#include <VirtualAddressSpace.h>

Inheritance diagram for ArmV7VirtualAddressSpace:

Collaboration diagram for ArmV7VirtualAddressSpace:

Classes
struct	FirstLevelDescriptor

struct	SecondLevelDescriptor

Public Member Functions
virtual bool	isAddressValid (void *virtualAddress)

virtual bool	isMapped (void *virtualAddress)

virtual bool	map (physical_uintptr_t physicalAddress, void *virtualAddress, size_t flags)

virtual void	getMapping (void *virtualAddress, physical_uintptr_t &physicalAddress, size_t &flags)

virtual void	setFlags (void *virtualAddress, size_t newFlags)

virtual void	unmap (void *virtualAddress)

virtual void *	allocateStack ()

virtual void *	allocateStack (size_t stackSz)

virtual void	freeStack (void *pStack)

virtual bool	memIsInHeap (void *pMem)

virtual void *	getEndOfHeap ()

bool	mapPageStructures (physical_uintptr_t physicalAddress, void *virtualAddress, size_t flags)

virtual VirtualAddressSpace *	clone ()

virtual void	revertToKernelAddressSpace ()

virtual uintptr_t	getKernelStart () const

virtual uintptr_t	getUserStart () const

virtual uintptr_t	getUserReservedStart () const

virtual uintptr_t	getDynamicLinkerAddress () const

virtual uintptr_t	getKernelHeapStart () const

virtual uintptr_t	getKernelHeapEnd () const

virtual uintptr_t	getKernelCacheStart () const

virtual uintptr_t	getKernelCacheEnd () const

virtual uintptr_t	getKernelEventBlockStart () const

virtual uintptr_t	getKernelModulesStart () const

virtual uintptr_t	getKernelModulesEnd () const

Public Member Functions inherited from VirtualAddressSpace
virtual void *	expandHeap (ssize_t incr, size_t flags)

virtual bool	mapHuge (physical_uintptr_t physAddress, void *virtualAddress, size_t count, size_t flags)

virtual void	freeStack (Stack *pStack)=0

virtual VirtualAddressSpace *	clone (bool copyOnWrite=true)=0

virtual	~VirtualAddressSpace ()

void	setHeap (void heap, void heapEnd)

virtual bool	memIsInKernelHeap (void *pMem)=0

virtual uintptr_t	getDynamicStart () const

virtual uintptr_t	getDynamicEnd () const

virtual uintptr_t	getGlobalInfoBlock () const

Protected Member Functions
virtual	~ArmV7VirtualAddressSpace ()

	ArmV7VirtualAddressSpace (void Heap, physical_uintptr_t PhysicalPageDirectory, void VirtualPageDirectory, void VirtualPageTables, void VirtualStack)

bool	doIsMapped (void *virtualAddress)

bool	doMap (physical_uintptr_t physicalAddress, void *virtualAddress, size_t flags)

void	doGetMapping (void *virtualAddress, physical_uintptr_t &physicalAddress, size_t &flags)

void	doSetFlags (void *virtualAddress, size_t newFlags)

void	doUnmap (void *virtualAddress)

void *	doAllocateStack (size_t sSize)

Protected Member Functions inherited from VirtualAddressSpace
	VirtualAddressSpace (void *Heap)

Private Member Functions
	ArmV7VirtualAddressSpace (void Heap, physical_uintptr_t PhysicalPageDirectory, void VirtualPageDirectory, void *VirtualPageTables)

	ArmV7VirtualAddressSpace ()

	ArmV7VirtualAddressSpace (const ArmV7VirtualAddressSpace &)

ArmV7VirtualAddressSpace &	operator= (const ArmV7VirtualAddressSpace &)

bool	initialise ()

bool	getPageTableEntry (void virtualAddress, uint32_t &pageTableEntry)

uint32_t	toFlags (size_t flags)

size_t	fromFlags (uint32_t Flags)

Private Attributes
struct ArmV7VirtualAddressSpace::FirstLevelDescriptor	PACKED

struct ArmV7VirtualAddressSpace::SecondLevelDescriptor	PACKED

physical_uintptr_t	m_PhysicalPageDirectory

void *	m_VirtualPageDirectory

void *	m_VirtualPageTables

void *	m_pStackTop

Vector< void * >	m_freeStacks

Spinlock	m_Lock

Friends
class	Processor

class	ArmV7KernelVirtualAddressSpace

VirtualAddressSpace *	VirtualAddressSpace::create ()

Additional Inherited Members
Static Public Member Functions inherited from VirtualAddressSpace
static EXPORTED_PUBLIC VirtualAddressSpace &	getKernelAddressSpace ()

static VirtualAddressSpace *	create ()

Public Attributes inherited from VirtualAddressSpace
void *	m_Heap

void *	m_HeapEnd

Static Public Attributes inherited from VirtualAddressSpace
static const size_t	KernelMode = 0x01

static const size_t	Write = 0x02

static const size_t	Execute = 0x04

static const size_t	WriteThrough = 0x08

static const size_t	CacheDisable = 0x10

static const size_t	CopyOnWrite = 0x20

static const size_t	Swapped = 0x40

static const size_t	MemoryCoherent = 0x80

static const size_t	Guarded = 0x100

static const size_t	Shared = 0x200

static const size_t	WriteCombine = 0x400

static const size_t	Accessed = 0x800

static const size_t	Dirty = 0x1000

static const size_t	ClearDirty = 0x2000

static physical_uintptr_t	m_ZeroPage = 0

Detailed Description

The ArmV7VirtualAddressSpace implements the VirtualAddressSpace class for the ARMv7 architecture.

Definition at line 68 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

Constructor & Destructor Documentation

ArmV7VirtualAddressSpace::~ArmV7VirtualAddressSpace ( )

protectedvirtual

The destructor does nothing

Definition at line 54 of file armv7/VirtualAddressSpace.cc.

Referenced by getKernelModulesEnd().

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ArmV7VirtualAddressSpace::ArmV7VirtualAddressSpace	(	void *	Heap,
		physical_uintptr_t	PhysicalPageDirectory,
		void *	VirtualPageDirectory,
		void *	VirtualPageTables,
		void *	VirtualStack
	)

protected

The constructor for already present paging structures

Parameters

[in]	Heap	virtual address of the beginning of the heap
[in]	PhysicalPageDirectory	physical address of the page directory
[in]	VirtualPageDirectory	virtual address of the page directory
[in]	VirtualPageTables	virtual address of the page tables
[in]	VirtualStack	virtual address of the next stacks

Note: This constructor is only used to construct the kernel VirtualAddressSpace

Definition at line 642 of file armv7/VirtualAddressSpace.cc.

ArmV7VirtualAddressSpace::ArmV7VirtualAddressSpace	(	void *	Heap,
		physical_uintptr_t	PhysicalPageDirectory,
		void *	VirtualPageDirectory,
		void *	VirtualPageTables
	)

private

The constructor for already present paging structures

Parameters

[in]	Heap	virtual address of the beginning of the heap
[in]	PhysicalPageDirectory	physical address of the page directory
[in]	VirtualPageDirectory	virtual address of the page directory
[in]	VirtualPageTables	virtual address of the page tables

ArmV7VirtualAddressSpace::ArmV7VirtualAddressSpace ( )

private

The default constructor

Note: NOT implemented

Definition at line 49 of file armv7/VirtualAddressSpace.cc.

Referenced by getKernelModulesEnd().

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ArmV7VirtualAddressSpace::ArmV7VirtualAddressSpace ( const ArmV7VirtualAddressSpace & )

private

The copy-constructor

Note: NOT implemented

Member Function Documentation

void * ArmV7VirtualAddressSpace::allocateStack ( )

virtual

Allocates a single stack for a thread. Will use the default kernel thread size.

Implements VirtualAddressSpace.

Definition at line 432 of file armv7/VirtualAddressSpace.cc.

References VirtualAddressSpace::getKernelAddressSpace().

Referenced by allocateStack().

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void * ArmV7VirtualAddressSpace::allocateStack ( size_t stackSz )

virtual

Allocates a single stack of the given size for a thread.

Reimplemented from VirtualAddressSpace.

Definition at line 440 of file armv7/VirtualAddressSpace.cc.

References Spinlock::acquire(), PhysicalMemoryManager::allocatePage(), allocateStack(), Vector< T >::count(), VirtualAddressSpace::getKernelAddressSpace(), PhysicalMemoryManager::getPageSize(), PhysicalMemoryManager::instance(), VirtualAddressSpace::KernelMode, m_freeStacks, m_Lock, m_pStackTop, map(), Vector< T >::popBack(), Vector< T >::pushBack(), Spinlock::release(), WARNING, and VirtualAddressSpace::Write.

virtual VirtualAddressSpace* ArmV7VirtualAddressSpace::clone ( )

inlinevirtual

Clone this VirtualAddressSpace. That means that we copy-on-write-map the application image.

Definition at line 115 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

bool ArmV7VirtualAddressSpace::doMap	(	physical_uintptr_t	physicalAddress,
		void *	virtualAddress,
		size_t	flags
	)

protected

Note: For later: when creating high-memory page table mappings, they should be in DOMAIN ONE - which holds all paging structures. This way they can be locked down appropriately.

Definition at line 173 of file armv7/VirtualAddressSpace.cc.

References PhysicalMemoryManager::allocatePage(), ArmV7VirtualAddressSpace::FirstLevelDescriptor::descriptor, ArmV7VirtualAddressSpace::SecondLevelDescriptor::descriptor, ERROR, FATAL, fromFlags(), Processor::id(), PhysicalMemoryManager::instance(), m_Lock, m_VirtualPageDirectory, m_VirtualPageTables, physicalAddress(), toFlags(), USERSPACE_PAGETABLES, and WARNING.

Referenced by getKernelModulesEnd(), map(), and ArmV7KernelVirtualAddressSpace::map().

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size_t ArmV7VirtualAddressSpace::fromFlags ( uint32_t Flags )

private

Convert processor's representation of the flags to the processor independant representation

Parameters

[in] Flags the processor specific flag representation

Returns: the proessor independant flag representation

Definition at line 91 of file armv7/VirtualAddressSpace.cc.

References VirtualAddressSpace::KernelMode, and VirtualAddressSpace::Write.

Referenced by doMap(), and getKernelModulesEnd().

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virtual uintptr_t ArmV7VirtualAddressSpace::getDynamicLinkerAddress ( ) const

inlinevirtual

Gets address of the dynamic linker in the address space.

Implements VirtualAddressSpace.

Definition at line 144 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

References USERSPACE_DYNAMIC_LINKER_LOCATION.

void * ArmV7VirtualAddressSpace::getEndOfHeap ( )

virtual

Gets a pointer to the byte after the end of the heap.

Implements VirtualAddressSpace.

Definition at line 67 of file armv7/VirtualAddressSpace.cc.

Referenced by memIsInHeap().

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virtual uintptr_t ArmV7VirtualAddressSpace::getKernelCacheEnd ( ) const

inlinevirtual

Gets address of the end of the kernel's cache region.

Implements VirtualAddressSpace.

Definition at line 169 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelCacheStart ( ) const

inlinevirtual

Gets address of the start of the kernel's cache region.

Implements VirtualAddressSpace.

Definition at line 163 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelEventBlockStart ( ) const

inlinevirtual

Gets address of the start of the kernel's event handling block.

Implements VirtualAddressSpace.

Definition at line 176 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelHeapEnd ( ) const

inlinevirtual

Gets address of the end of the kernel's heap region.

Implements VirtualAddressSpace.

Definition at line 156 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelHeapStart ( ) const

inlinevirtual

Gets address of the start of the kernel's heap region.

Implements VirtualAddressSpace.

Definition at line 150 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelModulesEnd ( ) const

inlinevirtual

Gets address of the end of the kernel's module region.

Implements VirtualAddressSpace.

Definition at line 188 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

References ArmV7VirtualAddressSpace(), doMap(), fromFlags(), getPageTableEntry(), initialise(), operator=(), physicalAddress(), toFlags(), and ~ArmV7VirtualAddressSpace().

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelModulesStart ( ) const

inlinevirtual

Gets address of the start of the kernel's module region.

Implements VirtualAddressSpace.

Definition at line 182 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getKernelStart ( ) const

inlinevirtual

Gets start address of the kernel in the address space.

Implements VirtualAddressSpace.

Definition at line 126 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

void ArmV7VirtualAddressSpace::getMapping	(	void *	virtualAddress,
		physical_uintptr_t &	physicalAddress,
		size_t &	flags
	)

virtual

Get the physical address and the flags associated with the specific virtual address.

Note: This function is only valid on memory that was mapped with VirtualAddressSpace::map() and that is still mapped or marked as swapped out.

Parameters

[in]	virtualAddress	the address in the virtual address space
[out]	flags	the flags
[out]	physicalAddress	the physical address

Implements VirtualAddressSpace.

Reimplemented in ArmV7KernelVirtualAddressSpace.

Definition at line 135 of file armv7/VirtualAddressSpace.cc.

bool ArmV7VirtualAddressSpace::getPageTableEntry	(	void *	virtualAddress,
		uint32_t *&	pageTableEntry
	)

private

Get the page table entry, if it exists and check whether a page is mapped or marked as swapped out.

Parameters

[in]	virtualAddress	the virtual address
[out]	pageTableEntry	pointer to the page table entry

Returns: true, if the page table is present and the page mapped or marked swapped out, false otherwise

Referenced by getKernelModulesEnd().

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virtual uintptr_t ArmV7VirtualAddressSpace::getUserReservedStart ( ) const

inlinevirtual

Gets start address of reserved areas of the userpace address space.

Implements VirtualAddressSpace.

Definition at line 138 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

virtual uintptr_t ArmV7VirtualAddressSpace::getUserStart ( ) const

inlinevirtual

Gets start address of the region usable and cloneable for userspace.

Implements VirtualAddressSpace.

Definition at line 132 of file kernel/core/processor/armv7/VirtualAddressSpace.h.

bool ArmV7VirtualAddressSpace::initialise ( )

private

Initialises the kernel address space, called by Processor.

Definition at line 108 of file armv7/VirtualAddressSpace.cc.

Referenced by getKernelModulesEnd().

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bool ArmV7VirtualAddressSpace::isAddressValid ( void * virtualAddress )

virtual

Is a particular virtual address valid?

Parameters

[in] virtualAddress the virtual address to check

Returns: true, if the address is valid, false otherwise

Implements VirtualAddressSpace.

Definition at line 113 of file armv7/VirtualAddressSpace.cc.

bool ArmV7VirtualAddressSpace::isMapped ( void * virtualAddress )

virtual

Checks whether a mapping the the specific virtual address exists. Pages marked as swapped out are not considered mapped.

Note: This function must be valid on all the valid addresses within the virtual address space.

Parameters

[in] virtualAddress the virtual address

Returns: true, if a mapping exists, false otherwise

Implements VirtualAddressSpace.

Reimplemented in ArmV7KernelVirtualAddressSpace.

Definition at line 130 of file armv7/VirtualAddressSpace.cc.

bool ArmV7VirtualAddressSpace::map	(	physical_uintptr_t	physicalAddress,
		void *	virtualAddress,
		size_t	flags
	)

virtual

Map a specific physical page (of size PhysicalMemoryManager::getPageSize()) at a specific location into the virtual address space.

Note: This function must also work on pages marked as swapped out.

Parameters

[in]	physicalAddress	the address of the physical page that should be mapped into the virtual address space.
[in]	virtualAddress	the virtual address at which the page apears within the virtual address space.
[in]	flags	flags that describe which accesses should be allowed on the page.

Returns: true, if successfull, false otherwise

Implements VirtualAddressSpace.

Reimplemented in ArmV7KernelVirtualAddressSpace.

Definition at line 119 of file armv7/VirtualAddressSpace.cc.

References doMap().

Referenced by allocateStack(), and ArmV7PhysicalMemoryManager::PageStack::free().

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bool ArmV7VirtualAddressSpace::mapPageStructures	(	physical_uintptr_t	physicalAddress,
		void *	virtualAddress,
		size_t	flags
	)

Map the page table or the page frame if none is currently present

Note: This should only be used from the PhysicalMemoryManager

Parameters

[in]	physicalAddress	the physical page that should be used as page table or page frame
[in]	virtualAddress	the virtual address that should be checked for the existance of a page table and page frame
[in]	flags	the flags used for the mapping

Returns: true, if a page table/frame is already mapped for that address, false if the physicalAddress has been used as a page table or as a page frame.

bool ArmV7VirtualAddressSpace::memIsInHeap ( void * pMem )

virtual

Determines if a given point is within the virtual address space region dedicated to the kernel heap.

Implements VirtualAddressSpace.

Definition at line 58 of file armv7/VirtualAddressSpace.cc.

References getEndOfHeap().

ArmV7VirtualAddressSpace& ArmV7VirtualAddressSpace::operator= ( const ArmV7VirtualAddressSpace & )

private

The copy-constructor