gem5::minor::LSQ::LSQRequest Class Reference

Derived SenderState to carry data access info. More...

#include <lsq.hh>

Inheritance diagram for gem5::minor::LSQ::LSQRequest:

Public Types
enum	LSQRequestState {   NotIssued , InTranslation , Translated , Failed ,   RequestIssuing , StoreToStoreBuffer , RequestNeedsRetry , StoreInStoreBuffer ,   StoreBufferIssuing , StoreBufferNeedsRetry , Complete }

Public Member Functions
	LSQRequest (LSQ &port_, MinorDynInstPtr inst_, bool isLoad_, PacketDataPtr data_=NULL, uint64_t *res_=NULL)
virtual	~LSQRequest ()
void	makePacket ()
	Make a packet to use with the memory transaction.
bool	skippedMemAccess ()
	Was no memory access attempted for this request?
void	setSkipped ()
	Set this request as having been skipped before a memory transfer was attempt.
AddrRangeCoverage	containsAddrRangeOf (LSQRequest *other_request)
	Does this request's address range fully cover the range of other_request?
virtual void	startAddrTranslation ()=0
	Start the address translation process for this request.
virtual PacketPtr	getHeadPacket ()=0
	Get the next packet to issue for this request.
virtual void	stepToNextPacket ()=0
	Step to the next packet for the next call to getHeadPacket.
virtual bool	sentAllPackets ()=0
	Have all packets been sent?
virtual bool	hasPacketsInMemSystem ()=0
	True if this request has any issued packets in the memory system and so can't be interrupted until it gets responses.
virtual void	retireResponse (PacketPtr packet_)=0
	Retire a response packet into the LSQRequest packet possibly completing this transfer.
virtual bool	isBarrier ()
	Is this a request a barrier?
bool	needsToBeSentToStoreBuffer ()
	This request, once processed by the requests/transfers queues, will need to go to the store buffer.
void	setState (LSQRequestState new_state)
	Set state and output trace output.
bool	isComplete () const
	Has this request been completed.
void	reportData (std::ostream &os) const
	MinorTrace report interface.
Public Member Functions inherited from gem5::BaseMMU::Translation
virtual	~Translation ()
virtual void	finish (const Fault &fault, const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode)=0
virtual bool	squashed () const
	This function is used by the page table walker to determine if it should translate the a pending request or if the underlying request has been squashed.
Public Member Functions inherited from gem5::Packet::SenderState
	SenderState ()
virtual	~SenderState ()

Static Public Member Functions
static AddrRangeCoverage	containsAddrRangeOf (Addr req1_addr, unsigned int req1_size, Addr req2_addr, unsigned int req2_size)
	Does address range req1 (req1_addr to req1_addr + req1_size - 1) fully cover, partially cover or not cover at all the range req2.

Public Attributes
LSQ &	port
	Owning port.
MinorDynInstPtr	inst
	Instruction which made this request.
bool	isLoad
	Load/store indication used for building packet.
PacketDataPtr	data
	Dynamically allocated and populated data carried for building write packets.
PacketPtr	packet
RequestPtr	request
	The underlying request of this LSQRequest.
uint64_t *	res
	Res from pushRequest.
bool	skipped
	Was skipped.
bool	issuedToMemory
	This in an access other than a normal cacheable load that's visited the memory system.
bool	isTranslationDelayed
	Address translation is delayed due to table walk.
LSQRequestState	state
Public Attributes inherited from gem5::Packet::SenderState
SenderState *	predecessor

Protected Member Functions
void	markDelayed ()
	BaseMMU::Translation interface.
void	tryToSuppressFault ()
	Instructions may want to suppress translation faults (e.g.
void	disableMemAccess ()
void	completeDisabledMemAccess ()

Detailed Description

Derived SenderState to carry data access info.

through address translation, the queues in this port and back from the memory system.

Definition at line 126 of file lsq.hh.

Member Enumeration Documentation

LSQRequestState

enum gem5::minor::LSQ::LSQRequest::LSQRequestState

Enumerator
NotIssued
InTranslation
Translated
Failed
RequestIssuing
StoreToStoreBuffer
RequestNeedsRetry
StoreInStoreBuffer
StoreBufferIssuing
StoreBufferNeedsRetry
Complete

Definition at line 169 of file lsq.hh.

Constructor & Destructor Documentation

LSQRequest()

gem5::minor::LSQ::LSQRequest::LSQRequest	(	LSQ &	port_,
		MinorDynInstPtr	inst_,
		bool	isLoad_,
		PacketDataPtr	data_ = NULL,
		uint64_t *	res_ = NULL )

Definition at line 59 of file lsq.cc.

References data, inst, isLoad, issuedToMemory, isTranslationDelayed, gem5::minor::LSQ::LSQ(), NotIssued, packet, port, request, res, gem5::Packet::SenderState::SenderState(), skipped, and state.

Referenced by containsAddrRangeOf(), gem5::minor::LSQ::SingleDataRequest::SingleDataRequest(), gem5::minor::LSQ::SpecialDataRequest::SpecialDataRequest(), and gem5::minor::LSQ::SplitDataRequest::SplitDataRequest().

~LSQRequest()

gem5::minor::LSQ::LSQRequest::~LSQRequest ( )

virtual

Definition at line 1460 of file lsq.cc.

References data, and packet.

Member Function Documentation

completeDisabledMemAccess()

void gem5::minor::LSQ::LSQRequest::completeDisabledMemAccess ( )

protected

Definition at line 97 of file lsq.cc.

References gem5::PCStateBase::clone(), DPRINTFS, inst, gem5::SimpleThread::pcState(), port, and gem5::minor::ExecContext::setMemAccPredicate().

Referenced by gem5::minor::LSQ::SingleDataRequest::finish(), and gem5::minor::LSQ::SplitDataRequest::finish().

containsAddrRangeOf() [1/2]

LSQ::AddrRangeCoverage gem5::minor::LSQ::LSQRequest::containsAddrRangeOf ( Addr req1_addr, unsigned int req1_size, Addr req2_addr, unsigned int req2_size )

static

Does address range req1 (req1_addr to req1_addr + req1_size - 1) fully cover, partially cover or not cover at all the range req2.

Definition at line 121 of file lsq.cc.

References gem5::minor::LSQ::FullAddrRangeCoverage, gem5::minor::LSQ::NoAddrRangeCoverage, and gem5::minor::LSQ::PartialAddrRangeCoverage.

Referenced by gem5::minor::LSQ::StoreBuffer::canForwardDataToLoad(), and gem5::minor::LSQ::StoreBuffer::forwardStoreData().

containsAddrRangeOf() [2/2]

AddrRangeCoverage gem5::minor::LSQ::LSQRequest::containsAddrRangeOf

(

LSQRequest *

other_request

)

Does this request's address range fully cover the range of other_request?

References LSQRequest().

disableMemAccess()

void gem5::minor::LSQ::LSQRequest::disableMemAccess ( )

protected

Definition at line 114 of file lsq.cc.

References DPRINTFS, inst, and port.

Referenced by gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), and gem5::minor::LSQ::SplitDataRequest::startAddrTranslation().

getHeadPacket()

virtual PacketPtr gem5::minor::LSQ::LSQRequest::getHeadPacket ( )

pure virtual

Get the next packet to issue for this request.

For split transfers, it will be necessary to step through the available packets by calling do { getHeadPacket ; stepToNextPacket } while (!sentAllPackets) and by retiring response using retireResponse

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

Referenced by gem5::minor::LSQ::tryToSend().

hasPacketsInMemSystem()

virtual bool gem5::minor::LSQ::LSQRequest::hasPacketsInMemSystem ( )

pure virtual

True if this request has any issued packets in the memory system and so can't be interrupted until it gets responses.

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

Referenced by gem5::minor::LSQ::recvTimingResp(), and gem5::minor::LSQ::tryToSendToTransfers().

isBarrier()

bool gem5::minor::LSQ::LSQRequest::isBarrier ( )

virtual

Is this a request a barrier?

Reimplemented in gem5::minor::LSQ::BarrierDataRequest.

Definition at line 158 of file lsq.cc.

References inst.

Referenced by gem5::minor::LSQ::StoreBuffer::countIssuedStore(), gem5::minor::LSQ::findResponse(), gem5::minor::LSQ::recvTimingResp(), and gem5::minor::LSQ::StoreBuffer::step().

isComplete()

bool gem5::minor::LSQ::LSQRequest::isComplete

(

)

const

Has this request been completed.

This includes all reasons for completion: successful transfers, faults, skipped because of preceding faults

Definition at line 178 of file lsq.cc.

References Complete, and state.

Referenced by gem5::minor::LSQ::findResponse(), gem5::minor::LSQ::recvTimingResp(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::StoreBuffer::step(), and gem5::minor::LSQ::tryToSendToTransfers().

makePacket()

void gem5::minor::LSQ::LSQRequest::makePacket

(

)

Make a packet to use with the memory transaction.

Definition at line 1729 of file lsq.cc.

References data, inst, isLoad, gem5::minor::makePacketForRequest(), gem5::NoFault, packet, and request.

Referenced by gem5::minor::LSQ::SingleDataRequest::finish(), and gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets().

markDelayed()

void gem5::minor::LSQ::LSQRequest::markDelayed ( )

inlineprotectedvirtual

BaseMMU::Translation interface.

Implements gem5::BaseMMU::Translation.

Definition at line 195 of file lsq.hh.

References isTranslationDelayed.

needsToBeSentToStoreBuffer()

bool gem5::minor::LSQ::LSQRequest::needsToBeSentToStoreBuffer

(

)

This request, once processed by the requests/transfers queues, will need to go to the store buffer.

Definition at line 164 of file lsq.cc.

References state, and StoreToStoreBuffer.

Referenced by gem5::minor::Execute::handleMemResponse().

reportData()

void gem5::minor::LSQ::LSQRequest::reportData

(

std::ostream &

os

)

const

MinorTrace report interface.

Definition at line 186 of file lsq.cc.

References inst, isLoad, gem5::X86ISA::os, and state.

Referenced by gem5::minor::LSQ::StoreBuffer::minorTrace().

retireResponse()

virtual void gem5::minor::LSQ::LSQRequest::retireResponse ( PacketPtr packet_ )

pure virtual

Retire a response packet into the LSQRequest packet possibly completing this transfer.

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

References gem5::X86ISA::os.

Referenced by gem5::minor::LSQ::recvTimingResp().

sentAllPackets()

virtual bool gem5::minor::LSQ::LSQRequest::sentAllPackets ( )

pure virtual

Have all packets been sent?

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

Referenced by gem5::minor::LSQ::StoreBuffer::step(), and gem5::minor::LSQ::tryToSend().

setSkipped()

void gem5::minor::LSQ::LSQRequest::setSkipped ( )

inline

Set this request as having been skipped before a memory transfer was attempt.

Definition at line 219 of file lsq.hh.

References skipped.

Referenced by gem5::minor::LSQ::SplitDataRequest::retireResponse(), and gem5::minor::LSQ::tryToSendToTransfers().

setState()

void gem5::minor::LSQ::LSQRequest::setState

(

LSQRequestState

new_state

)

Set state and output trace output.

Definition at line 170 of file lsq.cc.

References DPRINTFS, inst, port, and state.

Referenced by gem5::minor::LSQ::SingleDataRequest::finish(), gem5::minor::LSQ::SplitDataRequest::finish(), gem5::minor::LSQ::StoreBuffer::insert(), gem5::minor::LSQ::SingleDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), gem5::minor::LSQ::SplitDataRequest::startAddrTranslation(), gem5::minor::LSQ::tryToSend(), and gem5::minor::LSQ::tryToSendToTransfers().

skippedMemAccess()

bool gem5::minor::LSQ::LSQRequest::skippedMemAccess ( )

inline

Was no memory access attempted for this request?

Definition at line 215 of file lsq.hh.

References skipped.

startAddrTranslation()

virtual void gem5::minor::LSQ::LSQRequest::startAddrTranslation ( )

pure virtual

Start the address translation process for this request.

This will issue a translation request to the TLB.

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

Referenced by gem5::minor::LSQ::pushRequest().

stepToNextPacket()

virtual void gem5::minor::LSQ::LSQRequest::stepToNextPacket ( )

pure virtual

Step to the next packet for the next call to getHeadPacket.

Implemented in gem5::minor::LSQ::SingleDataRequest, gem5::minor::LSQ::SpecialDataRequest, and gem5::minor::LSQ::SplitDataRequest.

Referenced by gem5::minor::LSQ::tryToSend().

tryToSuppressFault()

void gem5::minor::LSQ::LSQRequest::tryToSuppressFault ( )

protected

Instructions may want to suppress translation faults (e.g.

non-faulting vector loads).

Definition at line 78 of file lsq.cc.

References gem5::PCStateBase::clone(), DPRINTFS, inst, gem5::NoFault, gem5::SimpleThread::pcState(), and port.

Referenced by gem5::minor::LSQ::SingleDataRequest::finish(), and gem5::minor::LSQ::SplitDataRequest::finish().

Member Data Documentation

data

PacketDataPtr gem5::minor::LSQ::LSQRequest::data

Dynamically allocated and populated data carried for building write packets.

Definition at line 143 of file lsq.hh.

Referenced by LSQRequest(), gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets(), makePacket(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), and ~LSQRequest().

inst

MinorDynInstPtr gem5::minor::LSQ::LSQRequest::inst

Instruction which made this request.

Definition at line 135 of file lsq.hh.

Referenced by gem5::minor::LSQ::StoreBuffer::canForwardDataToLoad(), completeDisabledMemAccess(), gem5::minor::LSQ::StoreBuffer::deleteRequest(), disableMemAccess(), gem5::minor::LSQ::findResponse(), gem5::minor::LSQ::SingleDataRequest::finish(), gem5::minor::LSQ::SplitDataRequest::finish(), gem5::minor::LSQ::StoreBuffer::insert(), isBarrier(), LSQRequest(), gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets(), makePacket(), gem5::minor::LSQ::popResponse(), gem5::minor::LSQ::recvTimingResp(), reportData(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::sendNextFragmentToTranslation(), gem5::minor::LSQ::sendStoreToStoreBuffer(), setState(), gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), gem5::minor::LSQ::StoreBuffer::step(), gem5::minor::LSQ::threadSnoop(), gem5::minor::LSQ::tryToSend(), gem5::minor::LSQ::tryToSendToTransfers(), and tryToSuppressFault().

isLoad

bool gem5::minor::LSQ::LSQRequest::isLoad

Load/store indication used for building packet.

This isn't carried by Request so we need to keep it here

Definition at line 139 of file lsq.hh.

Referenced by gem5::minor::LSQ::StoreBuffer::forwardStoreData(), LSQRequest(), gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets(), makePacket(), gem5::minor::LSQ::moveFromRequestsToTransfers(), gem5::minor::LSQ::popResponse(), reportData(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::sendNextFragmentToTranslation(), gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), gem5::minor::LSQ::tryToSend(), and gem5::minor::LSQ::tryToSendToTransfers().

issuedToMemory

bool gem5::minor::LSQ::LSQRequest::issuedToMemory

This in an access other than a normal cacheable load that's visited the memory system.

Definition at line 164 of file lsq.hh.

Referenced by LSQRequest(), gem5::minor::LSQ::popResponse(), and gem5::minor::LSQ::tryToSendToTransfers().

isTranslationDelayed

bool gem5::minor::LSQ::LSQRequest::isTranslationDelayed

Address translation is delayed due to table walk.

Definition at line 167 of file lsq.hh.

Referenced by gem5::minor::LSQ::SingleDataRequest::finish(), gem5::minor::LSQ::SplitDataRequest::finish(), LSQRequest(), and markDelayed().

packet

PacketPtr gem5::minor::LSQ::LSQRequest::packet

Definition at line 149 of file lsq.hh.

Referenced by gem5::minor::LSQ::StoreBuffer::canForwardDataToLoad(), gem5::minor::LSQ::StoreBuffer::forwardStoreData(), gem5::minor::LSQ::SingleDataRequest::getHeadPacket(), gem5::minor::Execute::handleMemResponse(), LSQRequest(), makePacket(), gem5::minor::LSQ::SingleDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::threadSnoop(), gem5::minor::LSQ::tryToSendToTransfers(), and ~LSQRequest().

port

LSQ& gem5::minor::LSQ::LSQRequest::port

Owning port.

Definition at line 132 of file lsq.hh.

Referenced by completeDisabledMemAccess(), disableMemAccess(), gem5::minor::LSQ::SingleDataRequest::finish(), gem5::minor::LSQ::SplitDataRequest::finish(), LSQRequest(), gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets(), gem5::minor::LSQ::SplitDataRequest::makeFragmentRequests(), gem5::minor::LSQ::SingleDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::SplitDataRequest::sendNextFragmentToTranslation(), setState(), gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), and tryToSuppressFault().

request

RequestPtr gem5::minor::LSQ::LSQRequest::request

The underlying request of this LSQRequest.

Definition at line 152 of file lsq.hh.

Referenced by gem5::minor::LSQ::StoreBuffer::canForwardDataToLoad(), gem5::minor::LSQ::StoreBuffer::forwardStoreData(), LSQRequest(), gem5::minor::LSQ::SplitDataRequest::makeFragmentPackets(), gem5::minor::LSQ::SplitDataRequest::makeFragmentRequests(), makePacket(), gem5::minor::LSQ::pushRequest(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), gem5::minor::LSQ::SingleDataRequest::startAddrTranslation(), gem5::minor::LSQ::tryToSend(), and gem5::minor::LSQ::tryToSendToTransfers().

res

uint64_t* gem5::minor::LSQ::LSQRequest::res

Res from pushRequest.

Definition at line 155 of file lsq.hh.

Referenced by LSQRequest().

skipped

bool gem5::minor::LSQ::LSQRequest::skipped

Was skipped.

Set to indicate any reason (faulted, bad stream sequence number, in a fault shadow) that this request did not perform a memory transfer

Definition at line 160 of file lsq.hh.

Referenced by LSQRequest(), gem5::minor::LSQ::SplitDataRequest::retireResponse(), setSkipped(), and skippedMemAccess().

state

LSQRequestState gem5::minor::LSQ::LSQRequest::state

Definition at line 191 of file lsq.hh.

Referenced by gem5::minor::LSQ::BarrierDataRequest::BarrierDataRequest(), gem5::minor::LSQ::FailedDataRequest::FailedDataRequest(), gem5::minor::LSQ::findResponse(), gem5::minor::LSQ::StoreBuffer::insert(), isComplete(), LSQRequest(), needsToBeSentToStoreBuffer(), gem5::minor::LSQ::popResponse(), gem5::minor::LSQ::recvTimingResp(), reportData(), gem5::minor::LSQ::sendStoreToStoreBuffer(), setState(), gem5::minor::LSQ::StoreBuffer::step(), gem5::minor::LSQ::tryToSend(), and gem5::minor::LSQ::tryToSendToTransfers().

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

• cpu/minor/lsq.hh
• cpu/minor/lsq.cc