gem5::VirtQueue::VirtRing< T > Class Template Reference

VirtIO ring buffer wrapper. More...

Classes
struct	Header

Public Types
typedef uint16_t	Flags
typedef uint16_t	Index

Public Member Functions
	VirtRing (PortProxy &proxy, ByteOrder bo, uint16_t size)
void	reset ()
	Reset any state in the ring buffer.
void	setAddress (Addr addr)
	Set the base address of the VirtIO ring buffer.
void	readHeader ()
	Update the ring buffer header with data from the guest.
void	writeHeader ()
void	read ()
void	write ()

Public Attributes
Header	header
	Ring buffer header in host byte order.
std::vector< T >	ring
	Elements in ring in host byte order.

Private Member Functions
	VirtRing ()

Private Attributes
PortProxy &	_proxy
	Guest physical memory proxy.
Addr	_base
	Guest physical base address of the ring buffer.
ByteOrder	byteOrder
	Byte order in the ring.

Detailed Description

template<typename T>
class gem5::VirtQueue::VirtRing< T >

VirtIO ring buffer wrapper.

This class wraps a VirtIO ring buffer. The template parameter T is used to select the data type for the items in the ring (used or available descriptors).

Definition at line 468 of file base.hh.

Member Typedef Documentation

Flags

template<typename T>

typedef uint16_t gem5::VirtQueue::VirtRing< T >::Flags

Definition at line 471 of file base.hh.

Index

template<typename T>

typedef uint16_t gem5::VirtQueue::VirtRing< T >::Index

Definition at line 472 of file base.hh.

Constructor & Destructor Documentation

VirtRing() [1/2]

template<typename T>

gem5::VirtQueue::VirtRing< T >::VirtRing ( PortProxy & proxy, ByteOrder bo, uint16_t size )

inline

Definition at line 480 of file base.hh.

References _base, _proxy, gem5::PowerISA::bo, byteOrder, header, and ring.

VirtRing() [2/2]

template<typename T>

gem5::VirtQueue::VirtRing< T >::VirtRing ( )

private

Member Function Documentation

read()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::read ( )

inline

Definition at line 520 of file base.hh.

References _base, _proxy, byteOrder, gem5::gtoh(), header, gem5::ArmISA::i, readHeader(), and ring.

readHeader()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::readHeader ( )

inline

Update the ring buffer header with data from the guest.

Definition at line 501 of file base.hh.

References _base, _proxy, byteOrder, gem5::gtoh(), and header.

Referenced by read().

reset()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::reset ( )

inline

Reset any state in the ring buffer.

Definition at line 486 of file base.hh.

References _base, and header.

setAddress()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::setAddress ( Addr addr )

inline

Set the base address of the VirtIO ring buffer.

Parameters

addr	New host physical address

Definition at line 497 of file base.hh.

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

write()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::write ( )

inline

Definition at line 533 of file base.hh.

References _base, _proxy, byteOrder, header, gem5::htog(), gem5::ArmISA::i, ring, and writeHeader().

writeHeader()

template<typename T>

void gem5::VirtQueue::VirtRing< T >::writeHeader ( )

inline

Definition at line 510 of file base.hh.

References _base, _proxy, byteOrder, gem5::VirtQueue::VirtRing< T >::Header::flags, header, gem5::htog(), and gem5::VirtQueue::VirtRing< T >::Header::index.

Referenced by write().

Member Data Documentation

_base

template<typename T>

Addr gem5::VirtQueue::VirtRing< T >::_base

private

Guest physical base address of the ring buffer.

Definition at line 558 of file base.hh.

Referenced by read(), readHeader(), reset(), setAddress(), VirtRing(), write(), and writeHeader().

_proxy

template<typename T>

PortProxy& gem5::VirtQueue::VirtRing< T >::_proxy

private

Guest physical memory proxy.

Definition at line 556 of file base.hh.

Referenced by read(), readHeader(), VirtRing(), write(), and writeHeader().

byteOrder

template<typename T>

ByteOrder gem5::VirtQueue::VirtRing< T >::byteOrder

private

Byte order in the ring.

Definition at line 560 of file base.hh.

Referenced by read(), readHeader(), VirtRing(), write(), and writeHeader().

header

template<typename T>

Header gem5::VirtQueue::VirtRing< T >::header

Ring buffer header in host byte order.

Definition at line 547 of file base.hh.

Referenced by read(), readHeader(), reset(), VirtRing(), write(), and writeHeader().

ring

template<typename T>

std::vector<T> gem5::VirtQueue::VirtRing< T >::ring

Elements in ring in host byte order.

Definition at line 549 of file base.hh.

Referenced by read(), VirtRing(), and write().

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

• dev/virtio/base.hh