stream control register.

Definition at line 78 of file generic_timer.hh.

Referenced by getHypControl(), serialize(), and unserialize().

_regCntkctl

uint32_t SystemCounter::_regCntkctl

protected

Kernel event stream control register.

Definition at line 76 of file generic_timer.hh.

Referenced by getKernelControl(), serialize(), and unserialize().

_resetTick

Tick SystemCounter::_resetTick

protected

Tick when the counter was reset.

Definition at line 73 of file generic_timer.hh.

Referenced by serialize(), setFreq(), and unserialize().

MAX_FREQ_ENTRIES

constexpr size_t SystemCounter::MAX_FREQ_ENTRIES = 1004

staticprotected

Maximum architectural number of frequency table entries.

Definition at line 81 of file generic_timer.hh.

Referenced by SystemCounter().

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

• dev/arm/generic_timer.hh
• dev/arm/generic_timer.cc