EmulatedDriver is an abstract base class for fake SE-mode device drivers. More...

#include <emul_driver.hh>

Inheritance diagram for EmulatedDriver:

Public Member Functions
	EmulatedDriver (EmulatedDriverParams *p)

bool	match (const std::string &s) const
	Check for a match with this driver's filename. More...

virtual int	open (Process p, ThreadContext tc, int mode, int flags)=0
	Abstract method, invoked when the user program calls open() on the device driver. More...

virtual int	ioctl (Process p, ThreadContext tc, unsigned req)=0
	Abstract method, invoked when the user program calls ioctl() on the file descriptor returned by a previous open(). More...

virtual Addr	mmap (Process p, ThreadContext tc, Addr start, uint64_t length, int prot, int tgtFlags, int tgtFd, int offset)
	Virtual method, invoked when the user program calls mmap() on the file descriptor returned by a previous open(). More...

Public Member Functions inherited from SimObject
const Params *	params () const

	SimObject (const Params *_params)

virtual	~SimObject ()

virtual const std::string	name () const

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	regStats ()
	Register statistics for this object. More...

virtual void	resetStats ()
	Reset statistics associated with this object. More...

virtual void	regProbePoints ()
	Register probe points for this object. More...

virtual void	regProbeListeners ()
	Register probe listeners for this object. More...

ProbeManager *	getProbeManager ()
	Get the probe manager for this object. 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...

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 EventManager
	EventManager (EventManager &em)

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

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)

void	setCurTick (Tick newVal)

Public Member Functions inherited from 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 Drainable
DrainState	drainState () const
	Return the current drain state of an object. More...

virtual void	notifyFork ()
	Notify a child process of a fork. More...

Protected Attributes
const std::string &	filename
	filename for opening this driver (under /dev) More...

Protected Attributes inherited from SimObject
const SimObjectParams *	_params
	Cached copy of the object parameters. More...

Protected Attributes inherited from EventManager
EventQueue *	eventq
	A pointer to this object's event queue. More...

Additional Inherited Members
Public Types inherited from SimObject
typedef SimObjectParams	Params

Static Public Member Functions inherited from SimObject
static void	serializeAll (CheckpointOut &cp)
	Serialize all SimObjects in the system. More...

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it. More...

Static Public Member Functions inherited from Serializable
static const std::string &	currentSection ()
	Get the fully-qualified name of the active section. More...

static void	serializeAll (const std::string &cpt_dir)

static void	unserializeGlobals (CheckpointIn &cp)

Static Public Attributes inherited from Serializable
static int	ckptCount = 0

static int	ckptMaxCount = 0

static int	ckptPrevCount = -1

Protected Member Functions inherited from Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain. More...

void	signalDrainDone () const
	Signal that an object is drained. More...

Detailed Description

EmulatedDriver is an abstract base class for fake SE-mode device drivers.

Specific drivers that allow applications to communicate with simulated hardware inside gem5 can be created by deriving from this class and overriding the abstract virtual methods.

Currently only open(), ioctl(), and mmap() calls are supported, but other calls (e.g., read(), write()) could be added as needed.

Definition at line 52 of file emul_driver.hh.

Constructor & Destructor Documentation

EmulatedDriver::EmulatedDriver ( EmulatedDriverParams * p )

inline

Definition at line 61 of file emul_driver.hh.

Member Function Documentation

virtual int EmulatedDriver::ioctl	(	Process *	p,
		ThreadContext *	tc,
		unsigned	req
	)

pure virtual

Abstract method, invoked when the user program calls ioctl() on the file descriptor returned by a previous open().

The parameters are the same as those passed in to ioctlFunc() (q.v.).

Returns: The return code for the ioctl, or the negation of the errno (see the SyscallReturn class).

Implemented in ClDriver.

Referenced by ioctlFunc().

bool EmulatedDriver::match ( const std::string & s ) const

inline

Check for a match with this driver's filename.

Definition at line 69 of file emul_driver.hh.

References filename.

virtual Addr EmulatedDriver::mmap	(	Process *	p,
		ThreadContext *	tc,
		Addr	start,
		uint64_t	length,
		int	prot,
		int	tgtFlags,
		int	tgtFd,
		int	offset
	)

inlinevirtual

Virtual method, invoked when the user program calls mmap() on the file descriptor returned by a previous open().

The parameters are the same as those passed in to mmapFunc() (q.v.).

Returns: The return ptr for the mmap, or the negation of the errno (see the SyscallReturn class).

Definition at line 96 of file emul_driver.hh.

Referenced by mmapImpl().

virtual int EmulatedDriver::open	(	Process *	p,
		ThreadContext *	tc,
		int	mode,
		int	flags
	)

pure virtual

Abstract method, invoked when the user program calls open() on the device driver.

The parameters are the same as those passed to openFunc() (q.v.).

Returns: A newly allocated target fd, or -1 on error.

Implemented in ClDriver.

Referenced by openImpl().

Member Data Documentation

const std::string& EmulatedDriver::filename

protected

filename for opening this driver (under /dev)

Definition at line 58 of file emul_driver.hh.

Referenced by match(), and ClDriver::open().

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

sim/emul_driver.hh

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation