Message Handling Unit. More...

#include <mhu.hh>

Inheritance diagram for gem5::MHU:

Public Types
enum	{ SCP_INTR_L_STAT = 0x0 , SCP_INTR_L_SET = 0x8 , SCP_INTR_L_CLEAR = 0x10 , SCP_INTR_H_STAT = 0x20 , SCP_INTR_H_SET = 0x28 , SCP_INTR_H_CLEAR = 0x30 , CPU_INTR_L_STAT = 0x100 , CPU_INTR_L_SET = 0x108 , CPU_INTR_L_CLEAR = 0x110 , CPU_INTR_H_STAT = 0x120 , CPU_INTR_H_SET = 0x128 , CPU_INTR_H_CLEAR = 0x130 , SCP_INTR_S_STAT = 0x200 , SCP_INTR_S_SET = 0x208 , SCP_INTR_S_CLEAR = 0x210 , CPU_INTR_S_STAT = 0x300 , CPU_INTR_S_SET = 0x308 , CPU_INTR_S_CLEAR = 0x310 , MHU_SCFG = 0x400 , PID4 = 0xfd0 , PID0 = 0xfe0 , PID1 = 0xfe4 , PID2 = 0xfe8 , PID3 = 0xfec , COMPID0 = 0xff0 , COMPID1 = 0xff4 , COMPID2 = 0xff8 , COMPID3 = 0xffc }

Public Types inherited from gem5::PioDevice
using	Params = PioDeviceParams

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

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Public Member Functions
	MHU (const MHUParams &p)

AddrRangeList	getAddrRanges () const override
	Determine the address ranges that this device responds to.

Tick	read (PacketPtr pkt) override
	Pure virtual function that the device must implement.

Tick	write (PacketPtr pkt) override
	Pure virtual function that the device must implement.

uint32_t	read32 (const Addr addr, bool secure_access)

Public Member Functions inherited from gem5::BasicPioDevice
	PARAMS (BasicPioDevice)

	BasicPioDevice (const Params &p, Addr size)

AddrRangeList	getAddrRanges () const override
	Determine the address ranges that this device responds to.

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.

Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID) 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 Port &	getPort (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
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 ()

virtual void	serialize (CheckpointOut &cp) const =0
	Serialize an object.

virtual void	unserialize (CheckpointIn &cp)=0
	Unserialize an object.

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 (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

Public Attributes
Scp2ApDoorbell *	scpLow

Scp2ApDoorbell *	scpHigh

Scp2ApDoorbell *	scpSec

Ap2ScpDoorbell *	apLow

Ap2ScpDoorbell *	apHigh

Ap2ScpDoorbell *	apSec

uint32_t	pid [5]

uint32_t	compid [4]

uint32_t	scfg

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Static Public Attributes
static const uint32_t	SVI_INT = 0x80000000

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 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.

virtual AddrRangeList	getAddrRanges () const =0
	Every PIO device is obliged to provide an implementation that returns the address ranges the device responds to.

virtual Tick	read (PacketPtr pkt)=0
	Pure virtual function that the device must implement.

virtual Tick	write (PacketPtr pkt)=0
	Pure virtual function that the device must implement.

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

virtual	~Drainable ()

virtual DrainState	drain ()=0
	Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight.

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::BasicPioDevice
Addr	pioAddr
	Address that the device listens to.

Addr	pioSize
	Size that the device's address range.

Tick	pioDelay
	Delay that the device experinces on an access.

Protected Attributes inherited from gem5::PioDevice
System *	sys

PioPort< PioDevice >	pioPort
	The pioPort that handles the requests for us and provides us requests that it sees.

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

Message Handling Unit.

Definition at line 102 of file mhu.hh.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
SCP_INTR_L_STAT	From SCP to Application Processor.
SCP_INTR_L_SET
SCP_INTR_L_CLEAR
SCP_INTR_H_STAT
SCP_INTR_H_SET
SCP_INTR_H_CLEAR
CPU_INTR_L_STAT	From Application Processor to SCP.
CPU_INTR_L_SET
CPU_INTR_L_CLEAR
CPU_INTR_H_STAT
CPU_INTR_H_SET
CPU_INTR_H_CLEAR
SCP_INTR_S_STAT
SCP_INTR_S_SET
SCP_INTR_S_CLEAR
CPU_INTR_S_STAT
CPU_INTR_S_SET
CPU_INTR_S_CLEAR
MHU_SCFG
PID4
PID0
PID1
PID2
PID3
COMPID0
COMPID1
COMPID2
COMPID3

Definition at line 105 of file mhu.hh.

Constructor & Destructor Documentation

◆ MHU()

gem5::MHU::MHU ( const MHUParams & p )

Definition at line 59 of file mhu.cc.

References apHigh, apLow, apSec, gem5::MipsISA::p, and gem5::Ap2ScpDoorbell::setScp().

Member Function Documentation

◆ getAddrRanges()

AddrRangeList gem5::MHU::getAddrRanges ( ) const

overridevirtual

Determine the address ranges that this device responds to.

Returns: a list of non-overlapping address ranges

Reimplemented from gem5::BasicPioDevice.

Definition at line 77 of file mhu.cc.

References gem5::BasicPioDevice::pioAddr, gem5::BasicPioDevice::pioSize, and gem5::RangeSize().

◆ read()

Tick gem5::MHU::read ( PacketPtr pkt )

overridevirtual

Pure virtual function that the device must implement.

Called when a read command is recieved by the port.

Parameters

pkt	Packet describing this request

Returns: number of ticks it took to complete

Implements gem5::PioDevice.

Definition at line 83 of file mhu.cc.

References gem5::X86ISA::addr, DPRINTF, gem5::Packet::getAddr(), gem5::Packet::isSecure(), gem5::Packet::makeAtomicResponse(), gem5::BasicPioDevice::pioAddr, gem5::BasicPioDevice::pioDelay, read32(), and gem5::Packet::setUintX().

◆ read32()

uint32_t gem5::MHU::read32	(	const Addr	addr,
		bool	secure_access
	)

Definition at line 98 of file mhu.cc.

References gem5::X86ISA::addr, apHigh, apLow, apSec, gem5::bits(), gem5::MhuDoorbell::channel, compid, COMPID0, COMPID1, COMPID2, COMPID3, CPU_INTR_H_STAT, CPU_INTR_L_STAT, CPU_INTR_S_STAT, MHU_SCFG, panic, pid, PID0, PID1, PID2, PID3, PID4, scfg, SCP_INTR_H_STAT, SCP_INTR_L_STAT, SCP_INTR_S_STAT, scpHigh, scpLow, scpSec, gem5::MhuDoorbell::set(), and SVI_INT.

Referenced by read().

◆ write()

Tick gem5::MHU::write ( PacketPtr pkt )

overridevirtual

Pure virtual function that the device must implement.

Called when a write command is recieved by the port.

Parameters

pkt	Packet describing this request

Returns: number of ticks it took to complete

Implements gem5::PioDevice.

Definition at line 151 of file mhu.cc.

References gem5::X86ISA::addr, apHigh, apLow, apSec, gem5::MhuDoorbell::clear(), CPU_INTR_H_CLEAR, CPU_INTR_H_SET, CPU_INTR_L_CLEAR, CPU_INTR_L_SET, CPU_INTR_S_CLEAR, CPU_INTR_S_SET, DPRINTF, gem5::Packet::getAddr(), gem5::Packet::getLE(), gem5::Packet::getSize(), gem5::Packet::makeAtomicResponse(), MHU_SCFG, panic, gem5::BasicPioDevice::pioAddr, gem5::BasicPioDevice::pioDelay, scfg, SCP_INTR_H_CLEAR, SCP_INTR_H_SET, SCP_INTR_L_CLEAR, SCP_INTR_L_SET, SCP_INTR_S_CLEAR, SCP_INTR_S_SET, scpHigh, scpLow, scpSec, and gem5::MhuDoorbell::set().

Member Data Documentation

◆ apHigh

Ap2ScpDoorbell* gem5::MHU::apHigh

Definition at line 162 of file mhu.hh.

Referenced by MHU(), read32(), and write().

◆ apLow

Ap2ScpDoorbell* gem5::MHU::apLow

Definition at line 161 of file mhu.hh.

Referenced by MHU(), read32(), and write().

◆ apSec

Ap2ScpDoorbell* gem5::MHU::apSec

Definition at line 163 of file mhu.hh.

Referenced by MHU(), read32(), and write().

◆ compid

uint32_t gem5::MHU::compid[4]

Definition at line 167 of file mhu.hh.

Referenced by read32().

◆ pid

uint32_t gem5::MHU::pid[5]

Definition at line 166 of file mhu.hh.

Referenced by read32().

◆ scfg

uint32_t gem5::MHU::scfg

Definition at line 169 of file mhu.hh.

Referenced by read32(), and write().

◆ scpHigh

Scp2ApDoorbell* gem5::MHU::scpHigh

Definition at line 158 of file mhu.hh.

Referenced by read32(), and write().

◆ scpLow

Scp2ApDoorbell* gem5::MHU::scpLow

Definition at line 157 of file mhu.hh.

Referenced by read32(), and write().

◆ scpSec

Scp2ApDoorbell* gem5::MHU::scpSec

Definition at line 159 of file mhu.hh.

Referenced by read32(), and write().

◆ SVI_INT

const uint32_t gem5::MHU::SVI_INT = 0x80000000

static

Definition at line 146 of file mhu.hh.

Referenced by read32().

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

dev/arm/css/mhu.hh
dev/arm/css/mhu.cc

Public Types

Public Member Functions

Public Attributes

Static Public Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ MHU()

Member Function Documentation

◆ getAddrRanges()

◆ read()

◆ read32()

◆ write()

Member Data Documentation

◆ apHigh

◆ apLow

◆ apSec

◆ compid

◆ pid

◆ scfg

◆ scpHigh

◆ scpLow

◆ scpSec

◆ SVI_INT