X64GdtManager Class Reference

#include <gdt.h>

Collaboration diagram for X64GdtManager:

Classes
struct	segment_descriptor
struct	tss_descriptor

Public Member Functions
void	initialise (size_t processorCount) INITIALISATION_ONLY

Static Public Member Functions
static X64GdtManager &	instance ()
static void	initialiseProcessor () INITIALISATION_ONLY

Private Member Functions
	X64GdtManager () INITIALISATION_ONLY
	X64GdtManager (const X64GdtManager &)
X64GdtManager &	operator= (const X64GdtManager &)
	~X64GdtManager ()
void	setSegmentDescriptor (size_t index, uint64_t base, uint32_t limit, uint8_t flags, uint8_t flags2)
void	setTssDescriptor (size_t index, uint64_t base) INITIALISATION_ONLY
void	initialiseTss (X64TaskStateSegment *pTss) INITIALISATION_ONLY
void	initialiseDoubleFaultTss (X64TaskStateSegment *pTss) INITIALISATION_ONLY

Static Private Member Functions
static void	loadSegmentRegisters ()

Private Attributes
struct X64GdtManager::segment_descriptor	PACKED
segment_descriptor *	m_Gdt
size_t	m_DescriptorCount

Static Private Attributes
static X64GdtManager	m_Instance

Detailed Description

The GDT manager on x64 processors

Definition at line 33 of file gdt.h.

Constructor & Destructor Documentation

X64GdtManager() [1/2]

X64GdtManager::X64GdtManager ( )

private

The constructor

Definition at line 102 of file gdt.cc.

X64GdtManager() [2/2]

X64GdtManager::X64GdtManager ( const X64GdtManager &  )

private

Copy constructor

Note

NOT implemented

~X64GdtManager()

X64GdtManager::~X64GdtManager ( )

private

The destructor

Definition at line 103 of file gdt.cc.

Member Function Documentation

initialise()

void X64GdtManager::initialise

(

size_t

processorCount

)

Initialise the GDT

Parameters

[in]

processorCount

the number of processors

Note

This should only be called from initialiseProcessor2()

Definition at line 41 of file gdt.cc.

References Dec, Vector< T >::end(), Hex, ProcessorBase::information(), initialiseTss(), m_DescriptorCount, m_Gdt, ProcessorBase::m_ProcessorInformation, setSegmentDescriptor(), and setTssDescriptor().

initialiseDoubleFaultTss()

void X64GdtManager::initialiseDoubleFaultTss ( X64TaskStateSegment *  pTss )

private

Definition at line 137 of file gdt.cc.

initialiseProcessor()

void X64GdtManager::initialiseProcessor ( )

static

Initialises this processors GDTR

Note

This should only be called from initialiseProcessor2()

Todo:

and some smp/acpi function

Definition at line 86 of file gdt.cc.

References ProcessorBase::information(), X64InterruptManager::initialiseProcessorIst(), loadSegmentRegisters(), m_DescriptorCount, m_Gdt, and m_Instance.

initialiseTss()

void X64GdtManager::initialiseTss ( X64TaskStateSegment *  pTss )

private

Readies a TSS for use.

Parameters

[in]

pTss

the TSS to ready.

Todo:

this should change

Definition at line 120 of file gdt.cc.

Referenced by initialise().

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instance()

static X64GdtManager & X64GdtManager::instance ( )

inlinestatic

Get the gdt manager instance

Returns

instance of the gdt manager

Definition at line 37 of file gdt.h.

References m_Instance.

loadSegmentRegisters()

static void X64GdtManager::loadSegmentRegisters ( )

staticprivate

Load the new segment registers

Note

This function is implemented in asm/gdt.s

Referenced by initialiseProcessor().

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operator=()

X64GdtManager & X64GdtManager::operator= ( const X64GdtManager &  )

private

Assignment operator

Note

NOT implemented

setSegmentDescriptor()

void X64GdtManager::setSegmentDescriptor ( size_t  index, uint64_t  base, uint32_t  limit, uint8_t  flags, uint8_t  flags2  )

private

Set up a segment descriptor

Parameters

[in]	index	the descriptor index
[in]	base	the base address
[in]	limit	the size of the segment (either in bytes or in 4kb units)
[in]	flags	the flags
[in]	flags2	additional flags

Definition at line 105 of file gdt.cc.

References X64GdtManager::segment_descriptor::base0, X64GdtManager::segment_descriptor::base1, X64GdtManager::segment_descriptor::base2, X64GdtManager::segment_descriptor::flags, X64GdtManager::segment_descriptor::flags_limit1, X64GdtManager::segment_descriptor::limit0, and m_Gdt.

Referenced by initialise(), and setTssDescriptor().

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setTssDescriptor()

void X64GdtManager::setTssDescriptor ( size_t  index, uint64_t  base  )

private

Set up a task-state-segment descriptor

Parameters

[in]	index	the descriptor index
[in]	base	the base address

Definition at line 114 of file gdt.cc.

References X64GdtManager::tss_descriptor::base3, m_Gdt, X64GdtManager::tss_descriptor::res, and setSegmentDescriptor().

Referenced by initialise().

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Member Data Documentation

m_DescriptorCount

size_t X64GdtManager::m_DescriptorCount

private

The number of descriptors in the Gdt

Definition at line 111 of file gdt.h.

Referenced by initialise(), and initialiseProcessor().

m_Gdt

segment_descriptor* X64GdtManager::m_Gdt

private

The Gdt

Definition at line 109 of file gdt.h.

Referenced by initialise(), initialiseProcessor(), setSegmentDescriptor(), and setTssDescriptor().

m_Instance

X64GdtManager X64GdtManager::m_Instance

staticprivate

The instance of the gdt manager

Definition at line 114 of file gdt.h.

Referenced by initialiseProcessor(), and instance().

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

• gdt.h
• gdt.cc