Declaration of base class for page table. More...

#include <page_table.hh>

Inheritance diagram for PageTableBase:

Classes
struct	cacheElement

Public Types
enum	MappingFlags : uint32_t { Zero = 0, Clobber = 1, NotPresent = 2, Uncacheable = 4, ReadOnly = 8 }

Public Member Functions
	PageTableBase (const std::string &__name, uint64_t _pid, Addr _pageSize=TheISA::PageBytes)

virtual	~PageTableBase ()

virtual void	initState (ThreadContext *tc)=0

const std::string	name () const

Addr	pageAlign (Addr a)

Addr	pageOffset (Addr a)

virtual void	map (Addr vaddr, Addr paddr, int64_t size, uint64_t flags=0)=0
	Maps a virtual memory region to a physical memory region. More...

virtual void	remap (Addr vaddr, int64_t size, Addr new_vaddr)=0

virtual void	unmap (Addr vaddr, int64_t size)=0

virtual bool	isUnmapped (Addr vaddr, int64_t size)=0
	Check if any pages in a region are already allocated. More...

virtual bool	lookup (Addr vaddr, TheISA::TlbEntry &entry)=0
	Lookup function. More...

bool	translate (Addr vaddr, Addr &paddr)
	Translate function. More...

bool	translate (Addr vaddr)
	Simplified translate function (just check for translation) More...

Fault	translate (RequestPtr req)
	Perform a translation on the memory request, fills in paddr field of req. More...

void	updateCache (Addr vaddr, TheISA::TlbEntry entry)
	Update the page table cache. More...

void	eraseCacheEntry (Addr vaddr)
	Erase an entry from the page table cache. More...

virtual void	getMappings (std::vector< std::pair< Addr, Addr >> *addr_mappings)

Public Member Functions inherited from Serializable
	Serializable ()

virtual	~Serializable ()

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

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

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)

Protected Attributes
struct cacheElement	pTableCache [3]

const Addr	pageSize

const Addr	offsetMask

const uint64_t	pid

const std::string	_name

Additional Inherited Members
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

Detailed Description

Declaration of base class for page table.

Definition at line 57 of file page_table.hh.

Member Enumeration Documentation

enum PageTableBase::MappingFlags : uint32_t

Enumerator
Zero
Clobber
NotPresent
Uncacheable
ReadOnly

Definition at line 96 of file page_table.hh.

Constructor & Destructor Documentation

PageTableBase::PageTableBase	(	const std::string &	__name,
		uint64_t	_pid,
		Addr	_pageSize = `TheISA::PageBytes`
	)

inline

Definition at line 76 of file page_table.hh.

References isPowerOf2(), pageSize, pTableCache, and PageTableBase::cacheElement::valid.

virtual PageTableBase::~PageTableBase ( )

inlinevirtual

Definition at line 87 of file page_table.hh.

Member Function Documentation

void PageTableBase::eraseCacheEntry ( Addr vaddr )

inline

Erase an entry from the page table cache.

Parameters

vaddr virtual address (page aligned) to check

Definition at line 186 of file page_table.hh.

References pTableCache, and PageTableBase::cacheElement::valid.

Referenced by FuncPageTable::map(), FuncPageTable::remap(), and FuncPageTable::unmap().

virtual void PageTableBase::getMappings ( std::vector< std::pair< Addr, Addr >> * addr_mappings )

inlinevirtual

Reimplemented in FuncPageTable.

Definition at line 198 of file page_table.hh.

Referenced by Process::clone().

virtual void PageTableBase::initState ( ThreadContext * tc )

pure virtual

Implemented in FuncPageTable, and MultiLevelPageTable< ISAOps >.

Referenced by Process::initState().

virtual bool PageTableBase::isUnmapped	(	Addr	vaddr,
		int64_t	size
	)

pure virtual

Check if any pages in a region are already allocated.

Parameters

vaddr	The starting virtual address of the region.
size	The length of the region.

Returns: True if no pages in the region are mapped.

Implemented in FuncPageTable, and MultiLevelPageTable< ISAOps >.

virtual bool PageTableBase::lookup	(	Addr	vaddr,
		TheISA::TlbEntry &	entry
	)

pure virtual

Lookup function.

Parameters

vaddr The virtual address.

Returns: entry The page table entry corresponding to vaddr.

Implemented in FuncPageTable, and MultiLevelPageTable< ISAOps >.

Referenced by SparcISA::RemoteGDB::acc(), MipsISA::RemoteGDB::acc(), PowerISA::RemoteGDB::acc(), RiscvISA::RemoteGDB::acc(), X86ISA::RemoteGDB::acc(), ArmISA::RemoteGDB::acc(), AlphaISA::NDtbMissFault::invoke(), SparcISA::FastInstructionAccessMMUMiss::invoke(), SparcISA::FastDataAccessMMUMiss::invoke(), AlphaISA::ItbPageFault::invoke(), X86ISA::GpuTLB::CpuSidePort::recvFunctional(), and translate().

virtual void PageTableBase::map	(	Addr	vaddr,
		Addr	paddr,
		int64_t	size,
		uint64_t	flags = `0`
	)

pure virtual

Maps a virtual memory region to a physical memory region.

Parameters

vaddr	The starting virtual address of the region.
paddr	The starting physical address where the region is mapped.
size	The length of the region.
flags	Generic mapping flags that can be set by or-ing values from MappingFlags enum.

Implemented in FuncPageTable, and MultiLevelPageTable< ISAOps >.

Referenced by Process::allocateMem(), Process::map(), and Process::replicatePage().

const std::string PageTableBase::name ( ) const

inline

Definition at line 107 of file page_table.hh.

References _name.

Addr PageTableBase::pageAlign ( Addr a )

inline

Definition at line 109 of file page_table.hh.

References offsetMask.

Referenced by SparcISA::FastInstructionAccessMMUMiss::invoke(), SparcISA::FastDataAccessMMUMiss::invoke(), FuncPageTable::lookup(), X86ISA::GpuTLB::CpuSidePort::recvFunctional(), and translate().

Addr PageTableBase::pageOffset ( Addr a )