#include <atomic.hh>

Inheritance diagram for AtomicSimpleCPU:

Classes
class	AtomicCPUDPort

class	AtomicCPUPort
	An AtomicCPUPort overrides the default behaviour of the recvAtomicSnoop and ignores the packet instead of panicking. More...

struct	TickEvent

Public Member Functions
	AtomicSimpleCPU (AtomicSimpleCPUParams *params)

virtual	~AtomicSimpleCPU ()

void	init () override

DrainState	drain () override

void	drainResume () override

void	switchOut () override

void	takeOverFrom (BaseCPU *oldCPU) override

void	verifyMemoryMode () const override

void	activateContext (ThreadID thread_num) override

void	suspendContext (ThreadID thread_num) override

Fault	readMem (Addr addr, uint8_t *data, unsigned size, Request::Flags flags) override

Fault	initiateMemRead (Addr addr, unsigned size, Request::Flags flags) override

Fault	writeMem (uint8_t data, unsigned size, Addr addr, Request::Flags flags, uint64_t res) override

void	regProbePoints () override

void	printAddr (Addr a)
	Print state of address in memory system via PrintReq (for debugging). More...

Public Member Functions inherited from BaseSimpleCPU
	BaseSimpleCPU (BaseSimpleCPUParams *params)

virtual	~BaseSimpleCPU ()

void	wakeup (ThreadID tid) override

void	init () override

Addr	dbg_vtophys (Addr addr)

void	checkForInterrupts ()

void	setupFetchRequest (Request *req)

void	preExecute ()

void	postExecute ()

void	advancePC (const Fault &fault)

void	haltContext (ThreadID thread_num) override

void	regStats () override

void	resetStats () override

void	startup () override

void	countInst ()

Counter	totalInsts () const override

Counter	totalOps () const override

void	serializeThread (CheckpointOut &cp, ThreadID tid) const override

void	unserializeThread (CheckpointIn &cp, ThreadID tid) override

Protected Member Functions
MasterPort &	getDataPort () override
	Return a reference to the data port. More...

MasterPort &	getInstPort () override
	Return a reference to the instruction port. More...

void	threadSnoop (PacketPtr pkt, ThreadID sender)
	Perform snoop for other cpu-local thread contexts. More...

Protected Member Functions inherited from BaseSimpleCPU
void	checkPcEventQueue ()

void	swapActiveThread ()

Private Member Functions
void	tick ()

bool	isDrained ()
	Check if a system is in a drained state. More...

bool	tryCompleteDrain ()
	Try to complete a drain request. More...

Private Attributes
TickEvent	tickEvent

const int	width

bool	locked

const bool	simulate_data_stalls

const bool	simulate_inst_stalls

AtomicCPUPort	icachePort

AtomicCPUDPort	dcachePort

bool	fastmem

Request	ifetch_req

Request	data_read_req

Request	data_write_req

bool	dcache_access

Tick	dcache_latency

ProbePointArg< std::pair < SimpleThread , const StaticInstPtr > >	ppCommit
	Probe Points. More...

Additional Inherited Members
Static Public Member Functions inherited from BaseCPU
static int	numSimulatedInsts ()

static int	numSimulatedOps ()

static void	wakeup (ThreadID tid)

Public Attributes inherited from BaseSimpleCPU
Trace::InstRecord *	traceData

CheckerCPU *	checker

std::vector< SimpleExecContext * >	threadInfo

std::list< ThreadID >	activeThreads

TheISA::MachInst	inst
	Current instruction. More...

StaticInstPtr	curStaticInst

StaticInstPtr	curMacroStaticInst

Protected Types inherited from BaseSimpleCPU
enum	Status { Idle, Running, Faulting, ITBWaitResponse, IcacheRetry, IcacheWaitResponse, IcacheWaitSwitch, DTBWaitResponse, DcacheRetry, DcacheWaitResponse, DcacheWaitSwitch }

Protected Attributes inherited from BaseSimpleCPU
ThreadID	curThread

BPredUnit *	branchPred

Status	_status

Detailed Description

Definition at line 52 of file atomic.hh.

Constructor & Destructor Documentation

AtomicSimpleCPU::AtomicSimpleCPU ( AtomicSimpleCPUParams * params )

Definition at line 96 of file atomic.cc.

References BaseSimpleCPU::_status, and BaseSimpleCPU::Idle.

AtomicSimpleCPU::~AtomicSimpleCPU ( )

virtual

Definition at line 109 of file atomic.cc.

References Event::scheduled(), and tickEvent.

Member Function Documentation

void AtomicSimpleCPU::activateContext ( ThreadID thread_num )

override

Definition at line 230 of file atomic.cc.

References BaseSimpleCPU::_status, BaseSimpleCPU::activeThreads, DPRINTF, BaseSimpleCPU::Running, Event::scheduled(), BaseSimpleCPU::threadInfo, and tickEvent.

DrainState AtomicSimpleCPU::drain ( )

override

Definition at line 117 of file atomic.cc.

References BaseSimpleCPU::activeThreads, DPRINTF, Drained, Draining, isDrained(), Event::scheduled(), and tickEvent.

void AtomicSimpleCPU::drainResume ( )

override

Definition at line 154 of file atomic.cc.

References BaseSimpleCPU::_status, ThreadContext::Active, BaseSimpleCPU::activeThreads, DPRINTF, BaseSimpleCPU::Idle, BaseSimpleCPU::Running, Event::scheduled(), BaseSimpleCPU::threadInfo, tickEvent, and verifyMemoryMode().

MasterPort& AtomicSimpleCPU::getDataPort ( )

inlineoverrideprotected

Return a reference to the data port.

Definition at line 184 of file atomic.hh.

References dcachePort.

MasterPort& AtomicSimpleCPU::getInstPort ( )

inlineoverrideprotected

Return a reference to the instruction port.

Definition at line 187 of file atomic.hh.

References icachePort.

void AtomicSimpleCPU::init ( )

override

Definition at line 86 of file atomic.cc.

References data_read_req, data_write_req, ifetch_req, BaseSimpleCPU::init(), and Request::setContext().

Fault AtomicSimpleCPU::initiateMemRead	(	Addr	addr,
		unsigned	size,
		Request::Flags	flags
	)

overridevirtual

Implements BaseSimpleCPU.

Definition at line 426 of file atomic.cc.

References panic.

bool AtomicSimpleCPU::isDrained ( )

inlineprivate

Check if a system is in a drained state.

We need to drain if:

We are in the middle of a microcode sequence as some CPUs (e.g., HW accelerated CPUs) can't be started in the middle of a gem5 microcode sequence.
The CPU is in a LLSC region. This shouldn't normally happen as these are executed atomically within a single tick() call. The only way this can happen at the moment is if there is an event in the PC event queue that affects the CPU state while it is in an LLSC region.
Stay at PC is true.

Definition at line 100 of file atomic.hh.

References BaseSimpleCPU::curThread, locked, SimpleThread::microPC(), SimpleExecContext::stayAtPC, SimpleExecContext::thread, and BaseSimpleCPU::threadInfo.

Referenced by drain(), switchOut(), and tryCompleteDrain().

void AtomicSimpleCPU::printAddr ( Addr a )

Print state of address in memory system via PrintReq (for debugging).

Definition at line 700 of file atomic.cc.

References dcachePort, and MasterPort::printAddr().