gem5  v21.1.0.2
Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | Private Attributes | List of all members
gem5::MuxingKvmGic Class Reference

#include <gic.hh>

Inheritance diagram for gem5::MuxingKvmGic:
gem5::GicV2 gem5::BaseGic gem5::BaseGicRegisters gem5::PioDevice gem5::ClockedObject gem5::SimObject gem5::Clocked gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named

Public Member Functions

 MuxingKvmGic (const MuxingKvmGicParams &p)
 
 ~MuxingKvmGic ()
 
void startup () override
 startup() is the final initialization call before simulation. More...
 
DrainState drain () override
 Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight. More...
 
void drainResume () override
 Resume execution after a successful drain. More...
 
Tick read (PacketPtr pkt) override
 Pure virtual function that the device must implement. More...
 
Tick write (PacketPtr pkt) override
 Pure virtual function that the device must implement. More...
 
void sendInt (uint32_t num) override
 Post an interrupt from a device that is connected to the GIC. More...
 
void clearInt (uint32_t num) override
 Clear an interrupt from a device that is connected to the GIC. More...
 
void sendPPInt (uint32_t num, uint32_t cpu) override
 Interface call for private peripheral interrupts. More...
 
void clearPPInt (uint32_t num, uint32_t cpu) override
 
- Public Member Functions inherited from gem5::GicV2
 GicV2 (const Params &p)
 
 ~GicV2 ()
 
DrainState drain () override
 Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight. More...
 
void drainResume () override
 Resume execution after a successful drain. More...
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
AddrRangeList getAddrRanges () const override
 Every PIO device is obliged to provide an implementation that returns the address ranges the device responds to. More...
 
Tick read (PacketPtr pkt) override
 A PIO read to the device, immediately split up into readDistributor() or readCpu() More...
 
Tick write (PacketPtr pkt) override
 A PIO read to the device, immediately split up into writeDistributor() or writeCpu() More...
 
void sendInt (uint32_t number) override
 Post an interrupt from a device that is connected to the GIC. More...
 
void clearInt (uint32_t number) override
 Clear an interrupt from a device that is connected to the GIC. More...
 
void sendPPInt (uint32_t num, uint32_t cpu) override
 Interface call for private peripheral interrupts. More...
 
void clearPPInt (uint32_t num, uint32_t cpu) override
 
bool supportsVersion (GicVersion version) override
 Check if version supported. More...
 
- Public Member Functions inherited from gem5::BaseGic
 BaseGic (const Params &p)
 
virtual ~BaseGic ()
 
void init () override
 init() is called after all C++ SimObjects have been created and all ports are connected. More...
 
const Paramsparams () const
 
ArmSystemgetSystem () const
 
- Public Member Functions inherited from gem5::PioDevice
 PioDevice (const Params &p)
 
virtual ~PioDevice ()
 
void init () override
 init() is called after all C++ SimObjects have been created and all ports are connected. More...
 
PortgetPort (const std::string &if_name, PortID idx=InvalidPortID) override
 Get a port with a given name and index. More...
 
- Public Member Functions inherited from gem5::ClockedObject
 ClockedObject (const ClockedObjectParams &p)
 
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::SimObject
const Paramsparams () const
 
 SimObject (const Params &p)
 
virtual ~SimObject ()
 
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...
 
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...
 
virtual void memInvalidate ()
 Invalidate the contents of memory buffers. 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
 
- Public Member Functions inherited from gem5::Clocked
void updateClockPeriod ()
 Update the tick to the current tick. More...
 
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. More...
 
Cycles curCycle () const
 Determine the current cycle, corresponding to a tick aligned to a clock edge. More...
 
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. More...
 
uint64_t frequency () const
 
Tick clockPeriod () const
 
double voltage () const
 
Cycles ticksToCycles (Tick t) const
 
Tick cyclesToTicks (Cycles c) const
 

Protected Member Functions

void updateIntState (int hint) override
 See if some processor interrupt flags need to be enabled/disabled. More...
 
- Protected Member Functions inherited from gem5::GicV2
 BitUnion32 (SWI) Bitfield< 3
 
 EndBitUnion (SWI) BitUnion32(IAR) Bitfield< 9
 
 EndBitUnion (IAR) BitUnion32(CTLR) Bitfield< 3 > fiqEn
 
BankedRegsgetBankedRegs (ContextID)
 
uint32_t & getIntEnabled (ContextID ctx, uint32_t ix)
 
uint32_t & getPendingInt (ContextID ctx, uint32_t ix)
 
uint32_t & getActiveInt (ContextID ctx, uint32_t ix)
 
uint32_t & getIntGroup (ContextID ctx, uint32_t ix)
 
uint8_t & getIntPriority (ContextID ctx, uint32_t ix)
 
uint32_t & getIntConfig (ContextID ctx, uint32_t ix)
 Reads the GICD_ICFGRn register. More...
 
uint8_t getCpuTarget (ContextID ctx, uint32_t ix) const
 
bool isLevelSensitive (ContextID ctx, uint32_t int_num)
 
bool isGroup0 (ContextID ctx, uint32_t int_num)
 
bool isFiq (ContextID ctx, uint32_t int_num)
 This method checks if an interrupt ID must be signaled or has been signaled as a FIQ to the cpu. More...
 
bool cpuEnabled (ContextID ctx) const
 CPU enabled: Checks if GICC_CTLR.EnableGrp0 or EnableGrp1 are set. More...
 
uint8_t getCpuPriority (unsigned cpu)
 
void softInt (ContextID ctx, SWI swi)
 software generated interrupt More...
 
void updateRunPri ()
 Update the register that records priority of the highest priority active interrupt. More...
 
uint64_t genSwiMask (int cpu)
 generate a bit mask to check cpuSgi for an interrupt. More...
 
int intNumToWord (int num) const
 
int intNumToBit (int num) const
 
void clearInt (ContextID ctx, uint32_t int_num)
 Clears a cpu IRQ or FIQ signal. More...
 
void postInt (uint32_t cpu, Tick when)
 Post an interrupt to a CPU with a delay. More...
 
void postFiq (uint32_t cpu, Tick when)
 
void postDelayedInt (uint32_t cpu)
 Deliver a delayed interrupt to the target CPU. More...
 
void postDelayedFiq (uint32_t cpu)
 
Tick readDistributor (PacketPtr pkt)
 Handle a read to the distributor portion of the GIC. More...
 
uint32_t readDistributor (ContextID ctx, Addr daddr, size_t resp_sz)
 
uint32_t readDistributor (ContextID ctx, Addr daddr) override
 
Tick readCpu (PacketPtr pkt)
 Handle a read to the cpu portion of the GIC. More...
 
uint32_t readCpu (ContextID ctx, Addr daddr) override
 
Tick writeDistributor (PacketPtr pkt)
 Handle a write to the distributor portion of the GIC. More...
 
void writeDistributor (ContextID ctx, Addr daddr, uint32_t data, size_t data_sz)
 
void writeDistributor (ContextID ctx, Addr daddr, uint32_t data) override
 
Tick writeCpu (PacketPtr pkt)
 Handle a write to the cpu portion of the GIC. More...
 
void writeCpu (ContextID ctx, Addr daddr, uint32_t data) override
 
- Protected Member Functions inherited from gem5::Drainable
 Drainable ()
 
virtual ~Drainable ()
 
void signalDrainDone () const
 Signal that an object is drained. More...
 
- Protected Member Functions inherited from gem5::Clocked
 Clocked (ClockDomain &clk_domain)
 Create a clocked object and set the clock domain based on the parameters. More...
 
 Clocked (Clocked &)=delete
 
Clockedoperator= (Clocked &)=delete
 
virtual ~Clocked ()
 Virtual destructor due to inheritance. More...
 
void resetClock () const
 Reset the object's clock using the current global tick value. More...
 
virtual void clockPeriodUpdated ()
 A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed. More...
 

Protected Attributes

Systemsystem
 System this interrupt controller belongs to. More...
 
KvmKernelGicV2kernelGic
 Kernel GIC device. More...
 
- Protected Attributes inherited from gem5::GicV2
const uint32_t gicdPIDR
 
const uint32_t gicdIIDR
 
const uint32_t giccIIDR
 
 sgi_id
 
Bitfield< 23, 16 > cpu_list
 
Bitfield< 25, 24 > list_type
 
 ack_id
 
Bitfield< 12, 10 > cpu_id
 
Bitfield< 1 > enableGrp1
 
Bitfield< 0 > enableGrp0
 
const EndBitUnion(CTLR) protected AddrRange cpuRange
 Address range for the distributor interface. More...
 
const AddrRangeList addrRanges
 All address ranges used by this GIC. More...
 
const Tick distPioDelay
 Latency for a distributor operation. More...
 
const Tick cpuPioDelay
 Latency for a cpu operation. More...
 
const Tick intLatency
 Latency for a interrupt to get to CPU. More...
 
bool enabled
 Gic enabled. More...
 
const bool haveGem5Extensions
 Are gem5 extensions available? More...
 
bool gem5ExtensionsEnabled
 gem5 many-core extension enabled by driver More...
 
uint32_t itLines
 Number of itLines enabled. More...
 
std::vector< BankedRegs * > bankedRegs
 
uint32_t intEnabled [INT_BITS_MAX-1]
 GICD_I{S,C}ENABLER{1..31} interrupt enable bits for global interrupts 1b per interrupt, 32 bits per word, 31 words. More...
 
uint32_t pendingInt [INT_BITS_MAX-1]
 GICD_I{S,C}PENDR{1..31} interrupt pending bits for global interrupts 1b per interrupt, 32 bits per word, 31 words. More...
 
uint32_t activeInt [INT_BITS_MAX-1]
 GICD_I{S,C}ACTIVER{1..31} interrupt active bits for global interrupts 1b per interrupt, 32 bits per word, 31 words. More...
 
uint32_t intGroup [INT_BITS_MAX-1]
 GICD_IGROUPR{1..31} interrupt group bits for global interrupts 1b per interrupt, 32 bits per word, 31 words. More...
 
uint32_t iccrpr [CPU_MAX]
 read only running priority register, 1 per cpu More...
 
uint8_t intPriority [GLOBAL_INT_LINES]
 GICD_IPRIORITYR{8..255} an 8 bit priority (lower is higher priority) for each of the global (not replicated per CPU) interrupts. More...
 
uint32_t intConfig [INT_BITS_MAX *2 - 2]
 GICD_ICFGR{2...63} 2 bit per interrupt signaling if it's level or edge sensitive and if it is 1:N or N:N. More...
 
uint8_t cpuTarget [GLOBAL_INT_LINES]
 GICD_ITARGETSR{8..255} an 8 bit cpu target id for each global interrupt. More...
 
CTLR cpuControl [CPU_MAX]
 GICC_CTLR: CPU interface control register. More...
 
uint8_t cpuPriority [CPU_MAX]
 CPU priority. More...
 
uint8_t cpuBpr [CPU_MAX]
 Binary point registers. More...
 
uint32_t cpuHighestInt [CPU_MAX]
 highest interrupt that is interrupting CPU More...
 
uint64_t cpuSgiPending [SGI_MAX]
 One bit per cpu per software interrupt that is pending for each possible sgi source. More...
 
uint64_t cpuSgiActive [SGI_MAX]
 
uint32_t cpuSgiPendingExt [CPU_MAX]
 SGI pending arrays for gem5 GIC extension mode, which instead keeps 16 SGI pending bits for each of the (large number of) CPUs. More...
 
uint32_t cpuSgiActiveExt [CPU_MAX]
 
uint32_t cpuPpiPending [CPU_MAX]
 One bit per private peripheral interrupt. More...
 
uint32_t cpuPpiActive [CPU_MAX]
 
EventFunctionWrapperpostIntEvent [CPU_MAX]
 
EventFunctionWrapperpostFiqEvent [CPU_MAX]
 
int pendingDelayedInterrupts
 
- Protected Attributes inherited from gem5::BaseGic
Platformplatform
 Platform this GIC belongs to. More...
 
- Protected Attributes inherited from gem5::PioDevice
Systemsys
 
PioPort< PioDevicepioPort
 The pioPort that handles the requests for us and provides us requests that it sees. More...
 
- 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...
 

Private Member Functions

void fromGicV2ToKvm ()
 Multiplexing implementation. More...
 
void fromKvmToGicV2 ()
 
void copyGicState (BaseGicRegisters *from, BaseGicRegisters *to)
 
void copyDistRegister (BaseGicRegisters *from, BaseGicRegisters *to, ContextID ctx, Addr daddr)
 
void copyCpuRegister (BaseGicRegisters *from, BaseGicRegisters *to, ContextID ctx, Addr daddr)
 
void copyBankedDistRange (BaseGicRegisters *from, BaseGicRegisters *to, Addr daddr, size_t size)
 
void clearBankedDistRange (BaseGicRegisters *to, Addr daddr, size_t size)
 
void copyDistRange (BaseGicRegisters *from, BaseGicRegisters *to, Addr daddr, size_t size)
 
void clearDistRange (BaseGicRegisters *to, Addr daddr, size_t size)
 

Private Attributes

bool usingKvm
 

Additional Inherited Members

- Public Types inherited from gem5::GicV2
using Params = GicV2Params
 
- Public Types inherited from gem5::BaseGic
enum  GicVersion { GicVersion::GIC_V2, GicVersion::GIC_V3, GicVersion::GIC_V4 }
 
typedef BaseGicParams Params
 
- Public Types inherited from gem5::PioDevice
using Params = PioDeviceParams
 
- Public Types inherited from gem5::ClockedObject
using Params = ClockedObjectParams
 Parameters of ClockedObject. More...
 
- 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. 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...
 
- Public Attributes inherited from gem5::ClockedObject
PowerStatepowerState
 
- Protected Types inherited from gem5::GicV2
enum  {
  GICD_CTLR = 0x000, GICD_TYPER = 0x004, GICD_IIDR = 0x008, GICD_SGIR = 0xf00,
  GICD_PIDR0 = 0xfe0, GICD_PIDR1 = 0xfe4, GICD_PIDR2 = 0xfe8, GICD_PIDR3 = 0xfec,
  DIST_SIZE = 0x1000
}
 
enum  {
  GICC_CTLR = 0x00, GICC_PMR = 0x04, GICC_BPR = 0x08, GICC_IAR = 0x0C,
  GICC_EOIR = 0x10, GICC_RPR = 0x14, GICC_HPPIR = 0x18, GICC_ABPR = 0x1c,
  GICC_APR0 = 0xd0, GICC_APR1 = 0xd4, GICC_APR2 = 0xd8, GICC_APR3 = 0xdc,
  GICC_IIDR = 0xfc, GICC_DIR = 0x1000
}
 
- Static Protected Attributes inherited from gem5::GicV2
static const AddrRange GICD_IGROUPR
 
static const AddrRange GICD_ISENABLER
 
static const AddrRange GICD_ICENABLER
 
static const AddrRange GICD_ISPENDR
 
static const AddrRange GICD_ICPENDR
 
static const AddrRange GICD_ISACTIVER
 
static const AddrRange GICD_ICACTIVER
 
static const AddrRange GICD_IPRIORITYR
 
static const AddrRange GICD_ITARGETSR
 
static const AddrRange GICD_ICFGR
 
static const int SGI_MAX = 16
 
static const int PPI_MAX = 16
 
static const int SGI_MASK = 0xFFFF0000
 Mask off SGI's when setting/clearing pending bits. More...
 
static const int NN_CONFIG_MASK = 0x55555555
 Mask for bits that config N:N mode in GICD_ICFGR's. More...
 
static const int CPU_MAX = 256
 
static const int SPURIOUS_INT = 1023
 
static const int INT_BITS_MAX = 32
 
static const int INT_LINES_MAX = 1020
 
static const int GLOBAL_INT_LINES = INT_LINES_MAX - SGI_MAX - PPI_MAX
 
static const int GICC_BPR_MINIMUM = 2
 minimum value for Binary Point Register ("IMPLEMENTATION DEFINED"); chosen for consistency with Linux's in-kernel KVM GIC model More...
 

Detailed Description

Definition at line 171 of file gic.hh.

Constructor & Destructor Documentation

◆ MuxingKvmGic()

gem5::MuxingKvmGic::MuxingKvmGic ( const MuxingKvmGicParams &  p)

Definition at line 170 of file gic.cc.

References gem5::System::getKvmVM(), kernelGic, gem5::MipsISA::p, system, and gem5::ArmISA::vm.

◆ ~MuxingKvmGic()

gem5::MuxingKvmGic::~MuxingKvmGic ( )

Definition at line 183 of file gic.cc.

Member Function Documentation

◆ clearBankedDistRange()

void gem5::MuxingKvmGic::clearBankedDistRange ( BaseGicRegisters to,
Addr  daddr,
size_t  size 
)
private

◆ clearDistRange()

void gem5::MuxingKvmGic::clearDistRange ( BaseGicRegisters to,
Addr  daddr,
size_t  size 
)
private

Definition at line 332 of file gic.cc.

References gem5::ArmISA::a, and gem5::PowerISA::to.

Referenced by copyGicState().

◆ clearInt()

void gem5::MuxingKvmGic::clearInt ( uint32_t  num)
overridevirtual

Clear an interrupt from a device that is connected to the GIC.

Depending on the configuration, the GIC may de-assert it's CPU line.

Parameters
numnumber of interrupt to send

Implements gem5::BaseGic.

Definition at line 248 of file gic.cc.

References gem5::GicV2::clearInt(), gem5::KvmKernelGicV2::clearSPI(), DPRINTF, kernelGic, and usingKvm.

◆ clearPPInt()

void gem5::MuxingKvmGic::clearPPInt ( uint32_t  num,
uint32_t  cpu 
)
overridevirtual

Implements gem5::BaseGic.

Definition at line 267 of file gic.cc.

References gem5::KvmKernelGicV2::clearPPI(), gem5::GicV2::clearPPInt(), DPRINTF, kernelGic, and usingKvm.

◆ copyBankedDistRange()

void gem5::MuxingKvmGic::copyBankedDistRange ( BaseGicRegisters from,
BaseGicRegisters to,
Addr  daddr,
size_t  size 
)
private

◆ copyCpuRegister()

void gem5::MuxingKvmGic::copyCpuRegister ( BaseGicRegisters from,
BaseGicRegisters to,
ContextID  ctx,
Addr  daddr 
)
private

Definition at line 297 of file gic.cc.

References DPRINTF, gem5::BaseGicRegisters::readCpu(), gem5::PowerISA::to, and gem5::X86ISA::val.

Referenced by copyGicState().

◆ copyDistRange()

void gem5::MuxingKvmGic::copyDistRange ( BaseGicRegisters from,
BaseGicRegisters to,
Addr  daddr,
size_t  size 
)
private

Definition at line 324 of file gic.cc.

References gem5::ArmISA::a, copyDistRegister(), and gem5::PowerISA::to.

Referenced by copyGicState().

◆ copyDistRegister()

void gem5::MuxingKvmGic::copyDistRegister ( BaseGicRegisters from,
BaseGicRegisters to,
ContextID  ctx,
Addr  daddr 
)
private

◆ copyGicState()

void gem5::MuxingKvmGic::copyGicState ( BaseGicRegisters from,
BaseGicRegisters to 
)
private

◆ drain()

DrainState gem5::MuxingKvmGic::drain ( )
overridevirtual

Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight.

Draining is mostly used before forking and creating a check point.

This function notifies an object that it needs to drain its state.

If the object does not need further simulation to drain internal buffers, it returns DrainState::Drained and automatically switches to the Drained state. If the object needs more simulation, it returns DrainState::Draining and automatically enters the Draining state. Other return values are invalid.

Note
An object that has entered the Drained state can be disturbed by other objects in the system and consequently stop being drained. These perturbations are not visible in the drain state. The simulator therefore repeats the draining process until all objects return DrainState::Drained on the first call to drain().
Returns
DrainState::Drained if the object is drained at this point in time, DrainState::Draining if it needs further simulation.

Implements gem5::Drainable.

Definition at line 197 of file gic.cc.

References gem5::GicV2::drain(), fromKvmToGicV2(), and usingKvm.

◆ drainResume()

void gem5::MuxingKvmGic::drainResume ( )
overridevirtual

Resume execution after a successful drain.

Reimplemented from gem5::Drainable.

Definition at line 205 of file gic.cc.

References gem5::GicV2::drainResume(), fromGicV2ToKvm(), kernelGic, system, usingKvm, and gem5::System::validKvmEnvironment().

◆ fromGicV2ToKvm()

void gem5::MuxingKvmGic::fromGicV2ToKvm ( )
private

Multiplexing implementation.

Definition at line 413 of file gic.cc.

References copyGicState(), and kernelGic.

Referenced by drainResume(), and startup().

◆ fromKvmToGicV2()

void gem5::MuxingKvmGic::fromKvmToGicV2 ( )
private

◆ read()

Tick gem5::MuxingKvmGic::read ( PacketPtr  pkt)
overridevirtual

Pure virtual function that the device must implement.

Called when a read command is recieved by the port.

Parameters
pktPacket describing this request
Returns
number of ticks it took to complete

Implements gem5::PioDevice.

Definition at line 220 of file gic.cc.

References panic, gem5::GicV2::read(), and usingKvm.

◆ sendInt()

void gem5::MuxingKvmGic::sendInt ( uint32_t  num)
overridevirtual

Post an interrupt from a device that is connected to the GIC.

Depending on the configuration, the GIC will pass this interrupt on through to a CPU.

Parameters
numnumber of interrupt to send

Implements gem5::BaseGic.

Definition at line 238 of file gic.cc.

References DPRINTF, kernelGic, gem5::GicV2::sendInt(), gem5::KvmKernelGicV2::setSPI(), and usingKvm.

◆ sendPPInt()

void gem5::MuxingKvmGic::sendPPInt ( uint32_t  num,
uint32_t  cpu 
)
overridevirtual

Interface call for private peripheral interrupts.

Parameters
numnumber of interrupt to send
cpuCPU to forward interrupt to

Implements gem5::BaseGic.

Definition at line 258 of file gic.cc.

References DPRINTF, kernelGic, gem5::GicV2::sendPPInt(), gem5::KvmKernelGicV2::setPPI(), and usingKvm.

◆ startup()

void gem5::MuxingKvmGic::startup ( )
overridevirtual

startup() is the final initialization call before simulation.

All state is initialized (including unserialized state, if any, such as the curTick() value), so this is the appropriate place to schedule initial event(s) for objects that need them.

Reimplemented from gem5::SimObject.

Definition at line 188 of file gic.cc.

References fromGicV2ToKvm(), kernelGic, gem5::SimObject::startup(), system, usingKvm, and gem5::System::validKvmEnvironment().

◆ updateIntState()

void gem5::MuxingKvmGic::updateIntState ( int  hint)
overrideprotectedvirtual

See if some processor interrupt flags need to be enabled/disabled.

Parameters
hintwhich set of interrupts needs to be checked

Reimplemented from gem5::GicV2.

Definition at line 277 of file gic.cc.

References gem5::GicV2::updateIntState(), and usingKvm.

◆ write()

Tick gem5::MuxingKvmGic::write ( PacketPtr  pkt)
overridevirtual

Pure virtual function that the device must implement.

Called when a write command is recieved by the port.

Parameters
pktPacket describing this request
Returns
number of ticks it took to complete

Implements gem5::PioDevice.

Definition at line 229 of file gic.cc.

References panic, usingKvm, and gem5::GicV2::write().

Member Data Documentation

◆ kernelGic

KvmKernelGicV2* gem5::MuxingKvmGic::kernelGic
protected

Kernel GIC device.

Definition at line 200 of file gic.hh.

Referenced by clearInt(), clearPPInt(), drainResume(), fromGicV2ToKvm(), fromKvmToGicV2(), MuxingKvmGic(), sendInt(), sendPPInt(), and startup().

◆ system

System& gem5::MuxingKvmGic::system
protected

System this interrupt controller belongs to.

Definition at line 197 of file gic.hh.

Referenced by clearBankedDistRange(), copyBankedDistRange(), copyGicState(), drainResume(), fromKvmToGicV2(), MuxingKvmGic(), and startup().

◆ usingKvm

bool gem5::MuxingKvmGic::usingKvm
private

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

Generated on Tue Sep 21 2021 12:27:48 for gem5 by doxygen 1.8.17