ARMSecondTable Class Reference

ARM second level page table implementation. More...

#include <ARMSecondTable.h>

Public Member Functions
MemoryContext::Result	map (Address virt, Address phys, Memory::Access)
	Map a virtual address to a physical address. More...
MemoryContext::Result	unmap (Address virt)
	Remove virtual address mapping. More...
MemoryContext::Result	translate (Address virt, Address *phys) const
	Translate virtual address to physical address. More...
MemoryContext::Result	access (Address virt, Memory::Access *access) const
	Get Access flags for a virtual address. More...

Private Member Functions
u32	flags (Memory::Access access) const
	Convert MemoryAccess to page table flags. More...

Private Attributes
u32	m_pages [256]
	Array of second level page table entries. More...

Detailed Description

ARM second level page table implementation.

Definition at line 39 of file ARMSecondTable.h.

Member Function Documentation

access()

MemoryContext::Result ARMSecondTable::access	(	Address	virt,
		Memory::Access *	access
	)		const

Get Access flags for a virtual address.

Parameters

virt	Virtual address to get Access flags for.
access	MemoryAccess object pointer.

Returns

Result code.

Definition at line 141 of file ARMSecondTable.cpp.

References Memory::Device, entry, Memory::InnerCached, MemoryContext::InvalidAddress, m_pages, Memory::OuterCached, PAGE2_AP_USER, PAGE2_APX, PAGE2_DEVICE_SHARED, PAGE2_PRESENT, PAGE2_UNCACHED, Memory::Readable, MemoryContext::Success, TABENTRY, Memory::Uncached, Memory::User, and Memory::Writable.

Referenced by ARMFirstTable::access(), flags(), and map().

flags()

u32 ARMSecondTable::flags ( Memory::Access  access ) const

private

Convert MemoryAccess to page table flags.

Parameters

access

Memory access flags

Returns

Page table access flags

Definition at line 168 of file ARMSecondTable.cpp.

References access(), Memory::Device, Memory::Executable, PAGE2_AP_SYS, PAGE2_AP_USER, PAGE2_APX, PAGE2_CACHE_WRITEBACK, PAGE2_DEVICE_SHARED, PAGE2_NOEXEC, PAGE2_UNCACHED, Memory::Uncached, Memory::User, and Memory::Writable.

Referenced by map().

map()

MemoryContext::Result ARMSecondTable::map	(	Address	virt,
		Address	phys,
		Memory::Access	access
	)

Map a virtual address to a physical address.

Parameters

virt	Virtual address.
phys	Physical address.
access	Memory access flags.

Returns

Result code

Definition at line 107 of file ARMSecondTable.cpp.

References access(), MemoryContext::AlreadyExists, Cache::cleanData(), flags(), m_pages, PAGE2_PRESENT, PAGEMASK, MemoryContext::Success, and TABENTRY.

Referenced by ARMFirstTable::map().

translate()

MemoryContext::Result ARMSecondTable::translate	(	Address	virt,
		Address *	phys
	)		const

Translate virtual address to physical address.

Parameters

virt	Virtual address to lookup as input
phys	Physical address for output.

Returns

Result code

Definition at line 132 of file ARMSecondTable.cpp.

References MemoryContext::InvalidAddress, m_pages, PAGE2_PRESENT, PAGEMASK, MemoryContext::Success, and TABENTRY.

Referenced by ARMFirstTable::releaseRange(), ARMFirstTable::releaseSection(), and ARMFirstTable::translate().

unmap()

MemoryContext::Result ARMSecondTable::unmap

(

Address

virt

)

Remove virtual address mapping.

Parameters

virt	Virtual address.

Returns

Result code

Definition at line 123 of file ARMSecondTable.cpp.

References Cache::cleanData(), m_pages, PAGE2_NONE, MemoryContext::Success, and TABENTRY.

Referenced by ARMFirstTable::releaseRange(), and ARMFirstTable::unmap().

Field Documentation

m_pages

u32 ARMSecondTable::m_pages[256]

private

Array of second level page table entries.

Definition at line 99 of file ARMSecondTable.h.

Referenced by access(), map(), translate(), and unmap().

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

• lib/libarch/arm/ARMSecondTable.h
• lib/libarch/arm/ARMSecondTable.cpp