gem5 v24.1.0.1
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Public Types | Public Member Functions | Protected Member Functions | Private Attributes | List of all members
gem5::BTBSetAssociative Class Reference

#include <btb_entry.hh>

Inheritance diagram for gem5::BTBSetAssociative:
gem5::IndexingPolicyTemplate< Types > gem5::SimObject gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named

Public Types

using KeyType = BTBTagType::KeyType
 
- Public Types inherited from gem5::SimObject
typedef SimObjectParams Params
 

Public Member Functions

 PARAMS (BTBSetAssociative)
 
 BTBSetAssociative (const Params &p)
 
std::vector< ReplaceableEntry * > getPossibleEntries (const KeyType &key) const override
 Find all possible entries for insertion and replacement of an address.
 
void setNumThreads (unsigned num_threads)
 Set number of threads sharing the BTB.
 
Addr extractTag (const Addr addr) const override
 Generate the tag from the given address.
 
Addr regenerateAddr (const KeyType &key, const ReplaceableEntry *entry) const override
 
- Public Member Functions inherited from gem5::IndexingPolicyTemplate< Types >
 IndexingPolicyTemplate (const Params &p, uint32_t num_entries, int set_shift)
 Construct and initialize this policy.
 
 ~IndexingPolicyTemplate ()
 Destructor.
 
void setEntry (ReplaceableEntry *entry, const uint64_t index)
 Associate a pointer to an entry to its physical counterpart.
 
ReplaceableEntrygetEntry (const uint32_t set, const uint32_t way) const
 Get an entry based on its set and way.
 
virtual std::vector< ReplaceableEntry * > getPossibleEntries (const KeyType &key) const =0
 Find all possible entries for insertion and replacement of an address.
 
virtual Addr regenerateAddr (const KeyType &key, const ReplaceableEntry *entry) const =0
 Regenerate an entry's address from its tag and assigned indexing bits.
 
- Public Member Functions inherited from gem5::SimObject
const Paramsparams () 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.
 
ProbeManagergetProbeManager ()
 Get the probe manager for this object.
 
virtual PortgetPort (const std::string &if_name, PortID idx=InvalidPortID)
 Get a port with a given name and index.
 
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
EventQueueeventQueue () 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 InforesolveStat (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 (const Group &)=delete
 
Groupoperator= (const Group &)=delete
 
- Public Member Functions inherited from gem5::Named
 Named (const std::string &name_)
 
virtual ~Named ()=default
 
virtual std::string name () const
 

Protected Member Functions

uint32_t extractSet (const KeyType &key) const
 Extract the set index for the instruction PC based on tid.
 
- 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.
 

Private Attributes

const uint64_t tagMask
 
unsigned log2NumThreads
 

Additional Inherited Members

- 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 SimObjectfind (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 SimObjectResolvergetSimObjectResolver ()
 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.
 
- Protected Types inherited from gem5::IndexingPolicyTemplate< Types >
using KeyType = typename Types::KeyType
 
using Params = typename Types::Params
 
- Protected Attributes inherited from gem5::IndexingPolicyTemplate< Types >
const unsigned assoc
 The associativity.
 
const uint32_t numSets
 The number of sets in the cache.
 
const int setShift
 The amount to shift the address to get the set.
 
const unsigned setMask
 Mask out all bits that aren't part of the set index.
 
std::vector< std::vector< ReplaceableEntry * > > sets
 The cache sets.
 
const int tagShift
 The amount to shift the address to get the tag.
 
- Protected Attributes inherited from gem5::SimObject
const SimObjectParams & _params
 Cached copy of the object parameters.
 
- Protected Attributes inherited from gem5::EventManager
EventQueueeventq
 A pointer to this object's event queue.
 

Detailed Description

Definition at line 73 of file btb_entry.hh.

Member Typedef Documentation

◆ KeyType

Definition at line 77 of file btb_entry.hh.

Constructor & Destructor Documentation

◆ BTBSetAssociative()

gem5::BTBSetAssociative::BTBSetAssociative ( const Params p)
inline

Definition at line 79 of file btb_entry.hh.

References gem5::MipsISA::p.

Member Function Documentation

◆ extractSet()

uint32_t gem5::BTBSetAssociative::extractSet ( const KeyType key) const
inlineprotected

Extract the set index for the instruction PC based on tid.

Definition at line 91 of file btb_entry.hh.

References gem5::BTBTagType::KeyType::address, and gem5::BTBTagType::KeyType::tid.

◆ extractTag()

Addr gem5::BTBSetAssociative::extractTag ( const Addr  addr) const
inlineoverridevirtual

Generate the tag from the given address.

Reimplemented from gem5::IndexingPolicyTemplate< Types >.

Definition at line 125 of file btb_entry.hh.

References gem5::X86ISA::addr.

◆ getPossibleEntries()

std::vector< ReplaceableEntry * > gem5::BTBSetAssociative::getPossibleEntries ( const KeyType key) const
inlineoverride

Find all possible entries for insertion and replacement of an address.

Definition at line 103 of file btb_entry.hh.

◆ PARAMS()

gem5::BTBSetAssociative::PARAMS ( BTBSetAssociative  )

◆ regenerateAddr()

Addr gem5::BTBSetAssociative::regenerateAddr ( const KeyType key,
const ReplaceableEntry entry 
) const
inlineoverride

Definition at line 130 of file btb_entry.hh.

References panic.

◆ setNumThreads()

void gem5::BTBSetAssociative::setNumThreads ( unsigned  num_threads)
inline

Set number of threads sharing the BTB.

Definition at line 116 of file btb_entry.hh.

References gem5::log2i().

Member Data Documentation

◆ log2NumThreads

unsigned gem5::BTBSetAssociative::log2NumThreads
private

Definition at line 139 of file btb_entry.hh.

◆ tagMask

const uint64_t gem5::BTBSetAssociative::tagMask
private

Definition at line 138 of file btb_entry.hh.


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

Generated on Mon Jan 13 2025 04:28:49 for gem5 by doxygen 1.9.8