#include <memory_manager.hh>

Inheritance diagram for gem5::AMDGPUMemoryManager:

Classes
class	GPUMemPort

struct	RequestStatus

Public Member Functions
	AMDGPUMemoryManager (const AMDGPUMemoryManagerParams &p)

	~AMDGPUMemoryManager ()

void	writeRequest (Addr addr, uint8_t data, int size, Request::Flags flag, Event callback)
	Write size amount of data to device memory at addr using flags and callback.

void	readRequest (Addr addr, uint8_t data, int size, Request::Flags flag, Event callback)
	Read size amount of data from device memory at addr using flags and callback.

RequestorID	getRequestorID () const
	Get the requestorID for the memory manager.

Port &	getPort (const std::string &if_name, PortID idx) override
	Get a port with a given name and index.

Public Member Functions inherited from gem5::ClockedObject
	ClockedObject (const ClockedObjectParams &p)

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

virtual void	init ()
	init() is called after all C++ SimObjects have been created and all ports are connected.

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.

virtual void	regProbePoints ()
	Register probe points for this object.

virtual void	regProbeListeners ()
	Register probe listeners for this object.

ProbeManager *	getProbeManager ()
	Get the probe manager for this object.

virtual void	startup ()
	startup() is the final initialization call before simulation.

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

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)

Public Member Functions inherited from gem5::Serializable
	Serializable ()

virtual	~Serializable ()

void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

void	unserializeSection (CheckpointIn &cp, const std::string &name)

Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.

virtual void	notifyFork ()
	Notify a child process of a fork.

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

void	addStat (statistics::Info *info)
	Register a stat with this group.

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Public Member Functions inherited from gem5::Clocked
void	updateClockPeriod ()
	Update the tick to the current tick.

Tick	clockEdge (Cycles cycles=Cycles(0)) const
	Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle.

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge.

Tick	nextCycle () const
	Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future.

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Private Attributes
GPUMemPort	_gpuMemPort

const int	cacheLineSize

const RequestorID	_requestorId

uint64_t	requestId = 0

std::unordered_map< uint64_t, RequestStatus >	requestStatus

Additional Inherited Members
Public Types inherited from gem5::ClockedObject
using	Params = ClockedObjectParams
	Parameters of ClockedObject.

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain.

void	signalDrainDone () const
	Signal that an object is drained.

Protected Member Functions inherited from gem5::Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters.

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance.

void	resetClock () const
	Reset the object's clock using the current global tick value.

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed.

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

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

Detailed Description

Definition at line 46 of file memory_manager.hh.

Constructor & Destructor Documentation

◆ AMDGPUMemoryManager()

gem5::AMDGPUMemoryManager::AMDGPUMemoryManager ( const AMDGPUMemoryManagerParams & p )

Definition at line 45 of file memory_manager.cc.

◆ ~AMDGPUMemoryManager()

gem5::AMDGPUMemoryManager::~AMDGPUMemoryManager ( )

inline

Definition at line 92 of file memory_manager.hh.

Member Function Documentation

◆ getPort()

Port & gem5::AMDGPUMemoryManager::getPort	(	const std::string &	if_name,
		PortID	idx )

inlineoverridevirtual

Get a port with a given name and index.

This is used at binding time and returns a reference to a protocol-agnostic port.

gem5 has a request and response port interface. All memory objects are connected together via ports. These ports provide a rigid interface between these memory objects. These ports implement three different memory system modes: timing, atomic, and functional. The most important mode is the timing mode and here timing mode is used for conducting cycle-level timing experiments. The other modes are only used in special circumstances and should not be used to conduct cycle-level timing experiments. The other modes are only used in special circumstances. These ports allow SimObjects to communicate with each other.

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from gem5::SimObject.

Definition at line 129 of file memory_manager.hh.

References _gpuMemPort, and gem5::SimObject::getPort().

◆ getRequestorID()

RequestorID gem5::AMDGPUMemoryManager::getRequestorID ( ) const

inline

Get the requestorID for the memory manager.

This ID is used for all packets which should be routed through the device network.

Returns: requestorID of this object.

Definition at line 126 of file memory_manager.hh.

References _requestorId.

Referenced by gem5::AMDGPUDevice::AMDGPUDevice(), and gem5::AMDGPUDevice::vramRequestorId().

◆ readRequest()

void gem5::AMDGPUMemoryManager::readRequest	(	Addr	addr,
		uint8_t *	data,
		int	size,
		Request::Flags	flag,
		Event *	callback )

Read size amount of data from device memory at addr using flags and callback.

Parameters

addr	Device address to read.
data	Pointer to data to read into.
size	Number of bytes to read.
flag	Additional request flags for read packets.
callback	Event callback to call after all bytes are read.

Definition at line 96 of file memory_manager.cc.

References _gpuMemPort, _requestorId, gem5::ChunkGenerator::addr(), gem5::X86ISA::addr, cacheLineSize, gem5::Packet::createRead(), data, gem5::Packet::dataStatic(), gem5::ChunkGenerator::done(), DPRINTF, gem5::ChunkGenerator::last(), gem5::ChunkGenerator::next(), gem5::Packet::pushSenderState(), requestId, requestStatus, gem5::AMDGPUMemoryManager::GPUMemPort::retries, gem5::RequestPort::sendTimingReq(), and gem5::ChunkGenerator::size().

Referenced by gem5::SDMAEngine::copy().

◆ writeRequest()

void gem5::AMDGPUMemoryManager::writeRequest	(	Addr	addr,
		uint8_t *	data,
		int	size,
		Request::Flags	flag,
		Event *	callback )

Write size amount of data to device memory at addr using flags and callback.

Parameters

addr	Device address to write.
data	Pointer to data to write.
size	Number of bytes to write.
flag	Additional request flags for write packets.
callback	Event callback to call after all bytes are written.