gem5  v21.1.0.2
Classes | Public Types | Public Member Functions | Protected Types | Protected Member Functions | Protected Attributes | Friends | List of all members
gem5::X86ISA::TLB Class Reference

#include <tlb.hh>

Inheritance diagram for gem5::X86ISA::TLB:
gem5::BaseTLB gem5::SimObject gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named

Classes

struct  TlbStats
 

Public Types

typedef X86TLBParams Params
 
- Public Types inherited from gem5::SimObject
typedef SimObjectParams Params
 

Public Member Functions

 TLB (const Params &p)
 
void takeOverFrom (BaseTLB *otlb) override
 Take over from an old tlb context. More...
 
TlbEntrylookup (Addr va, bool update_lru=true)
 
void setConfigAddress (uint32_t addr)
 
WalkergetWalker ()
 
void flushAll () override
 Remove all entries from the TLB. More...
 
void flushNonGlobal ()
 
void demapPage (Addr va, uint64_t asn) override
 
void evictLRU ()
 
uint64_t nextSeq ()
 
Fault translateAtomic (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) override
 
Fault translateFunctional (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) override
 
void translateTiming (const RequestPtr &req, ThreadContext *tc, BaseMMU::Translation *translation, BaseMMU::Mode mode) override
 
Fault finalizePhysical (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) const override
 Do post-translation physical address finalization. More...
 
TlbEntryinsert (Addr vpn, const TlbEntry &entry)
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
PortgetTableWalkerPort () override
 Get the table walker port. More...
 
- Public Member Functions inherited from gem5::BaseTLB
void memInvalidate ()
 Invalidate the contents of memory buffers. More...
 
- 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. More...
 
virtual void loadState (CheckpointIn &cp)
 loadState() is called on each SimObject when restoring from a checkpoint. More...
 
virtual void initState ()
 initState() is called on each SimObject when not restoring from a checkpoint. More...
 
virtual void regProbePoints ()
 Register probe points for this object. More...
 
virtual void regProbeListeners ()
 Register probe listeners for this object. More...
 
ProbeManagergetProbeManager ()
 Get the probe manager for this object. More...
 
virtual PortgetPort (const std::string &if_name, PortID idx=InvalidPortID)
 Get a port with a given name and index. More...
 
virtual void startup ()
 startup() is the final initialization call before simulation. More...
 
DrainState drain () override
 Provide a default implementation of the drain interface for objects that don't need draining. More...
 
virtual void memWriteback ()
 Write back dirty buffers to memory using functional writes. More...
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
- 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. More...
 
void setCurTick (Tick newVal)
 
 EventManager (EventManager &em)
 Event manger manages events in the event queue. More...
 
 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. More...
 
void serializeSection (CheckpointOut &cp, const std::string &name) const
 
void unserializeSection (CheckpointIn &cp, const char *name)
 Unserialize an a child object. More...
 
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. More...
 
virtual void notifyFork ()
 Notify a child process of a fork. More...
 
- Public Member Functions inherited from gem5::statistics::Group
 Group (Group *parent, const char *name=nullptr)
 Construct a new statistics group. More...
 
virtual ~Group ()
 
virtual void regStats ()
 Callback to set stat parameters. More...
 
virtual void resetStats ()
 Callback to reset stats. More...
 
virtual void preDumpStats ()
 Callback before stats are dumped. More...
 
void addStat (statistics::Info *info)
 Register a stat with this group. More...
 
const std::map< std::string, Group * > & getStatGroups () const
 Get all child groups associated with this object. More...
 
const std::vector< Info * > & getStats () const
 Get all stats associated with this object. More...
 
void addStatGroup (const char *name, Group *block)
 Add a stat block as a child of this block. More...
 
const InforesolveStat (std::string name) const
 Resolve a stat by its name within this group. More...
 
void mergeStatGroup (Group *block)
 Merge the contents (stats & children) of a block to this block. More...
 
 Group ()=delete
 
 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 Types

typedef std::list< TlbEntry * > EntryList
 

Protected Member Functions

EntryList::iterator lookupIt (Addr va, bool update_lru=true)
 
Fault translateInt (bool read, RequestPtr req, ThreadContext *tc)
 
Fault translate (const RequestPtr &req, ThreadContext *tc, BaseMMU::Translation *translation, BaseMMU::Mode mode, bool &delayedResponse, bool timing)
 
- Protected Member Functions inherited from gem5::BaseTLB
 BaseTLB (const Params &p)
 
- Protected Member Functions inherited from gem5::Drainable
 Drainable ()
 
virtual ~Drainable ()
 
virtual void drainResume ()
 Resume execution after a successful drain. More...
 
void signalDrainDone () const
 Signal that an object is drained. More...
 

Protected Attributes

uint32_t configAddress
 
Walkerwalker
 
uint32_t size
 
std::vector< TlbEntrytlb
 
EntryList freeList
 
TlbEntryTrie trie
 
uint64_t lruSeq
 
AddrRange m5opRange
 
gem5::X86ISA::TLB::TlbStats stats
 
- Protected Attributes inherited from gem5::SimObject
const SimObjectParams & _params
 Cached copy of the object parameters. More...
 
- Protected Attributes inherited from gem5::EventManager
EventQueueeventq
 A pointer to this object's event queue. More...
 

Friends

class Walker
 

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. More...
 
static SimObjectfind (const char *name)
 Find the SimObject with the given name and return a pointer to it. More...
 
static void setSimObjectResolver (SimObjectResolver *resolver)
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
static SimObjectResolvergetSimObjectResolver ()
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
- Static Public Member Functions inherited from gem5::Serializable
static const std::string & currentSection ()
 Gets the fully-qualified name of the active section. More...
 
static void generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
 Generate a checkpoint file so that the serialization can be routed to it. More...
 

Detailed Description

Definition at line 60 of file tlb.hh.

Member Typedef Documentation

◆ EntryList

Definition at line 65 of file tlb.hh.

◆ Params

typedef X86TLBParams gem5::X86ISA::TLB::Params

Definition at line 71 of file tlb.hh.

Constructor & Destructor Documentation

◆ TLB()

gem5::X86ISA::TLB::TLB ( const Params p)

Member Function Documentation

◆ demapPage()

void gem5::X86ISA::TLB::demapPage ( Addr  va,
uint64_t  asn 
)
overridevirtual

◆ evictLRU()

void gem5::X86ISA::TLB::evictLRU ( )

Definition at line 94 of file tlb.cc.

References gem5::ArmISA::i, and gem5::ArmISA::tlb.

◆ finalizePhysical()

Fault gem5::X86ISA::TLB::finalizePhysical ( const RequestPtr req,
ThreadContext tc,
BaseMMU::Mode  mode 
) const
overridevirtual

Do post-translation physical address finalization.

Some addresses, for example requests going to the APIC, need post-translation updates. Such physical addresses are remapped into a "magic" part of the physical address space by this method.

Parameters
reqRequest to updated in-place.
tcThread context that created the request.
modeRequest type (read/write/execute).
Returns
A fault on failure, NoFault otherwise.

Implements gem5::BaseTLB.

Definition at line 261 of file tlb.cc.

References gem5::AddrRange::contains(), gem5::ThreadContext::contextId(), gem5::pseudo_inst::decodeAddrOffset(), gem5::FullSystem, m5opRange, gem5::X86ISA::MISCREG_APIC_BASE, gem5::ArmISA::mode, gem5::NoFault, gem5::X86ISA::PageBytes, gem5::BaseMMU::Read, gem5::ThreadContext::readMiscRegNoEffect(), gem5::Packet::setLE(), gem5::AddrRange::start(), gem5::Request::STRICT_ORDER, gem5::Request::UNCACHEABLE, and gem5::X86ISA::x86LocalAPICAddress().

Referenced by translate(), gem5::ArmISA::TLB::translateMmuOn(), and gem5::ArmISA::TLB::translateSe().

◆ flushAll()

void gem5::X86ISA::TLB::flushAll ( )
overridevirtual

Remove all entries from the TLB.

Implements gem5::BaseTLB.

Definition at line 133 of file tlb.cc.

References DPRINTF, freeList, gem5::ArmISA::i, gem5::Trie< Key, Value >::remove(), size, tlb, and trie.

◆ flushNonGlobal()

void gem5::X86ISA::TLB::flushNonGlobal ( )

Definition at line 152 of file tlb.cc.

References DPRINTF, freeList, gem5::ArmISA::i, gem5::Trie< Key, Value >::remove(), size, tlb, and trie.

◆ getTableWalkerPort()

Port * gem5::X86ISA::TLB::getTableWalkerPort ( )
overridevirtual

Get the table walker port.

This is used for migrating port connections during a CPU takeOverFrom() call. For architectures that do not have a table walker, NULL is returned, hence the use of a pointer rather than a reference. For X86 this method will always return a valid port pointer.

Returns
A pointer to the walker port

Reimplemented from gem5::BaseTLB.

Definition at line 578 of file tlb.cc.

References gem5::X86ISA::Walker::getPort(), and walker.

◆ getWalker()

Walker * gem5::X86ISA::TLB::getWalker ( )

Definition at line 88 of file tlb.cc.

◆ insert()

TlbEntry * gem5::X86ISA::TLB::insert ( Addr  vpn,
const TlbEntry entry 
)

◆ lookup()

TlbEntry * gem5::X86ISA::TLB::lookup ( Addr  va,
bool  update_lru = true 
)

◆ lookupIt()

EntryList::iterator gem5::X86ISA::TLB::lookupIt ( Addr  va,
bool  update_lru = true 
)
protected

◆ nextSeq()

uint64_t gem5::X86ISA::TLB::nextSeq ( )
inline

Definition at line 128 of file tlb.hh.

References lruSeq.

Referenced by lookup().

◆ serialize()

void gem5::X86ISA::TLB::serialize ( CheckpointOut cp) const
overridevirtual

Serialize an object.

Output an object's state into the current checkpoint section.

Parameters
cpCheckpoint state

Implements gem5::Serializable.

Definition at line 541 of file tlb.cc.

References gem5::csprintf(), freeList, lruSeq, SERIALIZE_SCALAR, size, tlb, and gem5::X86ISA::x.

◆ setConfigAddress()

void gem5::X86ISA::TLB::setConfigAddress ( uint32_t  addr)

Definition at line 146 of file tlb.cc.

References gem5::X86ISA::addr, and configAddress.

◆ takeOverFrom()

void gem5::X86ISA::TLB::takeOverFrom ( BaseTLB otlb)
inlineoverridevirtual

Take over from an old tlb context.

Implements gem5::BaseTLB.

Definition at line 74 of file tlb.hh.

◆ translate()

Fault gem5::X86ISA::TLB::translate ( const RequestPtr req,
ThreadContext tc,
BaseMMU::Translation translation,
BaseMMU::Mode  mode,
bool &  delayedResponse,
bool  timing 
)
protected

Definition at line 310 of file tlb.cc.

References gem5::X86ISA::AddrSizeFlagBit, gem5::ArmISA::attr, gem5::X86ISA::base, gem5::bits(), gem5::X86ISA::CPL0FlagBit, DPRINTF, gem5::X86ISA::expandDown, finalizePhysical(), gem5::EmulationPageTable::Entry::flags, gem5::X86ISA::FlagShift, gem5::FullSystem, gem5::ThreadContext::getProcessPtr(), insert(), gem5::ThreadContext::instAddr(), gem5::X86ISA::limit, gem5::X86ISA::TlbEntry::logBytes, lookup(), gem5::X86ISA::mask, gem5::X86ISA::MISCREG_CR0, gem5::X86ISA::MISCREG_M5_REG, gem5::X86ISA::MISCREG_SEG_ATTR(), gem5::X86ISA::MISCREG_SEG_BASE(), gem5::X86ISA::MISCREG_SEG_LIMIT(), gem5::X86ISA::MISCREG_SEG_SEL(), gem5::ArmISA::mode, gem5::NoFault, gem5::X86ISA::offset, gem5::X86ISA::p, gem5::EmulationPageTable::Entry::paddr, gem5::X86ISA::TlbEntry::paddr, gem5::X86ISA::TLB::TlbStats::rdAccesses, gem5::X86ISA::TLB::TlbStats::rdMisses, gem5::BaseMMU::Read, gem5::ThreadContext::readMiscRegNoEffect(), gem5::EmulationPageTable::ReadOnly, gem5::X86ISA::seg, gem5::X86ISA::SEGMENT_REG_ES, gem5::X86ISA::SEGMENT_REG_HS, gem5::X86ISA::SEGMENT_REG_LS, gem5::X86ISA::SEGMENT_REG_MS, gem5::X86ISA::SEGMENT_REG_TSG, gem5::X86ISA::SegmentFlagMask, gem5::X86ISA::SixtyFourBitMode, size, gem5::X86ISA::Walker::start(), stats, gem5::X86ISA::StoreCheck, gem5::Request::STRICT_ORDER, gem5::X86ISA::SYS_SEGMENT_REG_IDTR, translateInt(), gem5::X86ISA::TlbEntry::uncacheable, gem5::EmulationPageTable::Uncacheable, gem5::Request::UNCACHEABLE, gem5::X86ISA::TlbEntry::user, gem5::MipsISA::vaddr, walker, warn_once, gem5::X86ISA::TLB::TlbStats::wrAccesses, gem5::X86ISA::TlbEntry::writable, gem5::BaseMMU::Write, and gem5::X86ISA::TLB::TlbStats::wrMisses.

Referenced by translateAtomic(), and translateTiming().

◆ translateAtomic()

Fault gem5::X86ISA::TLB::translateAtomic ( const RequestPtr req,
ThreadContext tc,
BaseMMU::Mode  mode 
)
overridevirtual

Implements gem5::BaseTLB.

Definition at line 465 of file tlb.cc.

References gem5::ArmISA::mode, and translate().

◆ translateFunctional()

Fault gem5::X86ISA::TLB::translateFunctional ( const RequestPtr req,
ThreadContext tc,
BaseMMU::Mode  mode 
)
overridevirtual

◆ translateInt()

Fault gem5::X86ISA::TLB::translateInt ( bool  read,
RequestPtr  req,
ThreadContext tc 
)
protected

◆ translateTiming()

void gem5::X86ISA::TLB::translateTiming ( const RequestPtr req,
ThreadContext tc,
BaseMMU::Translation translation,
BaseMMU::Mode  mode 
)
overridevirtual

◆ unserialize()

void gem5::X86ISA::TLB::unserialize ( CheckpointIn cp)
overridevirtual

Friends And Related Function Documentation

◆ Walker

friend class Walker
friend

Definition at line 63 of file tlb.hh.

Member Data Documentation

◆ configAddress

uint32_t gem5::X86ISA::TLB::configAddress
protected

Definition at line 67 of file tlb.hh.

Referenced by setConfigAddress(), and translateInt().

◆ freeList

EntryList gem5::X86ISA::TLB::freeList
protected

Definition at line 100 of file tlb.hh.

Referenced by demapPage(), flushAll(), flushNonGlobal(), serialize(), TLB(), and unserialize().

◆ lruSeq

uint64_t gem5::X86ISA::TLB::lruSeq
protected

Definition at line 103 of file tlb.hh.

Referenced by nextSeq(), serialize(), and unserialize().

◆ m5opRange

AddrRange gem5::X86ISA::TLB::m5opRange
protected

Definition at line 105 of file tlb.hh.

Referenced by finalizePhysical().

◆ size

uint32_t gem5::X86ISA::TLB::size
protected

◆ stats

gem5::X86ISA::TLB::TlbStats gem5::X86ISA::TLB::stats
protected

◆ tlb

std::vector<TlbEntry> gem5::X86ISA::TLB::tlb
protected

Definition at line 98 of file tlb.hh.

Referenced by flushAll(), flushNonGlobal(), serialize(), and TLB().

◆ trie

TlbEntryTrie gem5::X86ISA::TLB::trie
protected

Definition at line 102 of file tlb.hh.

Referenced by demapPage(), flushAll(), flushNonGlobal(), lookup(), and unserialize().

◆ walker

Walker* gem5::X86ISA::TLB::walker
protected

Definition at line 84 of file tlb.hh.

Referenced by getTableWalkerPort(), TLB(), translate(), and translateFunctional().


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

Generated on Tue Sep 21 2021 12:35:00 for gem5 by doxygen 1.8.17