#include <lsq.hh>

Classes
class	DcachePort
	DcachePort class for the load/store queue. More...

class	LSQRequest
	Memory operation metadata. More...

class	LSQSenderState
	Derived class to hold any sender state the LSQ needs. More...

class	SingleDataRequest

class	SplitDataRequest

Public Types
typedef Impl::O3CPU	O3CPU

typedef Impl::DynInstPtr	DynInstPtr

typedef Impl::CPUPol::IEW	IEW

typedef Impl::CPUPol::LSQUnit	LSQUnit

Public Member Functions
	LSQ (O3CPU cpu_ptr, IEW iew_ptr, DerivO3CPUParams *params)
	Constructs an LSQ with the given parameters. More...

	~LSQ ()

std::string	name () const
	Returns the name of the LSQ. More...

void	regStats ()
	Registers statistics of each LSQ unit. More...

void	setActiveThreads (std::list< ThreadID > *at_ptr)
	Sets the pointer to the list of active threads. More...

void	drainSanityCheck () const
	Perform sanity checks after a drain. More...

bool	isDrained () const
	Has the LSQ drained? More...

void	takeOverFrom ()
	Takes over execution from another CPU's thread. More...

int	entryAmount (ThreadID num_threads)
	Number of entries needed for the given amount of threads. More...

void	tick ()
	Ticks the LSQ. More...

void	insertLoad (const DynInstPtr &load_inst)
	Inserts a load into the LSQ. More...

void	insertStore (const DynInstPtr &store_inst)
	Inserts a store into the LSQ. More...

Fault	executeLoad (const DynInstPtr &inst)
	Executes a load. More...

Fault	executeStore (const DynInstPtr &inst)
	Executes a store. More...

void	commitLoads (InstSeqNum &youngest_inst, ThreadID tid)
	Commits loads up until the given sequence number for a specific thread. More...

void	commitStores (InstSeqNum &youngest_inst, ThreadID tid)
	Commits stores up until the given sequence number for a specific thread. More...

void	writebackStores ()
	Attempts to write back stores until all cache ports are used or the interface becomes blocked. More...

void	writebackStores (ThreadID tid)
	Same as above, but only for one thread. More...

void	squash (const InstSeqNum &squashed_num, ThreadID tid)
	Squash instructions from a thread until the specified sequence number. More...

bool	violation ()
	Returns whether or not there was a memory ordering violation. More...

bool	violation (ThreadID tid)
	Returns whether or not there was a memory ordering violation for a specific thread. More...

DynInstPtr	getMemDepViolator (ThreadID tid)
	Gets the instruction that caused the memory ordering violation. More...

int	getLoadHead (ThreadID tid)
	Returns the head index of the load queue for a specific thread. More...

InstSeqNum	getLoadHeadSeqNum (ThreadID tid)
	Returns the sequence number of the head of the load queue. More...

int	getStoreHead (ThreadID tid)
	Returns the head index of the store queue. More...

InstSeqNum	getStoreHeadSeqNum (ThreadID tid)
	Returns the sequence number of the head of the store queue. More...

int	getCount ()
	Returns the number of instructions in all of the queues. More...

int	getCount (ThreadID tid)
	Returns the number of instructions in the queues of one thread. More...

int	numLoads ()
	Returns the total number of loads in the load queue. More...

int	numLoads (ThreadID tid)
	Returns the total number of loads for a single thread. More...

int	numStores ()
	Returns the total number of stores in the store queue. More...

int	numStores (ThreadID tid)
	Returns the total number of stores for a single thread. More...

unsigned	numFreeLoadEntries ()
	Returns the number of free load entries. More...

unsigned	numFreeStoreEntries ()
	Returns the number of free store entries. More...

unsigned	numFreeEntries (ThreadID tid)
	Returns the number of free entries for a specific thread. More...

unsigned	numFreeLoadEntries (ThreadID tid)
	Returns the number of free entries in the LQ for a specific thread. More...

unsigned	numFreeStoreEntries (ThreadID tid)
	Returns the number of free entries in the SQ for a specific thread. More...

bool	isFull ()
	Returns if the LSQ is full (either LQ or SQ is full). More...

bool	isFull (ThreadID tid)
	Returns if the LSQ is full for a specific thread (either LQ or SQ is full). More...

bool	isEmpty () const
	Returns if the LSQ is empty (both LQ and SQ are empty). More...

bool	lqEmpty () const
	Returns if all of the LQs are empty. More...

bool	sqEmpty () const
	Returns if all of the SQs are empty. More...

bool	lqFull ()
	Returns if any of the LQs are full. More...

bool	lqFull (ThreadID tid)
	Returns if the LQ of a given thread is full. More...

bool	sqFull ()
	Returns if any of the SQs are full. More...

bool	sqFull (ThreadID tid)
	Returns if the SQ of a given thread is full. More...

bool	isStalled ()
	Returns if the LSQ is stalled due to a memory operation that must be replayed. More...

bool	isStalled (ThreadID tid)
	Returns if the LSQ of a specific thread is stalled due to a memory operation that must be replayed. More...

bool	hasStoresToWB ()
	Returns whether or not there are any stores to write back to memory. More...

bool	hasStoresToWB (ThreadID tid)
	Returns whether or not a specific thread has any stores to write back to memory. More...

int	numStoresToWB (ThreadID tid)
	Returns the number of stores a specific thread has to write back. More...

bool	willWB ()
	Returns if the LSQ will write back to memory this cycle. More...

bool	willWB (ThreadID tid)
	Returns if the LSQ of a specific thread will write back to memory this cycle. More...

void	dumpInsts () const
	Debugging function to print out all instructions. More...

void	dumpInsts (ThreadID tid) const
	Debugging function to print out instructions from a specific thread. More...

Fault	read (LSQRequest *req, int load_idx)
	Executes a read operation, using the load specified at the load index. More...

Fault	write (LSQRequest req, uint8_t data, int store_idx)
	Executes a store operation, using the store specified at the store index. More...

void	recvReqRetry ()
	Retry the previous send that failed. More...

void	completeDataAccess (PacketPtr pkt)

bool	recvTimingResp (PacketPtr pkt)
	Handles writing back and completing the load or store that has returned from memory. More...

void	recvTimingSnoopReq (PacketPtr pkt)

Fault	pushRequest (const DynInstPtr &inst, bool isLoad, uint8_t data, unsigned int size, Addr addr, Request::Flags flags, uint64_t res, AtomicOpFunctorPtr amo_op, const std::vector< bool > &byte_enable)

bool	cacheBlocked () const
	Is D-cache blocked? More...

void	cacheBlocked (bool v)
	Set D-cache blocked status. More...

bool	cachePortAvailable (bool is_load) const
	Is any store port available to use? More...

void	cachePortBusy (bool is_load)
	Another store port is in use. More...

MasterPort &	getDataPort ()

Public Attributes
O3CPU *	cpu
	The CPU pointer. More...

IEW *	iewStage
	The IEW stage pointer. More...

Static Protected Member Functions
static uint32_t	maxLSQAllocation (SMTQueuePolicy pol, uint32_t entries, uint32_t numThreads, uint32_t SMTThreshold)
	Auxiliary function to calculate per-thread max LSQ allocation limit. More...

Protected Attributes
bool	_cacheBlocked
	D-cache is blocked. More...

int	cacheStorePorts
	The number of cache ports available each cycle (stores only). More...

int	usedStorePorts
	The number of used cache ports in this cycle by stores. More...

int	cacheLoadPorts
	The number of cache ports available each cycle (loads only). More...

int	usedLoadPorts
	The number of used cache ports in this cycle by loads. More...

SMTQueuePolicy	lsqPolicy
	The LSQ policy for SMT mode. More...

std::list< ThreadID > *	activeThreads
	List of Active Threads in System. More...

unsigned	LQEntries
	Total Size of LQ Entries. More...

unsigned	SQEntries
	Total Size of SQ Entries. More...

unsigned	maxLQEntries
	Max LQ Size - Used to Enforce Sharing Policies. More...

unsigned	maxSQEntries
	Max SQ Size - Used to Enforce Sharing Policies. More...

DcachePort	dcachePort
	Data port. More...

std::vector< LSQUnit >	thread
	The LSQ units for individual threads. More...

ThreadID	numThreads
	Number of Threads. More...

Detailed Description

template<class Impl>
class LSQ< Impl >

Definition at line 62 of file lsq.hh.

Member Typedef Documentation

◆ DynInstPtr

template<class Impl>

typedef Impl::DynInstPtr LSQ< Impl >::DynInstPtr

Definition at line 67 of file lsq.hh.

◆ IEW

template<class Impl>

typedef Impl::CPUPol::IEW LSQ< Impl >::IEW

Definition at line 68 of file lsq.hh.

◆ LSQUnit

template<class Impl>

typedef Impl::CPUPol::LSQUnit LSQ< Impl >::LSQUnit

Definition at line 69 of file lsq.hh.

◆ O3CPU

template<class Impl>

typedef Impl::O3CPU LSQ< Impl >::O3CPU

Definition at line 66 of file lsq.hh.

Constructor & Destructor Documentation

◆ LSQ()

template<class Impl >

LSQ< Impl >::LSQ	(	O3CPU *	cpu_ptr,
		IEW *	iew_ptr,
		DerivO3CPUParams *	params
	)

Constructs an LSQ with the given parameters.

Definition at line 61 of file lsq_impl.hh.

References LSQ< Impl >::cpu, LSQ< Impl >::dcachePort, DPRINTF, LSQ< Impl >::lsqPolicy, LSQ< Impl >::maxLQEntries, LSQ< Impl >::maxSQEntries, LSQ< Impl >::numThreads, panic, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::SplitDataRequest::~SplitDataRequest().

◆ ~LSQ()

template<class Impl>

LSQ< Impl >::~LSQ ( )

inline

Definition at line 822 of file lsq.hh.

References LSQ< Impl >::drainSanityCheck(), LSQ< Impl >::entryAmount(), LSQ< Impl >::executeLoad(), LSQ< Impl >::executeStore(), LSQ< Impl >::insertLoad(), LSQ< Impl >::insertStore(), LSQ< Impl >::LSQSenderState::inst, LSQ< Impl >::isDrained(), LSQ< Impl >::name(), LSQ< Impl >::regStats(), LSQ< Impl >::setActiveThreads(), LSQ< Impl >::takeOverFrom(), and LSQ< Impl >::tick().

Member Function Documentation

◆ cacheBlocked() [1/2]

template<class Impl >

bool LSQ< Impl >::cacheBlocked ( ) const

Is D-cache blocked?

Definition at line 191 of file lsq_impl.hh.

References LSQ< Impl >::_cacheBlocked.

Referenced by LSQ< Impl >::recvReqRetry(), and LSQUnit< Impl >::trySendPacket().

◆ cacheBlocked() [2/2]

template<class Impl >

void LSQ< Impl >::cacheBlocked ( bool v )

Set D-cache blocked status.

Definition at line 198 of file lsq_impl.hh.

References LSQ< Impl >::_cacheBlocked, and ArmISA::v.

◆ cachePortAvailable()

template<class Impl >

bool LSQ< Impl >::cachePortAvailable ( bool is_load ) const

Is any store port available to use?

Definition at line 205 of file lsq_impl.hh.

References LSQ< Impl >::cacheLoadPorts, LSQ< Impl >::cacheStorePorts, LSQ< Impl >::usedLoadPorts, and LSQ< Impl >::usedStorePorts.

Referenced by LSQ< Impl >::cachePortBusy(), LSQUnit< Impl >::trySendPacket(), and LSQUnit< Impl >::writebackStores().

◆ cachePortBusy()

template<class Impl >

void LSQ< Impl >::cachePortBusy ( bool is_load )

Another store port is in use.

Definition at line 218 of file lsq_impl.hh.

References LSQ< Impl >::cachePortAvailable(), LSQ< Impl >::usedLoadPorts, and LSQ< Impl >::usedStorePorts.

Referenced by LSQUnit< Impl >::trySendPacket().

◆ commitLoads()

template<class Impl>

void LSQ< Impl >::commitLoads	(	InstSeqNum &	youngest_inst,
		ThreadID	tid
	)

inline

Commits loads up until the given sequence number for a specific thread.

Definition at line 860 of file lsq.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::tick().

◆ commitStores()

template<class Impl>

void LSQ< Impl >::commitStores	(	InstSeqNum &	youngest_inst,
		ThreadID	tid
	)

inline

Commits stores up until the given sequence number for a specific thread.

Definition at line 866 of file lsq.hh.

References LSQ< Impl >::thread, and LSQ< Impl >::writebackStores().

Referenced by DefaultIEW< Impl >::tick().

◆ completeDataAccess()

template<class Impl >

void LSQ< Impl >::completeDataAccess ( PacketPtr pkt )

Definition at line 315 of file lsq_impl.hh.

References LSQ< Impl >::cpu, Packet::senderState, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::dumpInsts().

◆ drainSanityCheck()

template<class Impl >

void LSQ< Impl >::drainSanityCheck ( ) const

Perform sanity checks after a drain.

Definition at line 138 of file lsq_impl.hh.

References LSQ< Impl >::isDrained(), LSQ< Impl >::numThreads, and LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::drainSanityCheck(), and LSQ< Impl >::~LSQ().

◆ dumpInsts() [1/2]

template<class Impl >

void LSQ< Impl >::dumpInsts ( ) const

Debugging function to print out all instructions.

Definition at line 672 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::willWB().

◆ dumpInsts() [2/2]

template<class Impl>

void LSQ< Impl >::dumpInsts ( ThreadID tid ) const

inline

Debugging function to print out instructions from a specific thread.

Definition at line 1008 of file lsq.hh.

References addr, LSQ< Impl >::completeDataAccess(), data, LSQ< Impl >::LSQSenderState::isLoad, LSQ< Impl >::pushRequest(), LSQ< Impl >::read(), LSQ< Impl >::recvReqRetry(), LSQ< Impl >::recvTimingResp(), LSQ< Impl >::recvTimingSnoopReq(), LSQ< Impl >::thread, and LSQ< Impl >::write().

◆ entryAmount()

template<class Impl>

int LSQ< Impl >::entryAmount ( ThreadID num_threads )

Number of entries needed for the given amount of threads.

Referenced by LSQ< Impl >::~LSQ().

◆ executeLoad()

template<class Impl >

Fault LSQ< Impl >::executeLoad ( const DynInstPtr & inst )

Executes a load.

Definition at line 248 of file lsq_impl.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::executeInsts(), and LSQ< Impl >::~LSQ().

◆ executeStore()

template<class Impl >

Fault LSQ< Impl >::executeStore ( const DynInstPtr & inst )

Executes a store.

Definition at line 257 of file lsq_impl.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::executeInsts(), and LSQ< Impl >::~LSQ().

◆ getCount() [1/2]

template<class Impl >

int LSQ< Impl >::getCount ( )

Returns the number of instructions in all of the queues.

Definition at line 379 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and Stats::total.

Referenced by LSQ< Impl >::getStoreHeadSeqNum(), and DefaultIEW< Impl >::tick().

◆ getCount() [2/2]

template<class Impl>

int LSQ< Impl >::getCount ( ThreadID tid )

inline

Returns the number of instructions in the queues of one thread.

Definition at line 924 of file lsq.hh.

References LSQ< Impl >::numLoads(), and LSQ< Impl >::thread.

◆ getDataPort()

template<class Impl>

MasterPort& LSQ< Impl >::getDataPort ( )

inline

Definition at line 1056 of file lsq.hh.

References LSQ< Impl >::dcachePort.

Referenced by DefaultIEW< Impl >::startupStage().

◆ getLoadHead()

template<class Impl>

int LSQ< Impl >::getLoadHead ( ThreadID tid )

inline

Returns the head index of the load queue for a specific thread.

Definition at line 902 of file lsq.hh.

References LSQ< Impl >::thread.

◆ getLoadHeadSeqNum()

template<class Impl>

InstSeqNum LSQ< Impl >::getLoadHeadSeqNum ( ThreadID tid )

inline

Returns the sequence number of the head of the load queue.

Definition at line 906 of file lsq.hh.

References LSQ< Impl >::thread.

◆ getMemDepViolator()

template<class Impl>

DynInstPtr LSQ< Impl >::getMemDepViolator ( ThreadID tid )

inline

Gets the instruction that caused the memory ordering violation.

Definition at line 896 of file lsq.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::executeInsts().

◆ getStoreHead()

template<class Impl>

int LSQ< Impl >::getStoreHead ( ThreadID tid )

inline

Returns the head index of the store queue.

Definition at line 912 of file lsq.hh.

References LSQ< Impl >::thread.

◆ getStoreHeadSeqNum()

template<class Impl>

InstSeqNum LSQ< Impl >::getStoreHeadSeqNum ( ThreadID tid )

inline

Returns the sequence number of the head of the store queue.

Definition at line 916 of file lsq.hh.

References LSQ< Impl >::getCount(), and LSQ< Impl >::thread.

◆ hasStoresToWB() [1/2]

template<class Impl >

bool LSQ< Impl >::hasStoresToWB ( )

Returns whether or not there are any stores to write back to memory.

Definition at line 638 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads.

Referenced by DefaultIEW< Impl >::hasStoresToWB(), and LSQ< Impl >::numStores().

◆ hasStoresToWB() [2/2]

template<class Impl>

bool LSQ< Impl >::hasStoresToWB ( ThreadID tid )

inline

Returns whether or not a specific thread has any stores to write back to memory.

Definition at line 993 of file lsq.hh.

References LSQ< Impl >::thread.

◆ insertLoad()

template<class Impl >

void LSQ< Impl >::insertLoad ( const DynInstPtr & load_inst )

Inserts a load into the LSQ.

Definition at line 230 of file lsq_impl.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::dispatchInsts(), and LSQ< Impl >::~LSQ().

◆ insertStore()

template<class Impl >

void LSQ< Impl >::insertStore ( const DynInstPtr & store_inst )

Inserts a store into the LSQ.

Definition at line 239 of file lsq_impl.hh.

References LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::dispatchInsts(), and LSQ< Impl >::~LSQ().

◆ isDrained()

template<class Impl >

bool LSQ< Impl >::isDrained ( ) const

Has the LSQ drained?

Definition at line 148 of file lsq_impl.hh.

References DPRINTF, LSQ< Impl >::lqEmpty(), and LSQ< Impl >::sqEmpty().

Referenced by LSQ< Impl >::drainSanityCheck(), DefaultIEW< Impl >::isDrained(), and LSQ< Impl >::~LSQ().

◆ isEmpty()

template<class Impl >

bool LSQ< Impl >::isEmpty ( ) const

Returns if the LSQ is empty (both LQ and SQ are empty).

Definition at line 512 of file lsq_impl.hh.

References LSQ< Impl >::lqEmpty(), and LSQ< Impl >::sqEmpty().

Referenced by LSQ< Impl >::numStores().

◆ isFull() [1/2]

template<class Impl >

bool LSQ< Impl >::isFull ( )

Returns if the LSQ is full (either LQ or SQ is full).

Definition at line 483 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, LSQ< Impl >::lqFull(), LSQ< Impl >::sqFull(), and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::isFull(), and LSQ< Impl >::numStores().

◆ isFull() [2/2]

template<class Impl >

bool LSQ< Impl >::isFull ( ThreadID tid )

Returns if the LSQ is full for a specific thread (either LQ or SQ is full).

Definition at line 500 of file lsq_impl.hh.

References LSQ< Impl >::isFull(), LSQ< Impl >::lsqPolicy, and LSQ< Impl >::thread.

◆ isStalled() [1/2]

template<class Impl >

bool LSQ< Impl >::isStalled ( )

Returns if the LSQ is stalled due to a memory operation that must be replayed.

Definition at line 611 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::isStalled(), and LSQ< Impl >::numStores().

◆ isStalled() [2/2]

template<class Impl >

bool LSQ< Impl >::isStalled ( ThreadID tid )

Returns if the LSQ of a specific thread is stalled due to a memory operation that must be replayed.

Definition at line 628 of file lsq_impl.hh.

References LSQ< Impl >::isStalled(), LSQ< Impl >::lsqPolicy, and LSQ< Impl >::thread.

◆ lqEmpty()

template<class Impl >

bool LSQ< Impl >::lqEmpty ( ) const

Returns if all of the LQs are empty.

Definition at line 519 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::isDrained(), LSQ< Impl >::isEmpty(), and LSQ< Impl >::numStores().

◆ lqFull() [1/2]

template<class Impl >

bool LSQ< Impl >::lqFull ( )

Returns if any of the LQs are full.

Definition at line 553 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::dispatchInsts(), LSQ< Impl >::isFull(), LSQ< Impl >::lqFull(), and LSQ< Impl >::numStores().

◆ lqFull() [2/2]

template<class Impl >

bool LSQ< Impl >::lqFull ( ThreadID tid )

Returns if the LQ of a given thread is full.

Definition at line 570 of file lsq_impl.hh.

References LSQ< Impl >::lqFull(), LSQ< Impl >::lsqPolicy, and LSQ< Impl >::thread.

◆ maxLSQAllocation()

template<class Impl>

static uint32_t LSQ< Impl >::maxLSQAllocation	(	SMTQueuePolicy	pol,
		uint32_t	entries,
		uint32_t	numThreads,
		uint32_t	SMTThreshold
	)

inlinestaticprotected

Auxiliary function to calculate per-thread max LSQ allocation limit.

Depending on a policy, number of entries and possibly number of threads and threshold, this function calculates how many resources each thread can occupy at most.

Definition at line 1080 of file lsq.hh.

References LSQ< Impl >::numThreads.

◆ name()

template<class Impl >

std::string LSQ< Impl >::name ( ) const

Returns the name of the LSQ.

Definition at line 113 of file lsq_impl.hh.

References LSQ< Impl >::iewStage.

Referenced by LSQ< Impl >::~LSQ().

◆ numFreeEntries()

template<class Impl>

unsigned LSQ< Impl >::numFreeEntries ( ThreadID tid )

Returns the number of free entries for a specific thread.

Referenced by LSQ< Impl >::numStores().

◆ numFreeLoadEntries() [1/2]

template<class Impl >

unsigned LSQ< Impl >::numFreeLoadEntries ( )

Returns the number of free load entries.

Definition at line 433 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, LSQ< Impl >::thread, and Stats::total.

Referenced by DefaultIEW< Impl >::clearStates(), LSQ< Impl >::numStores(), DefaultIEW< Impl >::startupStage(), and DefaultIEW< Impl >::tick().

◆ numFreeLoadEntries() [2/2]

template<class Impl >

unsigned LSQ< Impl >::numFreeLoadEntries ( ThreadID tid )

Returns the number of free entries in the LQ for a specific thread.

Definition at line 469 of file lsq_impl.hh.

References LSQ< Impl >::thread.

◆ numFreeStoreEntries() [1/2]

template<class Impl >

unsigned LSQ< Impl >::numFreeStoreEntries ( )

Returns the number of free store entries.

Definition at line 451 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, LSQ< Impl >::thread, and Stats::total.

Referenced by DefaultIEW< Impl >::clearStates(), LSQ< Impl >::numStores(), DefaultIEW< Impl >::startupStage(), and DefaultIEW< Impl >::tick().

◆ numFreeStoreEntries() [2/2]

template<class Impl >

unsigned LSQ< Impl >::numFreeStoreEntries ( ThreadID tid )

Returns the number of free entries in the SQ for a specific thread.

Definition at line 476 of file lsq_impl.hh.

References LSQ< Impl >::thread.

◆ numLoads() [1/2]

template<class Impl >

int LSQ< Impl >::numLoads ( )

Returns the total number of loads in the load queue.

Definition at line 397 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and Stats::total.

Referenced by LSQ< Impl >::getCount().

◆ numLoads() [2/2]

template<class Impl>

int LSQ< Impl >::numLoads ( ThreadID tid )

inline

Returns the total number of loads for a single thread.

Definition at line 929 of file lsq.hh.

References LSQ< Impl >::numStores(), and LSQ< Impl >::thread.

◆ numStores() [1/2]

template<class Impl >

int LSQ< Impl >::numStores ( )

Returns the total number of stores in the store queue.

Definition at line 415 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, LSQ< Impl >::thread, and Stats::total.

Referenced by LSQ< Impl >::numLoads().

◆ numStores() [2/2]

template<class Impl>

int LSQ< Impl >::numStores ( ThreadID tid )

inline

Returns the total number of stores for a single thread.

Definition at line 934 of file lsq.hh.

References LSQ< Impl >::hasStoresToWB(), LSQ< Impl >::isEmpty(), LSQ< Impl >::isFull(), LSQ< Impl >::isStalled(), LSQ< Impl >::lqEmpty(), LSQ< Impl >::lqFull(), LSQ< Impl >::numFreeEntries(), LSQ< Impl >::numFreeLoadEntries(), LSQ< Impl >::numFreeStoreEntries(), LSQ< Impl >::sqEmpty(), LSQ< Impl >::sqFull(), and LSQ< Impl >::thread.

◆ numStoresToWB()

template<class Impl>

int LSQ< Impl >::numStoresToWB ( ThreadID tid )

inline

Returns the number of stores a specific thread has to write back.

Definition at line 996 of file lsq.hh.

References LSQ< Impl >::thread, and LSQ< Impl >::willWB().

Referenced by LSQ< Impl >::writebackStores().

◆ pushRequest()

template<class Impl >

Fault LSQ< Impl >::pushRequest	(	const DynInstPtr &	inst,
		bool	isLoad,
		uint8_t *	data,
		unsigned int	size,
		Addr	addr,
		Request::Flags	flags,
		uint64_t *	res,
		AtomicOpFunctorPtr	amo_op,
		const std::vector< bool > &	byte_enable
	)

Definition at line 686 of file lsq_impl.hh.

References LSQ< Impl >::LSQRequest::_byteEnable, LSQ< Impl >::cpu, LSQ< Impl >::LSQRequest::getVaddr(), LSQ< Impl >::LSQRequest::initiateTranslation(), LSQ< Impl >::LSQRequest::isMemAccessRequired(), LSQ< Impl >::LSQRequest::isTranslationComplete(), NoFault, LSQ< Impl >::LSQRequest::request(), LSQ< Impl >::LSQRequest::taskId(), LSQ< Impl >::thread, and transferNeedsBurst().

Referenced by LSQ< Impl >::dumpInsts().

◆ read()

template<class Impl >

Fault LSQ< Impl >::read	(	LSQRequest *	req,
		int	load_idx
	)

Executes a read operation, using the load specified at the load index.

Definition at line 1123 of file lsq.hh.

References LSQ< Impl >::cpu, LSQ< Impl >::LSQRequest::request(), and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::dumpInsts().

◆ recvReqRetry()

template<class Impl >

void LSQ< Impl >::recvReqRetry ( )

Retry the previous send that failed.

Definition at line 303 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, LSQ< Impl >::cacheBlocked(), LSQ< Impl >::iewStage, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::dumpInsts(), and LSQ< Impl >::DcachePort::recvFunctionalSnoop().

◆ recvTimingResp()

template<class Impl >

bool LSQ< Impl >::recvTimingResp ( PacketPtr pkt )

Handles writing back and completing the load or store that has returned from memory.

Parameters

pkt	Response packet from the memory sub-system

Definition at line 324 of file lsq_impl.hh.

References LSQ< Impl >::cpu, DPRINTF, Packet::getAddr(), Packet::isError(), Packet::isInvalidate(), LSQ< Impl >::numThreads, panic_if, Packet::senderState, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::DcachePort::DcachePort(), LSQ< Impl >::dumpInsts(), LSQ< Impl >::LSQRequest::isSplit(), LSQ< Impl >::SingleDataRequest::~SingleDataRequest(), and LSQ< Impl >::SplitDataRequest::~SplitDataRequest().

◆ recvTimingSnoopReq()

template<class Impl >

void LSQ< Impl >::recvTimingSnoopReq ( PacketPtr pkt )

Definition at line 362 of file lsq_impl.hh.

References Packet::cmdString(), DPRINTF, Packet::getAddr(), Packet::isInvalidate(), LSQ< Impl >::numThreads, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::DcachePort::DcachePort(), and LSQ< Impl >::dumpInsts().

◆ regStats()

template<class Impl >

void LSQ< Impl >::regStats ( )

Registers statistics of each LSQ unit.

Definition at line 120 of file lsq_impl.hh.

References LSQ< Impl >::numThreads, and LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::regStats(), and LSQ< Impl >::~LSQ().

◆ setActiveThreads()

template<class Impl >

void LSQ< Impl >::setActiveThreads ( std::list< ThreadID > * at_ptr )

Sets the pointer to the list of active threads.

Definition at line 130 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads.

Referenced by DefaultIEW< Impl >::setActiveThreads(), and LSQ< Impl >::~LSQ().

◆ sqEmpty()

template<class Impl >

bool LSQ< Impl >::sqEmpty ( ) const

Returns if all of the SQs are empty.

Definition at line 536 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::isDrained(), LSQ< Impl >::isEmpty(), and LSQ< Impl >::numStores().

◆ sqFull() [1/2]

template<class Impl >

bool LSQ< Impl >::sqFull ( )

Returns if any of the SQs are full.

Definition at line 582 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads.

Referenced by DefaultIEW< Impl >::dispatchInsts(), LSQ< Impl >::isFull(), LSQ< Impl >::numStores(), and LSQ< Impl >::sqFull().

◆ sqFull() [2/2]

template<class Impl >

bool LSQ< Impl >::sqFull ( ThreadID tid )

Returns if the SQ of a given thread is full.

Definition at line 599 of file lsq_impl.hh.

References LSQ< Impl >::lsqPolicy, LSQ< Impl >::sqFull(), and LSQ< Impl >::thread.

◆ squash()

template<class Impl>

void LSQ< Impl >::squash	(	const InstSeqNum &	squashed_num,
		ThreadID	tid
	)

inline

Squash instructions from a thread until the specified sequence number.

Definition at line 881 of file lsq.hh.

References LSQ< Impl >::thread, and LSQ< Impl >::violation().

Referenced by DefaultIEW< Impl >::squash().

◆ takeOverFrom()

template<class Impl >

void LSQ< Impl >::takeOverFrom ( )

Takes over execution from another CPU's thread.

Definition at line 167 of file lsq_impl.hh.

References LSQ< Impl >::_cacheBlocked, LSQ< Impl >::numThreads, LSQ< Impl >::thread, and LSQ< Impl >::usedStorePorts.

Referenced by DefaultIEW< Impl >::takeOverFrom(), and LSQ< Impl >::~LSQ().

◆ tick()

template<class Impl >

void LSQ< Impl >::tick ( )

Ticks the LSQ.

Definition at line 179 of file lsq_impl.hh.

References LSQ< Impl >::_cacheBlocked, LSQ< Impl >::cacheLoadPorts, LSQ< Impl >::iewStage, LSQ< Impl >::usedLoadPorts, and LSQ< Impl >::usedStorePorts.

Referenced by DefaultIEW< Impl >::tick(), and LSQ< Impl >::~LSQ().

◆ violation() [1/2]

template<class Impl >

bool LSQ< Impl >::violation ( )

Returns whether or not there was a memory ordering violation.

Definition at line 285 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, and LSQ< Impl >::thread.

Referenced by DefaultIEW< Impl >::executeInsts(), and LSQ< Impl >::squash().

◆ violation() [2/2]

template<class Impl>

bool LSQ< Impl >::violation ( ThreadID tid )

inline

Returns whether or not there was a memory ordering violation for a specific thread.

Definition at line 892 of file lsq.hh.

References LSQ< Impl >::thread.

◆ willWB() [1/2]

template<class Impl >

bool LSQ< Impl >::willWB ( )

Returns if the LSQ will write back to memory this cycle.

Definition at line 655 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads.

Referenced by LSQ< Impl >::numStoresToWB(), and DefaultIEW< Impl >::updateStatus().

◆ willWB() [2/2]

template<class Impl>

bool LSQ< Impl >::willWB ( ThreadID tid )

inline

Returns if the LSQ of a specific thread will write back to memory this cycle.

Definition at line 1003 of file lsq.hh.

References LSQ< Impl >::dumpInsts(), and LSQ< Impl >::thread.

◆ write()

template<class Impl >

Fault LSQ< Impl >::write	(	LSQRequest *	req,
		uint8_t *	data,
		int	store_idx
	)

Executes a store operation, using the store specified at the store index.

Definition at line 1132 of file lsq.hh.

References LSQ< Impl >::cpu, LSQ< Impl >::LSQRequest::request(), and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::dumpInsts().

◆ writebackStores() [1/2]

template<class Impl >

void LSQ< Impl >::writebackStores ( )

Attempts to write back stores until all cache ports are used or the interface becomes blocked.

Definition at line 266 of file lsq_impl.hh.

References LSQ< Impl >::activeThreads, DPRINTF, LSQ< Impl >::numStoresToWB(), and LSQ< Impl >::thread.

Referenced by LSQ< Impl >::commitStores(), and DefaultIEW< Impl >::tick().

◆ writebackStores() [2/2]

template<class Impl>

void LSQ< Impl >::writebackStores ( ThreadID tid )

Same as above, but only for one thread.

Member Data Documentation

◆ _cacheBlocked

template<class Impl>

bool LSQ< Impl >::_cacheBlocked

protected

D-cache is blocked.

Definition at line 1060 of file lsq.hh.

Referenced by LSQ< Impl >::cacheBlocked(), LSQ< Impl >::takeOverFrom(), and LSQ< Impl >::tick().

◆ activeThreads

template<class Impl>

std::list<ThreadID>* LSQ< Impl >::activeThreads

protected

◆ cacheLoadPorts

template<class Impl>

int LSQ< Impl >::cacheLoadPorts

protected

The number of cache ports available each cycle (loads only).

Definition at line 1066 of file lsq.hh.

Referenced by LSQ< Impl >::cachePortAvailable(), and LSQ< Impl >::tick().

◆ cacheStorePorts

template<class Impl>

int LSQ< Impl >::cacheStorePorts

protected

The number of cache ports available each cycle (stores only).

Definition at line 1062 of file lsq.hh.

Referenced by LSQ< Impl >::cachePortAvailable().

◆ cpu

template<class Impl>

O3CPU* LSQ< Impl >::cpu

The CPU pointer.

Definition at line 1042 of file lsq.hh.

Referenced by LSQ< Impl >::completeDataAccess(), LSQ< Impl >::LSQ(), LSQ< Impl >::pushRequest(), LSQ< Impl >::read(), LSQ< Impl >::recvTimingResp(), LSQ< Impl >::DcachePort::recvTimingSnoopReq(), and LSQ< Impl >::write().

◆ dcachePort

template<class Impl>

DcachePort LSQ< Impl >::dcachePort

protected

Data port.

Definition at line 1112 of file lsq.hh.

Referenced by LSQ< Impl >::getDataPort(), and LSQ< Impl >::LSQ().

◆ iewStage

template<class Impl>

IEW* LSQ< Impl >::iewStage

The IEW stage pointer.

Definition at line 1045 of file lsq.hh.

Referenced by LSQ< Impl >::name(), LSQ< Impl >::recvReqRetry(), and LSQ< Impl >::tick().

◆ LQEntries

template<class Impl>

unsigned LSQ< Impl >::LQEntries

protected

Total Size of LQ Entries.

Definition at line 1101 of file lsq.hh.

◆ lsqPolicy

template<class Impl>

SMTQueuePolicy LSQ< Impl >::lsqPolicy

protected

The LSQ policy for SMT mode.

Definition at line 1072 of file lsq.hh.

Referenced by LSQ< Impl >::isFull(), LSQ< Impl >::isStalled(), LSQ< Impl >::lqFull(), LSQ< Impl >::LSQ(), and LSQ< Impl >::sqFull().

◆ maxLQEntries

template<class Impl>

unsigned LSQ< Impl >::maxLQEntries

protected

Max LQ Size - Used to Enforce Sharing Policies.

Definition at line 1106 of file lsq.hh.

Referenced by LSQ< Impl >::LSQ().

◆ maxSQEntries

template<class Impl>

unsigned LSQ< Impl >::maxSQEntries

protected

Max SQ Size - Used to Enforce Sharing Policies.

Definition at line 1109 of file lsq.hh.

Referenced by LSQ< Impl >::LSQ().

◆ numThreads

template<class Impl>

ThreadID LSQ< Impl >::numThreads

protected

Number of Threads.

Definition at line 1118 of file lsq.hh.

Referenced by LSQ< Impl >::drainSanityCheck(), LSQ< Impl >::LSQ(), LSQ< Impl >::maxLSQAllocation(), LSQ< Impl >::recvTimingResp(), LSQ< Impl >::recvTimingSnoopReq(), LSQ< Impl >::regStats(), and LSQ< Impl >::takeOverFrom().

◆ SQEntries

template<class Impl>

unsigned LSQ< Impl >::SQEntries

protected

Total Size of SQ Entries.

Definition at line 1103 of file lsq.hh.

◆ thread

template<class Impl>

std::vector<LSQUnit> LSQ< Impl >::thread

protected

The LSQ units for individual threads.

Definition at line 1115 of file lsq.hh.

Referenced by LSQ< Impl >::commitLoads(), LSQ< Impl >::commitStores(), LSQ< Impl >::completeDataAccess(), LSQ< Impl >::drainSanityCheck(), LSQ< Impl >::dumpInsts(), LSQ< Impl >::executeLoad(), LSQ< Impl >::executeStore(), LSQ< Impl >::getCount(), LSQ< Impl >::getLoadHead(), LSQ< Impl >::getLoadHeadSeqNum(), LSQ< Impl >::getMemDepViolator(), LSQ< Impl >::getStoreHead(), LSQ< Impl >::getStoreHeadSeqNum(), LSQ< Impl >::hasStoresToWB(), LSQ< Impl >::insertLoad(), LSQ< Impl >::insertStore(), LSQ< Impl >::isFull(), LSQ< Impl >::LSQRequest::isSplit(), LSQ< Impl >::isStalled(), LSQ< Impl >::lqEmpty(), LSQ< Impl >::lqFull(), LSQ< Impl >::LSQ(), LSQ< Impl >::numFreeLoadEntries(), LSQ< Impl >::numFreeStoreEntries(), LSQ< Impl >::numLoads(), LSQ< Impl >::numStores(), LSQ< Impl >::numStoresToWB(), LSQ< Impl >::pushRequest(), LSQ< Impl >::read(), LSQ< Impl >::recvReqRetry(), LSQ< Impl >::recvTimingResp(), LSQ< Impl >::recvTimingSnoopReq(), LSQ< Impl >::regStats(), LSQ< Impl >::sqEmpty(), LSQ< Impl >::sqFull(), LSQ< Impl >::squash(), LSQ< Impl >::takeOverFrom(), LSQ< Impl >::violation(), LSQ< Impl >::willWB(), LSQ< Impl >::write(), LSQ< Impl >::writebackStores(), LSQ< Impl >::SingleDataRequest::~SingleDataRequest(), and LSQ< Impl >::SplitDataRequest::~SplitDataRequest().

◆ usedLoadPorts

template<class Impl>

int LSQ< Impl >::usedLoadPorts

protected

The number of used cache ports in this cycle by loads.

Definition at line 1068 of file lsq.hh.

Referenced by LSQ< Impl >::cachePortAvailable(), LSQ< Impl >::cachePortBusy(), and LSQ< Impl >::tick().

◆ usedStorePorts

template<class Impl>

int LSQ< Impl >::usedStorePorts

protected

The number of used cache ports in this cycle by stores.

Definition at line 1064 of file lsq.hh.

Referenced by LSQ< Impl >::cachePortAvailable(), LSQ< Impl >::cachePortBusy(), LSQ< Impl >::takeOverFrom(), and LSQ< Impl >::tick().

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

cpu/o3/lsq.hh
cpu/o3/lsq_impl.hh

Classes

Public Types

Public Member Functions

Public Attributes

Static Protected Member Functions

Protected Attributes

Detailed Description

template<class Impl> class LSQ< Impl >

Member Typedef Documentation

◆ DynInstPtr

◆ IEW

◆ LSQUnit

◆ O3CPU

Constructor & Destructor Documentation

◆ LSQ()

◆ ~LSQ()

Member Function Documentation

◆ cacheBlocked() [1/2]

◆ cacheBlocked() [2/2]

◆ cachePortAvailable()

◆ cachePortBusy()

◆ commitLoads()

◆ commitStores()

◆ completeDataAccess()

◆ drainSanityCheck()

◆ dumpInsts() [1/2]

◆ dumpInsts() [2/2]

◆ entryAmount()

◆ executeLoad()

◆ executeStore()

◆ getCount() [1/2]

◆ getCount() [2/2]

◆ getDataPort()

◆ getLoadHead()

◆ getLoadHeadSeqNum()

◆ getMemDepViolator()

◆ getStoreHead()

◆ getStoreHeadSeqNum()

◆ hasStoresToWB() [1/2]

◆ hasStoresToWB() [2/2]

◆ insertLoad()

◆ insertStore()

◆ isDrained()

◆ isEmpty()

◆ isFull() [1/2]

◆ isFull() [2/2]

◆ isStalled() [1/2]

◆ isStalled() [2/2]

◆ lqEmpty()

◆ lqFull() [1/2]

◆ lqFull() [2/2]

◆ maxLSQAllocation()

◆ name()

◆ numFreeEntries()

◆ numFreeLoadEntries() [1/2]

◆ numFreeLoadEntries() [2/2]

◆ numFreeStoreEntries() [1/2]

◆ numFreeStoreEntries() [2/2]

◆ numLoads() [1/2]

◆ numLoads() [2/2]

◆ numStores() [1/2]

◆ numStores() [2/2]

◆ numStoresToWB()

◆ pushRequest()

◆ read()

◆ recvReqRetry()

◆ recvTimingResp()

◆ recvTimingSnoopReq()

◆ regStats()

◆ setActiveThreads()

◆ sqEmpty()

◆ sqFull() [1/2]

◆ sqFull() [2/2]

◆ squash()

◆ takeOverFrom()

◆ tick()

◆ violation() [1/2]

◆ violation() [2/2]

◆ willWB() [1/2]

◆ willWB() [2/2]

template<class Impl>
class LSQ< Impl >