Zygoma::ia32::IDT Class Reference
[Intel IA32 (32-bit) Architecture]

#include <idt.h>

List of all members.

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Detailed Description

An interrupt descriptor table implements a vectored interrupt dispatch mechanism.

The interrupt table is arranged into the following sections.

0x00 - 0x1f

Intel reserved traps and exceptions.

0x20 - 0x5f

Hardware interrupt (IRQ) remapping vectors.

0x60 - 0x6f

Local APIC vectors.

0x60	LINT0	local interrupt 0
0x61	LINT1	local interrupt 1
0x62	ERROR	APIC error notification
0x63	PCINT	performance monitoring counter
0x64	TIMER	APIC timer
0x65	RFU65	reserved for future use
0x66	RFU66	reserved for future use
0x67	RFU67	reserved for future use
0x6f	SPIV	spurious interrupt

0x70 - 0x7f

Zygoma software traps. Only the first 8 are currently initialized.

0x70	SYSCALL0	userland entry point
0x71	SYSCALL1	reserved for future use
0x72	SYSCALL2	reserved for future use
0x73	SYSCALL3	reserved for future use
0x74	SYSCALL4	reserved for future use
0x75	SYSCALL5	reserved for future use
0x76	SYSCALL6	reserved for future use
0x77	SYSCALL7	reserved for future use

Public Types
typedef InterruptGate	value_type
typedef InterruptGate &	reference
typedef const InterruptGate &	const_reference
typedef InternalIdt::iterator	iterator
typedef InternalIdt::const_iterator	const_iterator
typedef std::ptrdiff_t	difference_type
typedef std::size_t	size_type
Public Member Functions
	IDT (int size)
	Allocates an IDT with size entires (all default initialized) and sets the current processor's interrupt descriptor table register (IDTR) with the base address and limit of the new table.
void	insert (unsigned int irq, const InterruptGate &)
	Inserts a new interrupt/trap entry in the IDT at slot irq.
void	dispatchInterrupt (int interruptNumber)
	Invokes all the chained interrupt trampolines until one has volunteered to handle the interrupt or the end of teh chain is reached.
void	disableInterrupts ()
	Disables interrupts for the CPU.
void	enableInterrupts ()
	Enables interrupts for the CPU.
std::ostream &	printStream (std::ostream &ostr) const
	Dumps the IDT to an output stream.
Capacity
*size_type	size () const
	Gets the capacity of the Idt.
bool	empty () const
	Indicates that the Idt contains no memory.
Iteration
*iterator	begin ()
const_iterator	begin () const
iterator	end ()
const_iterator	end () const

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Member Typedef Documentation

typedef InternalIdt::const_iterator Zygoma::ia32::IDT::const_iterator

typedef const InterruptGate& Zygoma::ia32::IDT::const_reference

typedef std::ptrdiff_t Zygoma::ia32::IDT::difference_type

typedef InternalIdt::iterator Zygoma::ia32::IDT::iterator

typedef InterruptGate& Zygoma::ia32::IDT::reference

typedef std::size_t Zygoma::ia32::IDT::size_type

typedef InterruptGate Zygoma::ia32::IDT::value_type

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Constructor & Destructor Documentation

IDT::IDT (  int  size  )

Allocates an IDT with size entires (all default initialized) and sets the current processor's interrupt descriptor table register (IDTR) with the base address and limit of the new table. Todo: move this into its own header file and class Here is the call graph for this function:

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Member Function Documentation

const_iterator Zygoma::ia32::IDT::begin (   )  const [inline]

* iterator Zygoma::ia32::IDT::begin (   )  [inline]

void IDT::disableInterrupts (   )

Disables interrupts for the CPU.

void IDT::dispatchInterrupt (  int  interruptNumber  )

Invokes all the chained interrupt trampolines until one has volunteered to handle the interrupt or the end of teh chain is reached. Parameters: interruptNumber  [IN]

bool Zygoma::ia32::IDT::empty (   )  const [inline]

Indicates that the Idt contains no memory. Returns: true if the capacity of the Idt is zero, false otherwise.

void IDT::enableInterrupts (   )

Enables interrupts for the CPU.

const_iterator Zygoma::ia32::IDT::end (   )  const [inline]

iterator Zygoma::ia32::IDT::end (   )  [inline]

void IDT::insert (  unsigned int  irq, const InterruptGate &  gate )

Inserts a new interrupt/trap entry in the IDT at slot irq. If irq is out of range, this function does nothing.

std::ostream & IDT::printStream (  std::ostream &  ostr  )  const

Dumps the IDT to an output stream. This function is aimed at debugging. Parameters: ostr  [INOUT] The stream to which the contents of the Interrupt Descriptor Table are to be dumped. Returns: a reference to te output stream containing the dumped interrupt descriptor table.

* size_type Zygoma::ia32::IDT::size (   )  const [inline]

Gets the capacity of the Idt. Returns: the number of bytes in the Idt.

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

• idt.h
• idt.cpp

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