CoherenceProtocol Class Reference

The base class for coherence protocols. More...

#include <coherence_protocol.h>

Inheritance diagram for CoherenceProtocol:

Collaboration diagram for CoherenceProtocol:

Public Member Functions
	CoherenceProtocol (CacheABC &cache)
	Construct a new coherence protocol. More...
virtual void	PrRd (cache_line *line)=0
	Receive a PrRd message. More...
virtual void	PrWr (cache_line *line)=0
	Receive a PrWr message. More...
virtual bool	BusRd (cache_line *line)=0
	Receive a BusRd message. More...
virtual bool	BusRdX (cache_line *line)
	Receive a BusRdX message. More...
virtual bool	BusUpdt (cache_line *line)
	Receive a BusUpdt message. More...
virtual bool	BusUpgr (cache_line *line)
	Receive a BusUpgr message. More...
virtual bool	BusWr (cache_line *line)
	Receive a BusWr message. More...
virtual bool	doesDirtySharing ()
	Determine whether the coherence protocol does dirty sharing. More...
virtual bool	doesWriteNoAllocate ()
	Determine whether the coherence protocol uses write no-allocate. More...
virtual bool	isWriteBackNeeded (state_e state)=0
	Determine whether a line needs to be written back to main memory. More...

Protected Attributes
CacheABC &	cache
	The parent cache.

Detailed Description

The base class for coherence protocols.

Constructor & Destructor Documentation

CoherenceProtocol()

CoherenceProtocol::CoherenceProtocol ( CacheABC &  cache )

inline

Construct a new coherence protocol.

Parameters

cache

The parent cache

Member Function Documentation

BusRd()

virtual bool CoherenceProtocol::BusRd ( cache_line *  line )

pure virtual

Receive a BusRd message.

Parameters

line	The cache line accessed

Returns

True if the line was flushed to the bus

Implemented in WriteThrough, MSIUpgr, MSI, MOSI, MOESI, MESI, and Dragon.

BusRdX()

virtual bool CoherenceProtocol::BusRdX ( cache_line *  line )

inlinevirtual

Receive a BusRdX message.

Parameters

line	The cache line accessed

Returns

True if the line was flushed to the bus

Reimplemented in MSIUpgr, MSI, MOSI, MOESI, and MESI.

BusUpdt()

virtual bool CoherenceProtocol::BusUpdt ( cache_line *  line )

inlinevirtual

Receive a BusUpdt message.

Parameters

line	The cache line accessed

Returns

True if the line was flushed to the bus

Reimplemented in Dragon.

BusUpgr()

virtual bool CoherenceProtocol::BusUpgr ( cache_line *  line )

inlinevirtual

Receive a BusUpgr message.

Parameters

line	The cache line accessed

Returns

True if the line was flushed to the bus

Reimplemented in MSIUpgr, MOSI, MOESI, and MESI.

BusWr()

virtual bool CoherenceProtocol::BusWr ( cache_line *  line )

inlinevirtual

Receive a BusWr message.

Parameters

line	The cache line accessed

Returns

True if the line was flushed to the bus

Reimplemented in WriteThrough.

doesDirtySharing()

virtual bool CoherenceProtocol::doesDirtySharing ( )

inlinevirtual

Determine whether the coherence protocol does dirty sharing.

Returns

True if the coherence protocol does dirty sharing

Reimplemented in MOSI, MOESI, and Dragon.

doesWriteNoAllocate()

virtual bool CoherenceProtocol::doesWriteNoAllocate ( )

inlinevirtual

Determine whether the coherence protocol uses write no-allocate.

Returns

True if the coherence protocol uses write no-allocate

Reimplemented in WriteThrough.

isWriteBackNeeded()

virtual bool CoherenceProtocol::isWriteBackNeeded ( state_e  state )

pure virtual

Determine whether a line needs to be written back to main memory.

Parameters

state

The state of the line

Returns

Whether the line needs to be written back to main memory

Implemented in WriteThrough, MSIUpgr, MSI, MOSI, MOESI, MESI, and Dragon.

PrRd()

virtual void CoherenceProtocol::PrRd ( cache_line *  line )

pure virtual

Receive a PrRd message.

Parameters

line	The cache line accessed (non-null)

Implemented in WriteThrough, MSIUpgr, MSI, MOSI, MOESI, MESI, and Dragon.

PrWr()

virtual void CoherenceProtocol::PrWr ( cache_line *  line )

pure virtual

Receive a PrWr message.

Parameters

line	The cache line accessed

Implemented in WriteThrough, MSIUpgr, MSI, MOSI, MOESI, MESI, and Dragon.

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

• src/coherence/coherence_protocol.h